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一、Gr12MoV钢冷冲模具我厂用的硅钢片冲模的形状较复杂。1973年前,对冲模采用盐浴炉800℃预热、1000℃加热淬油、200~220℃回火一小时的热处理工
First, Gr12MoV steel cold stamping dies I plant the shape of the silicon steel die more complicated. Before 1973, the use of salt bath furnace preheated 800 ℃, 1000 ℃ quenching, tempering at 200 ~ 220 ℃ for one hour heat treatment