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大型零件热处理过程中,易出现开裂缺陷,一般实际生产中会从淬火厚度、加热温度、冷却速度等方面分析原因,但容易忽略过度淬火因素的存在。针对某次大型链轮经过热处理后出现开裂的情况,通过对材料化学成分,热处理工艺过程等方面进行分析,指出了过度淬火是主要成因。并针对开裂情况,提出机械加工处理措施,并利用有限元理论分析法对处理后的链轮进行了应力分析,为实际生产提供了理论依据。
Large parts of the heat treatment process, prone to cracking defects, the general actual production from the quenching thickness, heating temperature, cooling rate and other aspects of the analysis, but easy to overlook the existence of excessive quenching factors. In view of a large sprocket after heat treatment cracking occurs, through the chemical composition of the material, heat treatment process analysis aspects, pointed out that over quenching is the main cause. According to the cracking situation, the mechanical processing measures are put forward, and the stress analysis of the sprockets after the treatment is carried out by the finite element analysis method, which provides a theoretical basis for actual production.