摘要
以LF5铝合金为研究对象,利用有限元软件MSC.Marc建立了平板对接接头搅拌摩擦焊过程的有限元模型,分析了焊接过程的温度场。结果表明:由于热传导区域范围的减少,当焊接热源接近平板端部时焊缝区域的温度峰值上升,不利于接头性能;当焊接速度减少或搅拌头的旋转速度升高时,焊接过程中的温度峰值升高甚至超过母材熔点。综合考虑实际工程效率与温度场影响接头质量的规律,给出了搅拌摩擦焊焊接工艺参数的优选方法。
The finite element model of butt joint of LF5 aluminum alloy was established by adopting the software MSC. Marc and then the temperature field during the process of friction stir welding was researched. The results of numerical simulation show that the peak value of temperature increases when the heat source is closed to the bottom of plane, which results from the decrease of region of heat conduction and then influences the quality of welded joint. With the decrease of welding speed and the increase of rotational velocity of rotational tool, the peak value of temperature increases. Considering the working efficiency and the effect of temperature on the quality of welded joint, the method about how to choose the welding procedure parameters was put forward.
出处
《热加工工艺》
CSCD
北大核心
2012年第23期145-147,共3页
Hot Working Technology
基金
国家自然科学基金项目(61074090)
关键词
搅拌摩擦焊
LF5铝合金
温度场
数值模拟
friction stir welding
LF5 aluminum alloy
temperature field
numerical simulation
