热处理裂纹的分类：非淬火裂纹——表面龟裂、表面边缘T型裂纹；淬火裂纹——纵裂（组织应力型）、弧裂（局部拉应力型）、大型工件淬火裂纹（纵断、横断）、边廓表面裂纹（局部拉应力型）、脱裂、第二类应力裂纹
GH105合金冷拉棒表面存在的碎晶层和其内部的显微裂纹是热处理裂纹源。
It is suggested that the broken crystal layer and microcracks in surface layer of the cold drawn rod is the source of the heat treatment induced cracks.
钢的焊接CCT图，是正确选择焊接材料、确定最佳焊接工艺、消除焊接裂纹、制订焊后热处理规范的重要依据。
Welding CCT diagrams of steels are the basic to select welding material, determine the optimum welding technology, relieve welding cracks and lay down standard of past heat treatment.
然后通过试验，提出了新的热处理工艺，有效地解决了扳手的裂纹问题。
Through tests, a new technique of heat treatment is put forward, which efficiently solves the craze problem of wrenches.
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