高速钢刃具低温处理改性机理的研究

讨论了高速钢刃具低温处理改性的机理。从宏观机械性能的测定和微观组织结构和变化来观察分析，得知低温处理工件使用寿命成倍提高的主要原因在于其组织细化，从而获得韧性和耐磨性增强的结果，据此，在实用上，对新材料以微观组织是否细化来判定低温改性的可能性；以耐磨性（或韧性）的变化来预测改性程度。

Research on the Mechaism Extending the Service Life of High-Speed Steel-Made Cutting Tools by Cryogenic Treatment

The paper deals particularly with the mechanism extending the service life ofhigh-speed steel-made cutting tools by cryogenic treatment.Through rneasuring the micro-scopic characters of machines and analysing the changes in microstructure, the principal rea-son that the qervice life of cutting tools is extended two or three times after cryogenic treat-ment consists in that their organized structure has been fined, therefore their toughness andwearability have been improved. In practice,the possibility of cryogenic treatment to new ma-terials is judged by whether or not their organized structure is fined,and the resuIt of treat-ment is estimated by the varieties of their wearability(or toughness).