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对双相不锈钢S31803埋弧焊焊接接头组织和性能进行了测试分析。结果表明:该钢对热裂纹、冷裂的敏感性小,最突出的问题是保证其焊接接头的相比例,减少金属间相的产生;埋弧焊时,采用合适的焊接线能量,并控制层温,焊缝组织状态为奥氏体+44%～46%铁素体+少量第三相,热影响区组织为奥氏体+46%～47%铁素体+少量第三相,保证了焊接接头的力学性能和耐蚀性能。
The microstructure and properties of the duplex stainless steel S31803 submerged arc welded joint were tested and analyzed. The results show that the steel is less susceptible to hot cracking and cold cracking. The most prominent problem is to ensure the phase ratio of the welded joints and reduce the intermetallic phase. When submerged arc welding is adopted, proper welding wire energy is adopted and controlled Layer temperature, the weld microstructure of austenite + 44% ~ 46% ferrite + a small amount of the third phase, heat affected zone organization of austenite + 46% ~ 47% ferrite + a small amount of the third phase, to ensure Welded joints of the mechanical properties and corrosion resistance.