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首页> 外文期刊>Journal of Mechanical Science and Technology >Correlated macrostructural parameters of weld and weld current in the SMAW of small pipes
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Correlated macrostructural parameters of weld and weld current in the SMAW of small pipes

机译：小型管道焊缝中焊缝和焊接电流的相关宏观结构参数

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摘要

The present research investigated the effect of increased weld current on the apparent discontinuities, macrostructure, and hardness in the shielded metal arc welding of pipes. Thin, small pipes were butt welded, and the section view of the weld was observed using an optical microscope equipped with an image analyzer. Vickers hardness measurements were also made. The results indicated that the area of the melting zone and the width of the weld at the midpoint of pipe thickness were the appropriate parameters for assessing the weld current. In contrast, the lengths of the columnar grain zone and hardness values were not correlated with the current levels. A moderate current level caused the mechanical properties of the melting zone to become closer to those of the parent metal.
机译：本研究研究了增加的焊接电流对管道的屏蔽金属电弧焊中表观不连续性，宏观结构和硬度的影响。对细的小管子进行对接焊接，并使用配备有图像分析仪的光学显微镜观察焊缝的截面图。还进行了维氏硬度测量。结果表明，熔化区的面积和焊缝宽度在管道厚度的中点是评估焊缝电流的合适参数。相反，柱状晶粒区的长度和硬度值与电流水平不相关。适中的电流水平导致熔化区的机械性能变得更接近母体金属的机械性能。

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