CHROMIUM FREE AND LOW-CHROMIUM WEAR RESISTANT ALLOYS

摘要

Disclosed herein are embodiments of hardfacing/hardbanding materials, alloys, or powder compositions that can have low chromium content or be chromium free. In some embodiments, the alloys can contain transition metal borides and borocarbides with a particular metallic component weight percentage. The disclosed alloys can have high hardness and ASTM G65 performance, making them advantageous for hardfacing/hardbanding applications.

主权项

1. A low chromium or chromium-free ferrous alloy comprising less than or equal to about 3 wt. % chromium, wherein the alloy is formed into or configured to form a material comprising, under equilibrium solidification conditions:
a total mole fraction of transition metal borides and borocarbides of between about 5 and about 50%, wherein a metallic portion of the transition metal borides and borocarbides comprises greater than or equal to about 15 wt. % W+Mo; and a mole fraction of isolated carbides in the material between about 5 and about 40%, wherein isolated carbides are defined as MC type carbides having one or more of the following elements: V, Ti, Nb, Zr, Hf, W, Mo.