钛型气保护药芯焊丝焊接飞溅与气孔的关系

Relation between welding spatter and porosity of titanium type gas shielded flux cored wire

采用平板堆焊工艺评定、高速摄影等试验方法,探讨了钛型气保护药芯焊丝焊接飞溅与气孔的关系。结果表明,这类焊丝的飞溅属于熔滴中气体逸出或弧气排斥所致飘离飞溅,焊接电流、电弧电压等主要参数控制的熔滴过渡形态对焊接飞溅有重要影响。焊缝中气孔(压坑)的性质主要属氢气孔(压坑),其产生机理基本遵循"熔滴过渡形态对气孔的影响理论"揭示的机理;焊接参数中,焊接电流、电弧电压对气孔(压坑)倾向影响的规律性更明显。"飞溅小与气孔倾向大"不协调的关系,实质上反映的是熔滴状态与气孔间的关系。

The relationships between of welding spatter and porosity in weld metal for titanium-type gas-shielded flux-cored wire were discussed by flat-surfacing procedure qualification,high-speed photography and other test methods.The results show that the welding spatters are belongs to the one of escaping gas from droplet or one of caused from arc air excluding droplet,and the droplet transfer forms that controlled by main parameters such as welding current,arc voltage,have a significant effect on welding spatter.The nature of weld porosity（press hole） mainly is belongs to hydrogen-induced porosity（press hole）,its generating mechanism basically follows the mechanism that is revealed by the theory about the effect of the droplet transfer shape on the porosity.The effect of welding current,arc voltage on porosity（press hole） tendency is more evident.The uncoordinated relations between about the small spatter and larger porosity tendency substantially reflect the relations between droplet shape and porosity.