基于中间层的铝合金/钢电阻点焊
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摘要
以AlSi12为中间层对A6061铝合金与Q235低碳钢进行了电阻点焊,分析了界面区金属间化合物层形貌及分布等微观组织结构特征,探讨了焊接电流、焊接时间与电极压力对接头熔核尺寸和抗剪力的影响。结果表明:接头熔核直径、抗剪力随焊接电流、焊接时间的增加而增加,随电极压力的增大而降低,所得接头抗剪力达到4.87 kN,中间过渡层的使用起到了抑制界面金属间化合物生长的效果。
The resistance spot welding of A6061 aluminum alloy and Q235 low carbon steel was carried out using AlSi12 as the intermediate layer, and the morphology and distribution of intermetallic compound layer in the interfacial zone were analyzed, and the effects of welding current, welding time and electrode pressure on nugget size and tensile shear load of the joint were investigated. The results show that the nugget diameter and tensile shear load of the joint increase with the increase of welding current and welding time, and decrease with the increase of electrode pressure, and the maximum tensile shear load of the joint reaches 4.87 kN. The intermediate transition layer inhibits the growth of intermetallic compounds at the interface.
The resistance spot welding of A6061 aluminum alloy and Q235 low carbon steel was carried out using AlSi12 as the intermediate layer, and the morphology and distribution of intermetallic compound layer in the interfacial zone were analyzed, and the effects of welding current, welding time and electrode pressure on nugget size and tensile shear load of the joint were investigated. The results show that the nugget diameter and tensile shear load of the joint increase with the increase of welding current and welding time, and decrease with the increase of electrode pressure, and the maximum tensile shear load of the joint reaches 4.87 kN. The intermediate transition layer inhibits the growth of intermetallic compounds at the interface.
引文
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[2] Qiu R F,Wang N N,Shi H X,et al.Joining steel to aluminum alloy by resistance spot welding with a rivet[J].Internation Journal of Materials Research,2015,106(1):60-65.
[3] Ling Z X,Li Y,Luo Z,et al.Resistance element welding of 6061 aluminum alloy to uncoated 22MnMoB boron steel[J].Materials and Manufacturing Processes,2016,31(16):2174-2180.
[4] 凌展翔,罗震,冯悦峤,等.硼钢与铝合金的新型电阻单元焊技术[J].焊接学报,2016,37(7):109-113.LING Zhan-xiang,LUO Zhen,FENG Yue-qiao,et al.Novel resistance element welding of Al alloy to boron steel[J].Transactions of the China Welding Institution,2016,37(7):109-113.
[5] 凌展翔,罗震,冯悦峤,等.铝钢点焊铆接复合连接技术[J].焊接学报,2017,38(2):101-104.LING Zhan-xiang,LUO Zhen,FENG Yue-qiao,et al.A combination joining technology of spot welding and riveting for aluminum and steel[J].Transactions of the China Welding Institution,2017,38(2):101-104.
[6] Ling Z X,Li Y,Luo Z,et al.Microstructure and fatigue behavior of resistance element welded dissimilar joints of DP780 dual-phase steel to 6061-T6 aluminum alloy[J].International Journal of Advanced Manufacturing Technology,2017,92(5/8):1923-1931.
[7] Lou M,Li Y B,Wang Y,et al.Influence of resistance heating on self-piercing riveted dissimilar joints of AA6061-T6 and galvanized DP590[J].Journal of Materials Processing Technology,2014,214:2119-2126.
[8] Chen J B,Yuan X J,Hu Z,et al.Improvement of resistance-spot-welded joints for DP600 steel and A5052 aluminum alloy with Zn slice interlayer[J].Journal of Manufacturing Processes,2017,30:396-405.
[9] 张月莹,孙大千,李洪梅,等.Cu对铝/钢异种金属电阻点焊接头组织及性能的影响[J].长春工业大学学报,2017,38(1):8-13.ZHANG Yue-ying,SUN Da-qian,LI Hong-mei,et al.Effects of Cu on microstructures and properties of resistance spot welded joints of aluminium and steel[J].Journal of Changchun University of Technology,2017,38(1):8-13.
[10] Ibrahim I,Ito R,Kakiuchi T,et al.Fatigue behaviour of Al/steel dissimilar resistance spot welds fabricated using Al-Mg interlayer[J].Science and Technology of Welding and Joining,2016,21(3):223-233.
[11] Matsumoto K,Urushihara W,Takeda M,et al.Effects of silicon content on joint strength of aluminum alloy and steel spot welded joints[J].Research and Development Kobe Steel Engineering Reports,2012,62(2):77-81.
[12] 张柯柯,杜宜乐,邱然锋,等.A6061铝合金与Q235 钢电阻点焊接头组织与性能[J].材料热处理学报,2012,33(12):64-67.ZHANG Ke-ke,DU Yi-le,QIU Ran-Feng,et al.Microstructure and properties of A6061 aluminum alloy/Q235 steel joint welded by resistance spot welding[J].Transactions of Materials and Heat Treatment,2012,33(12):64-67.
[13] 邱然锋,李久勇,贺玉刚,等.铝合金/低碳钢点焊界面反应物生长机制[J].中国有色金属学报,2017,27(6):1176-1181.QIU Ran-feng,LI Jiu-yong,HE Yu-gang,et al.Growth mechanism of reactants at spot welding interface between aluminum alloy and low carbon steel[J].The Chinese Journal of Nonferrous Metals,2017,27(6):1176-1181.
[14] 王楠楠,邱然锋,石红信,等.铝合金与低碳钢的夹层电阻点焊接头特性[J].材料热处理学报,2015,36(1):70-74.WANG Nan-nan,QIU Ran-Feng,SHI Hong-xin,et al.Charaterization of resistance spot welded joint between aluminum alloy and mild steel with an interlayer[J].Transactions of Materials and Heat Treatment,2015,36(1):70-74.