固溶处理对异种不锈钢焊接接头组织和性能的影响
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摘要
采用搅拌摩擦焊对304/430不锈钢交错对接接头进行了焊接,分析了固溶处理对焊接接头的组织和力学性能的影响。结果表明:随着固溶温度升高,基体中第二相粒子逐渐溶解,晶粒长大明显,接头抗拉强度和伸长率总体呈降低趋势。固溶温度为800℃时,第二相粒子部分溶解,接头组织发生回复和再结晶,晶粒细小,接头抗拉强度和伸长率最大,和热处理前接头对比,力学性能有较大改善,接头断裂于430不锈钢侧,具有韧性断裂特征。
Friction stir welding(FSW) was used to weld 304/430 stainless steel staggered butt joint. The effect of solution treatment on microstructure and mechanical properties of the welded joints was analyzed. The results show that with the increase of solid solution temperature, the second phase particles in the matrix gradually dissolve, the grain growth is obvious, and the tensile strength and elongation of the welded joints decrease as a whole. When the solid solution temperature is 800 ℃, the second phase particles are partially dissolved, the microstructure of the welded joints is recovered and recrystallized, the grain size is fine, the tensile strength and elongation of the welded joints are the highest. Compared with the welded joints before heat treatment, the mechanical properties of the welded joints are improved greatly. The welded joints are fractured on the side of 430 stainless steel and has the characteristics of ductile fracture.
Friction stir welding(FSW) was used to weld 304/430 stainless steel staggered butt joint. The effect of solution treatment on microstructure and mechanical properties of the welded joints was analyzed. The results show that with the increase of solid solution temperature, the second phase particles in the matrix gradually dissolve, the grain growth is obvious, and the tensile strength and elongation of the welded joints decrease as a whole. When the solid solution temperature is 800 ℃, the second phase particles are partially dissolved, the microstructure of the welded joints is recovered and recrystallized, the grain size is fine, the tensile strength and elongation of the welded joints are the highest. Compared with the welded joints before heat treatment, the mechanical properties of the welded joints are improved greatly. The welded joints are fractured on the side of 430 stainless steel and has the characteristics of ductile fracture.
引文
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[14] 薛小怀,李郅远,王志颖,等.焊后热处理对CAP1400蒸发器压力边界焊缝不锈钢隔离层组织和性能的影响[J].材料热处理学报,2018,39(2):108-112.XUE Xiao-huai,LI Zhi-yuan,WANG Zhi-ying,et al.Effect of postweld heat treatment on microstructure and properties of stainless steel surfacing layer of CAP1400 evaporator pressure boundary weld[J].Transactions of Materials and Heat Treatment,2018,39(2):108-112.
[15] 顾佳磊,张文杨,丁阳.焊后热处理对309L不锈钢焊缝金属性能的影响[J].压力容器,2017,34(7):5-10.GU Jia-lei,ZHANG Wen-yang,DING Yang.Influence of post-weld heat treatment on mechanical properties in 309L stainless steel weld metals[J].Pressure Vessel Technology,2017,34(7):5-10.
[16] 李艺君,杜东旭,付瑞东.焊后热处理对高氮奥氏体不锈钢搅拌摩擦焊接头组织及性能的影响[J].机械工程学报,2015,51(22):47-53.LI Yi-jun,DU Dong-xu,FU Rui-dong.Effect of post-welded heat treatment on the microstructures and mechanical properties of friction stir welded joint of high-nitrogen austenitic stainless steel[J].Journal of Mechanical Engineering,2015,51(22):47-53.
[2] 杨文平,闫志峰,王文先,等.443铁素体不锈钢随焊激冷焊接接头的组织性能[J].材料热处理学报,2012,33(10):96-100.YANG Wen-ping,YAN Zhi-feng,WANG Wen-xian,et al.Microstructure and properties of welded joints with trailing intense cooling for 443 ferritic stainless steel[J].Transactions of Materials and Heat Treatment,2012,33(10):96-100.
[3] Berretta J R,Rossi D W,Neves D M D M,et al.Pulsed Nd:YAG laser welding of AISI 304 to AISI 420 stainless steels[J].Optics and Lasers in Engineering,2007,45(9):960-966.
[4] Wang H T,Wang G Z,Xuan F Z,et al.An experimental investigation of local fracture resistance and crack growth paths in a dissimilar metal welded joint[J].Materials and Design,2013,44:179-189.
[5] 郭国林,王志国,杨君翼,等.异种不锈钢搅拌摩擦焊对接接头组织和力学性能[J].热加工工艺,2017,46(21):61-63+67.GUO Guo-lin,WANG Zhi-guo,YANG Jun-yi,et al.Microstructure and mechanical properties of friction stir welded butt joints of dissimilar stainless steel[J].Hot Working Technology,2017,46(21):61-63+67.
[6] Thomas W M,Nicholas E D,Needham J C,et al.Friction Stir Butt Welding:GB,9125978.8[P].1991.
[7] 张成玉,戴晟,余海洲,等.热处理对316L不锈钢组织和性能的影响[J].南方金属,2007(1):31-34.ZHANG Cheng-yu,DAI Sheng,YU Hai-zhou,et al.Influence of heat treatment on the microstructure and properties of 316L stainless steel[J].Southern Metals,2007(1):31-34.
[8] 李学峰,李正邦,郭海生,等.固溶温度对00Cr21Mn5NilN节镍型双相不锈钢组织和性能的影响[J].钢铁研究学报,2007,19(10):44-47.LI Xue-feng,LI Zheng-bang,GUO Hai-sheng,et al.Influence of solution temperature on structure and properties of Ni-Free type dual stainless steel 00Cr21Mn5Ni1N[J].Journal of Iron and Steel Research,2007,19(10):44-47.
[9] 郭国林,刘鹏,杨莉,等.热处理对304不锈钢板激光焊接接头组织和力学性能的影响[J].热加工工艺,2016,45(21):194-196.GUO Guo-lin,LIU Peng,YANG Li,et al.Effect of heat treatment on microstructure and mechanical properties of laser welded joint of 304 stainless steel plate[J].Hot Working Technology,2016,45(21):194-196.
[10] 王志民,刘光明,吴世强,等.热处理对S30432喷丸不锈钢抗高温水蒸汽氧化性能的影响[J].材料热处理学报,2019,40(2):124-132.WANG Zhi-min,LIU Guang-ming,WU Shi-qiang,et al.Effect of heat treatment on high temperature steam oxidation resistance of shot blasted S30432 stainless steel[J].Transactions of Materials and Heat Treatment,2019,40(2):124-132.
[11] 丁海峰,杨吉春,张春香,等.固溶处理对304L不锈钢晶粒长大及力学性能的影响[J].材料热处理报,2016,37(8):102-107.DING Hai-feng,YANG Ji-chun,ZHANG Chun-xiang,et al.Effect of solution treatment on grain growth and mechanical properties of 304L stainless steel[J].Transactions of Materials and Heat Treatment,2016,37(8):102-107.
[12] Yang Y H,Yan B,Wang J,et al.The influence of solution treatment temperature on microstructure and corrosion behavior of high temperature ageing in 25% Cr duplex stainless steel[J].Journal of Alloys and Compounds,2011,509(36):8870-8879.
[13] Xu L X,Wu H B.Microstructural evolution and mechanical property optimization under solution treatment of an ultra-low carbon Fe-Mn-Al duplex steel[J].Materials Science and Engineering A,2018,738:163-173.
[14] 薛小怀,李郅远,王志颖,等.焊后热处理对CAP1400蒸发器压力边界焊缝不锈钢隔离层组织和性能的影响[J].材料热处理学报,2018,39(2):108-112.XUE Xiao-huai,LI Zhi-yuan,WANG Zhi-ying,et al.Effect of postweld heat treatment on microstructure and properties of stainless steel surfacing layer of CAP1400 evaporator pressure boundary weld[J].Transactions of Materials and Heat Treatment,2018,39(2):108-112.
[15] 顾佳磊,张文杨,丁阳.焊后热处理对309L不锈钢焊缝金属性能的影响[J].压力容器,2017,34(7):5-10.GU Jia-lei,ZHANG Wen-yang,DING Yang.Influence of post-weld heat treatment on mechanical properties in 309L stainless steel weld metals[J].Pressure Vessel Technology,2017,34(7):5-10.
[16] 李艺君,杜东旭,付瑞东.焊后热处理对高氮奥氏体不锈钢搅拌摩擦焊接头组织及性能的影响[J].机械工程学报,2015,51(22):47-53.LI Yi-jun,DU Dong-xu,FU Rui-dong.Effect of post-welded heat treatment on the microstructures and mechanical properties of friction stir welded joint of high-nitrogen austenitic stainless steel[J].Journal of Mechanical Engineering,2015,51(22):47-53.