Microstructure and Mechanical Properties of SUS316L/15CrMo Dissimilar SteelJoint by TIG Welding with Different Welding Wires
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摘要: 分别采用ERNiCrMo-3镍基合金焊丝和ER309不锈钢焊丝,通过钨极惰性气体保护(TIG)焊工艺对SUS316L不锈钢和15CrMo低合金钢进行异种钢焊接,对比研究了2种焊接接头的显微组织和力学性能。结果表明:采用ERNiCrMo-3与ER309焊丝所得焊缝的凝固模式分别为奥氏体与奥氏体-铁素体凝固模式,凝固组织分别为完全奥氏体组织与奥氏体-铁素体混合组织;相较于ER309焊丝,使用ERNiCrMo-3焊丝可以抑制15CrMo钢侧焊接过程中的碳元素扩散,获得具有更高抗拉强度和断后伸长率的焊接接头;2种焊接接头的峰值硬度均出现在15CrMo钢侧的粗晶热影响区,采用ERNiCrMo-3焊丝所得焊缝因存在Laves相,硬度比采用ER309焊丝时高出30 HV左右。Abstract: Dissimilar steel welding was carried out on SUS316L stainless steel and 15CrMo low-alloy steel by tungsten inert gas (TIG) welding with nickel base alloy welding wire ERNiCrMo-3 and stainless steel welding wire ER309. The microstructure and mechanical properties of the two welded joints were studied and compared. The results show that the solidification modes of the welds obtained with ERNiCrMo-3 and ER309 welding wires were austenitic and austenite-ferrite solidification modes, respectively, and the solidification structures were complete austenitic and mixed austenite-ferrite structures, respectively. Compared with using ER309 welding wire, using ERNiCrMo-3 welding wire could inhibit the diffusion of carbon in the welding process on 15CrMo steel side, and obtain a welded joint with higher tensile strength and percentage elongation after fracture. The peak hardness of the two welded joints appeared in the coarse-grained heat affected zone on 15CrMo steel side. Due to Laves phase in the weld obtained with ERNiCrMo-3 welding wire, the hardness was about 30 HV higher than that with ER309 welding wire.
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[1] HUANG B S,YANG J,LU D H,et al.Study on the microstructure,mechanical properties and corrosion behaviour of S355JR/316L dissimilar welded joint prepared by gas tungsten arc welding multi-pass welding process[J].Science and Technology of Welding and Joining,2016,21(5):381-388.
[2] 陈今良.0Cr18Ni9奥氏体不锈钢与Q235碳钢异种金属焊接接头的组织与性能[J].塑性工程学报,2019,26(3):179-184. CHEN J L.Microstructure and properties of 0Cr18Ni9 austenitic stainless steel and Q235 carbon steel dissimilar metal welded joint[J].Journal of Plasticity Engineering,2019,26(3):179-184.
[3] DAK G,PANDEY C.A critical review on dissimilar welds joint between martensitic and austenitic steel for power plant application[J].Journal of Manufacturing Processes,2020,58:377-406.
[4] 胡效东,戚振,吕建涛,等.15CrMoR钢多层焊缝的组织和力学性能[J].金属热处理,2014,39(10):131-136. HU X D,QI Z,LYU J T,et al.Microstructure and mechanical properties of 15CrMoR multi-layer welding seam[J].Heat Treatment of Metals,2014,39(10):131-136.
[5] 冯琳杰,吕品正,赵永明,等.15CrMo钢多层堆焊过程中热影响区的组织演化行为及其对接头硬度的影响[J].热加工工艺,2021,50(11):67-70. FENG L J,LYU P Z,ZHAO Y M,et al.Microstructure evolution of heat affected zone of 15CrMo steel during multi-layer welding and its influence on hardness distribution of welded joint[J].Hot Working Technology,2021,50(11):67-70.
[6] 杨永磊,李海强,魏军.镍基焊条在A335-P12与TP304异种钢的焊接实践[J].石油和化工设备,2012,15(8):41-42. YANG Y L,LI H Q,WEI J.Welding practice of nickel-based covered electrode in A335-P12 and TP304 dissimilar steels[J].Petro & Chemical Equipment,2012,15(8):41-42.
[7] 黄本生,刘阁,黄龙鹏,等.不同焊材匹配与时效处理对异种钢焊接接头显微结构与力学性能的影响[J].材料工程,2013,41(8):75-84. HUANG B S,LIU G,HUANG L P,et al.Effect of different welding material matching and aging treatment on microstructure and mechanical properties of dissimilar steel welded joints[J].Journal of Materials Engineering,2013,41(8):75-84.
[8] 单新华.15CrMoR与06Cr19Ni10异种钢焊接[J].石油和化工设备,2017,20(12):36-40. SHAN X H.Welding of 15CrMoR and 06Cr19Ni10 dissimilar steel[J].Petro & Chemical Equipment,2017,20(12):36-40.
[9] 凌堃.15CrMo和0Cr25Ni20异种钢焊接[J].热加工工艺,2009,38(3):148-149. LING K.Dissimilar steel welding of 15CrMo and 0Cr25Ni20[J].Hot Working Technology,2009,38(3):148-149.
[10] KOU S.Welding Metallurgy[M].[S.l.]:Wiley,2002.
[11] HAJIANNIA I,SHAMANIAN M,KASIRI M.Microstructure and mechanical properties of AISI 347 stainless steel/A335 low alloy steel dissimilar joint produced by gas tungsten arc welding[J].Materials & Design,2013,50:566-573.
[12] NAFFAKH H,SHAMANIAN M,ASHRAFIZADEH F.Dissimilar welding of AISI 310 austenitic stainless steel to nickel-based alloy Inconel 657[J].Journal of Materials Processing Technology,2009,209(7):3628-3639.
[13] AHMADI M,MIRSALEHI S E.Investigation on microstructure,mechanical properties and corrosion behavior of AISI 316L stainless steel to ASTM A335-P11 low alloy steel dissimilar welding joints[J].Materials at High Temperatures,2015,32(6):627-635.
[14] SIROHI S,PANDEY C,GOYAL A.Role of heat-treatment and filler on structure-property relationship of dissimilar welded joint of P22 and F69 steel[J].Fusion Engineering and Design,2020,159:111935.
[15] 姜勇.镍基和奥氏体的Cr5Mo异种钢焊接接头的高温性能研究[D].南京:南京工业大学,2003. JIANG Y.Study on high temperature behaviour of nickel-based and austenitic Cr5Mo dissimilar welded joints[D].Nanjing:Nanjing University of Technology,2003. [16] 肖龙仁,雷玉成,朱强,等.焊丝成分对T91/316L异种钢焊接接头微观组织和力学性能的影响[J].材料导报,2018,32(20):3601-3605. XIAO L R,LEI Y C,ZHU Q,et al.Effect of welding wires on microstructures and mechanical properties of T91/316L dissimilar welding joints[J].Materials Review,2018,32(20):3601-3605.
[17] SRIDHAR R,RAMKUMAR K D,ARIVAZHAGAN N.Characterization of microstructure,strength,and toughness of dissimilar weldments of Inconel 625 and duplex stainless steel SAF 2205[J].Acta Metallurgica Sinica (English Letters),2014,27(6):1018-1030.
[18] TAMMASOPHON N,HOMHRAJAI W,LOTHONGKUM G.Effect of postweld heat treatment on microstructures and hardness of TIG weldment between P22 and P91 steels with Inconel 625 filler metal[J].Journal of Metals,Materials and Minerals,2011,21(1):93-99.
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