一、对在火焰炉内完全淬火的零件结构上的主要要术: 1.完全淬火的零件,自一个断面到另一断面的过渡区应平滑和缓,以免尖角处在淬硬和矫正时开裂。 2.对於大型的和形状复杂的零件,建议采用联合热处理方法;完全调质或正火后再局部淬硬零件的工作部分──这样限制了零件的淬硬性, First, the complete quenching of the flame in the furnace structure of the main parts to surgery: 1. Fully quenched parts, from one section to another section of the transition zone should be smooth and gentle, so sharp corners in the hardened and corrective cracking . 2. For large and complex shape parts, the proposed joint heat treatment method; fully quenched or normalized and then part of the hardened part of the work part - so limited the hardenability of the parts,