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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Water Cooling on the Microstructure and Mechanical Properties of 6N01 Aluminum Alloy P-MIG-Welded Joints
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Effect of Water Cooling on the Microstructure and Mechanical Properties of 6N01 Aluminum Alloy P-MIG-Welded Joints

机译：水冷却对6N01铝合金P-MIG焊接接头微观结构和力学性能的影响

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摘要

In-process water cooling was applied to 8-mm-thick 6N01 aluminum alloy joined using the pulsed metal-inert gas (P-MIG) multi-pass welding method. The influence of the cooling conditions on the microstructure and mechanical properties of the welded joints were mainly discussed. Compared with natural cooling, under water cooling, the peak temperature decreased and the cooling rate increased substantially, leading to a decrease in the partially melted zone of the welded joint. The columnar grain sizes adjacent to the fusion boundary were much more elongated under water cooling than under natural cooling. In addition, when water cooling was performed, the width of the softened zone was approximately 6 mm smaller than that with natural cooling, and the overall microhardness of the welded joint was improved. The tensile and nominal yield strengths of the welded joint were approximately 11 and 7 MPa higher under water cooling than under natural cooling, respectively. The fracture surface morphology of the welded joints exhibited typical ductile fracture. Thus, water cooling can optimize the microstructure and improve the mechanical properties of the 6N01 alloy P-MIG-welded joint.
机译：使用脉冲金属 - 惰性气体（P-MIG）多通焊接方法连接到8mm厚的6N01铝合金的过程中水冷。探讨了冷却条件对焊接接头的微观结构和机械性能的影响。与天然冷却相比，在水冷下，峰值温度降低，冷却速率基本上增加，导致焊接接头的部分熔化区的减小。与熔融边界相邻的柱状晶粒在水冷下比在天然冷却下方更细长。另外，当进行水冷却时，软化区的宽度小于自然冷却的约6mm，并且改善了焊接接头的整体显微硬度。水冷下焊接接头的拉伸和标称屈服强度约为11和7MPa，分别小于自然冷却。焊接接头的断裂表面形态表现出典型的延性骨折。因此，水冷可以优化微观结构并改善6N01合金P-MIG焊接接头的机械性能。

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