Effect of tool pin profile on friction stir butt welding of high-zinc brass (CuZn40)
Effect of tool pin profile on friction stir butt welding of high-zinc brass (CuZn40)
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DOI：
10.1007/s00170-013-5480-1
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发表时间：
2014-03
期刊：
影响因子：
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通讯作者：
A. Emamikhah;A. Abbasi;Ali Atefat;M. K. B. Givi
中科院分区：
文献类型：
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作者：
A. Emamikhah;A. Abbasi;Ali Atefat;M. K. B. Givi
通过力学性能和微观组织分析，研究了搅拌头形状（倒角锥、单螺纹锥、三槽、螺纹圆柱、螺纹锥、花键和六面体）对高锌黄铜搅拌摩擦焊性能的影响。为了评估温度在摩擦搅拌焊接中的影响，通过在夹具主体内嵌入热电偶来测量温度。此外，为了评估工具形状的影响，主要FSW参数（旋转速度、行进速度和切入力）保持恒定。进行了机械试验（硬度、拉伸和弯曲）和显微组织检查，以研究焊接样品在温度测量方面的性能。结果表明，合适的工具可以产生足够的热量以下的肩部，由于进一步的材料搅拌。此外，对六面体样品的研究表明，焊缝附近的累积缺陷是机械弱化的一个原因，因为产生的热量较低。
In this experimental study, the effects of tool pin profiles (chamfered taper, single-threaded taper, three-flute, threaded cylinder, threaded taper, spline, and hexahedron) in friction stir welding of high-zinc brasses were explored through mechanical and micro-structural examinations. To evaluate the effect of temperature in friction stir welding, the temperature was measured by embedding thermocouples within the fixture body. Furthermore, in order to evaluate the effects of the tool shape, the main FSW parameters (rotational speed, travel speed and plunge force) were maintained constant. Mechanical tests (hardness, tensile and bending) and micro-structural examinations were performed to study the properties of welded samples with regard to temperature measurement. The results indicated that suitable tools can generate enough heat below the shoulder due to further materials stirring. Moreover, studies of a hexahedron sample revealed that accumulated defects near the weld were one reason for mechanical weakening with regard to a lower heat generated.