深入分析了有机物切割刀具用钢的使用性能要求及相应的力学性能要求,为获得优异的切割性能,有机物切割刀具用钢必须具备超高的刀口硬度及刃口锋利性,并具有适当的韧性。由此分析了有机物切割刀具用钢的合金化原理与强韧化原理。为获得良好的刃口锋利性,必须采用高碳低合金或非合金钢。设计了一种有机物切割刀具用钢,采用特殊热处理工艺,通过高碳马氏体强化以及微细弥散的合金渗碳体沉淀强化可显著提高钢的硬度实现超硬化,而通过合金渗碳体及VC联合阻止晶粒长大产生明显的晶粒细化效果可提高钢的韧性。
Abstract; The performance and related mechanical property requirements for the organic matter cutting tool steel have been analyzed in detail. In order to obtain superior cutting performance, the steel must have ultra-high blade hardness, sharpness and suitable toughness. Therefore, based on the requirements, the alloying principle and strengthening and toughening principle for organic matter cutting tool steel were analyzed. Excellent cutting edge sharpness has to be obtained by high-carbon low-alloy or non-alloy steels. Here a kind of organic matter cutting tool steel was designed using special heat treatment and via high-carbon martensitie hardening and precipitation strength- ening of dispersed fine alloyed eementite the hardness of steels can be increased obviously. Whereas the toughness of steels can be increased by grain refinement which is derived from alloy cementite and VC impeding grain growth.
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