摩擦条件对无缝异径管冷成形的影响研究  

Effect of friction condition on seamless reducer cold forming process

作　　者：唐巧生 王谌[3] 李鸣[1,2] 

机构地区：[1]江苏华阳金属管件有限公司,江苏镇江212400 [2]江苏省核电及船舶用管件工程研究中心,江苏镇江212400 [3]南京航空航天大学材料科学与技术学院,江苏南京210016

出　　处：《锻压技术》2011年第6期145-148,共4页Forging & Stamping Technology

基　　金：江苏省重大科技成果转化项目(BA2006067)

摘　　要：利用数值模拟研究了316L无缝不锈钢异径管成形过程中,不同轴向的等效应力和应变的分布情况。在此基础上,比较了不同的摩擦系数下,异径管件两端厚度的情况。模拟结果显示:管壁随着摩擦系数的增加而厚度增加;摩擦系数较小时,厚度均匀性也会改善。根据数值模拟结果,进行了实际的异径管冷挤压成形,得到的产品完全高于核电用异径管产品相关标准。研究结果表明,通过控制管件成形的关键技术可以有效改善异径管的成形性能。The distributions of different axial equivalent stresses and strains were investigated by means of the numerical simulation during the forming process of SS316L seamless reducer.Then,the thicknesses of both reducer＇s ends were analyzed under different friction coefficients.The results of simulation show that the thickness of reducers increase with the augment of friction coefficients and the uniformity of the reducer＇s thickness is improved either when friction coefficient is small.The practical extrusion forming of reducers was performed based on the simulation results,and the production was totally complied with the relevant standard.The results indicate that the better controlling of key technology could improve the reducer formability.

关 键 词：316L不锈钢 无缝异径管 缩径成形 冷挤压 数值模拟 摩擦系数 

分 类 号：TG386.43[金属学及工艺—金属压力加工]