不锈钢电弧铆焊工艺

Arc spot welding process of stainless steel

为了减小焊接变形,采用电弧铆焊的方法,以搭接形式连接3 mm和5 mm厚的0Cr18Ni9不锈钢钢板,主要研究三段焊接电流对焊点熔深、熔核尺寸及焊点抗剪力的影响。研究结果表明,随着第一段和第二段焊接电流的增大,焊点熔深、熔核尺寸及焊点抗剪强度随之增大。第一段焊接电流主要影响焊点的熔深,第二段焊接电流对焊点的熔深和熔核尺寸均有较大影响,尤其是熔核尺寸,而第三段焊接电流对熔深和熔核尺寸均无影响,却是焊点外观形貌的主要影响因素。优化第一段和第二段焊接电流的相关参数,可以提高焊点抗剪强度。

To reduce welding distortion,arc spot welding was used to join 3 mm and 5 mm thick 0Cr18Ni9 stainless steel sheets.Effects of three section welding current on weld penetration,nugget diameter and shear resistance of joints were mainly investigated.The research results showed that weld penetration,nugget diameter and shear resistance of joints increased with the increase of the first current and the second current.The first current mainly affected on weld penetration,while the second current mainly affected on both weld penetration and nugget diameter,especially nugget diameter.However,the third current did not affect weld penetration or nugget diameter,which mainly affected on formation of weld.Optimizing the first welding current and second welding current and their relevant parameter could improve the shear strength of arc spot welded joints.