转速对TC4摩擦焊接头温度分布与微观组织的影响  

Influence of Rotation Speed on Temperature Distribution and Microstructure of TC4 Friction Welded Joint

作　　者：李天鹏 张媛媛 张宏基[1] LI Tianpeng;ZHANG Yuanyuan;ZHANG Hongji(Colle ge of Energy Engineering,Yulin University,Yulin 719000,China;CNPC Baoji Oilfield Machinery Co.,LTD.,Baoji 721000,China)

机构地区：[1]榆林学院能源工程学院,陕西榆林719000 [2]中国石油宝鸡石油机械有限责任公司,陕西宝鸡721000

出　　处：《热加工工艺》2021年第3期33-36,共4页Hot Working Technology

基　　金：陕西省科技厅工业公关项目(2019GY-205)。

摘　　要：采用连续驱动摩擦焊技术对TC4钛合金进行了连接。利用热电偶测温及金相显微镜观察等分别研究了不同转速下TC4钛合金焊接接头界面区的温度分布及微观组织变化。结果表明,焊接界面的升温速率和峰值温度均随转速增加而增大,初始摩擦阶段升温速率最高达762℃/s,峰值温度最高达1041℃,且转速越高,焊接界面温度沿径向分布的均匀性越好。TC4摩擦焊接头焊合区组织为网篮状组织,热力影响区为双态组织。网篮状组织随转速增加而明显粗化。Continuous drive friction welding was employed to join TC4 titanium alloy. The temperature distribution and microstructure change of TC4 friction welded joint with different rotation speeds were analyzed by thermocouple measurement test and metallographic microscope observation. It is found that the heating rate and peak temperature of the welding interface increase with the rotation speed increasing, the heating rate and peak temperature in the initial friction stage are 762℃/s and 1041 ℃, respectively. And the welding interface temperature become more uniform along the radial direction when the rotation speed is higher. The microstructure of weld zone of the TC4 friction welded joint is closely woven and netted structure. And the microstructure of the thermo-mechanical heat-affected zone is double-stated structure. The netted structure is coarsening with the rotation speed increasing.

关 键 词：TC4钛合金 连续驱动摩擦焊 温度分布 微观组织 

分 类 号：TG453.9[金属学及工艺—焊接]