TC4钛合金线性摩擦焊过程材料流动行为分析  

Material Flow Behavior in Linear Friction Welding of TC4 Titanium Alloy

作　　者：姬书得[1] 刘建光[2] 陶军[3] 张利国[1] 张田仓[3] 邹爱丽[1] 

机构地区：[1]沈阳航空航天大学航空航天工程学部,辽宁沈阳110136 [2]哈尔滨工业大学金属精密热加工国家重点实验室,黑龙江哈尔滨150001 [3]北京航空制造工程研究所,北京100024

出　　处：《北京理工大学学报》2013年第7期689-693,共5页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(51204111)

摘　　要：基于DEFORM软件建立了TC4钛合金线性摩擦焊的三维有限元模型,对焊接过程中材料的流动行为进行了数值模拟.结果表明,在整个线性焊过程中,摩擦面边缘附近材料的流动速度高于中心区域;在焊接过程的摩擦阶段,焊件摩擦面上的材料在平行与垂直焊件振动方向上都存在塑性流动行为;在顶锻阶段,摩擦面上的材料主要向摩擦面外流动,使试件的轴向缩短量继续增加.同时,摩擦面上材料的位移量随到摩擦面边缘距离的增加而减小,只有在较大轴向缩短量的情况下才可能实现线性摩擦焊在整个摩擦面上的自清理.The three-dimensional finite element model of linear friction TC4 titanium alloy was established on the basis of DEFORM software. welding （LFW） of The material flow behavior during the welding process was numerically simulated. The results show that the flow velocity of material near the edge of friction surface is bigger than that in the middle of friction surface. In the friction stage, the flow of material in the friction surface happens both parallel to and perpendicular to the vibration direction of weldment. In the forging stage, the material near edge line of friction surface undergoes big flow velocity and low temperature value, which makes the axial shortening of weldment increasing. The displacement of material perpendicular to the vibration direction decreases with the increase of distance away from the edge of friction surface, which shows that the self-cleaning of linear friction welding may happen in the whole friction surface only in the case of large axial shortening of weldment.

关 键 词：TC4钛合金 线性摩擦焊 流动行为 数值模拟 

分 类 号：TG453[金属学及工艺—焊接]