热锻参数对汽车转向节力学性能的影响分析  

Effect of Hot Forging Parameters on Mechanical Properties of Automobile Steering Knuckle

作　　者：成林[1] 张文明[2] 隋美丽[1] CHENG Lin;ZHANG Wenming;SUI Meili(School of Automotive Engineering, Beijing Polytechnic, Beijing 100176, China;School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China)

机构地区：[1]北京电子科技职业学院汽车工程学院,北京100176 [2]北京科技大学机械工程学院,北京100083

出　　处：《热加工工艺》2018年第9期148-151,共4页Hot Working Technology

基　　金：北京市教育委员会科技发展计划面上项目(KM201610858002);国家自然科学基金资助项目(50475173)

摘　　要：采用不同的始锻温度、终锻温度和锻压速度对汽车转向节进行了锻造,并进行了拉伸性能和冲击性能的测试与分析。结果表明：随始锻温度从1050℃增大到1200℃或终锻温度从880℃增大到1040℃,汽车转向节的抗拉强度、屈服强度不断增大,而断后伸长率和冲击吸收功不断减小;随锻压速度从60 mm/s增加至300 mm/s,汽车转向节的抗拉强度、屈服强度先增大后减小,而断后伸长率和冲击吸收功先减小后增大。汽车转向节合理的始锻温度、终锻温度和锻压速度分别为1175℃、960℃、180 mm/s。The automobile steering knuckles were forged by using different initial forging temperatures, final forging temperatures and forging speeds. And the tensile properties and impact properties were tested and analyzed. The results show that with initial forging temperature increasing from 1050 ℃ to 1200 ℃ or final forging temperature increasing from 880 ℃ to1040 ℃, the tensile strength and yield strength increase, while the elongation after fracture and impact absorbing energy of the automobile steering knuckle decrease continuously. With forging speed increasing from 60 mm/s to 300 mm/s, the tensile strength and yield strength firstly increase and then decrease, while the elongation after fracture and impact absorbing energy of the automobile steering knuckle firstly decrease and then increase. The reasonable initial forging temperature, final forging temperature and forging speed of the automobile steering knuckle are 1175 ℃, 960 ℃ and 180 mm/s, respectively.

关 键 词：热锻参数 汽车转向节 拉伸性能 冲击性能 

分 类 号：TG316[金属学及工艺—金属压力加工]