短时间焊后热处理对S32101双相不锈钢板激光焊焊缝组织和性能的影响
Effect of Short Time Post-Weld Heat Treatment on Microstructure and Properties of S32101 Duplex Stainless Steel Plate Laser Welding
摘 要
对厚度为6.5 mm的S32101双相不锈钢板进行激光焊接,并进行不同温度(800~1 100 ℃)和不同保温时间(0~180 s)的焊后热处理,研究了焊后热处理对焊缝显微组织和性能的影响。结果表明:热处理后焊缝中奥氏体含量高于焊态焊缝,并且其含量随保温时间的延长整体呈增大的趋势,随热处理温度的升高整体呈先增大后减小的趋势;在1 000~1 100 ℃下保温0~180 s后焊缝中的奥氏体体积分数均超过30%,热处理温度为1 075 ℃时奥氏体体积分数最高;热处理后焊缝的平均显微硬度低于焊态焊缝,与母材相近;在热处理温度为1 075 ℃,保温时间为0下,焊缝的自腐蚀电位与焊态焊缝相近,当保温时间延长至180 s时,自腐蚀电位提高,腐蚀倾向降低。
激光焊
热处理
显微硬度
耐腐蚀性能
S32101 duplex stainless steel
laser welding
heat treatment
microhardness
corrosion resistance
Abstract
S32101 duplex stainless steel plate with a thickness of 6.5 mm was welded by laser welding. The post-weld heat treatment at different temperatures (800-1 100 ℃) and different holding time (0-180 s) was carried out. The effects of post-weld heat treatment on the microstructure and properties of the weld were studied. The results show that the austenite content in the weld after heat treatment was higher than that of as-welded weld, its content increased with the extension of holding time, and increased first and then decreased with the increase of heat treatment temperature. The austenite volume fraction was more than 30% after the weld was held at 1 000-1 100 ℃ for 0-180 s, and the austenite volume fraction was the highest when the heat treatment temperature was 1 075 ℃. The average microhardness of the weld after heat treatment was lower than that of the as-welded weld and similar to that of the base metal. When the heat treatment temperature was 1 075 ℃,and the holding time was 0, the free-corrosion potential of the weld was similar to that of the as-welded weld. When the holding time was extended to 180 s, the free-corrosion potential increased, and the corrosion tendency decreased.
中图分类号 TG161 DOI 10.11973/jxgccl202307011
所属栏目 材料性能及应用
基金项目 苏州大学第二十四批大学生课外学术科研基金资助项目(KY20220096A);苏州大学优秀青年学者学术启动经费资助项目(NH14400222)
收稿日期 2022/5/5
修改稿日期 2023/5/16
网络出版日期
作者单位点击查看
联系人作者沈鑫珺
备注王保军(1997-),男,江苏连云港人,硕士研究生
引用该论文: WANG Baojun,BAI Lu,CHEN Long,SHEN Xinjun. Effect of Short Time Post-Weld Heat Treatment on Microstructure and Properties of S32101 Duplex Stainless Steel Plate Laser Welding[J]. Materials for mechancial engineering, 2023, 47(7): 67～71
王保军,白露,陈龙,沈鑫珺. 短时间焊后热处理对S32101双相不锈钢板激光焊焊缝组织和性能的影响[J]. 机械工程材料, 2023, 47(7): 67～71
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【3】DA CRUZ JUNIOR E J,GALLEGO J,SETTIMI A G,et al.Influence of nickel on the microstructure,mechanical properties,and corrosion resistance of laser-welded super-duplex stainless steel[J].Journal of Materials Engineering and Performance,2021,30(4):3024-3032.
【4】BAGHDADCHI A,HOSSEINI V A,HURTIG K,et al.Promoting austenite formation in laser welding of duplex stainless steel:Impact of shielding gas and laser reheating[J].Welding in the World,2021,65(3):499-511.
【5】汪海涛,毕宗岳,刘玉栋,等.S32205双相不锈钢激光焊接头性能分析[J].应用激光,2020,40(1):56-61. WANG H T,BI Z Y,LIU Y D,et al.Performance analysis of duplex stainless steel laser welding joint[J].Applied Laser,2020,40(1):56-61.
【6】李添祺,张莹莹,高磊,等.固溶处理对2205双相不锈钢FCAW接头组织及力学性能的影响[J].焊接,2019(5):44-47. LI T Q,ZHANG Y Y,GAO L,et al.Effect of solution treatment on microstructure and mechanical properties of 2205 duplex stainless steels joint by FCAW[J].Welding & Joining,2019(5):44-47.
【7】SARAVANAN S,RAGHUKANDAN K,SIVAGURUMANIKANDAN N.Pulsed Nd\:YAG laser welding and subsequent post-weld heat treatment on super duplex stainless steel[J].Journal of Manufacturing Processes,2017,25:284-289.
【8】YANG Y Z,WANG Z Y,TAN H,et al.Effect of a brief post-weld heat treatment on the microstructure evolution and pitting corrosion of laser beam welded UNS S31803 duplex stainless steel[J].Corrosion Science,2012,65:472-480.
【9】王维东,毕宗岳,鲜林云,等.固溶处理对DSS2205激光焊焊缝性能的影响[J].金属热处理,2020,45(12):114-119. WANG W D,BI Z Y,XIAN L Y,et al.Effect of solution treatment on properties of DSS2205 laser weld seam[J].Heat Treatment of Metals,2020,45(12):114-119.
【10】张志强,荆洪阳,徐连勇,等.铁素体/奥氏体双相不锈钢焊接接头组织和性能的研究进展[J].材料热处理学报,2020,41(5):13-27. ZHANG Z Q,JING H Y,XU L Y,et al.Research progress on microstructure and properties of welded joint of ferrite/austenite duplex stainless steel[J].Transactions of Materials and Heat Treatment,2020,41(5):13-27.
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【14】EGHLIMI A,SHAMANIAN M,RAEISSI K.Effect of current type on microstructure and corrosion resistance of super duplex stainless steel claddings produced by the gas tungsten arc welding process[J].Surface and Coatings Technology,2014,244:45-51.
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【17】龚利华,李洋.固溶处理对节镍型LDX2101及00Cr22Ni5Mo3N双相不锈钢腐蚀行为的影响[J].上海金属,2022,44(1):22-27. GONG L H,LI Y.Effect of solution treatment on corrosion behavior of nickel-saving LDX2101 and 00Cr22Ni5Mo3N duplex stainless steels[J].Shanghai Metals,2022,44(1):22-27.
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