Hardening wear resistant coatings made by heat treat? Naturally. with so many processes available, where do you start? How does one select?
Commence with an appreciation of your metal chemistry. For instance, dimensionally stable steels, those with higher carbon and higher chromium content, are renowned for their great resistance to wear.
Due to chromium, other expedient carbide forming elements as well, like tungsten, manganese or molybdenum, can produce high toughness. However aside from amalgamate composition, consider material stress reduction, tempering or austenitizing temperatures. If you would like the best distribution of carbide, toughness quality of the metal matrix, that is. How can we outline toughness, anyhow? Most commonly, toughness is a measure of a surface’s capability to resist hollow, deformation, when another object is applied with pressure against it. Values reflect explicit loads, over given areas, by counter-face hollow, of known material properties. Heat treatment possibilities are wide and change. And they are particular.
Hence do know the differences among these thin films. Otherwise, negative outcomes can include, dependent on metal and heat treat process, inter-granular ( oxidization ) cracking, breakdown in grain boundary, precipitant formation, kept austenite, and other issues.
“Ion nitriding” steel, as an example, involves diffusion of nitrogen into the metal. Based totally on reactions between electrically ionized nitrogen with amalgamating elements, harder surfaces, though shallow, are formed. Another choice in heat treating is “carburizing.” There, higher temperatures are a requirement to diffuse carbon into the metal surface, to a particular depth, for the production of martensite. Before you select your heat treat, understand these actions, their effects on metallurgy, and what surface properties best fit your wishes. Only then, will your hardening wear resistant coatings serve you best!
Read more about carbonitriding, it is also a wear resistant coating.
Read more about things to harden base metal instead going for a wear resistant coating.