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Encyclopedia > Stellite

Stellite is also the name of a winning racehorse trained in Scotland, sometimes called The Burr.


Stellite alloy is a range of cobalt-chromium alloys designed for wear resistance. It may also contain tungsten and a small but important amount of carbon. It is a trademarked name of the Deloro Stellite Company and was invented by Elwood Haynes [1] in the early 1900s as a substitute for flatware that stained (or that had to be constantly cleaned). wikipedia sucks big balls For other uses, see Cobalt (disambiguation). ... General Name, Symbol, Number chromium, Cr, 24 Chemical series transition metals Group, Period, Block 6, 4, d Appearance silvery metallic Standard atomic weight 51. ... An alloy is a homogeneous mixture of two or more elements, at least one of which is a metal, and where the resulting material has metallic properties. ... In materials science, wear is the erosion of material from a solid surface by the action of another solid. ... General Name, Symbol, Number tungsten, W, 74 Chemical series transition metals Group, Period, Block 6, 6, d Appearance grayish white, lustrous Standard atomic weight 183. ... General Name, Symbol, Number carbon, C, 6 Chemical series nonmetals Group, Period, Block 14, 2, p Appearance black (graphite) colorless (diamond) Standard atomic weight 12. ... For other senses of this word, see Trademark (disambiguation). ... This article needs additional references or sources for verification. ... Elwood Haynes (born in Portland, Indiana on October 14, 1857) was an American inventor. ... Starch_polyester disposable cutlery Cutlery refers to any hand utensil used in preparing, serving, and especially eating food. ...

Contents

Properties

Stellite alloy is a completely non-magnetic and non-corrosive cobalt alloy. There are a number of Stellite alloys, with various compositions optimised for different uses. Information is available from the manufacturer, Deloro Stellite, outlining the composition of a number of Stellite alloys and their intended applications. The alloy currently most suited for cutting tools, for example, is Stellite 100, due to the fact that this alloy is quite hard, maintains a good cutting edge even at high temperature, and resists hardening and annealing due to heat. Other alloys are formulated to maximize combinations of wear resistance, corrosion resistance, or ability to withstand extreme temperatures. It has been suggested that this article or section be merged with magnet. ... See corrosive for the hazard. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... Annealing, in metallurgy and materials science, is a heat treatment wherein the microstructure of a material is altered, causing changes in its properties such as strength and hardness. ... In materials science, wear is the erosion of material from a solid surface by the action of another solid. ...


Stellite alloys display astounding hardness and toughness, and are also usually very resistant to corrosion. Stellite alloys are so hard that they are very difficult to machine, and anything made from them is, as a result, very expensive. Typically a Stellite part will be very precisely cast so that only minimal machining will be necessary. Machining of Stellite is more often done by grinding, rather than by cutting. Stellite alloys also tend to have extremely high melting points due to the cobalt and chromium content. In materials science, hardness is the characteristic of a solid material expressing its resistance to permanent deformation. ... In materials science and metallurgy, toughness is the resistance to fracture of a material when stressed. ... A lathe is a common tool used in machining. ... Casting may be used to create artistic sculptures Casting is a manufacturing process by which a molten material such as metal or plastic is introduced into a mold, allowed to solidify within the mold, and then ejected or broken out to make a fabricated part. ... In materials processing a grinder is a machine for producing fine particle size reduction through attrition and compressive forces at the grain size level. ... The melting point of a crystalline solid is the temperature at which it changes state from solid to liquid. ...


Stellite is a registered trade mark of the Deloro Stellite Group


Applications

Typical applications include saw teeth, hardfacing (wear-resistant welding), and also for acid-resistant machine parts. Stellite was a major improvement in the production of poppet valves and valve seats in internal combustion engines; by reducing wear in them, the competing slide-valve design was driven from the market. The first third of M60 machine gun barrels (starting from the chamber) are lined with Stellite. Modern jet engine turbine blades are usually made of Stellite alloys, due to their very high melting points and tremendous strength at very high temperatures. In the early 1980s, experiments were done in the United Kingdom to make artificial hip joints and other bone replacements out of precision-cast Stellite alloys. Portable saw A saw is a tool for cutting wood or other material, consisting of a serrated blade (a blade with the cutting edge dentated or toothed) and worked either by hand or by steam, water, electric or other power. ... A humans visible teeth. ... Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. ... Acidity redirects here. ... A poppet valve is a valve consisting of a hole, usually round or oval, and a tapered plug, usually a disk shape on the end of a shaft also called a valve stem. ... This article does not cite any references or sources. ... The M60 (formally the United States Machine Gun, Caliber 7. ... A machine gun is a fully-automatic firearm that is capable of firing bullets in rapid succession. ... The barrel of a firearm is the tube, usually metal, through which a controlled explosion is released in order to propel a projectile out of the end at great speed. ... In firearms, the chamber is the part of the barrel in which the cartridge is inserted prior to being fired. ... A Pratt and Whitney turbofan engine for the F-15 Eagle is tested at Robins Air Force Base, Georgia, USA. The tunnel behind the engine muffles noise and allows exhaust to escape. ... A Siemens steam turbine with the case opened. ... This article does not cite any references or sources. ... In anatomy, the hip is the bony projection of the femur which is known as the greater trochanter, and the overlying muscle and fat. ... To meet Wikipedias quality standards, this article or section may require cleanup. ...


Stellite has also been used in the manufacture of turning tools for lathes. With the introduction and improvements in tipped tools it is not used as often any more, but it was found to have superior cutting properties compared to the early carbon steel tools and even some high speed steel tools, especially against difficult materials as stainless steel. Care was needed in grinding the blanks and these were marked at one end to show the correct orientation, without which the cutting edge could chip prematurely. A tool bit generally refers to a plain High Speed Steel (HSS) tool. ... Center lathe with DRO and chuck guard. ... A tipped tool or insert generally refers to any cutting tool where the cutting edge consists of a seperate piece of material, either brazed or clamped on to a seperate body. ... Carbon steel, also called plain carbon steel, is a metal alloy, a combination of two elements, iron and carbon, where other elements are present in quantities too small to affect the properties. ... High speed steel (often abbreviated HSS) is a material usually used in the manufacture of machine tool bits and other cutters. ... The 630 foot high, stainless-clad (type 304L) Gateway Arch defines St. ...


While Stellite remains the material of choice for certain internal parts in industrial process valves (valve seat hardfacing), its use has been discouraged in nuclear power plants. In piping that can communicate with the reactor, tiny amounts of Stellite would be released into the process fluid and eventually enter the reactor. There the cobalt would be activated by the neutron flux in the reactor and become cobalt-60, a radioisotope with a five year half life that releases very energetic gamma rays. While not a hazard to the general public, about a third to a half of nuclear worker exposures could be traced to the use of Stellite and to trace amounts of cobalt in stainless steels. Replacements for Stellite have been developed by the industry, such as the Electric Power Research Institute’s “Norem”, that provide acceptable performance without cobalt. Since the United States nuclear power industry has begun to replace the Stellite valve seat hardfacing in the late 1970s and to tighten specifications of cobalt in stainless steels, worker exposures due to cobalt-60 have dropped significantly. For fusion power, see Fusion power. ... neutron flux n : the rate of flow of neutrons; the number of neutrons passing through a unit area in unit time via dictionary. ... A radionuclide is an atom with an unstable nucleus, which is a nucleus characterized of excess energy which is available to be imparted either to a newly-created radiation particle within the nucleus, or else to an atomic electron (see internal conversion) . The radionuclide, in this process, undergoes radioactive decay... For other uses, see half-life (disambiguation). ... This article is about electromagnetic radiation. ... The 1970s decade refers to the years from 1970 to 1979, also called The Seventies. ...


Varieties

Talonite is an alloy similar to Stellite which has been hot-rolled and hardened in a particular way, to provide a combination of hardness, wear resistance and machinability. Not all Stellite alloys respond to this process. A lathe is a common tool used in machining. ...


Notes

  1. ^ "The WPI International Corporate Leaders Roundtable: The Impact of Evolving Technologies on the Future of Business: Notable Achievements of Alumni of Worcester Polytechnic Institute". Elwood Haynes, Class of 1881.

Stellite is a registered trade mark of the Deloro Stellite Group


External links

  • Material Safety Data Sheet for stellite, includes table of compositions of individual variants


Metalworking:

Metalworking cutting tools: Image File history File links Blacksmith-hammer-anvil-50x50. ... Turned chess pieces Metalworking is the craft and practice of working with metals to create structures or machine parts. ...

Broach | Burr | Chisel | Counterbore | Countersink | Cutting tool | End mill | Metalwork file | File | Hand scraper | High speed steel | Milling cutter | Reamer | Stellite | Tipped tool | Tool bit A push style 5/16 keyway broach A broach is a series of chisel points mounted on one piece of steel. ... A selection of carbide burrs Burrs are small cutters used in die grinders, rotary tools or dentists drills. ... Steel woodworking chisel. ... Two types of counter bores A counterbore can refer to a cylindrical flat-bottomed hole, which enlarges another hole, or the tool used to create that feature. ... A countersink is a tapered hole drilled with a wide outer portion. ... 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. ... Several types of endmills An endmill is a type of Milling cutter, a cutting tool used in industrial milling applications. ... A File (or Hand-File) is a metalworking hand tool used to shape material by abrasion. ... Detail of a double-cut flat file A file (or hand-file) is a hand tool used to shape material by cutting. ... Three different engineering hand scrapers A hand scraper is a single-edged tool used to scrape metal from a surface. ... High speed steel (often abbreviated HSS) is a material usually used in the manufacture of machine tool bits and other cutters. ... Milling cutters are cutting tools used in milling machines or machining centres. ... A reamer or ream is a tool for enlarging holes and is used in metalworking. ... A tipped tool or insert generally refers to any cutting tool where the cutting edge consists of a seperate piece of material, either brazed or clamped on to a seperate body. ... A tool bit generally refers to a plain High Speed Steel (HSS) tool. ...


Metalworking topics:   Turned chess pieces Metalworking is the craft and practice of working with metals to create structures or machine parts. ...

Casting | CNC | Cutting tools | Drilling and threading | Fabrication | Finishing | Grinding | Jewellery | Lathe (tool) | Machining | Machine tooling | Measuring | Metalworking | Hand tools | Metallurgy | Milling | Occupations | Press tools | Smithing | Terminology | Welding Casting may be used to create artistic sculptures Casting is a manufacturing process by which a molten material such as metal or plastic is introduced into a mold, allowed to solidify within the mold, and then ejected or broken out to make a fabricated part. ... A CNC Turning Center A CNC Milling Machine The abbreviation CNC stands for computer numerical control, and refers specifically to a computer controller that reads G-code instructions and drives the machine tool, a powered mechanical device typically used to fabricate metal components by the selective removal of metal. ... 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 chas an industrial term, applies to the building of machines and structures by cutting, shaping and assembling components made from raw materials. ... Metalworking finishing is the activity of making things out of metal in a skillful manner. ... Rotating abrasive wheel on a bench grinder. ... Amber jewellery in the form of pendants Jewellery (also spelled jewelry, see spelling differences) is a personal ornament, such as a necklace, ring, or bracelet, made from jewels, precious metals or other substance. ... Conventional metalworking lathe In woodturning, metalworking, metal spinning, and glassworking, a lathe is a machine tool which spins a block of material so that when abrasive, cutting, or deformation tools are applied to the block, it can be shaped to produce an object which has rotational symmetry about an axis... 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. ... Metallurgy is a domain of materials science and of materials engineering that studies the physical and chemical behavior of metallic elements, their intermetallic compounds, and their mixtures, 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. ... This article needs to be wikified. ... Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. ...


  Results from FactBites:
 
Stellite® Alloy 4 Cobalt Chromium Alloy (417 words)
Adhesive wear is similar to Stellite alloy 6, but resistance improves as the load increases.
Stellite Alloy 4 has higher corrosion resistance than Stellite alloy 6 in oxidizing environments such as nitric and sulphuric acids.
The modified alloy Stellite 4B resist abrasion and corrosion from manganese dioxide, carbon particles and ammonium and zinc chlorides used in the dry battery industry.
  More results at FactBites »

 
 

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