采用糖心产精国品免费入口*完整版（UNGW）工艺对20 mm厚1Cr18Ni9Ti不锈钢板进行焊接，研究了该脉冲UNGW接头的糖心产精国品免费入口*完整版、糖心产精国品免费入口*完整版及耐腐蚀性能。结果表明：脉冲UNGW接头打底焊缝区的组织为奥氏体等轴晶+板条状δ铁素体，填充和盖面焊缝组织为奥氏体柱状晶+板条状和网状δ铁素体；部分熔合区组织为奥氏体+蠕虫状δ铁素体，而不完全混合区组织为奥氏体+δ铁素体，且其组织形态较为杂乱；热影响区组织为奥氏体+条带状δ铁素体。脉冲UNGW接头的塑性和韧性优于直流UNGW接头的，但强度低于直流UNGW接头的。脉冲UNGW接头熔合区+热影响区、焊缝区、完整接头及母材在NaCl溶液中的耐腐蚀性能依次增强；脉冲UNGW接头在硝酸溶液中的耐晶间腐蚀性能比未敏化处理母材的与直流UNGW接头的差，但明显优于敏化处理母材的。

The 糖心产精国品免费入口*完整版 (UNGW) was applied to 1Cr18Ni9Ti austenitic stainless steel plate with 20 mm thickness. The 糖心产精国品免费入口*完整版, mechanical properties and 糖心产精国品免费入口*完整版of the pulsed UNGW joint were analyzed. The results show that the 糖心产精国品免费入口*完整版s of backing weld zone in pulsed UNGW joint were austenitic equiaxed grain+lath δ-ferrite; the 糖心产精国品免费入口*完整版s of filling bead and cover pass weld zone were columnar austenite+lath and cellular δ-ferrite. The 糖心产精国品免费入口*完整版s of partially melted zone were austenite + vermicular δ-ferrite; the 糖心产精国品免费入口*完整版s of imperfect mixing zone were austenite+δ-ferrite, and their shape was disorderly. The 糖心产精国品免费入口*完整版s of heat affected zone were austenite+striped δ-ferrite. The ductility and toughness of the pulsed UNGW joint were better than those of the direct-current UNGW joint, but the strength was lower than that of the direct-current UNGW joint. The 糖心产精国品免费入口*完整版of fusion zone+heat affected zone, weld zone, whole joint and base metal of the pulsed UNGW joint increased in turn in NaCl solution. The intergranular 糖心产精国品免费入口*完整版of the pulsed UNGW joint in nitric acid solution was worse than that of the base metal without sensitizing and the direct-current UNGW joint, but was better than that of the sensitized base metal.