一、问题的提出由于Cr12型钢具有淬透性高、耐磨性好、变形小的优点,所以在模具上应用普遍。实践证明:在目前锻造水平下,它比T10A、CrWMn等钢更容易在热处理后开裂,尤其是模具尺寸较大时更易出现裂纹。具体有以下两种情况: 1.同一形状、尺寸的Cr12模具,同放在一把钩子上吊挂于盐浴炉中加 First, the issue put forward As Cr12 steel with high hardenability, good wear resistance, the advantages of small deformation, so commonly used in the mold. Practice has proved that: at the current forging level, it is easier than T10A, CrWMn and other steel cracking after heat treatment, especially when the larger die size is more likely to crack. Specifically the following two situations: 1. The same shape, size Cr12 mold, with a hook on the hook in a salt bath furnace plus