Welding wire special for Cr16Ni4-6 type stainless steel and preparation method and application of welding wire

The invention discloses a welding wire special for Cr16Ni4-6 type stainless steel and a preparation method and application of the welding wire. The invention belongs to the field of welding wires and preparation thereof. The medium-manganese high-nitrogen stainless steel welding wire comprises the following chemical components in percentage by mass: less than or equal to 0.04% of C, less than or equal to 1.0% of Si, 1.0%-3.5% of Mn, less than or equal to 0.010% of S, less than or equal to 0.010% of P, 16.5%-18.0% of Cr, 5.0%-7.0% of Ni, 0.4%-0.8% of Mo, 0.07%-0.12% of N and the balance of Fe and inevitable impurities. The welding wire provided by the invention is used for welding and repair welding of Cr16Ni5 type martensitic stainless steel or welding of Cr16Ni5 + carbon steel. Welding and repair welding are universal, the application range is wide, and the crack resistance and fatigue resistance of weld deposited metal are excellent. 一种Cr16Ni4-6型不锈钢专用焊丝及其制备方法和应用。本发明属于焊丝及其制备领域。本发明的中猛高氮不锈钢焊丝的化学成分按质量百分比表示：C≤0.