随着近代化机器生产上的跃进,对机器零件有着更高的技术要求。这些要求除决定于原材料以外,更重要的决定于热处理质量的好坏,但在热处理工艺中最困难的就是淬火工序。这是由于淬火是需要把零件加热到规定的温度以后,再用相当快的冷却速度冷却下来,必然产生很大的应力,也就会带 With the leap forward in modern machine production, there is a higher technical requirement for machine parts. In addition to these requirements depends on the raw material, the more important decision depends on the quality of heat treatment, but the most difficult heat treatment process is the quenching process. This is because the need to quench the parts heated to the required temperature, and then cooled down with a fairly fast cooling rate, will inevitably have a lot of stress, it will bring