不同摩擦压力下TB2线性摩擦焊过程参量的变化规律研究  

Process Variables during Linear Friction Welding of TB2 under Different Friction Pressures

作　　者：赵治鹏 马铁军[1] 李文亚[1] 张勇[1] ZHAO Zhi-peng;MA Tie-jun;LI Wen-ya;ZHANG Yong(Shaanxi Key Laboratory of Friction Welding Technologies,State Key Laboratory of Solidification Processing,School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]西北工业大学材料学院凝固技术国家重点实验室陕西省摩擦焊接工程技术重点实验室

出　　处：《精密成形工程》2019年第6期24-28,共5页Journal of Netshape Forming Engineering

基　　金：国家自然科学基金(51675435)

摘　　要：目的深入分析钛合金线性摩擦焊接过程,掌握焊接参数变化时各摩擦阶段过程参量的变化规律及其与接头质量的关系。方法采用不同摩擦压力进行TB2钛合金线性摩擦焊接试验,基于信号采集获得了焊接过程典型参量的变化曲线。结果曲线特征分析表明,摩擦压力40 MPa时,在设定时间内未达到稳定摩擦阶段,曲线特征异常,接头明显未焊合。随摩擦压力增大至70和100MPa,各曲线变化规律与线性摩擦焊接4个典型阶段相吻合,分别得到焊缝宽度不同的无缺陷接头。70MPa下摩擦剪力过渡平缓,界面塑性金属的产生与挤出较为协调,焊接过程的稳定性及接头质量易于得到控制。结论通过对比不同参数下焊接过程参量的变化规律,有助于认识不同线性摩擦焊接过程的内在差异,从而判断接头质量并选取合适的焊接参数。The paper aims to deeply analyze the linear friction welding process of titanium alloy, master the variation rules of process variables during each friction stage under different welding parameters and their relationship with joint quality. The linear friction welding experiment of TB2 titanium alloy was carried out with different friction pressures. Based on signal acquisition, the variation curves of different typical variables during welding process were obtained. The curve characteristic analysis showed that when the friction pressure was 40 MPa, a stable friction phase was not reached within the predetermined time;the curve characteristics were abnormal, and the joint was obviously lack of penetration. With the friction pressure increased to 70 and 100 MPa, their curve variations corresponded with the four typical stages of linear friction welding, and the defect-free joints with different weld widths were obtained respectively. The friction shear force changed smoothly at 70 MPa, which meant that the generation and the extrusion of the interface plastic metal was coordinated;so the stability of the welding process and the joint quality were easily controlled. By comparing the variation rules of the process variables during welding under different parameters, it is helpful to understand the inherent differences of different linear friction welding processes, so as to judge the joint quality and select the appropriate welding parameters.

关 键 词：TB2钛合金 线性摩擦焊 过程参量 焊接参数 接头质量 

分 类 号：TG453.9[金属学及工艺—焊接]