DIE STEEL FOR DIE-CASTING AND DIE FOR DIE-CASTING

摘要

PROBLEM TO BE SOLVED: To provide a die steel for die-casting having excellent machinability, toughness and heat cracking resistance as well, and to provide a die for die-casting.;SOLUTION: The die steel for die-casting comprises, by mass%, 0.02% or more but less than 0.1% C, 1.0% or less Si, 0.1-3.0% Mn, 0.01-0.05% S, 2.0% or less Ni, 1.0-3.0% Cr, 2.0% or less one or both of Mo and W in terms of (Mo+1/2W), 0.01-1.0% V, more than 0.5% but 3.0% or less Cu, and the balance Fe with unavoidable impurities. The steel may include 0.005-0.05% P and/or 0.003% or less B. The die for die-casting is produced with the use of the above steel.;COPYRIGHT: (C)2007,JPO&INPIT