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研究了摩擦辅助管应变(FATS)法对管材组织和力学性能的影响.采用有限元法分析并进行实验测试.用Taguchi设计(ATD)进行分析,改变转速、进给速率和模具角度来进行数值和实验试验.结果表明,提高进给速率和降低转速提高了Zener-Hollomon参数(Z),减小了平均晶粒尺寸,而对模具角度没有显著影响.增加Z值可以减小晶粒尺寸,增强加工样品的流动应力.实验结果表明,具有最大Z值的样品其晶粒尺寸从初始的40 μm细化到8 μm,其流动应力增加5倍.“,”This paper investigates process parameter effects on microstructure and mechanical properties of the tubes processed via recently developed friction assisted tube straining (FATS) method. For this purpose, design of experiment was used to arrange finite element analyses and experimental tests. Numerical and experimental tests were executed by changing rotary speed, feed rate and die angle. Taguchi design results show that increasing feed rate and decreasing rotary speed enhance Zener-Hollomon (Z) parameter and decrease average grain size, while die angle has no considerable effect. Increasing Z value reduces grain size and enhances flow stress of the processed samples, while the experiment with the highest Z value refines initial microstructure from 40 to 8 μm and increases flow stress by 5 times.