齿圈激光表面相变硬化处理技术研究

Studies on Technology of Transformation Hardening On Laser Surface of Ring-gear

本文对齿圈齿面的激光表面强化技术进行了研究。提出了齿圈齿面激光表面淬火的偏置技术、变速扫描技术和辅助冷却技术 ,获得了沿齿面均匀分布的硬化层。检测表明 :齿圈精度最大下降 1级。采用扫描电镜和透射电镜 ,对齿圈激光淬火后淬硬层显微组织特性进行了分析 ,结果表明 :激光淬火硬化区依其组织特征 。

In this paper, the hardening technology on laser surf ac e of ring-gears was studied and the three key techniques was proposed by using t he techniques. An uniform hardened case along the flank of ring-gears was obtain ed. The test results shown that the deformation of ring-gears was small. Microst rueture of laser hardened ring-gear was analysed with SEM and TEM. The results s hown that the laser hardened case was divided into three parts according the mic rostructure characteristic.