Stellite

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Stellite is the commercial name for cobalt - chromium- based hard alloys . Today they are sold as non-ferrous alloys , but stellite with up to 20% iron by volume is also known from the 1950s.

Cutting tool - cutting wedge

Depending on the area of ​​application, Stellite contains proportions of chromium , tungsten , nickel , molybdenum and carbon , which has a major influence on the properties of the alloy due to the formation of carbides . The main feature of Stellite is a high resistance to wear such as corrosion or abrasion , which is maintained even at high temperatures, which makes them difficult to machine.

Stellite is preferred for components that are exposed to high wear loads. These include cutting tools , rail armouring of chainsaw swords, linings of gun barrels , parts of turbochargers , valve seats of internal combustion engines or marine diesel armor . Further applications can be found in power generation (turbines), food production, oil and gas extraction, in the glass industry, (petro) chemistry, in valve construction as a metal valve seat and in mechanical and plant engineering.

Stellite can be cast and as a coating material in the form of rods, powders, wires or electrodes, welded or sprayed onto heavily used surfaces.

Elwood Haynes

At the end of the 19th century, the American Elwood Haynes (1857–1925) patented these cobalt-based hard alloys, which got their name from the Latin word Stella (star) because of their sheen. The gold mine owner Michael John O'Brien , based in Deloro, Canada , received the license to produce it. Together, Haynes and O'Brien founded the Deloro Smelting and Refining Company Ltd. in 1917, from which the Deloro Stellite company later developed. In late 2012, Deloro Stellite was acquired by Kennametal Inc. and continued to sell Stellite. In 2015, the European plants of Deloro Stellite were taken over by Madison Industries in Chicago and renamed Deloro. In addition to its headquarters in Koblenz, Deloro produces at three other locations in Europe.

Web links

Individual evidence

  1. ^ Deloro - About Us. Retrieved January 27, 2019 .
  2. ^ Deloro - Contact. Retrieved January 27, 2019 .