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前言相对于以碳化钨为基的硬质合金来讲,金属陶瓷*则是以碳化钛为基的。它的硬度、高温强度、耐氧化和化学稳定性都非常好。金属陶瓷作为切削工具而言,如上所述,由于它具有较好的耐热性、耐磨性、耐腐蚀、耐氧化以及其它金属的反应稳定性等优点,现已被用于高速切削领域。可是从前由于它韧性低,在轻、重切削(有黑皮、偏心切削等)时也会打刀,结果只能用于精加工。近来由于粉末冶金的不断进步。金属陶瓷硬质相分散于粘结相中的金属学研究工作的进展,即分散二相系材料的破坏机理已有所掌握;由于对金属陶瓷中
Preface Titanium carbide is based on titanium carbide relative to tungsten carbide-based cemented carbide. Its hardness, high temperature strength, oxidation resistance and chemical stability are very good. As a cutting tool, as mentioned above, cermet has been used in the field of high-speed cutting because of its good heat resistance, wear resistance, corrosion resistance, oxidation resistance and reaction stability of other metals. But in the past because of its low toughness, the light, heavy cutting (black, eccentric cutting, etc.) will also hit the knife, the result can only be used for finishing. Recently due to the continuous improvement of powder metallurgy. Metallocene hard phase dispersed in the binder phase of the progress in the study of metallography, that is, the disintegration mechanism of dispersed two-phase materials have been mastered; due to the metal-ceramic