摘要
以Al-4.5Cu低温合金作为焊材模拟工业生产中大壁厚钢板焊接过程,施加脉冲磁场作为细化焊缝区晶粒的外场作用源,研究了不同脉冲磁场施加方式、励磁线圈结构、脉冲磁场参数变化以及凝固工艺参数对焊缝凝固组织的影响。试验结果表明,施加脉冲磁场能改善焊缝凝固组织,使柱状晶向等轴晶转化,细化焊缝区晶粒;特别在E形线圈横向脉冲磁场作用下的焊缝凝固组织细化效果更为明显。
A low-temperature alloy Al-4.5%Cu was used as the welding consumables to simulate the industrial welding production process of a thick-walled steel plate.Pulsed magnetic field was exerted as an outside refining source to investigate the effects of different ways of magnetic field,different excitation coil structure,different pulse magnetic parameters as well as the solidification process parameters on the weld solidification structure.Results show that the proper application of pulsed magnetic field can significantly improve the weld solidification structure,and transform from the columnar grain to equiaxed grain.The researches show that the use of E-type coil,which generates a transverse magnetic field,can get the best weld solidification structure.
出处
《焊接》
北大核心
2012年第3期26-31,70,共6页
Welding & Joining
关键词
脉冲磁场
晶粒细化
焊缝凝固组织
pulsed magnetic field
grain refinement
welding solidification structure
