Abstract Three nitrogen-rich welding wires with nitrogen content of 0.15 %, 0.6 % and 0.9 % for high nitrogen stainless steel welding were developed by a modified Schaeffler diagram and equilibrium phase diagram calculation. The effect of the chemical compositions especially the nitrogen on the weld defects, element distribution, microstructure, mechanical properties and droplet transfer were studied to evaluate the performance of the welding wires. Nitrogen element in the droplets of nitrogen-rich welding wires was partially lost due to the escape of nitrogen during the welding process, so nitrogen in the welding materials was not completely transported to the weld as designed, resulting in a deviation of actual weld from the design. The joint of the welding wire with 0.6 % nitrogen content had the highest mechanical properties, the tensile strength reached 912.5 MPa, and the impact energy of the weld reached 138.17 J. Full-austenite weld was only obtained in the weld of the wire with 0.15 % nitrogen content, but the tensile strength of the joint was lowest because of the low nitrogen content in the weld. Welding wire with 0.9 % nitrogen content had the most serious nitrogen loss, a few of pores were found in the weld. Moreover, the content of skeleton ferrite in the weld with the welding wire containing 0.9 % nitrogen content was high, resulting in the decrease of the weld impact energy.

中文翻译：

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高氮不锈钢富氮焊丝的设计与评价

摘要 通过改进的舍弗勒图和平衡相图计算，研制了三种用于高氮不锈钢焊接的含氮量分别为0.15%、0.6%和0.9%的富氮焊丝。研究了化学成分尤其是氮对焊缝缺陷、元素分布、显微组织、力学性能和熔滴转移的影响，以评估焊丝的性能。富氮焊丝熔滴中的氮元素因焊接过程中氮的逸出而部分流失，导致焊材中的氮没有按设计完全输送到焊缝，导致实际焊缝与焊缝的偏差。设计。含氮量为 0.6% 的焊丝接头具有最高的机械性能，抗拉强度达到912.5 MPa，焊缝冲击功达到138.17 J。仅在含氮量为0.15%的焊丝焊缝处获得全奥氏体焊缝，但接头抗拉强度最低，因焊缝中的氮含量。含氮量为 0.9% 的焊丝氮损失最严重，焊缝中发现少量气孔。此外，含氮量为0.9%的焊丝焊缝中骨架铁素体含量高，导致焊缝冲击功降低。9%氮含量的氮损失最严重，在焊缝中发现了一些气孔。此外，含氮量为0.9%的焊丝焊缝中骨架铁素体含量高，导致焊缝冲击功降低。9%氮含量的氮损失最严重，在焊缝中发现了一些气孔。此外，含氮量为0.9%的焊丝焊缝中骨架铁素体含量高，导致焊缝冲击功降低。