Abstract With the appropriate process parameters, both large and small tools can produce sound joints with tensile strengths (TS) 80% higher than those fabricated with Al base metal. As a large tool moves into the steel, it can peel off and embed steel fragments into the Al matrix, causing critical defects around the embedded fragments. Using small tools and lower rotational speed (RS) will significantly reduce the welding heat, resulting in an unwelded Al/steel interface at the bottom of the weld. Since the tool size and process parameters determine the amount of generated heat, they also determine the thickness of the intermetallic compound (IMC) layer that forms at the Al/steel interface. The welding forces in the weld plane are primarily affected by the tool offset.

中文翻译：

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刀具几何形状对 AA6061 与 TRIP 钢搅拌摩擦焊的影响

摘要 通过适当的工艺参数，大型和小型工具都可以生产出抗拉强度 (TS) 比使用铝基金属制造的接头高 80% 的良好接头。当大型工具移入钢中时，它会剥落钢碎片并将其嵌入铝基体中，从而导致嵌入碎片周围出现严重缺陷。使用小型工具和较低的转速 (RS) 将显着降低焊接热量，从而导致焊缝底部出现未焊接的铝/钢界面。由于工具尺寸和工艺参数决定了产生的热量，它们也决定了在铝/钢界面形成的金属间化合物 (IMC) 层的厚度。焊接平面中的焊接力主要受刀具偏移的影响。