Transactions of Materials and Heat Treatment

Title：Experiment on surface workhardening of spline by high speed cold roll beating

Authors： Xu Hongyu Liu Yuhui Bu Min Cui Fengkui

Unit： Henan University of Science and Technology Luoyang Ship Material Research Institute

KeyWords： cold rollbeating involute spline microhardness microstructure degree of hardening

ClassificationCode：TH161

year,vol(issue):pagenumber：2017,42(3):165-169

Abstract：

For the involute spline, the microhardness and scanning electron microscope experiments of workpiece processed by high speed cold roll-beating were carried out. It was analyzed the variation trends of spline surface hardness in different positions with different depths with the same process parameter and the changes of spline surface hardening degree and microstructure with different process parameters. The experiment results show that the surface hardness of addendum, pitch and dedendum tends to reduce with the increase of distance from the tooth surface with different process parameters. The matrix hardness of workpiece is 238.5 HV, and the spline surface forms work-hardening layer. In the addendum, the hardness is the smallest,and the hardening layer is the shallowest. In the dedendum, the hardness is lower than that of the pitch, the harden layer is up to 1.5 mm. The spline surface hardening degree increases with the increase of feed rate at the same rotation speed, and decreases with the increase of rotation speed at the same feed rate.

Funds：

国家自然科学基金资助项目（51475146，51475366）

徐红玉(1972-)，男，博士，教授刘玉会（1989-），女，硕士研究生

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