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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Tool Offset and Rotational Speed in Dissimilar Friction Stir Welding of AISI 304 Stainless Steel and Mild Steel
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Effect of Tool Offset and Rotational Speed in Dissimilar Friction Stir Welding of AISI 304 Stainless Steel and Mild Steel

机译：AISI 304不锈钢和温阳钢不同摩擦搅拌焊接工具偏移和转速的影响

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摘要

In the present study, dissimilar friction stir welding was carried out between stainless steel (UNS S30400) and mild steel (UNS G10080) plates of 4 mm thickness using a tungsten carbide tool. The influence of tool rotational speeds (600, 875 rpm) and tool offsets (0.6, 1.2 mm) on mechanical properties, i.e., hardness, tensile strength, and impact toughness of welded joints was investigated. Maximum tensile strength of the joint was about 107.6% of the mild steel under rotational speed of 875 rpm and tool offset of 1.2 mm. The maximum hardness reached in the stir zone was about 281 HV0.5 due to the phase transformations and grain refinement. Charpy's notch toughness of the welded joints was observed lower than the base materials. The microstructural characterizations were carried by using an optical microscope, and FESEM-EDS analysis which revealed the complex material mixing and material movement during the welding. Tungsten-rich bands were observed in the weld micrograph especially toward the advancing side. During this study, various wear mechanisms like oxidation wear, abrasive wear, and adhesion wear were responsible for the degradation of tungsten carbide tool.
机译：在本研究中，使用碳化钨工具在4mm厚的不锈钢（UNS S30400）和低温钢（Uns G10080）板之间进行不同的摩擦搅拌焊接。研究了工具转速（600,875rpm）和工具偏移（0.6,1.2mm）对机械性能的影响，即硬度，拉伸强度和焊接接头的冲击韧性。在875rpm的转速下，接头的最大抗拉强度约为67.6％，旋转速度为875rpm，刀具偏移为1.2mm。由于相变和晶粒细化，搅拌区中达到的最大硬度约为281 HV0.5。观察到焊接接头的触角韧性低于基础材料。通过使用光学显微镜和FESEM-EDS分析携带微观结构表征，其揭示了在焊接过程中的复杂材料混合和材料运动。在焊接显微照片中观察到富含富有的带，特别是朝向前进方。在该研究期间，各种磨损机构如氧化磨损，磨料磨损和粘附磨损都是碳化钨工具的降解的原因。

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