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Encyclopedia > Soldering
(De)soldering a contact from a wire.
(De)soldering a contact from a wire.

Soldering is a process in which two or more metal items are joined together by melting and flowing a filler metal into the joint, the filler metal having a relatively low melting point. Soft soldering is characterized by the melting point of the filler metal, which is below 400 °C.[1] The filler metal used in the process is called solder. Caption: ROYAL AIR FORCE LAKENHEATH, England -- Airman 1st Class Jeremy Clapper desolders the firing contact on a LAU-106 missile launcher here April 7. ... Caption: ROYAL AIR FORCE LAKENHEATH, England -- Airman 1st Class Jeremy Clapper desolders the firing contact on a LAU-106 missile launcher here April 7. ... This article is about metallic materials. ... The melting point of a solid is the temperature range at which it changes state from solid to liquid. ... A solder is a fusible metal alloy, with a melting point or melting range of 180-190°C (360-370 °F), which is melted to join metallic surfaces, especially in the fields of electronics and plumbing, in a process called soldering. ...


Soldering is distinguished from brazing by use of a lower melting-temperature filler metal; it is distinguished from welding by the base metals not being melted during the joining process. In a soldering process, heat is applied to the parts to be joined, causing the solder to melt and be drawn into the joint by capillary action and to bond to the materials to be joined by wetting action. After the metal cools, the resulting joints are not as strong as the base metal, but have adequate strength, electrical conductivity, and water-tightness for many uses. Soldering is an ancient technique mentioned in the Bible and there is evidence that it was employed up to 5000 years ago in Mesopotamia. [2] This article is about the metal joining process. ... Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. ... Capillary Flow Experiment to investigate capillary flows and phenomena onboard the International Space Station Capillary action, capillarity, capillary motion, or wicking is the ability of a substance to draw another substance into it. ... Wetting of different fluids. ...

Contents

Applications

The most frequent application of soldering is assembling electronic components to printed circuit boards (PCBs). Another common application is making permanent but reversible connections between copper pipes in plumbing systems. Joints in sheetmetal objects such as food cans, roof flashing, rain gutters and automobile radiators have also historically been soldered, and occasionally still are. Jewelry and small mechanical parts are often assembled by soldering. Soldering is also used to join lead came and copper foil in stained glass work. Soldering can also be used to effect a semi-permanent patch for a leak in a container cooking vessel. Various components An electronic component is a basic electronic element usually packaged in a discrete form with two or more connecting leads or metallic pads. ... Part of a 1983 Sinclair ZX Spectrum computer board. ... A plumber wrench for working on pipes and fittings A complex arrangement of rigid steel piping, stop valves regulate flow to various parts of the building. ... Flashing is the weatherproofing shielding put around objects which protrude from the roof of a building (such as pipes and chimneys, or the edges of other roofs) to deflect water away from the seams. ... Rain gutter A rain gutter (also known as eavestrough, guttering or just gutter) is a narrow channel, or trough, forming the component of a roof system which collects and diverts rainwater shed by the roof. ... Not to be confused with radiata. ... Jewelry (the American spelling; spelled jewellery in Commonwealth English) consists of ornamental devices worn by persons, typically made with gems and precious metals. ... A came is a divider bar used between small pieces of glass to make a larger glazing panel, sometimes referred to as leaded glass. ... Copper-foil glasswork is the art and craft of connecting pre-cut pieces of glass by wrapping their edges with copper adhesive tape, then soldering the copper-wrapped edges together. ... This article is on the techniques of lead came and copper foil glasswork. ...


Solders

Main article: Solder

Soldering filler materials are available in many different alloys for differing applications. In electronics assembly, the eutectic alloy of 63% tin and 37% lead (or 60/40, which is almost identical in performance to the eutectic) has been the alloy of choice. Other alloys are used for plumbing, mechanical assembly, and other applications. A solder is a fusible metal alloy, with a melting point or melting range of 180-190°C (360-370 °F), which is melted to join metallic surfaces, especially in the fields of electronics and plumbing, in a process called soldering. ... An alloy is a homogeneous hybrid of two or more elements, at least one of which is a metal, and where the resulting material has metallic properties. ... A eutectic or eutectic mixture is a mixture of two or more elements which has a lower melting point than any of its constituents. ...


A eutectic formulation has several advantages for soldering; chief among these is the coincidence of the liquidus and solidus temperatures, i.e. the absence of a plastic phase. This allows for quicker wetting out as the solder heats up, and quicker setup as the solder cools. A non-eutectic formulation must remain still as the temperature drops through the liquidus and solidus temperatures. Any differential movement during the plastic phase may result in cracks, giving an unreliable joint. Additionally, a eutectic formulation has the lowest possible melting point, which minimizes heat stress on electronic components during the soldering process. In chemistry, materials science, and physics, the liquidus is a line on a phase diagram above which a given substance is stable in the liquid phase. ... In chemistry, materials science, and physics, the solidus is a line on a phase diagram below which a given substance is stable in the solid phase. ...


Lead-free solders are suggested anywhere children may come into contact (since children are likely to place things into their mouths), or for outdoor use where rain and other precipitation may wash the lead into the groundwater. Common solder alloys are mixtures of tin and lead, respectively:

  • 63/37: melts between 180–185 °C (356–365 °F)
  • 60/40: melts between 183–190°C (361–374 °F)
  • 50/50: melts between 185–215°C (365–419 °F)

Lead-free solder alloys melt around 250 °C (482 °F), depending on their composition.


For environmental reasons, 'no-lead' solders are becoming more widely used. Unfortunately most 'no-lead' solders are not eutectic formulations, making it more difficult to create reliable joints with them. See complete discussion below; see also RoHS. The Directive on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment (RoHS) 2002/95/EC [1] (commonly referred to as the Restriction of Hazardous Substances Directive) was adopted in February 2003 by the European Union. ...


Other common solders include low-temperature formulations (often containing bismuth), which are often used to join previously-soldered assemblies without un-soldering earlier connections, and high-temperature formulations (usually containing silver) which are used for high-temperature operation or for first assembly of items which must not become unsoldered during subsequent operations. Specialty alloys are available with properties such as higher strength, better electrical conductivity and higher corrosion resistance. General Name, Symbol, Number bismuth, Bi, 83 Chemical series poor metals Group, Period, Block 15, 6, p Appearance lustrous pink Standard atomic weight 208. ... This article is about the chemical element. ...


Flux

Main article: flux (metallurgy)

In high-temperature metal joining processes (welding, brazing and soldering), the primary purpose of flux is to prevent oxidation of the base and filler materials. Tin-lead solder, for example, attaches very well to copper, but poorly to the various oxides of copper, which form quickly at soldering temperatures. Flux is a substance which is nearly inert at room temperature, but which becomes strongly reducing at elevated temperatures, preventing the formation of metal oxides. Secondarily, flux acts as a wetting agent in the soldering process, reducing the surface tension of the molten solder and causing it to better wet out the parts to be joined. In metallurgy, flux is a substance which removes passivating oxides from the surface of a metal or alloy. ... In metallurgy, flux is a substance which removes passivating oxides from the surface of a metal or alloy. ... Redox reactions include all chemical processes in which atoms have their oxidation number (oxidation state) changed. ... Surfactants, also known as wetting agents, lower the surface tension of a liquid, allowing easier spreading. ... This box:      Surface tension is a property of the surface of a liquid that causes it to behave as an elastic sheet. ...


Fluxes currently available include water-soluble fluxes (no VOC's required for removal) and 'no-clean' fluxes which are mild enough to not require removal at all. Performance of the flux needs to be carefully evaluated; a very mild 'no-clean' flux might be perfectly acceptable for production equipment, but not give adequate performance for a poorly-controlled hand-soldering operation. This article describes a highly specialized aspect of its subject in the Terminology and legal definitions section. ...


Traditional rosin fluxes are available in non-activated (R), mildly activated (RMA) and activated (RA) formulations. RA and RMA fluxes contain rosin combined with an activating agent, typically an acid, which increases the wettability of metals to which it is applied by removing existing oxides. The residue resulting from the use of RA flux is corrosive and must be cleaned off the piece being soldered. RMA flux is formulated to result in a residue which is not significantly corrosive, with cleaning being preferred but optional. A 20 g cake of amber violin bow rosin. ... Corrosion is the destructive reaction of a metal with another material, e. ...


Basic soldering techniques

Methods

Soldering operations can be performed with hand tools, one joint at a time, or en masse on a production line. Hand soldering is typically performed with a soldering iron, soldering gun, or a torch, or occasionally a hot-air pencil. Sheetmetal work was traditionally done with "soldering coppers" directly heated by a flame, with sufficient stored heat in the mass of the soldering copper to complete a joint; torches or electrically-heated soldering irons are more convenient. All soldered joints require the same elements of cleaning of the metal parts to be joined, fitting up the joint, heating the parts, applying flux, applying the filler, removing heat and holding the assembly still until the filler metal has completely solidified. Depending on the nature of flux material used, cleaning of the joints may be required after they have cooled.


The distinction between soldering and brazing is arbitrary, based on the melting temperature of the filler material. A temperature of 450 °C is usually used as a practical cut-off. Different equipment and/or fixturing is usually required since (for instance) a soldering iron generally cannot achieve high enough temperatures for brazing. Practically speaking there is a significant difference between the two processes—brazing fillers have far more structural strength than solders, and are formulated for this as opposed to maximum electrical conductivity. Brazed connections are often as strong or nearly as strong as the parts they connect, even elevated temperatures. Using a soldering iron. ...


"Hard soldering" or "silver soldering" (performed with high-temperature solder containing up to 40% silver) is also often a form of brazing, since it involves filler materials with melting points in the vicinity of, or in excess of, 450 °C. Although the term "silver soldering" is used much more often than "silver brazing", it may be technically incorrect depending on the exact melting point of the filler in use. In silver soldering ("hard soldering"), the goal is generally to give a beautiful, structurally sound joint, especially in the field of jewelry. Thus, the temperatures involved, and the usual use of a torch rather than an iron, would seem to indicate that the process should be referred to as "brazing" rather than "soldering", but the endurance of the "soldering" apellation serves to indicate the arbitrary nature of the distinction (and the level of confusion) between the two processes.


Induction soldering is a process which is similar to brazing. The source of heat in induction soldering is induction heating by high-frequency AC current. Generally copper coils are used for the induction heating. This induces currents in the part being soldered. The coils are usually made of copper or a copper base alloy. The copper rings can be made to fit the part needed to be soldered for precision in the work piece. Induction soldering is a process in which a filler metal (solder) is placed between the faying surfaces of (to be joined) metals. The filler metal in this process is melted at a fairly low temperature. Fluxes are a common use in induction soldering. This is a process which is particularly suitable for soldering continuously. The process is usually done with coils that wrap around a cylinder/pipe that needs to be soldered. Some metals are easier to solder than others. Copper, silver, and gold are easy. Iron and nickel are found to be more difficult. Because of their thin, strong oxide films, stainless steel and aluminum are a little more difficult. Titanium, magnesium, cast irons, steels, ceramics, and graphites can be soldered but it involves a process similar to joining carbides. They are first plated with a suitable metallic element that induces interfacial bonding.


Electronic components (PCBs)

A tube of multicore electronics solder used for manual soldering
A tube of multicore electronics solder used for manual soldering

Currently, mass-production printed circuit boards (PCBs) are mostly wave soldered or reflow soldered, though hand soldering of production electronics is also still standard practice for many tasks. In wave soldering, parts are temporarily adhered to the PCB with small dabs of adhesive, then the assembly is passed over flowing solder in a bulk container. Reflow soldering is a process in which a solder paste (a sticky mixture of powdered solder and flux) is used to stick the components to their attachment pads, after which the assembly is heated by an infrared lamp, or (more commonly) by passing it through a carefully-controlled oven, or soldering with a hot air pencil. Since different components can be best assembled by different techniques, it is common to use two or more processes for a given PCB; the surface mounted parts may be reflow soldered, followed by a wave soldering process for the through-hole mounted components, with some of the bulkier parts hand-soldered on last. Image File history File linksMetadata Ersin_Multicore_Solder_Tube. ... Image File history File linksMetadata Ersin_Multicore_Solder_Tube. ... Part of a 1983 Sinclair ZX Spectrum computer board. ... Wave Soldering is a large-scale soldering process by which electronic components are soldered to a printed circuit board (PCB) to form an electronic assembly. ... Reflow soldering is the most common means to attach a surface mounted component to a circuit board, and typically consists of applying solder paste, positioning the devices, and reflowing the solder in a conveyorized oven. ... Solder paste (or solder cream) is a mix of small solder particles and flux. ... Surface-mount components on a flash drives circuit board Surface mount technology (SMT) is a method for constructing electronic circuits in which the components (SMC, or Surface Mounted Components) are mounted directly onto the surface of printed circuit boards (PCBs). ... A through-hole component, also spelled thru-hole, is an Electronic component that has pins designed to be inserted into holes and soldered to pads on a printed board. ...


For hand soldering of electronic components, the heat source tool should be selected to provide adequate heat for the size of joint to be completed. A 100 watt soldering iron may provide too much heat for printed circuit boards, while a 25 watt iron will not provide enough heat for large electrical connectors, joining copper roof flashing, or large stained-glass lead came. Using a tool with too high a temperature can damage sensitive components, but protracted heating by a tool that is too cool or under powered can also cause extensive heat damage.


Hand-soldering techniques require a great deal of skill to use on the finest pitch chip packages. In particular ball grid array (BGA) devices are notoriously difficult if not impossible to rework by hand. Integrated circuit of Atmel Diopsis 740 System on Chip showing memory blocks, logic and input/output pads around the periphery Microchips with a transparent window, showing the integrated circuit inside. ... For the Bulgarian Go Association, see Bulgarian Go Association. ...


For attachment of electronic components to a PCB, proper selection and use of flux helps prevent oxidation during soldering, which is essential for good wetting and heat transfer. The soldering iron tip must be clean and pre-tinned with solder to ensure rapid heat transfer. Components which dissipate large amounts of heat during operation are sometimes elevated above the PCB to avoid PCB overheating. After inserting a through-hole mounted component, the excess lead is cut off, leaving a length of about the radius of the pad. Plastic or metal mounting clips or holders may be used with large devices to aid heat dissipation and reduce joint stresses. Wetting of different fluids. ...


A heat sink may be used on the leads of heat sensitive components to reduce heat transfer to the component. This is especially applicable to germanium parts. (Note the heat sink will mean the use of more heat to complete the joint.) If all metal surfaces are not properly fluxed and brought above the melting temperature of the solder in use, the result will be an unreliable 'cold soldered' joint.


To simplify soldering, beginners are usually advised to apply the soldering iron and the solder separately to the joint, rather than the solder being applied direct to the iron. When sufficient solder is applied, the solder wire is removed. When the surfaces are adequately heated, the solder will flow around the joint. The iron is then removed from the joint.


Since non-eutectic solder alloys have a small plastic range, the joint must not be moved until the solder has cooled down through both the liquidus and solidus temperatures. Visually, a good solder joint will appear smooth and shiny, with the outline of the soldered wire clearly visible. A matt grey surface is a good indicator of a joint that was moved during soldering. Too little solder will result in a dry and unreliable joint; too much solder (the 'solder blob' very familiar to beginners) is not necessarily unsound, but tends to mean poor wetting. With some fluxes, flux residue remaining on the joint may need to be removed, using water, alcohol or other solvents compatible with the process. Excess solder and unconsumed flux and residue is sometimes wiped from the soldering iron tip between joints. The tip of the iron is kept wetted with solder ("tinned") when hot to minimise oxidation and corrosion of the tip itself.


Environmental legislation in many countries, and the whole of the European Community area, has led to a change in formulation of both solders and fluxes. Water soluble non-rosin based fluxes have been increasingly used since the 1980s so that soldered boards can be cleaned with water or water based cleaners. This eliminates hazardous solvents from the production environment, and effluent. The European Community (EC) was originally founded on March 25, 1957 by the signing of the Treaty of Rome under the name of European Economic Community. ...


Pipe/mechanical soldering

soldered copper pipes
soldered copper pipes

Since copper is an outstanding conductor of heat, and has a high heat capacity as well, large copper items like plumbing pipes and fittings require far more heat to solder effectively than an iron or gun can provide. The best choice for most plumbing jobs is a propane torch, though for large jobs MAPP gas is occasionally used. Image File history File linksMetadata Size of this preview: 796 × 599 pixelsFull resolution (2816 × 2120 pixel, file size: 1. ... Image File history File linksMetadata Size of this preview: 796 × 599 pixelsFull resolution (2816 × 2120 pixel, file size: 1. ... A propane torch is a tool for burning the flammable gas propane. ... A set of MAPP and oxygen cylinders used for oxy-fuel welding and cutting. ...


As with all solder joints, all parts to be joined must be clean and oxide free. Internal and external wire brushes are available for the common pipe and fitting sizes; emery cloth and wire-wool are frequently used as well. Emery is a very hard rock type used to make abrasive powder. ...


Because of the size of the parts involved, and the high activity and contaminating tendency of the flame, plumbing fluxes are typically much more chemically active, and more acidic, than electronic fluxes. Because plumbing joints may be done at any angle, even upside down, plumbing fluxes are generally formulated as pastes which stay in place better than liquids. Flux should be applied to all surfaces of the joint, inside and out. Flux residues should be removed after the joint is complete or they can, eventually, erode through the copper substrates and cause failure of the joint.


Many plumbing solder formulations are available, with different characteristics such as higher or lower melting temperature, depending on the specific requirements of the job. Building codes currently almost universally require the use of lead-free solder for potable water piping, though traditional tin-lead solder is still available. Some people maintain that the immediate risks of leaded solder are minimal, since minerals in municipal or well water supplies almost immediately coat the inside of the pipe, but studies have shown that lead-soldered plumbing pipes can result in elevated levels of lead in drinking water, which is particularly toxic to children.[citation needed] As with most heavy metals, lead poisoning is cumulative and can build up over many years. Lead poisoning is a medical condition, also known as saturnism, plumbism, or painters colic caused by increased blood lead levels. ...


Since copper pipe quickly conduct heat away from a joint, great care must be taken to ensure that the joint is properly heated through to obtain a good joint. After the joint is properly cleaned, fluxed and dry-fitted, the torch flame is applied to the thickest part of the joint, typically the fitting with the pipe inside it, with the solder applied on the opposite end of the joint. Dripping solder and flux, and hot parts, present a burn hazard to installers. When all the parts are heated through, the solder will melt and flow into the joint by capillary action. The torch may need to be moved around the joint to ensure all areas are wetted out; the molten solder will follow the heat of the torch around the joint. When the joint is properly wetted out, the solder and then the heat are removed, and while the joint is still very hot, it is usually wiped with a dry rag. This removes excess solder as well as flux residue before it cools down and hardens.


Pipes should be well flushed before drinking the water, to ensure that any flux residue from the inside of the joint has been removed.


Stained glass soldering

Historically, stained glass soldering tips were copper, heated by placing in a charcoal-burning brazier. Multiple tips were used; when one tip cooled down from use, it was placed back in the brazier of charcoal and the next tip was used. Strictly speaking, stained glass is glass that has been painted with silver stain and then fired. ...


More recently, electrically heated soldering irons are used. These consist of coil or ceramic heating elements inside the tip of the iron. Different power ratings are available, and temperature can be controlled electronically. These characteristics allow longer beads to be run without interrupting the work to change to a heated soldering tip. Soldering irons designed for electronic use are often effective though sometimes a bit underpowered for the heavy copper and lead came used in stained glass work.


Desoldering and resoldering

Main article: Desoldering

Used solder contains some of the dissolved base metals and is unsuitable for reuse in making new joints. Once the solder's capacity for the base metal has been achieved it will no longer properly bond with the base metal, usually resulting in a brittle cold solder joint with a crystalline appearance. Solders can be removed using a vacuum plunger (on the right) and a soldering iron. ...


It is good practice to remove solder from a joint prior to resoldering—desoldering braids or vacuum desoldering equipment (solder suckers) can be used. Desoldering wicks contain plenty of flux that will lift the contamination from the copper trace and any device leads that are present. This will leave a bright, shiny, clean junction to be resoldered.


The lower melting point of solder means it can be melted away from the base metal, leaving it mostly intact though the outer layer will be "tinned" with solder. Flux will remain which can easily be removed by abrasive or chemical processes. This tinned layer will allow solder to flow into a new joint, resulting in a new joint, as well as making the new solder flow very quickly and easily.


Lead-free electronic soldering

More recently environmental legislation has specifically targeted the wide use of lead in the electronics industry. The RoHS directives in Europe require many new electronic circuit boards to be lead free by 1 July 2006, mostly in the consumer goods industry, but in some others as well. The Directive on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment (RoHS) 2002/95/EC [1] (commonly referred to as the Restriction of Hazardous Substances Directive) was adopted in February 2003 by the European Union. ...


Many new technical challenges have arisen with this endeavour. For instance, traditional lead-free solders have a significantly higher melting point than lead-based solders, which renders them unsuitable for use with heat-sensitive electronic components and their plastic packaging. To overcome this problem, solder alloys with a high silver content and no lead have been developed with a melting point slightly lower than traditional solders.


Lead-free construction has also extended to components, pins, and connectors. Most of these pins used copper frames, and either lead, tin, gold or other finishes. Tin finishes are the most popular of lead-free finishes. Nevertheless, this brings up the issue of how to deal with tin-whiskers. The current movement brings the electronics industry back to the problems solved in the 1960s by adding lead. JEDEC has created a classification system to help lead-free electronic manufacturers decide what provisions to take against whiskers, depending upon their application. Metal whiskers are a crystalline metallurgical phenomenon whereby metal grows tiny, filiform hairs. ... JEDEC stands for Joint Electron Device Engineering Council and is the semiconductor engineering standardization body of the Electronic Industries Alliance (EIA), a trade association that represents all areas of the electronics industry. ...


Soldering defects

Various problems may arise in the soldering process which lead to joints which are non functional either immediately or after a period of use. The most common defect when hand-soldering results from the parts being joined not exceeding the solder's liquidus temperature, resulting in a "cold solder" joint. This is usually the result of the soldering iron being used to heat the solder directly, rather than the parts themselves. Properly done, the parts to be connected are heated by the iron, which in turn melts the solder, guaranteeing adequate heat in the joined parts for thorough wetting.


An improperly selected or applied flux can cause joint failure, or if not properly cleaned off the joint, may corrode the metals in the joint over time and cause eventual joint failure. Without flux the joint may not be clean, or may be oxidized, resulting in an unsound joint.


Movement of metals being soldered before the solder has cooled will cause a highly unreliable cracked joint.


Common tools

Hand-soldering tools include the electric soldering iron, which has a variety of tips available ranging from blunt to very fine to chisel heads for hot-cutting plastics, and the soldering gun, which typically provides more power, giving faster heat-up and allowing larger parts to be soldered. Hot-air guns and pencils allow rework of component packages which cannot easily be performed with irons and guns. Using a soldering iron. ... A soldering gun is in affect a transformer. ... Rework is a term used in several contexts. ...


Soldering torches are a type of soldering device that uses a flame rather than a soldering iron tip to heat solder. Soldering torches are often powered by butane[3] and are available in sizes ranging from very small butane/oxygen units suitable for very fine but high-temperature jewelry work, to full-size oxy-fuel torches suitable for much larger work such as copper piping.


Toaster ovens and hand held infrared lights have been used to reproduce production processes on a much smaller scale.


Bristle brushes are usually used to apply plumbing paste flux. For electronic work, flux-core solder is generally used, but additional flux may be used from a flux pen or dispensed from a small bottle with a syringe-like needle.


Wire brush, wire wool and emery cloth are commonly used to prepare plumbing joints for connection. Electronic joints rarely require mechanical cleaning. Coated abrasives are made of abrasive grains adhered to the surface of flexible or semi-flexible backings such as paper, cloth, vulcanized fiber, plastic films. ...


For PCB assembly and rework, alcohol and acetone are commonly used with cotton swabs or bristle brushes to remove flux residue. A heavy rag is usually used to remove flux from a plumbing joint before it cools and hardens. A fiberglass brush can also be used.


For electronic work, solder wick and vacuum-operated "solder sucker" are used to undo solder connections. This item is used for removing solder from any solder joint. ...


See also

Solders can be removed using a vacuum plunger (on the right) and a soldering iron. ... A solder is a fusible metal alloy, with a melting point or melting range of 180-190°C (360-370 °F), which is melted to join metallic surfaces, especially in the fields of electronics and plumbing, in a process called soldering. ... A Link Lock is a type of mechanical connection used in the jewellery industry. ...

Notes

  1. ^ Rahn, Armin (1993). "1.1 Introduction", The Basics of Soldering. John Wiley & Sons. ISBN 0471584711. 
  2. ^ Brady, George et al (1996). Materials Handbook. McGraw Hill, 768-70. ISBN 0070070849. 
  3. ^ http://www.toolingu.com/definition-660130-28677-soldering-torch.html

External links

  • Basic soldering guide
  • RoHS Directive 2002/95/EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment.
  • ELFNET (European Lead Free Soldering Network, a website where will be decided what the replacements will be for the present day's lead-tin alloy
  • European Association for Brazing and Soldering - A detailed technical library and information about soldering and brazing.
  • Induction soldering - An overview of soldering with induction and a collection of Application Notes
  • American Welding Society Brazing and Soldering Forums A technical discussion group focused on brazing and soldering.
  • soldering silver jewellery An illustrative and practical guide to soldering silver jewellery.
  • Electronics constructional techniques A variety of pages illustrating different aspects of soldering and constructional techniques for electronics circuits.
  • Desoldering Guide Photo sequence showing step by step how to desolder a circuitboard using a sucker and solder wick.


Metalworking:

Fabrication: Image File history File links This is a lossless scalable vector image. ... Turned chess pieces Metalworking is the craft and practice of working with metals to create structures or machine parts. ...

Pan brake · Crimp · English Wheel · Guillotine · Ironworker · Nibbler · Sheet metal forming · Sheet metal · Soldering This article or section is missing references or citation of sources. ... Crimping is joining two pieces of metal or other malleable material by deforming one or both of them to hold the other. ... The English Wheel is a manually operated metal working apparatus that allows a craftsman to curve flat sheets of metal, aluminium, or steel. ... A guillotine is a machine used to accurately cut sheet metal. ... This particular machine stands over 6 ft (1. ... In metalwork, a nibbler is a tool for cutting sheet metal. ... Sheet metal forming refers to the various processes used to convert cold rolled metal sheet into finished parts such as aluminium cans and automobile body panels. ... Sheets of stainless steel cover the Chrysler Building Thin sheets of gold leaf Sheet metal is simply metal formed into thin and flat pieces. ...

Jewellery making:

Casting · Centrifugal casting · Cloisonné · Doming technique · Draw plate · Engraving · Filigree · Findings · Fretwork · Goldwork · Lapidary · Metal clay · Millesimal fineness · Omega chain · Persian weave · Relief · Repoussé and chasing · Soldering · Vacuum casting · Water torch · Wire wrap jewellery This article is about the manufacturing process. ... Centrifugal casting or rotocasting is a casting technique which has application across a wide range of industrial and artistic applications: It is used as a means of casting small, detailed parts or jewelry. ... Cloisonné is a multi-step enamel process used to produce jewelry, vases, and other decorative items. ... doming blocks and punch The technique of doming (or dapping) is used to make spheres or hemispheres of metal. ... Draw plate front Draw plate back Draw plate top edge Draw plates are used to draw wire to make it thinner. ... Hercules fighting the Centaurs , engraving by Sebald Beham Engraving is the practice of incising a design onto a hard, usually flat surface, by cutting grooves into it. ... Filigree (formerly written filigrann or filigrane) is a jewel work of a delicate kind made with twisted threads usually of gold and silver. ... Findings refers to jewellery components used to put together the jewelry. ... Fretwork is an interlaced decorative design that is either carved in low relief on a solid background, or cut out with a fretsaw, jigsaw or scrollsaw. ... Goldwork is a type of metalwork particularly concerned with gold and its use in jewellery and coinage. ... A lapidary (the word means concerned with stones) is an artisan who practices the craft of working, forming and finishing stone, mineral, gemstones, and other suitably durable materials (amber, shell, jet, pearl, copal, coral, horn and bone, glass and other synthetics) into functional and/or decorative, even wearable, items (e. ... Metal clay, is a clay-like medium used to make jewelry, beads and small sculpture. ... Millesimal fineness is a system of denoting the purity of platinum, gold and silver alloys by parts per thousand of pure metal in the alloy. ... An Omega chain is a pseudo-chain made by assembling metallic links on a wire or woven mesh. ... Persian weave is a methode of weave used in jewelry and other art forms. ... In the art of sculpture, a relief is an artwork where a modelled form projects out of a flat background. ... Repoussé bracelet by Thomas Feeser, ©2005. ... Vacuum casting is a means of casting small metal parts or jewelry that have fine detail or for casting various plastic materials. ... A water torch, sometimes called a water welder, is a device that produces a high-temperature directed flame and is used for precision welding, brazing, and cutting of metals typically employed in the making of jewelry,electronics boards and parts, and fiber optic applications. ... Wire wrap jewellery is a type of design and method of hand jewellery fabrication. ...

Casting · CNC · Cutting tools · Drilling and threading · Fabrication · Forging · Grinding · Jewellery · Lathe · Machining · Machine tooling · Measuring · Metalworking · Hand tools · Metallurgy · Milling · Occupations · Press tools · Pipe and tube bending · Smithing · Turning · General terminology · Welding This article is about the manufacturing process. ... For other uses, see CNC (disambiguation). ... a Cutting Tool, in the context of Metalworking is any tool that is used to remove metal from the workpiece by means of shear deformation. ... Drilling is the process of using a drill bit in a drill to produce holes. ... A typical steel fabrication shop Fabrication, when used as an industrial term, applies to the building of machines , structures, process equipment for chemical, fertilizer sector by cutting, shaping and assembling components made from raw materials. ... This article is about smithing. ... Rotating abrasive wheel on a bench grinder. ... For the Korean music group, see Jewelry (group). ... Center lathe with DRO and chuck guard. ... A lathe is a common tool used in machining. ... A machine tool is a powered mechanical device, typically used to fabricate metal components of machines by the selective removal of metal. ... The examples and perspective in this article or section may not represent a worldwide view. ... Turned chess pieces Metalworking is the craft and practice of working with metals to create structures or machine parts. ... Metalworking hand tools are hand tools that are used in the metalworking field. ... Georg Agricola, author of De re metallica, an important early book on metal extraction Metallurgy is a domain of materials science that studies the physical and chemical behavior of metallic elements, their intermetallic compounds, and their compounds, which are called alloys. ... Endmills for a milling machine. ... It has been suggested that this article or section be merged with Smith (metalwork). ... Power press with a fixed barrier guard A press, or a machine press is a tool used to work metal (typically steel) by changing its shape and internal structure. ... A smith, or metalsmith, is a person involved in the shaping of metal objects. ... Turning, CNC turning, or manual turning is the process used to produce cylindrical components in a lathe. ... This article needs to be wikified. ... Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. ...


  Results from FactBites:
 
How To Solder (999 words)
Soldering is defined as "the joining of metals by a fusion of alloys which have relatively low melting points".
Soldering is also a must have skill for all sorts of electrical and electronics work.
Soldering irons are the heat source used to melt solder.
Solder - Wikipedia, the free encyclopedia (1233 words)
A solder is a fusible metal alloy, with a melting point or melting range below 450 °C (840 °F), which is melted to join metallic surfaces, especially in the fields of electronics and plumbing, in a process called soldering.
Solder often comes pre-mixed with, or is used with, flux, a reducing agent designed to help remove impurities (specifically oxidised metals) from the points of contact to improve the electrical connection.
Since solder can occasionally splash (due to the superheated flux inside or from contact with water in the cleaning sponge), it is recommended that one always wear safety goggles when soldering.
  More results at FactBites »

 
 

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