DIE STEEL EXCELLENT IN MACHINABILITY AND ELECTRIC DISCHARGE MACHINABILITY

摘要

PURPOSE: To provide a die steel having high hardness required of press die and also excellent in machinability as well as in discharge machinability. ;CONSTITUTION: This steel is a die steel which has a composition consisting of, by weight, 0.05-0.45% C, ≤2.0% Si, ≤2.0% Mn, 0.5-4.0% Ni, 10.0-15.0% Cr, W and/or Mo by the amount of 0.2-1.0% expressed in terms of (1/2W+Mo), 0.5-4.0% Al or 0.5-3.0% Cu, and the balance Fe with inevitable impurities and further containing, preferably, 0.02-0.20% S and also has superior machinability and discharge machinability.;COPYRIGHT: (C)1993,JPO&Japio