Tool steel - free of grain coarsening during austenitising

摘要

Tool steel having good cutting performance and machinability, has compsn. (by wt.): 1-1.4% C, 4-6% Cr, 1-1.5% V, 7.5-13% W, 3.5-7% Mo, 9-15% Co, 0.03 - 0.08% N, bal. Fe.