在强制冷却条件下对2024-T4铝合金板进行搅拌摩擦加工,分析了各区(母材区、热机影响区、搅拌区)的组织形貌特征,并研究了前进速度对加工区组织性能的影响.结果表明,从母材、热机影响区到搅拌区晶粒逐渐减小,搅拌区为均匀细小的再结晶组织,平均晶粒尺寸达1.9 μm;母材大部分为大角度晶界,热机影响区主要为小角度晶界,搅拌区取向差分布呈双峰模态.搅拌区硬度和抗拉强度随前进速度增大而增大.
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