COLD TOOL STEEL SUITABLE FOR SURFACE TREATMENT, DIE AND TOOL FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To produce a cold tool steel, die and tool easily treatable in heat treatment and working and suitable for surface hardening treatment with ≥400°C treating temp. at low cost. ;SOLUTION: This cold tool steel suitable for the surface treatment is the one having a compsn. contg., by weight, 0.70 to 1.20% C, ≤2.0% Si, ≤1.5% Mn, 5.0 to 11.0% Cr, one or two kinds of Mo and W by 3.0 to 5.0% by Mo equivalent (1/2W+Mo), and the balance Fe with inevitable impurities, and in which high hardness of 63 to 66HR can be obtd. by high temp. tempering at ≥500°C. In addition to the above components, one or ≥ two kinds among 0.5 to 4.0% Co, 0.01 to 0.30% S and ≤60ppm N are furthermore added.;COPYRIGHT: (C)1997,JPO