Friction stir back extrusion is used to produce brass wires from its chips, and then the process parameters are optimized using Taguchi L9 orthogonal design of experiments. The rotational speed, traverse speed, and the produced wire diameter are the parameters taken into consideration. The optimum process parameters are determined with respect to grain size, microhardness, and ultimate pressure strength of the produced samples. The predicted optimum values for output parameters are confirmed by conducting the confirmation test using optimum parameters. Analysis of variance shows that the rotational speed is the most dominant factor in determining the grain size and microhardness of the produced wires, and the tool traverse speed and the wire diameter are the second and the third effective parameters. However, in terms of the produced wires ultimate pressure strength, the traverse speed is the most dominant factor rather than the rotational speed. The optimum values for the rotational speed, the traverse speed, and the wire diameter are 500 r/min, 31.5 mm/min, and 6 mm, respectively, and the produced wire, by these optimum parameters, presents 14.17 µm, 127.1 HV, and 904.7 MPa for the grain size, the microhardness, and the ultimate pressure strength, respectively.

采用摩擦搅拌反挤压法从其切屑生产黄铜丝，然后使用田口L9正交试验设计优化工艺参数。转速、横动速度和生产线径是考虑的参数。最佳工艺参数是根据生产样品的晶粒尺寸、显微硬度和极限压力强度确定的。通过使用最佳参数进行确认测试来确认输出参数的预测最佳值。方差分析表明，转速是决定所生产线材晶粒度和显微硬度的最主要因素，刀具横移速度和线材直径是第二和第三个有效参数。然而，就生产线材的极限压力强度而言，横动速度是最主要的因素，而不是转速。转速、横动速度和线径的最佳值分别为 500 r/min、31.5 mm/min 和 6 mm，并且根据这些最佳参数，生产的线材呈现 14.17 µm、127.1 HV、晶粒尺寸、显微硬度和极限压力强度分别为 904.7 MPa 和 904.7 MPa。