GMAW-P工艺参数对TCS345不锈钢焊接接头缺口冲击韧度的影响

Effect of GMAW-P parameters on notched impact strength of welding joint in TCS345 stainless steel

以TCS345铁素体不锈钢名义熔合线处的缺口冲击韧度为研究对象,采用一次回归正交试验,考察脉冲熔化极气体保护焊(pulse gas metal arc welding简称GMAW-P)脉冲工艺参数对名义熔合线处缺口冲击韧度的影响,分析脉冲电流、脉冲时间、脉冲频率、焊接速度及其交互作用对焊接接头名义熔合线缺口冲击韧度的影响规律.结果表明,TCS不锈钢焊接热影响区的组织为铁素体+马氏体.运用MATLAB优化函数对焊接工艺参数进行优化,优化结果为脉冲电流450A、脉冲时间2.3ms、脉冲频率250Hz、焊接速度500mm/min.

The effect of pulse gas metal arc welding (GMAW-P) parameters on impact tonghness of welding joint nominal fusion line in TCS345 stainless steel were investigated through orthogonal experiments. The influencing factors such as pulse current,time,frequency and welding speed were considered. The result shows that the microstructure in heat affected zone (HAZ) of TCS345 stainless steel composed of ferrite and martensite. Optimization of GMAW-P process parameters was carried out by the software of MATLAB,that is,pulse current 450 A,pulse time 2.3 ms,pulse frequency 250 Hz,and welding speed 500 mm/min.