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邱然锋1,2,李青哲1,石红信1,2,里中忍3. 钛与低碳钢的电阻点焊[J]. 焊接学报, 2018, 39(4): 45-48. DOI: 10.12073/j.hjxb.2018390093
引用本文: 邱然锋1,2,李青哲1,石红信1,2,里中忍3. 钛与低碳钢的电阻点焊[J]. 焊接学报, 2018, 39(4): 45-48. DOI: 10.12073/j.hjxb.2018390093
QIU Ranfeng1,2, LI Qingzhe1, SHI Hongxin1,2, SATONAKA Shinobu3. Resistance spot welding of titanium and mild steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(4): 45-48. DOI: 10.12073/j.hjxb.2018390093
Citation: QIU Ranfeng1,2, LI Qingzhe1, SHI Hongxin1,2, SATONAKA Shinobu3. Resistance spot welding of titanium and mild steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(4): 45-48. DOI: 10.12073/j.hjxb.2018390093

钛与低碳钢的电阻点焊

Resistance spot welding of titanium and mild steel

  • 摘要: 采用电阻点焊方法对纯钛与低碳钢Q235进行焊接试验,利用扫描电子显微镜观察分析了熔核区组织特性,探讨了焊接电流对熔核尺寸和抗剪载荷的影响. 结果表明,受焦耳热的影响熔核直径随焊接电流的增加而增加,抗剪载荷则随焊接电流的增大而呈先升后降的变化趋势,焊接电流为8 kA时所得接头的抗剪载荷最大,约2.85 kN. 在钢侧熔核区观察到了靠近钢侧厚度约为30~50 μm的TiFe2+α-Fe共晶组织层和粗大TiFe柱状晶;钛侧熔核区主要由靠近钛侧约12 μm厚的TiFe+α-Ti共晶组织层和TiFe柱状晶构成,且观察到了宏观分层现象.

     

    Abstract: Pure titanium and mild steel Q235 sheets were welded by resistance spot welding. The nugget microstructure was observed and analyzed by using scanning electron microscopy. The effects of welding current on nugget size and tensile shear load of the joint were investigated. With the increasing of welding current, the nugget diameter increased while the tensile shear load of joint increased and then decreased when welding current was over 8 kA. A tensile shear load of a maximum of 2.85 kN was obtained at a welding current of 8 kA. The nugget of steel side was mainly composed of a 30~50 μm thick TiFe2+α-Fe eutectic structure layer adjacent steel and coarser TiFe columnar crystals. An approximately 12 μm thick TiFe+α-Ti eutectic structure layer adjacent titanium and TiFe columnar crystals were observed in the nugget zone of titanium side where macro stratification was also observed.

     

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