UNS S32750超级双相不锈钢的CMT+P焊接工艺  

CMT+P welding process of UNS S32750 super duplex stainless steel

作　　者：张志强 白玉洁 徐连勇[2] 韩永典[2] 荆洪阳[2] ZHANG Zhi-qiang;BAI Yu-jie;XU Lian-yong;HAN Yong-dian;JING Hong-yang(College of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China;School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]中国民航大学航空工程学院,天津300300 [2]天津大学材料科学与工程学院,天津300350

出　　处：《材料热处理学报》2022年第11期197-206,共10页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51905536);航空科学基金(2020Z049067002);天津市教委科研计划项目(2020KJ020);中国民航大学实验技术创新基金(2021CXJJ84)。

摘　　要：综合考虑UNS S32750超级双相不锈钢冷金属过渡与脉冲(CMT+P)单道焊缝的宏观形貌、成形系数及铁素体/奥氏体两相比例等因素,探究了保护气类型、焊接速度、送丝速度及CMT/P比值等工艺参数对焊缝成形质量的影响规律。结果表明:UNS S32750超级双相不锈钢最优的CMT+P单道焊接工艺参数为:Ar保护气(流量15 L/min)、焊接速度为3~5 mm/s、送丝速度为8 m/min、CMT/P比值为1/32~1/64。以优化的单道焊接工艺参数范围为指导,成功制备了成形质量良好的UNS S32750双相不锈钢CMT+P对焊接头。Comprehensively considering the macro morphology, forming coefficient and ferrite/austenite ratio of cold metal transfer and pulse(CMT+P) single-pass weld of UNS S32750 super duplex stainless steel, the effects of process parameters such as type of shielding gas, welding speed, wire feeding speed and CMT/P ratio on weld joint forming quality were investigated. The results show that the optimal CMT+P single-pass welding parameters of the UNS S32750 super duplex stainless steel are as follows: Ar shielding gas(flow rate of 15 L/min), welding speed of 3-5 mm/s, wire feeding speed of 8 m/min, and CMT/P ratio of 1/32-1/64. Based on the optimized range of single-pass welding parameters, the UNS S32750 duplex stainless steel CMT/P butt-welded joint with good forming quality is successfully prepared.

关 键 词：双相不锈钢 CMT+P 焊接工艺参数 焊缝成形 

分 类 号：TG444[金属学及工艺—焊接]