前言球墨铸铁过去大多在铸态下使用,现在,通过各种热处理,调整其基体组织,得以适应不同的使用目的,因而更进一步地扩大了该材料的应用范围。其中,贝氏体基体球铁(ADI:Austcmpered Ductile Iron)不仅具有球墨铸铁固有的各种特点,而且向着高强度—高韧性和高强度—高硬度的应用领域不断扩展,已成为调质钢,渗碳淬火钢之类最有希望的替代材料。 Foreword In the past, ductile iron was mostly used under the condition of as-cast. Now, through various heat treatments, the matrix structure can be adjusted to suit different purposes, thus further expanding the application range of the material. Among them, ADI (Austcmpered Ductile Iron) not only has the inherent characteristics of ductile iron, but also to the high strength - high toughness and high strength - high hardness applications continue to expand, has become quenched and tempered steel, Carburized hardened steel such as the most promising alternative materials.