中文摘要：

用热等静压（HIP）技术制备了Ti（C，N）基金属陶瓷功能梯度材料，对热等静压氮化处理前后的组织结构、硬度以及密度变化作了比较分析。结果表明：HIP技术能在金属陶瓷表面形成硬质薄膜，表面硬度提高，并且硬度由表及里逐渐减小，这是由于高温高压氮化处理使材料中的孔洞闭合，微裂纹和缺陷的减少使得材料性能显著提高。

英文摘要：

The preparation technology of functionally graded （FGM） Ti（C, N）-based cermets was reviewed. The characteristics of microstructure and hardness of the FGM cermets produced by hot isostatic pressing （HIP） technology were summarized. A surface zone rich in titanium and nitrogen was induced hy heat-treatment. Density and hardness were improved and hardness gradient was formed. The high temperature and high pressure N2 made the holes closed and defects vanished, and resulted in a prolonged tool life.