本文详细介绍了现代奥氏体-铁素体双相不锈钢的基本特性,深入探讨了这种钢的焊接性和焊缝金属及热影响区的组织变化,讨论了适用于双相不锈钢的焊接工艺方法,系统论述了各种焊接材料的选配和焊接工艺细则,列举了典型工程应用实例。 In this paper, the basic characteristics of modern austenite-ferritic duplex stainless steel are introduced in detail. The weldability of the steel and the microstructures of the weld metal and heat-affected zone are discussed in depth. The welding process suitable for duplex stainless steel Method and system, discusses the matching of welding materials and welding process details, and lists examples of typical engineering applications.