基于Ni中间层的钛与不锈钢电阻点焊
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摘要
以100μm厚的Ni箔为中间层对钛与不锈钢进行了电阻点焊,观察并分析了接头熔核区域的组织特征,研究了焊接参数对Ti/Ni/SUS304接头熔核尺寸和抗剪力的影响。结果表明:在熔核端部外侧界面区Ti侧形成了(α-Ti)和Ti_2Ni相,靠近Ni侧形成了Ti Ni化合物;而在熔核区域的Ti侧、不锈钢侧和熔核内部分别观察到了(α-Ti)+TiFe层、(Fe)+TiFe_2层和TiFe+TiFe_2混合物;焊接接头的抗剪力随焊接电流、焊接时间、电极压力的增大呈先增大后降低的变化趋势,所得接头最大抗剪力约为5.62 kN。
Titanium and stainless steel sheets were welded by resistance spot welding with insert of 100 μm thick nickel foil. The interfacial microstructure of the nugget region of the welded joint was observed and analyzed,and the effects of welding parameters on nugget diameter and tensile shear resistance of the welded joint were studied. The results show that( α-Ti) and Ti_2 Ni phases are formed in the Ti side of the lateral interface region at the end of the nugget,and Ti Ni compounds are formed near the Ni side,while the( α-Ti)+ TiFe layer,( Fe) + TiFe_2 layer and mixture of TiFe + TiFe_2 compounds are observed in the Ti side,stainless steel side and center of nugget region,respectively. The tensile shear resistance of the welded joint increases firstly and then decreases with the increase of welding current,welding time and electrode force,and the maximum value of tensile shear resistance is about 5. 62 kN.
Titanium and stainless steel sheets were welded by resistance spot welding with insert of 100 μm thick nickel foil. The interfacial microstructure of the nugget region of the welded joint was observed and analyzed,and the effects of welding parameters on nugget diameter and tensile shear resistance of the welded joint were studied. The results show that( α-Ti) and Ti_2 Ni phases are formed in the Ti side of the lateral interface region at the end of the nugget,and Ti Ni compounds are formed near the Ni side,while the( α-Ti)+ TiFe layer,( Fe) + TiFe_2 layer and mixture of TiFe + TiFe_2 compounds are observed in the Ti side,stainless steel side and center of nugget region,respectively. The tensile shear resistance of the welded joint increases firstly and then decreases with the increase of welding current,welding time and electrode force,and the maximum value of tensile shear resistance is about 5. 62 kN.
引文
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[3]阎晓倩,江海涛,曾尚武,等.退火温度对钛钢轧制复合板组织和性能的影响[J].材料热处理学报,2013,34(6):77-81.YAN Xiao-qian,JIANG Hai-tao,ZENG Shang-wu,et al.Effect of heat treatment on microstructure and properties of titanium/steel rolling clad plate[J].Transactions of Materials and Heat Treatment,2013,34(6):77-81.
[4]Pardal C,Ganguly S,Williams S,et al.Dissimilar metal joining of stainless steel and titanium using copper as transition metal[J].The International Journal of Advanced Manufacturing Technology,2016,86(5/8):1139-1150.
[5]Gao M,Chen C,Wang L,et al.Laser-arc hybrid welding of dissimilar titanium alloy and stainless steel using copper wire[J].Metallurgical and Materials Transactions A,2015,46(5):2007-2020.
[6]Wang T,Zhang B,Feng J,et al.Effect of a copper filler metal on the microstructure and mechanical properties of electron beam welded titanium-stainless steel joint[J].Materials Characterization,2012,73:104-113.
[7]刘德义,周纯,丛立军,等.铜中间层钛-钢扩散复合界面组织与性能[J].材料热处理学报,2012,33(4):105-109.LIU De-yi,ZHOU Chun,CONG Li-jun,et al.Microstructure and mechanical properties of diffusion bonded joints between titanium and low carbon steel with copper interlayer[J].Transactions of Materials and Heat Treatment,2012,33(4):105-109.
[8]Kundu S,Chatterjee S.Evolution of interface microstructure and mechanical properties of titanium/304 stainless steel diffusion bonded joint using Nb interlayer[J].ISIJ International,2010,50(10):1460-1465.
[9]Tomashchuk I,Grevey D,Sallamand P.Dissimilar laser welding of AISI 316L stainless steel to Ti6-Al4-6V alloy via pure vanadium interlayer[J].Materials Science and Engineering A,2015,622:37-45.
[10]刘德义,尹青学,刘世程.铁中间层钛-钢扩散复合界面组织与性能[J].材料热处理学报,2012,33(7):106-110.LIU De-yi,YIN Qing-xue,LIU Shi-cheng.Microstructure and mechanical properties of diffusion bonded joints between titanium and low carbon steel with an iron interlayer[J].Transactions of Materials and Heat Treatment,2012,33(7):106-110.
[11]Gao M,Mei S W,Wang Z M,et al.Characterisation of laser welded dissimilar Ti/steel joint using Mg interlayer[J].Science and Technology of Welding and Joining,2012,17(4):269-276.
[12]Balasubramanian M.Application of Box-Behnken design for fabrication of titanium alloy and 304 stainless steel joints with silver interlayer by diffusion bonding[J].Materials and Design,2015,77:161-169.
[13]He P,Zhang J,Zhou R,et al.Diffusion bonding technology of a titanium alloy to a stainless steel web with an Ni interlayer[J].Materials Characterization,1999,43:287-292.
[14]Wang F L,Shen G M,Deng Y Q.Impulse pressuring diffusion bonding of titanium to 304 stainless steel using pure Ni interlayer[J].Rare Metals,2016,35(4):331-336.
[15]Yildiz A,Kaya Y,Kahraman N.Joint properties and microstructure of diffusion-bonded grade 2 titanium to AISI 430 ferritic stainless steel using pure Ni interlayer[J].The International Journal of Advanced Manufacturing Technology,2016,86:1287-1298.
[16]Kundu S,Chatterjee S.Characterization of diffusion bonded joint between titanium and 304 stainless steel using a Ni interlayer[J].Materials Characterization,2008,59:631-637.
[17]杜则裕.焊接科学基础-材料焊接科学基础[M].北京:机械工业出版社,2012.
[18]邱然锋,李青哲,石红信,等.钛与低碳钢的电阻点焊[J].焊接学报,2018,39(4):45-48.QIU Ran-Feng,LI Qing-zhe,SHI Hong-xin,et al.Resistance spot welding of titanium and mild steel[J].Transactions of the China Welding Institution,2018,39(4):45-48.
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[20]The Japan Institute of Metals and Materials.Metal Data Book[M].Tokyo:Maruzen Co LTD,1984.