摘要
研究不同的焊接工艺对高强度双相钢电阻点焊焊接质量和焊点裂纹缺陷的影响。结果表明,增加焊后回火脉冲,能够改善焊点表面边部裂纹;增加预热脉冲或回火脉冲,能够明显提升焊点的抗剪性能;同时增加预热脉冲和回火脉冲,能够改善或消除焊缝区的软化点。
The effect of different welding process on welding spot properties and crack defeets of high strength dual phase steel were studied. The resuhs show that the crack in the edge of welds surface can be improved significantly by adding tempering current after welding. The tensile-shear properties of the welding spots can be significantly improved hy adding preheating current or tempering eurrent. There is a softening zone in weld zone, which can be improved or eliminated by adding both preheating current and tempering current.
出处
《电焊机》
2016年第6期96-100,共5页
Electric Welding Machine
关键词
焊接工艺
高强钢
点焊
裂纹缺陷
welding process
high strength steel
spot welding
crack defects
