摘要
以静音钢板为研究对象,基于实车装配需求对静音钢板的CO_2气体保护焊接工艺进行研究和改善。通过对不同组合焊接试样接头拉伸强度及硬度和组织的检测,进行预加焊点新工艺的可行性验证,对比分析焊接工艺改进前后接头强度及断裂模式的差异。结果表明,静音钢板的结构特性是导致可焊性差和接头强度稳定性差的主要原因;通过对静音钢板预加焊点新工艺的对策验证,有效提升了静音钢板CO_2气体保护焊的有效性,改善了静音钢板底层焊接性能不良的问题,减少了接头焊接不良问题发生概率。
In this paper,the CO2 arc welding ability of quiet steel has been studied,based on the requirement of assembly. Through the detection of mechanical and metallographic structure in different forms,the research reveals the welding feasibility of preresistance spot welding by comparison of joint strength and fracture mode between the primary process and improved process. The resuhs show that the structure characteristic is the main factor to induce the weakness of the welding ability and poor stability of joint strength. The strategy of pre-resistance spot welding on the quiet steel improves the availability of CO2 arc wehling process and reduces the probability of the occurrence of unfavorable welding.
出处
《电焊机》
2016年第12期75-79,共5页
Electric Welding Machine
