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目前,陶瓷刀具基本有两种,一种是Al_2O_3系陶瓷,主要用于铸铁的精车;一种是Al_2O_3—TiC 系复合材料,主要用于高硬度难切削材料的精车。近年来,由于难切削材料高效率切削的要求日益迫切,所以希望研制出能改进这两种陶瓷刀具耐磨性和抗崩刃性,强度和抗热冲击性都十分出色的工具材料。1、新型陶瓷工具材料的研制在研制Al_2O_3—TiC 系的代用材料时,应在重视决定工具性能的主要因素——高温硬度和抗热冲击性的前提下,研制比TiC 更为出色的化合物。通过对各种碳化物、氮化物及硼化
At present, there are basically two kinds of ceramic knives, one is Al 2 O 3 series ceramics, mainly used for the finishing of cast iron; one is Al 2 O 3 -TiC composite materials, mainly for high hardness difficult to cut materials, fine car. In recent years, due to the increasing demand for efficient cutting of difficult-to-cut materials, it is hoped that tool materials that can improve the wear resistance and chipping resistance, strength and thermal shock resistance of both ceramic tools are expected to be developed. 1, the development of new ceramic tool materials In the development of alternative materials Al_2O_3-TiC system, should pay attention to determine the main factor in tool performance - high temperature hardness and thermal shock under the premise of the development of more excellent than TiC compounds. Through the various carbides, nitrides and boride