摘要
利用便携式红外测温仪对Ti6Al4V钛合金超声波焊接的温度进行测试;利用ABAQUS大型有限元分析软件建立钛合金超声波焊接热-结构耦合二维轴对称有限元模型,对其不同焊接参数下的温度场和应力场进行分析。结果表明:用便携式红外测温仪所测钛合金超声波焊接焊点边缘的最高温度为620℃,与模拟的结果较接近;焊接界面为高温集中区,最高温度分布在界面中心位置(高达1172.4℃);焊接的温升在前10 ms陡升至500℃左右,随后的温升较平缓且近似线性的增长;最大应力发生在铁砧的上表面中心处,它随焊接压力的增加而增大,但是增加幅度不大;其次应力较大处为焊头边缘下方的钛合金界面处,它随焊接压力的增加而增大,并且增加幅度较大。
The ultrasonic welding temperature of Ti6A14V alloy was tested by portable infrared thermometer. Thermal-structure coupled finite element model which was in two dimensions and axial symmetry was built and the temperature field and stress field of the titanium alloy ultrasonic welding with different welding parameters were analyzed by ABAQUS software. The results show that the highest temperature of ultrasonic welding the edge of titanium alloy was tested by portable infrared thermometer, which is 620℃, is closed to the simulation result. The high temperature mainly concentrates upon weld interface and the highest temperature（1172.4℃） is located in the center of the weld interface. Temperature rise for welding rises sharply in the first 10 ms, but with the time increasing, the growth of temperature rise becomes gentle. The maximum stress occurs in the center of the top surface of the anvil and it increases slightly with the increase of the welding pressure. The second largest stress occurs in the place of the interface under welding head edge of titanium alloy and it increases significantly with the increase of welding pressure.
出处
《热加工工艺》
CSCD
北大核心
2013年第7期140-144,147,共6页
Hot Working Technology
基金
国家自然基金资助项目(50865007)
教育部科学技术研究重点项目(211093)
江西省自然科学基金项目(2010GZC0139)
