中文摘要：

为解决单晶金刚石切削黑色金属时产生严重磨损这一制造领域难题，对工件表面改性方法进行了深入研究，并探索了新的金刚石可切削材料．对有限厚度的纯铁进行了气体渗氮，并用X射线衍射分析法对渗层进行了物相表征．渗氮纯铁的金刚石可切削性实验结果表明，以氮化铁为主要成分的化合物是一种适于镜面加工的潜在材料（Ra＜10nm）；在此研究基础之上，提出了整体单相可控氮化铁粉末冶金钢这一新型模具材料，初步切削实验证明其具有较好的金刚石可切削性，后刀面磨损VB值仅为1.16μm．

英文摘要：

To reduce catastrophic diamond tool wear when conventionally machining ferrous metals,the method of surface modification was thoroughly investigated and a novel suitable-for-diamond-cutting material was explored.A pure iron sample of limited thickness was gas nitrided and characterized by X-ray diffraction analysis. The result of diamond turnability of nitrided pure iron shows that the compound layer consisting of iron nitride is a potential mate-rial suitable for diamond cutting（Ra〈10nm）. Based on nitrided pure iron,powder-sintered iron nitride was pro-posed for mould manufacturing on which nanometric surface quality can be obtained via diamond cutting. Experimen-tal study of powder-sintered iron nitride shows good diamond turnability with only a flank wear VB of 1.16μm.