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美国Crucible材料公司研制出一种新的CPM Rex 121含高量钒钴的粉末冶金(PM)高强度工具钢且正大量面市。据该公司称,这种新型钢的特点是结合了任何一种高速钢的最大耐磨性、可达硬度和热硬度。 Crucible公司这种新制的CPM Rex121钢的热硬度和耐磨性均优于其原来的标准CPM Rex76钢,据称,这种钢的热硬性优势就在于其切削速度比其含钴高速钢提高25-50%。而在如此高速度下,其更大耐磨性仍可保持一种更锐利刃口。 Crucible公司称,这种CPM Rex121钢具有HRC70/71的可达硬度和最佳回火稳
US crucible materials company developed a new CPM Rex 121 high vanadium cobalt containing powder metallurgy (PM) high-strength tool steel and is on the market. According to the company, the new steel features a combination of the highest wear resistance of any high-speed steel up to hardness and hot hardness. The Crucible’s new CPM Rex121 steel is superior in hot and wear resistance to its predecessor, the standard CPM Rex76 steel, which is claimed to have the hot-hard advantage of being 25% faster than its cobalt-containing high-speed steel -50%. And at such a high speed, its greater wear resistance can still maintain a more sharp edge. Crucible said that this CPM Rex121 steel has a HRC70 / 71 reachable hardness and the best tempered