厚板Invar合金多层多道焊反变形数值模拟

Numerical simulation of multi-layer and multi-passes welding anti-deformation for thick plate Invar alloy

关键词:  Invar合金|多层多道焊|反变形|数值模拟

Key words:  Invar alloy|multi-layer and multi-passes welding|anti-deformation|numerical simulation

摘要:

文中针对19.05 mm厚Invar合金模具材料多层多道MIG焊接，采用有限元仿真分析和试验验证相结合的方法，分别对无反变形角的模型和施加不同反变形角的模型进行数值模拟，用模拟时所设计的反变形角进行Invar合金多层多道MIG焊试验，分析焊后试样的变形情况，与模拟结果对比分析.结果表明，当施加的反变形角为2°时可以有效控制100 mm × 100 mm × 19.05 mm的Invar合金四层十道MIG焊的焊后角变形，焊后残余翘曲高度为?0.11 mm，焊后残余角变形为?0.12°，与模拟结果的误差在8%之内. 结果表明，有限元模拟技术对于试验探究具有预测和引导作用.

Abstract:

Finite element simulation was applied in multi-layer and multi-passes MIG welding of 19.05 mm thick Invar alloy to simulate the non-deformable models and the models with different anti-deformation angles. Then the Invar alloy multi-layer and multi-passes MIG welding experiments were carried out with the anti-deformation angle, which was designed according to the simulation results, besides, the deformation of the post welding specimen was analyzed. The result showed that the 2 degree anti-deformation angle could effectively control the post welding angular deformation of the four-layer and ten-passes MIG welding for 100 mm × 100 mm × 19.05 mm Invar alloy. The post-weld residual warpage height is −0.11 mm and the post-weld residual angular deformation is −0.12 degree. The error between the results and the simulation results was less than 8%. This conclusion proved that the finite element simulation technology had prediction and guidance for experiments.