行星架内花键感应淬火工艺优化

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Abstract： Aiming at the quenching cracking problem existing in the induction hardening processof internal splines of planet carrier，the causes of quenching cracking were analyzed from aspects of chemical composition，macrocrack morphology and induction heat treatment process.The problem of induction hardening cracking of internal splines was solved by optimizing process parameters，such as reducing heating power，adopting multi-stage heating， and increasing the concentration of quenching cooling medium.The results show that after the optimization and improvement of the induction hardening process，the surface hardness of the internal spline reaches 46～53HRC ，the depth of the hardenedlayer onthe tooth sideis ⩾2mm ，and the deformationis controlledwithin 0.18～0.25mm

eywords： internal spline;induction hardening;cracking; process optimization

1序言

行星架组件是行星齿轮传动中最为关键的部件[1]，主要由行星齿轮、太阳轮和行星架等组成[2]。（剩余3106字）