Abstract—The microstructure and mechanical properties of the welded joints of 10-mm-thick rolled sheets of austenitic 04Kh20N6G11M2AFB steel with ~0.4% nitrogen, which are formed by manual arc welding using an EA-868/20 (10Kh19N23G2M5FAT) consumable-electrode, are studied. No heat-affected zone in the weld metal in the form of a zone of recrystallized grains is detected. The chemical composition of the transition layer from the base metal to the weld metal is investigated; the layer width is found to be ~200 μm. The fusion zone is characterized by the presence of (Cr,V)N and χ-phase particles and a high microhardness. The welded joint metal differs from the rolled metal in an increased yield strength (by ~60 MPa). High mechanical properties and an austenitic structure are shown be achieved in each welded joint zone when a proper welding electrode and proper welding conditions are used.

摘要— 使用 EA-868/20 (10Kh19N23G2M5FAT) 自耗电极通过手工电弧焊形成的 10 毫米厚奥氏体 04Kh20N6G11M2AFB 钢（含氮约 0.4%）的焊接接头的显微组织和机械性能为研究过。在焊缝金属中没有检测到以再结晶晶粒区域形式存在的热影响区。研究了从母材到焊缝金属过渡层的化学成分；发现层宽为~200μm。熔合区的特点是存在 (Cr,V)N 和 χ 相颗粒和高显微硬度。焊接接头金属与轧制金属的不同之处在于屈服强度增加（约 60 MPa）。