An austenitic metal-cored wire (diameter – 1.6 mm) with additional nitrogen alloying (0.25–0.40 wt.%) was developed for this study. Mechanical tests and metallographic studies of the deposited metal and welded joints made with austenitic metal-cored wire (composition – Cr20Mn5Ni4Mo2.5Cu3N0.3) were conducted. It was found that the values of σ_u and σ_0.2 of the deposited metal obtained by using the developed wire were 20 to 30% higher compared to the utilized electrode materials, while the ductility characteristics were preserved (δ = 43%). It was shown that the use of metal-cored wire (Cr20Mn5Ni4Mo2.5Cu3N0.3) for welding of high-strength steel 20HGSNM (EN 1.6523) makes it possible to obtain defect-free welded joints with austenitic-ferritic structure, which have 20% higher strength characteristics compared to the analogues.

本研究开发了一种添加氮合金（0.25-0.40 wt.%）的奥氏体金属芯线（直径 – 1.6 毫米）。对奥氏体金属药芯焊丝（成分 – Cr20Mn5Ni4Mo2.5Cu3N0.3）的熔敷金属和焊接接头进行了机械测试和金相研究。结果发现，使用所开发的焊丝获得的熔敷金属的σ _u和σ _0.2值比所使用的电极材料高20％至30％，同时保留了延展性特性（δ = 43％）。结果表明，使用金属药芯焊丝（Cr20Mn5Ni4Mo2.5Cu3N0.3）焊接高强度钢20HGSNM（EN 1.6523）可以获得奥氏体-铁素体组织的无缺陷焊接接头，其缺陷率达到20%与类似物相比具有更高的强度特性。