【摘要】 等温淬火球墨铸铁(ADI)具有多方面优越的性能特点,然而,单纯的等温淬火难以同时具有高强度、高硬度及高的韧性与塑性。为了进一步扩大ADI的应用范围,采用不同的表面高频淬火工艺考察了ADI表面热处理的可行性,并着重探讨了不同表面处理工艺对ADI表层组织及硬度的影响规律。研究表明,对ADI采用二步法表面热处理可以得到理想的效果。更多还原

【Abstract】 Austempered ductile iron(ADI) has many exceptional properties.However,by single austempering process,it is hard to acquire the property that combines high hardness,high strength with high toughness and high plasticity.In order to enlarge the applied range of ADI,we explored the feasibility of surface heat treatment by two different processes of high-frequency quenching for ADI.Especially,we discussed the effects of different surface heat treatments on the surface microstructure and hardness of ADI.It shows that the property is considerably improved by two-step high-frequency quenching process.更多还原