固溶处理对多股绞丝焊接S32205双相不锈钢焊接接头组织及性能的影响  

Effect of solution treatment on microstructure and properties of welded joint of S32205 duplex stainless steel with multi-stranded wires

作　　者：陈泽方 彭康 陈希章[1] 王琪晨 Chen Zefang;Peng Kang;Chen Xizhang;Wang Qichen(School of Mechanical and Electrical Engineering,Wenzhou University,Wenzhou Zhejiang 325035,China;CIMC Offshore Engineering Institute Limited Company,Yantai Shandong 264000,China)

机构地区：[1]温州大学机电工程学院,浙江温州325035 [2]烟台中集海洋工程研究院,山东烟台264000

出　　处：《金属热处理》2023年第11期120-126,共7页Heat Treatment of Metals

基　　金：国家自然科学基金(51975419)。

摘　　要：针对多股绞丝焊接的S32205双相不锈钢焊接接头,进行1080℃固溶处理。采用电子背散射衍射、扫描电镜、电子万能试验机以及电化学试验等手段,对比分析了固溶处理对焊接接头显微组织、力学性能以及耐点蚀性能的影响。结果表明,经过1080℃固溶处理,焊接接头主要合金元素得到充分扩散,组织更均匀,焊缝奥氏体体积分数增加11.2%,两相比例更均衡;焊接接头的平均抗拉强度提高了32.7 MPa,塑性略有改善,同时焊接接头的耐点蚀性能也有明显的提高。Solution treatment was performed at 1080℃for S32205 duplex stainless steel welded joint welded with multi-stranded wire,and the effect of which on microstructure,mechanical properties and pitting corrosion resistance of the welded joint was analyzed by means of electronic backscatter diffraction,scanning electron microscope,electronic universal test machine and electrochemical test.The results show that after solution treatment at 1080℃,the main alloying elements of the welded joint are fully diffused,the microstructure is more uniform,the austenite volume fraction of the weld is increased by 11.2%,and the ratio of ferrite and austenite is more balanced.After the solution treatment,the average tensile strength of the welded joints increases by 32.7 MPa,the plasticity improves slightly,and at the same time,the pitting corrosion resistance of the welded joints is significantly improved.

关 键 词：固溶处理 S32205双相不锈钢 焊接接头 力学性能 耐点蚀性能 

分 类 号：TG156.94[金属学及工艺—热处理] TG457.11[金属学及工艺—金属学]