Q345B低碳钢/20Mn23Al无磁钢异种钢焊接接头的组织及性能
Microstructure and Property of Dissimilar Steel Welded Joint ofQ345B Low Carbon Steel and 20Mn23Al Non-magnetic Steel
摘 要
采用E316LT0-1不锈钢焊丝对Q345B低碳钢和20Mn23Al无磁钢进行熔化极气体保护焊，研究了焊接接头的显微组织和力学性能。结果表明：接头填充焊层组织主要为骨骼状δ-铁素体和奥氏体，打底焊层组织主要为树枝状铁素体和奥氏体；Q345B钢侧过热粗晶区组织为贝氏体和魏氏体，相变重结晶区组织为珠光体和铁素体，20Mn23Al钢侧热影响区组织为孪晶奥氏体和少量铁素体；母材和焊缝中的合金元素发生互扩散，Q345B钢和20Mn23Al钢侧扩散层厚度分别约为15，25 μm；接头拉伸性能优于Q345B钢但略差于20Mn23Al钢，接头焊缝区硬度最大，热影响区次之。
元素扩散
显微组织
力学性能
dissimilar steel welding
element diffusion
microstructure
mechanical property
Abstract
Q345B low carbon steel and 20Mn23Al non-magnetic steel were welded by gas metal arc welding with E316LT0-1 stainless steel welding wire. The microstructure and mechanical properties of the welded joint were studied. The results show that the microstructure of the filling weld layer consisted of skeletal δ ferrite and austenite, and that of the backing weld layer was composed of dendritic ferrite and austenite. The microstructure of the overheated coarse-grained zone on the Q345B steel side consisted of bainite and Widmanstaten structure, and that of the phase transformation recrystallization zone consisted of pearlite and ferrite. The heat-affected zone on the 20Mn23Al steel side had a microstrucrture of twin austenite and a small amount of ferrite. The interdiffusion of alloying elements in the base metals and weld occured, and the diffusion layer thicknesses on the Q345B steel side and 20Mn23Al steel side were about 15, 25 μm, respectively. The tensile property of the joint was better than that of the Q345B steel while worse than that of the 20Mn23Al steel. The weld of the joint had the largest hardness, followed by the heat-affected zone.
中图分类号 TG407 DOI 10.11973/jxgccl202108012
所属栏目 材料性能及应用
基金项目 国家自然科学基金资助项目（51274162）；陕西省教育厅服务地方专项计划项目（16JF021）；陕西省教育厅重点实验室科研计划项目（15JS082）；西安市科技计划项目（201805037YD15CG21（16））
收稿日期 2020/8/12
修改稿日期 2021/7/9
网络出版日期
作者单位点击查看
备注张敏(1967-),男,陕西西安人,教授,博士
引用该论文: ZHANG Min,DU Mingke,ZHANG Yunlong,WANG Gang,ZHU Ziyue. Microstructure and Property of Dissimilar Steel Welded Joint ofQ345B Low Carbon Steel and 20Mn23Al Non-magnetic Steel[J]. Materials for mechancial engineering, 2021, 45(8): 66～71
张敏,杜明科,张云龙,王刚,朱子越. Q345B低碳钢/20Mn23Al无磁钢异种钢焊接接头的组织及性能[J]. 机械工程材料, 2021, 45(8): 66～71
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【2】XIE Y J,ZHUANG J,HUANG B S,et al.Effect of different welding parameters on residual stress and deformation of 20/0Cr18Ni9 dissimilar metal arc-welding joint[J].Journal of Adhesion Science and Technology,2020,34(15):1628-1652.
【3】CAO J,GONG Y,ZHU K,et al.Microstructure and mechanical properties of dissimilar materials joints between T92 martensitic and S304H austenitic steels[J].Materials & Design,2011,32(5):2763-2770.
【4】郑韶先,李晔楠,史伟,等.超窄间隙焊接Q235/1Cr18Ni9Ti异种钢接头组织及力学性能[J].焊接学报,2019,40(8):38-43. ZHENG S X,LI Y N,SHI W,et al.Microstructures and mechanical properties of welding joint of Q235/1Cr18Ni9Ti dissimilar steel with ultra-narrow-gap welding[J].Transactions of the China Welding Institution,2019,40(8):38-43.
【5】张太付,杨翔,侯伟,等.304H与310S异种钢焊接工艺及接头性能研究[J].材料开发与应用,2020,35(1):80-83. ZHANG T F,YANG X,HOU W,et al.Research on welding procedure and properties of welded joints of 304H and 310S[J].Development and Application of Materials,2020,35(1):80-83.
【6】GHOSH N,PAL P K,NANDI G.GMAW dissimilar welding of AISI 409 ferritic stainless steel to AISI 316L austenitic stainless steel by using AISI 308 filler wire[J].Engineering Science and Technology,an International Journal,2017,20(4):1334-1341.
【7】MOUSAVI ANIJDAN S H,SABZI M,GHOBEITI-HASAB M,et al.Optimization of spot welding process parameters in dissimilar joint of dual phase steel DP600 and AISI 304 stainless steel to achieve the highest level of shear-tensile strength[J].Materials Science and Engineering:A,2018,726:120-125.
【8】VIDYARTHY R S,KULKARNI A,DWIVEDI D K.Study of microstructure and mechanical property relationships of A-TIG welded P91-316L dissimilar steel joint[J].Materials Science and Engineering:A,2017,695:249-257.
【9】岑耀东,陈芙蓉.TRIP980高强钢/SPCC低碳钢的异种钢板电阻点焊接头组织及力学性能研究[J].材料研究学报,2018,32(3):216-224. CEN Y D,CHEN F R.Microstructure and mechanical property of resistance spot welded joint of dissimilar steels of TRIP 980 high strength steel and SPCC low carbon steel[J].Chinese Journal of Materials Research,2018,32(3):216-224.
【10】温飞娟,何顺,周培山,等.SMAW+FCAW异种钢L360/X65焊接工艺研究[J].焊接技术,2020,49(7):37-39. WEN F J,HE S,ZHOU P S,et al.Study on welding process of dissimilar steel L36/X65 by SMAW and FCAW[J].Welding Technology,2020,49(7):37-39.
【11】欧平,孙坚,张茂龙,等.SA508/316L异种钢焊接接头的显微组织[J].材料热处理学报,2013,34(10):132-138. OU P,SUN J,ZHANG M L,et al.Microstructure of SA508/316L dissimilar steel welding joints[J].Transactions of Materials and Heat Treatment,2013,34(10):132-138.
【12】周国伟,笪耀东,徐宜宏,等.1000 MW超超临界二次再热锅炉集箱异种钢管接头结构问题探讨[J].中国特种设备安全,2018,34(12):12-18. ZHOU G W,DA Y D,XU Y H,et al.Discussion on the joint structure of different steel pipes in header of 1000 MW ultra supercritical secondary reheat boiler[J].China Special Equipment Safety,2018,34(12):12-18.
【13】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.
【14】胡士廉,马良超,马冰,等.低密度钢与异种钢的焊接工艺研究[J].兵器材料科学与工程,2019,42(1):69-73. HU S L,MA L C,MA B,et al.Welding process of low density steel and dissimilar steels[J].Ordnance Material Science and Engineering,2019,42(1):69-73.
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【17】石青,王志斌,王文先,等.铁素体不锈钢/奥氏体不锈钢焊接接头的组织和性能[J].材料热处理学报,2014,35(4):143-148. SHI Q,WANG Z B,WANG W X,et al.Microstructure and properties of dissimilar metal welds of ferritic and austenitic stainless steels[J].Transactions of Materials and Heat Treatment,2014,35(4):143-148.
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