摘要
对铝合金LF3Y2搭接板进行了热压条件下激光深熔焊接。建立了该条件下的焊接热源模型,热源模型由作用在工件表面的高斯面热源和沿激光入射方向的旋转高斯体热源构成。使用该热源模型和ANSYS有限元分析软件对前述的试验进行了数值模拟。结果表明,热压使激光在高速焊接时依然有足够的熔深和熔宽;试件表面的等温线呈椭圆形,在移动热源前方温度梯度大,后方温度梯度小;计算所得的熔池截面成形与工艺试验结果吻合良好,验证了该热源模型的合理性。
Deep penetration laser welding was performed at aluminum alloy LF3Y2 under hot and press condition. A heat source model, which comprises a gauss plane heat source on the top surface and a revolved gauss body heat source, was presented in this condition. Numerical simulation was adopted by the heat source model and ANSYS software. The results show that sufficient width and penetration of weld could be obtained under high speed welding operation and the isotherms looked like ellipse. The temperature gradient was correspondingly higher in the front of moving heat source than at the end. The cross-section morphology of simulation welded joint was almost in accordance with the results attained by experiments which confirmed the reasonableness of the model.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2007年第8期41-44,共4页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目(50575091)
关键词
激光深熔焊接
热源模型
数值模拟
温度场
deep penetration laser welding
heat source model
numerical simulation
temperature field
