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采用光学显微镜、拉伸试验机和扫描电镜对比研究了未处理、脉冲磁场处理、机械振动处理和脉冲磁场-机械振动复合处理条件下H62黄铜的晶粒尺寸和力学性能,考察了复合处理条件下脉冲电压、脉冲频率和铸型预热温度对H62黄铜晶粒尺寸和力学性能的影响。结果表明,脉冲磁场-机械振动复合处理可以显著细化H62黄铜晶粒和提高力学性能,且效果均好于单一的脉冲磁场处理或机械振动处理,其抗拉强度和伸长率分别提高了9.7%和14.6%。随着脉冲电压或脉冲频率的增加,黄铜的晶粒尺寸逐渐减小,其力学性能也随之提高。
The grain size and mechanical properties of H62 brass under untreated, pulsed magnetic field, mechanical vibration and pulsed magnetic field-mechanical vibration were studied by optical microscopy, tensile testing machine and scanning electron microscope. The effects of composite treatment conditions The effect of pulse voltage, pulse frequency and preheating temperature on the grain size and mechanical properties of H62 brass was investigated. The results show that the pulsed magnetic field - mechanical vibration composite treatment can significantly refine the H62 brass grain and improve the mechanical properties, and the effect is better than the single pulse magnetic field treatment or mechanical vibration treatment, the tensile strength and elongation increased by 9.7 % And 14.6%. With the increase of pulse voltage or pulse frequency, the grain size of brass decreases gradually, and its mechanical properties also increase.