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Effect of magnetic field on weld zone by spot-welding in stainless steel

机译：磁场对不锈钢点焊的焊接区的影响

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摘要

Spot welding is performed through a resistance welding process in which the components to be welded are clamped between two electrodes supplying heat current. It is known that a weld fusion zone and a heat-affected zone (HAZ), which experience high temperature followed by rapid cooling to room temperature, exhibit very different microstructures, compared with those of base materials. The microstructure of the weld fusion zone and HAZ (weld zone) is influenced by many factors such as chemical composition, welding condition and peak temperature. In this study, the effect of magnetic field on HAZ in spot welded stainless steel was studied. For this purpose, deformed and undeformed 301 type stainless steel (Fe-17mass percentCr-7mass percentNi-0.1 mass percentC-0.5mass percentSi-0.99mass percent Mn) samples with a' martensite phase and 7 austenite phase, respectively, were spot-welded under a magnetic field up to 2T. The welded surfaces and the cross-section planes were examined using an optical microscope. It was found that the area of HAZ was increased with increasing magnetic field, as well as the heat input power. Moreover, the area of weld zone in deformed stainless steel is larger than that in undeformed stainless steel. Based on the experimental results, the effect of magnetic field on HAZ in spot-welded stainless steel was discussed.
机译：点焊通过电阻焊接工艺执行，在该工艺中，要焊接的部件被夹在两个提供热电流的电极之间。众所周知，与基础材料相比，经历高温然后快速冷却至室温的焊接熔合区和热影响区（HAZ）呈现出非常不同的微观结构。焊接熔合区和HAZ（焊接区）的微观结构受许多因素影响，例如化学成分，焊接条件和峰值温度。在这项研究中，研究了磁场对点焊不锈钢中热影响区的影响。为此，分别焊接了马氏体相和奥氏体相7的变形和未变形的301型不锈钢（Fe-17质量百分比Cr-7质量百分比Ni-0.1质量％C-0.5质量百分比Si-0.99质量百分比Mn）样品。在高达2T的磁场下。使用光学显微镜检查焊接表面和横截面。发现随着磁场的增加以及热输入功率的增加，热影响区的面积增加。而且，变形不锈钢的焊接区域面积比未变形不锈钢的焊接区域大。根据实验结果，讨论了磁场对点焊不锈钢中热影响区的影响。

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