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对集鱼灯焊接结构进行了改进设计。以结构改进后的集鱼灯焊接接头为研究对象,运用SYSWELD软件对焊接接头的焊接温度场进行了数值模拟,得到的焊接接头温度场与实际生产相符。使用优化的工艺参数对集鱼灯进行脉冲MAG焊接,研究结构改进后集鱼灯焊接接头的焊缝成形、微观组织、显微硬度和耐海水腐蚀性能等进行了研究。结果表明:使用优化的参数进行焊接得到的焊缝成形较好。焊缝组织为奥氏体和铁素体双相组织,焊缝与316L母材的主要合金元素含量相差不大,焊缝的硬度最高,其最大值为227 HV,而母材的硬度最低,其最小值为189 HV。将焊接接头在3.5%的NaCl水溶液中进行腐蚀,得到焊缝的腐蚀速率为0.1814 mm/a,母材的腐蚀速率为0.1767 mm/a。
The design of the welding structure of the fishing lantern was improved. With the improved structure of the fish-tail welded joint as the research object, the welding temperature field of the welded joint was simulated by using SYSWELD software. The obtained welded joint temperature field is consistent with the actual production. The optimized process parameters were used to pulsed MAG welding of fish lamps to study the weld formation, microstructure, microhardness and seawater corrosion resistance of fish-fish welded joints after structural improvement. The results show that the welding seam obtained by using the optimized parameters is better formed. Weld microstructure of austenite and ferrite duplex microstructure, weld and 316L base metal alloy elements of the main or less the same, the highest hardness of the weld, the maximum value of 227 HV, while the lowest hardness of the base metal, The minimum is 189 HV. Corrosion of the welded joint in 3.5% NaCl aqueous solution resulted in a corrosion rate of 0.1814 mm / a for the weld and 0.1767 mm / a for the base metal.