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在浇注时，对Ｃｒ１２类模具钢进行变质处理．使共晶碳化物在锻造加热过程中就发生断网，甚至粒化，改善了锻前共晶碳化物的形态，有助于锻造工艺的简化．
In pouring, the Cr12 class mold steel deterioration. So that the eutectic carbide in the forging heating process occurred on the network, and even granulation, to improve the shape of eutectic carbide before forging, to help simplify the forging process.