双联齿轮高频淬火开裂原因分析

Cause Analysis of High Frequency Quenching Cracking of Double Gears

采用宏观检验、微观检验、淬硬层深度测定等方法,对45钢小模数双联齿轮高频淬火时发生的开裂现象进行分析。结果表明,双联齿轮中的裂纹是典型的弧形裂纹,主要是高频淬火淬硬层分布不合理引起的。而预先热处理调质组织粗大促进了弧形裂纹产生。

The cracking phenomenon of small modulus double gear of 45 steel during high frequency quenching was analyzed by means of macroscopic inspection, microscopic inspection and depth measurement of quenching layer. The results show that the crack in the double gear is a typical arc crack, which is mainly caused by the unreasonable distribution of high frequency hardening layer. However, the coarse microstructure of preheat treatment will promot the generation of arc crack.