强力旋压成形工艺参数对连杆衬套力学性能及微观组织的影响  

Influence of power spinning forming process parameters on mechanical properties and microstructure of connecting rod bushing

作　　者：李兴艳 赵俊生[1] 刘继林[2] 张忠伟 席奇豪 LI Xing-yan;ZHAO Jun-sheng;LIU Ji-lin;ZHANG Zhong-wei;XI Qi-hao(College of Mechanical Engineering,North Univeristy of China,Taiyuan 030051,China;The Military Representative Office of Chinese People＇s Liberation Army in No.616 Factory,Datong 037036,China;China Armed Industry Group Seventh Research Institute,Tianjin 300400,China)

机构地区：[1]中北大学机械工程学院,山西太原030051 [2]中国人民解放军驻616厂军事代表室,山西大同037036 [3]中国兵器工业集团第七0研究所,天津300400

出　　处：《塑性工程学报》2018年第4期74-79,共6页Journal of Plasticity Engineering

基　　金：山西省自然科学基金资助项目(2012011023-2);山西省高校高新技术产业化项目(20120021)

摘　　要：采用强力旋压对连杆衬套进行单因素试验,并对旋压后试件进行退火处理,以旋压主要工艺参数（减薄率、进给比、首轮压下量）为试验因素,以晶粒尺寸为评价指标,研究了退火后旋压工艺参数对连杆衬套力学性能及显微组织的影响。结果表明：在研究范围内,晶粒尺寸随减薄率的增大而减小;衬套的抗拉强度和屈服强度随减薄率的增加而增大,伸长率和断面收缩率减小;不同进给比下材料的抗拉强度和屈服强度呈先增后减趋势;衬套强度随首轮压下量的增加而增大,塑性降低,其中伸长率变化程度较大。The single factor test was conducted on the connecting rod bushing by using power spinning. Then,the connecting rod bushing was annealed after spinning. Taking main process parameters of spinning（thinning ratio,feed ratio and the first spinning wheel reduction） as experimental factors and the grain size as evaluation index,the effect of technological parameters on microstructure and mechanical properties of connecting rod bushing after annealing was studied. The results show that the grain size decreases with the increase of thinning rate in the range of the study; the tensile strength and yield strength of the connecting rod bushing increase with the increase of thinning rate,while the elongation and cross section shrinkage decrease; the tensile strength and yield strength increase firstly and then decrease with the increase of feed ratio; the strength of the connecting rod bushing increases with the increase of the first spinning wheel reduction,while the plasticity decreases,and the elongation changes greatly.

关 键 词：连杆衬套 旋压工艺 力学性能 微观组织 晶粒尺寸 

分 类 号：TG386.41[金属学及工艺—金属压力加工]