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研究了低压脉冲磁场对ZL108合金组织中共晶Si的细化及磨损性能的影响。结果表明,在磁场作用下,ZL108合金铸态组织中的共晶Si得到显著细化。随着放电频率增加,共晶Si由粗大的针片状转变为细小的短纤维状和颗粒状共存的组织。施加磁场处理后,ZL108合金的耐磨性能显著提高。磨损表面分析表明,未施加磁场处理合金的磨损机制为严重的粘着磨损和磨粒磨损共同作用,施加6Hz磁场处理合金的磨损机制为以磨粒磨损为主并有少量粘着磨损。
The effect of low-voltage pulse magnetic field on the refinement and wear behavior of eutectic Si in ZL108 alloy was studied. The results show that under the action of magnetic field, eutectic Si in the as-cast microstructure of ZL108 alloy is significantly refined. As the discharge frequency increases, eutectic Si transforms from a coarse needle-like shape into a finely short, fibrous, and granular coexisting tissue. After the magnetic field treatment, ZL108 alloy wear resistance significantly increased. The wear surface analysis shows that the wear mechanism of the alloy without magnetic field treatment is the combination of severe adhesive wear and abrasive wear. The wear mechanism of 6Hz magnetic field treated alloy is mainly abrasive wear with a small amount of adhesive wear.