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通过热压缩实验对HPb59-1黄铜在温度为650～800℃和应变速率为0.1～10s-1下的高温变形行为进行了研究,其真应力-真应变曲线表明:流动应力随着应变速率的降低和温度的升高而降低。通过回归拟合实验数据建立了HPb59-1黄铜高温变形流动应力方程,并进行验证。将建立的流动应力方程嵌入Deform-3D,并对某方法兰件的热挤压成形过程进行数值模拟,研究了该零件热挤压成形规律。最后通过工程实践验证了本研究的有效性,为工程应用提供一定的参考。
The hot deformation experiment of HPb59-1 brass at high temperature of 650-800 ℃ and strain rate of 0.1-10s-1 was carried out. The true stress-true strain curves show that the flow stress increases with the strain rate Lower and lower temperature. By regression fitting experimental data established HPb59-1 brass high temperature deformation flow stress equation, and verified. The established flow stress equation is embedded in Deform-3D, and the hot extrusion forming process of a certain method flange is numerically simulated. The hot extrusion forming rule of the part is studied. At last, the validity of this study is verified through engineering practice, which provides a reference for engineering application.