保温时间对铝与钢电阻点焊性能的影响

IF 3.1 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science and Technology of Welding and Joining Pub Date : 2022-10-03 DOI:10.1080/13621718.2022.2080448

Xianming Meng, Siwei Li, Liting Shi, Yongqiang Zhang, Yajun Chen, Sai Zhang, Hao Wu

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引用次数: 4

摘要

研究了保温时间对铝合金与双相钢电阻点焊焊缝质量的影响。结果表明，在最佳保温时间范围(350 ~ 500 ms)内，可获得最大熔核直径(7.6 mm)、最薄金属间化合物(IMC)层(1 ~ 5µm)和最大拉伸剪切峰值载荷(4.7 kN)。保温时间过短，由于去电极后散热减少，导致收缩，焊核小，IMC层变厚，导致拉伸峰值载荷低，沿IMC层发生脆性断裂。而保温时间过长，即750 ms，由于散热更快，产生的焊核直径较小。

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Effect of hold time on resistance spot weldability of aluminium to steel

The effects of welding hold time on weld quality of aluminium alloy to dual-phase steel resistance spot welds were studied. Results demonstrated that there existed an optimum range of hold time (350∼500 ms), within which the largest weld nugget diameter (7.6 mm), thinnest intermetallic compound (IMC) layer (1∼5 µm) and maximum tensile shear peak load (4.7 kN) were obtained. Too short hold time led to shrinkage, small weld nugget and thick IMC layer due to reduced heat dissipation after removing electrodes, thus resulting in low tensile peak load and brittle fracture along the IMC layer. While too long hold time, i.e. 750 ms, produced a smaller weld nugget diameter due to more rapid heat dissipation.

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来源期刊

Science and Technology of Welding and Joining 工程技术-材料科学：综合

CiteScore

6.10

自引率

12.10%

发文量

审稿时长

1.7 months

期刊介绍： Science and Technology of Welding and Joining is an international peer-reviewed journal covering both the basic science and applied technology of welding and joining. Its comprehensive scope encompasses all welding and joining techniques (brazing, soldering, mechanical joining, etc.) and aspects such as characterisation of heat sources, mathematical modelling of transport phenomena, weld pool solidification, phase transformations in weldments, microstructure-property relationships, welding processes, weld sensing, control and automation, neural network applications, and joining of advanced materials, including plastics and composites.