汽车空心EPS转向轴旋锻工艺及显微组织研究  

Research on rotary forging process and microstructure of automobile hollow EPS steering shaft

作　　者：周昆凤 周志明[1,2,3] 涂坚 汪学静 罗荣 方飞松[4] ZHOU Kunfeng;ZHOU Zhiming;TU Jian;WANG Xuejing;LUO Rong;FANG Feisong(School of Material Science and Engineering, Chongqing University of Technology, Chongqing 400054, China;Chongqing Key Laboratory of Mold Technology, Chongqing 400054, China;Jiangsu Xianghe Electronic Technology Co. , Ltd. , Xuzhou 221214, China;Chongqing Construction Industry Co. , Ltd. , Chongqing, 400054, China)

机构地区：[1]重庆理工大学材料科学与工程学院,重庆400054 [2]模具技术重庆市重点实验室,重庆400054 [3]江苏祥和电子科技有限公司,江苏徐州221214 [4]重庆市建设工业(集团)有限责任公司,重庆400054

出　　处：《重庆理工大学学报（自然科学）》2022年第2期89-92,共4页Journal of Chongqing University of Technology：Natural Science

基　　金：重庆市技术创新与应用产业类重点项目(cstc2018jszx-cyzdX005,cstc2019jscx-ydX0072);重庆市英才计划项目(2020RC22);重庆市巴南区科技项目(2021TJZ013)。

摘　　要：为了研究汽车空心EPS转向轴的旋锻成形工艺及显微组织,设计了正交实验,并对样品的微观组织及性能进行了检测。结果表明:通过旋锻成形的转向轴内外表面光滑,变径处过渡均匀,内齿形状规整,无明显折叠及裂纹产生;粗大的晶粒旋锻后成为具有择优取向的纤维组织,材料致密度得到显著提高。经检测,旋锻成形的汽车全空心转向轴的硬度、静扭强度和低载疲劳等各项指标均达到了使用要求。This paper designed orthogonal test,tested the microstructure and properties of the sample to investigate the rotary forging process and microstructure of automotive hollow EPS steering shaft.The results show that both inner and outer surfaces of steering shaft are smooth with a smooth transition of changing diameter.The shape of the internal gear is regular,and there is no folding and crack phenomenon after forming by rotary forging technology.Furthermore,the coarse grains deform to fibrous with preferred orientationand the compactness of the material improves after forged.Finally,the hardness,static torsional strength,low load fatigue and other properties of automotive hollow EPS steering shaft can reach the requirements after testing.

关 键 词：汽车空心EPS转向轴 旋锻成形 显微组织 

分 类 号：U466[机械工程—车辆工程] TG316[交通运输工程—载运工具运用工程]