轴肩作用下的金属流动过程分析
Analysis on the process of metal flow under the shoulder
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摘要: 采用阳极氧化的方法在待焊试板表面制备标记氧化膜作为标记材料，研究搅拌摩擦焊轴肩作用下的金属流动行为. 结果表明，标记氧化膜在焊缝中连续分布，从焊缝截面观察整体呈“C”形. 流动过程分析表明标记氧化膜处于轴肩前部时，金属向焊缝后退侧的外侧流动；标记氧化膜处于轴肩后部时，金属向焊缝中心流动，此外由于竖直方向上的速度差异使得标记氧化膜最终呈“C”形. 从标记氧化膜的分布位置来看，轴肩作用下的金属有从前进侧向后退侧迁移的趋势，金属迁移数量取决于所选择的焊接参数.
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关键词:
- 搅拌摩擦焊|标记氧化膜|金属流动
Abstract: The oxidation film as marking material was prepared and marked on the surface of test panel to be welded with the method of anodic oxidation, to research the metal flow behavior of friction stir welding under the action of shaft shoulder. The results showed that the marked oxidation film distributed continuously in welding line, which presents “C” shape as a whole. The analysis on flowing process showed that when the marked oxidation film was in the forepart of shaft shoulder, the metal flowed towards lateral of retreating side of welding line; when it was in the rear of shaft shoulder, the metal flowed towards the center of welding line. In addition, the oxidation film presented “C” shape finally due to the velocity contrast on the vertical direction. From distributed localization of oxidation film, the metal under the action of shaft shoulder migrated from advancing side to retreating side, the migration amount of metal depended on the selected welding parameters. -
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