42CrMo钢铸造环坯辗扩成形理论与工艺分析  

Theoretical and Process Analyses on the Cast-blank Rolling Forming of 42CrMo Bearing Rings

作　　者：李永堂[1] 齐会萍[1] 付建华[1] 陈国桢 张峰[1] 秦芳诚[1] 

机构地区：[1]太原科技大学材料科学与工程学院,太原030024 [2]洛阳LYC轴承有限公司,洛阳471003

出　　处：《机械工程学报》2014年第2期77-85,共9页Journal of Mechanical Engineering

基　　金：国家自然科学基金重点(51135007);国家自然科学基金(51174140;51075290);高等学校博士点优先发展计划(20111415130001);山西省自然科学基金(2011011025-1)资助项目

摘　　要：与目前常用的环类零件生产工艺相比,基于环形铸坯的短流程铸辗复合成形新工艺具有节约材料和能源、缩短工艺流程等优点。以轴承环件常用的42CrMo钢为研究对象,探讨基于环形铸坯的轴承环件辗扩成形机理和工艺。借助于热力模拟试验和组织测试分析,揭示42CrMo钢在热变形条件下组织演变机理和规律;通过理论分析与数值模拟,研究铸坯环件辗扩成形过程中变形工艺参数及其对金属变形和组织演变规律的影响,实现环形零件铸辗复合成形/成性一体化调控;在洛阳LYC轴承股份有限公司,完成轴承套圈铸辗复合成形工业试验。试件的力学性能测试结果表明,这种短流程铸辗复合成形新工艺生产的环形零件具有良好的力学性能指标,可满足工业使用要求。As compared with commonly used manufacturing process, the new cast-rolling forming technology offing parts has many advantages such as saving energy and material and shortening production process. Taking 42CrMo steel commonly used in bearing ring for example, the rolling forming mechanism and process of bearing rings based on cast blanks is investigated. Microstruc^tre evolution mechanism and laws of 42CrMo during deformation is revealed by means of thermal simulation experiments and microstructure analysis. Forming process parameters and their influence on metal deformation and microstructure evolution during rolling forming of cast ring are researched by theoretical analysis and numerical simulation. The integration regulation of shaping and performance in cast-rolling process of ring part is achieved. The industrial test on cast-rolling forming of bearing rings is completed in Luoyang LYC Co., Ltd. It is shown from the results of experiments and performance tests that the ring parts produced by this new technology possess favorable mechanical character and meet the requirement of industrial use.

关 键 词：环形零件 42CRMO钢 铸辗复合成形 组织演变 环件辗扩 

分 类 号：TG335[金属学及工艺—金属压力加工]