标题：Fatigue test and failure analysis of GD8020×1100 ball screw unit
作者：Yan, Ye ;Li, Cheng Nan ;Gai, Yu Hong ;Li, Bao Min ;Du, Wei ;Li, Mu Sen
通讯作者：Li, M S
作者机构：[Yan, Ye ;Li, Cheng Nan ;Gai, Yu Hong ;Li, Bao Min ;Li, Mu Sen ] Key Laboratory of Ministry of Education, Liquid-Solid Structural Evolution and Proces 更多
会议名称：International Conference on Vehicle and Mechanical Engineering and Information Technology, VMEIT 2014
会议日期：February 19, 2014 - February 20, 2014
来源：Applied Mechanics and Materials
摘要：By means of chemical composition testing, scanning electron microscopy observation, metallographic observation and hardness gradient detection etc, analysis of the typical failure samples from a well-known brand GD8020×1100 ball screw unit in the fatigue test was carried on. Results show that there is no obvious surface wear of the ball screw, showing the normal contact fatigue failure. But severe surface wear happens on the raceway of nut A with obvious flaking and many local cracks; which is the main reason leading to the failure of ball screw unit. So effective measures to avoid earlier failure of the ball screw unit can be put forward by controlling the steel quality strictly and improving the hardness and depth of the hardened layer on the raceway of nut A. © (2014) Trans Tech Publications, Switzerland.