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
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摘要
采用非熔化极惰性气体保护焊(Tungsten Inert Gas,TIG)工艺,在焊接电流为90～120 A条件下,分别选用直径为Φ2. 0 mm的ER309焊丝和Ni317焊丝对0Cr18Ni9奥氏体不锈钢和Q235碳钢进行双面焊。对各个参数条件下焊后的接头分别进行金相组织观察、拉伸性能测试及断口形貌分析,分析焊丝和焊接电流对焊接接头的组织与性能的影响。实验表明,采用高镍焊丝Ni317时,焊缝组织中奥氏体成分大大增加;采用同种焊丝,当焊接电流在90～120 A区间变化时,随着电流增加,接头的抗拉强度增大,拉伸断口均出现韧窝,且ER309焊丝得到的韧窝尺寸大而深;采用同种电流时,采用ER309焊丝的接头的抗拉强度要高于采用Ni317焊丝接头。
The tungsten inert gas shielded( TIG) welding process was used to weld the joint of 0Cr18Ni9 austenitic stainless steel and Q235 carbon steel with Φ2. 0 mm diameter ER309 wire and Ni317 wire respectively under the welding current of 90-120 A from both sides. The metallographic structure observation,tensile test and fracture morphology analysis of the joints welded under different parameters were carried out. The effects of welding wires and welding currents on the microstructure and properties of welded joints were analyzed. The experiments show that when high nickel welding wire Ni317 is used,austenite content in the weld line structure is greathy increased; with the same welding wire,when the welding current changes from 90 to 120 A,the tensile strength of the joint increases with the increase of welding current,dimples appear on the tensile fracture surface,and ER309 welding wire is easier to get large and deep dimples; with the same welding current,tensile property of the joints welded by ER309 welding wire is better than that of the joints welded by Ni317 welding wire.
The tungsten inert gas shielded( TIG) welding process was used to weld the joint of 0Cr18Ni9 austenitic stainless steel and Q235 carbon steel with Φ2. 0 mm diameter ER309 wire and Ni317 wire respectively under the welding current of 90-120 A from both sides. The metallographic structure observation,tensile test and fracture morphology analysis of the joints welded under different parameters were carried out. The effects of welding wires and welding currents on the microstructure and properties of welded joints were analyzed. The experiments show that when high nickel welding wire Ni317 is used,austenite content in the weld line structure is greathy increased; with the same welding wire,when the welding current changes from 90 to 120 A,the tensile strength of the joint increases with the increase of welding current,dimples appear on the tensile fracture surface,and ER309 welding wire is easier to get large and deep dimples; with the same welding current,tensile property of the joints welded by ER309 welding wire is better than that of the joints welded by Ni317 welding wire.
引文
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[2]郑丽娟,李田,杜文连,等.ZL201铝铜合金焊接接头电磁热强化实验研究[J].塑性工程学报,2017,24(4):67-70.ZHENG Lijuan,LI Tian,DU Wenlian,et al.Experimental study of electromagnetic heat strengthening on ZL201 aluminumcopper alloy welded joint[J].Journal of Plasticity Engineering,2017,24(4):67-70.
[3]刘丹.碳钢和不锈钢焊接接头性能分析[J].上海电气技术,2014,7(2):33-36.LIU Dan.Performance analysis of welded joint of carbon steel and stainless steel[J].Shanghai Electric Technology,2014,7(2):33-36.
[4]文仁兴.0Cr18Ni9Ti/Q235复合板的焊接性能分析[J].科技风,2011,(23):126-127.WEN Renxing.Welding performance analysis of 0Cr18Ni9Ti/Q235 composite plate[J].Scientific and Technological Wind,2011,(23):126-127.
[5]陈今良,赖奇,庞志宁,等.SAF2507双相不锈钢与Q235碳钢异种金属板材的焊接[J].塑性工程学报,2014,21(5):145-149.CHEN Jinliang,LAI Qi,PANG Zhining,et al.Welding of SAF2507 duplex stainless steel and Q235 carbon steel dissimilar metal sheet[J].Journal of Plasticity Engineering,2014,21(5):145-149.
[6]黄本生,杨江,卢东华,等.Q345/316L异种钢焊接接头显微组织结构与力学性能[J].材料热处理学报,2016,37(5):45-51.HUANG Bensheng,YANG Jiang,LU Donghua,et al.Microstructure and mechanical properties of Q345/316L dissimilar steel welded joint[J].Journal of Materials Heat Treatment,2016,37(5):45-51.
[7]黄本生,刘记,刘阁,等.Q235与316L异种钢焊接接头的显微结构与力学性能研究[J].热加工工艺,2013,42(9):169-173.HUANG Bensheng,LIU Ji,LIU Ge,et al.Microstructure and mechanical properties of dissimilar steel welded joints between Q235 and 316L[J].Hot Working Technology,2013,42(9):168-173.
[8]李光耀,陈侣侣,耿辉辉,等.5182Al/HC340LA异种金属件磁脉冲焊接数值模拟与试验验证[J].塑性工程学报,2018,25(3):155-162.LI Guangyao,CHEN Lülü,GENG Huihui,et al.Numerical simulation and experimental verification of magnetic pulse welding for dissimilar metal parts 5182Al/HC340LA[J].Journal of Plasticity Engineering,2018,25(3):155-162.
[9]王一鸣.SAF2507和Q235A异种钢焊接接头组织性能及模拟研究[D].太原:太原科技大学,2015.WANG Yiming.Microstructure and properties of SAF2507 and Q235A dissimilar steel welded joints and simulation study[D].Taiyuan:Taiyuan University of Science and Technology,2015.
[10]廖喜平,谢其军,胡成亮,等.304奥氏体不锈钢热变形行为及热加工图[J].锻压技术,2017,42(12):150-156.LIAO Xiping,XIE Qijun,HU Chengliang,et al.Hot deformation behavior and processing map of austenite stainless steel 304[J].Forging&Stamping Technology,2017,42(12):150-156.
[11]杨厚君,章应霖,曹晟.异种钢焊接接头碳迁移试验现象的分析[J].焊接学报,2001,22(2):89-92.YANG Houjun,ZHANG Yinglin,CAO Sheng.Analysis of carbon migration test phenomena in dissimilar steel welded joints[J].Journal of Welding,2001,22(2):89-92.
[12]彭杏娜,彭云,田志凌,等.Ni元素对Cr-Ni-Mo系高强焊缝组织演化的影响[J].焊接学报,2014,35(9):32-36.PENG Xingna,PENG Yun,TIAN Zhiling,et al.Effect of Ni element on microstructure evolution of Cr-Ni-Mo high strength weld[J].Journal of Welding,2014,35(9):32-36.