采用搅拌摩擦加工对汽车用6061铝合金板进行改性处理，研究了不同旋转速度（300~1 100 r·min^-1）和行进速度（120~300 mm·min^-1）下铝合金的拉伸性能和耐腐蚀性能。结果表明：在行进速度为300 mm·min^-1条件下，随着旋转速度的增大，6061铝合金的抗拉强度和屈服强度先增大后减小，伸长率呈曲折变化趋势，自腐蚀电位先正移后负移，且当旋转速度为600 r·min^-1时，抗拉强度和屈服强度最大，自腐蚀电位最正；在旋转速度为600 r·min^-1条件下，随着行进速度的增大，6061铝合金的抗拉强度和屈服强度增大，伸长率先减小后增大，自腐蚀电位先正移后负移，且当行进速度为300 mm·min^-1时，抗拉强度和屈服强度最大，自腐蚀电位最正；旋转速度和行进速度分别为600 r·min^-1、300 mm·min^-1时，6061铝合金的拉伸性能和耐腐蚀性能最优。

The modification of 6061 aluminum alloy plate for automobile were carried out by friction stir processing, and the tensile properties and corrosion resistance at different rotation speeds (300-1 100 r·min^-1) and travel speeds (120-300 mm·min^-1) were studied. The results show that when the travel speed was 300 mm·min^-1, with increasing the rotation speed, the tensile strength and yield strength of 6061 aluminum alloy first increased and then decreased, and the elongation changed with inflection; the self-corrosion potential first moved positively and then negatively; when the rotation speed was 600 r·min^-1, the tensile strength and yield strength were the highest, and the self-corrosion potential was the most positive. When the rotation speed was 600 r·min^-1, with increasing the travel speed, the tensile strength and yield strength of 6061 aluminum alloy increased, the elongation first decreased and then increased; the self-corrosion potential first moved positively and then negatively; when the travel speed was 300 mm·min^-1, the tensile strength and yield strength were the highest, and the self-corrosion potential was the most positive. When the rotation speed and travel speed were 600 r·min^-1 and 300 mm·min^-1, respectively, the tensile properties and corrosion resistance of 6061 aluminum alloy were the best.