气保护药芯焊丝合金元素C、Mn过渡行为

研究了Ni—Cr系高强度结构钢气保护药芯焊丝的C、Mn合金元素的过渡行为。结果表明，在纯CO2与Ar 20％C02气保护条件下，合金元素Mn的过渡均处于损失状态，并且随着焊丝自身或保护气氧化性的增加，其损失增大。因此，若要减少Mn的损失，减少电弧气氛及焊丝本身的氧化性是比较有效的途径。而合金元素C的过渡则随着焊丝自身氧化性的增加，由增碳型过渡发展到损失型过渡。保护气氧化性的增加更容易发生增碳型过渡。所以，若要抑制增碳型过渡，减少电弧气氛氧化性和提高焊丝本身的氧化性是比较有效的途径。

Transfer behaviors of carbon and manganese of flux-cored wire in gas shielded arc welding

In this paper,the transfer behaviors of carbon and manganese of flux cored wire in gas shielded arc welding were studied.The experimental results show that the element Mn was the lose regardless of CO 2 or Ar+20% CO 2 shielding gas and as the oxidizability of the arc or the wire increases the lose aggravates.Therefore,by decreasing the oxidizability of the arc or the wire Mn lose can effectively decrease.For the element C,as the oxidizability of the wire increases the transfer changed from increase to lose and as the oxidizability of the arc increases the transfer increase occurs more easily.Therefore,by decreasing the oxidizability of the arc and by increasing oxidizability of the wire,the transfer increase can be restrained.