飞轮转速对35CrMnSi/T3惯性径向摩擦焊接特性的影响  

Effects of flywheel rotation speed on properties of 35CrMnSi/T3 inertial radial friction welding

作　　者：罗键[1] 赵国际[1,2] 王向杰[1,2] 吴玮[3] 徐晓菱[3] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044 [2]重庆大学材料科学与工程学院,重庆400044 [3]中国兵器工业部第五九研究所,重庆400039

出　　处：《重庆大学学报（自然科学版）》2010年第9期24-28,共5页Journal of Chongqing University

基　　金：教育部博士点基金资助项目(20070611030);教育部新世纪优秀人才支持计划(NCET-08-0607);重庆市自然科学基金资助项目(CSTC2008BB3303/CSTC2009BA3026)

摘　　要：应用CT-25特种摩擦焊机,在不同惯性飞轮转速条件下进行了35CrMnSi/T3的惯性径向摩擦焊接。利用电子扫描显微镜(SEM)观察界面微观结合特征及组织变化,能谱分析仪(EDS)检测界面元素的扩散,并测定了铜侧塑性变形区的硬度变化。试验结果表明:惯性飞轮转速增大,一级加压摩擦产热显著增加,有利于接触界面二级加压顶锻产生更大的塑性变形,促进工件接触面形成连接;飞轮转速3000r/min时,35CrMnSi/T3径向摩擦焊接头结合区清洁,再结晶区形成变形α-Fe和ε-Cu细晶组织,元素扩散明显,焊接效果良好;铜侧界面处由于剧烈塑性变形致使硬度升高。CT-25 special friction welding machine is used to weld 35CrMnSi/T3 with different inertial flywheel rotation speeds.The interface microcosmic binding characteristics and microstructure changes are observed by SEM.The element diffusion near the interface is detected by EDS and the microhardness of plastic deformation zone in Cu matrix is tested.The results show that,when the inertial flywheel rotation speed increases,friction heat of primary pressure increases significantly,more plastic deformation forms between the contact surfaces by secondary pressure,and bonding of work pieces is promoted.When the flywheel rotation speed is 3 000 r/min,the joint of 35CrMnSi/T3 by inertial radial friction welding process gets clean binding domain,elements obviously diffuses,the fine-grain α-Fe and ε-Cu structure forms in recrystallization zone and the welding effect is good.The microhardness ofinterface region in Cu matrix is increased by violent plastic deformation.

关 键 词：摩擦焊 35CrMnSi/T3 飞轮转速 扩散 

分 类 号：TG456.9[金属学及工艺—焊接]