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首页> 外文期刊>Journal of Materials Engineering and Performance >Microstructures and Mechanical Properties of Resistance Spot-Welded Steel/Aluminum Alloy Joints with Process Tapes
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Microstructures and Mechanical Properties of Resistance Spot-Welded Steel/Aluminum Alloy Joints with Process Tapes

机译：电阻点焊钢/铝合金接头与工艺胶带的微观结构和力学性能

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摘要

The microstructure and mechanical property of resistance spot-welded joints of steel and aluminum were studied by using process tapes. The steel/aluminum joint consists mainly of aluminum nugget and interface zone. The liquid nugget solidification has an epitaxial growth characteristic, and the interface zone displays a double-layer structure, Fe~(2)Al~(5)layer at steel side and Fe~(4)Al~(13)layer at aluminum nugget side. Compared with joints without process tape, the joint nugget diameter and tensile shear load increased by 35.45 and 10.98%, respectively, and its indentation ratio decreased by 56.25% due to the process tapes increasing heat input, producing larger nugget diameter and continuous interface layer, and protecting against deep indentation. The joining area of intermetallic layer and aluminum nugget is weak link in the joint. It is favorable to use the process tapes for improving welding quality, raising joint strength, and energy saving.
机译：采用工艺胶带研究了钢和铝的电阻点焊接头的微观结构和力学性能。 钢/铝接头主要由铝掘核和界面区组成。 液体块凝固具有外延生长特性，界面区显示钢侧的双层结构，Fe〜（2）Al〜（5）层，在铝金块处的Fe〜（4）Al〜（13）层 边。 与没有过程带的关节相比，关节块直径和拉伸剪切载荷分别增加了35.45％和10.98％，其压痕比由于过程带来热量输入，产生较大的块直径和连续的界面层，其压痕率降低了56.25％。 并防止深入压痕。 金属间层和铝金属间金属间隙的连接区域是关节中的薄弱环节。 有利的是使用工艺胶带来提高焊接质量，提高关节强度和节能。

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