综述了超细氮化铬粉体的用途、制备方法，着重介绍了近年来超细氮化铬粉体的制备方法的研究进展，分析了各种方法的利弊以及以后的研究方向。
The application and preparation of ultra-fine chromium nitride powders are presented. Specially, the progress in preparation technique is reviewed. with evaluation and directions for further study.
四螺纹口按国际标准化制造，材料选用38铬钼铝氮化钢，硬度高，使用寿命长。
4 , screw thread gob produced by internation standard , material is 38chrome molybdenum aluminium azote steel , high rigidity , long time.
四螺纹口按国际标准化制造，材料选用38铬钼铝氮化钢，硬度高，使用寿命长。
4 , screw thread gob produced by internation standard , material is 38chrome molybdenum aluminium azote steel , high rigidity , long time.
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