基于模糊PID温度控制的锻造AZ61镁合金性能研究

Study on Properties of Forged AZ61 Magnesium Alloy Based on Fuzzy PID Temperature Control

采用三种不同方式对AZ61镁合金锻造温度进行了控制,测试和分析了锻件的力学性能、磨损性能和显微组织。结果表明,锻造温度的模糊PID控制有助于细化锻压态AZ61镁合金晶粒,提高合金的强度和磨损性能。与无PID控制相比,模糊PID控制获得的锻态AZ61镁合金抗拉强度增大24MPa(从290MPa增加到314MPa),屈服强度增大26MPa(从185MPa增加到211MPa),磨损体积减小22×10^-3mm^3(从42×10^-3mm^3减小到20×10^-3mm^3),平均晶粒尺寸减小9.3μm(从17.4μm减小到8.1μm)。

The forging temperature of AZ61 magnesium alloy was controlled by using three different ways.The mechanical properties,wear properties and microstructure of the forgings were tested and analyzed.The results show that the fuzzy PID control of the forging temperature can help to refine the grain of the AZ61 magnesium alloy in forging state and improve the mechanical and wear properties of the alloy.Compared with that by no PID control,the tensile strength of the forged AZ61 magnesium alloy increases by 24 MPa (from 290 MPa to 314 MPa),the yield strength increases 26 MPa (from 185 MPa to 211 MPa),the wear volume decreases by 22×10^-3mm^3(from 42×10^-3mm^3 to 20×10^-3mm^3),and the average grain size decreases by 9.3μm (from 17.4μm to 8.1μm).