摘要
针对2024铝合金对接焊,基于Abaqus软件平台,建立了搅拌摩擦焊接过程的有限元分析模型。模拟了焊接过程中搅拌头的压入、停留过程以及整个温度场的瞬态变化。模拟结果表明,降低搅拌头的压入速度以及延长搅拌头的停留时间都能使焊接压入端的温度峰值升高,但压入速度的影响相对不大。适当延长停留时间能使搅拌头压入端达到材料熔点温度的70%左右,有利于获得良好的焊接质量;但停留时间也不能过长,否则会造成焊接过程中的温度过高,甚至超过焊材的熔点。
Based on Abaqus software, a finite element model was established to simulate the friction stir welding of 2024 aluminum alloy. And then the processes of the tool penetration and tool reserving and transient temperature field were researched. The simulation results show that reducing the penetration speed of rotational tool and increasing the reserving time of tool can make the peak temperature value increase, but the effect of the penetration speed is not apparently enough. The reasonable reserving time can make the temperature of tool penetration position reach 70 % of material fusion temperature, which is good for the quality of weldment. However, if the reserving time is big enough, the temperature during the welding process can exceed the melting point of welded material.
出处
《热加工工艺》
CSCD
北大核心
2013年第1期171-173,共3页
Hot Working Technology
关键词
搅拌摩擦焊
有限元模拟
压入速度
停留时间
温度场
friction stir welding
finite element simulation
penetration speed
reserving time
temperature field
