尽管经典的碳化钛(TiC)基硬度合金(或称之为“金属陶瓷”)在众多的切削工具材料中占有一席重要的位置,但与WC—Co硬质合金比较起来,它的强度和韧性,尤其是抗塑性变形性均不及后者,因而其应用领域受到一定的限制。七十年代以来,围绕着克服TiC基硬质合金的缺点,人们除了坚持不懈地寻求常规手段的完善外,还力图通过“合理的搭配”找出更为理想的化学组成,以从根本上改善TiC基合金的各种性能。在为此目的所进行的许多有益尝试中,碳氮化钛(TiCN)基硬质合金的问世可认为是一个最成功的范例。 Although the classic TiC-based hard alloys (or “cermets”) hold an important place in a wide range of cutting tool materials, their strength and toughness, as compared to WC-Co cemented carbide, , Especially plastic deformation resistance are less than the latter, so its application is subject to certain restrictions. Since the 1970s, in order to overcome the shortcomings of TiC based cemented carbides, in addition to tirelessly pursuing the improvement of conventional methods, people also sought to find out more ideal chemical compositions through “reasonable collocation” to fundamentally improve TiC-based alloys of various properties. Of the many helpful attempts to accomplish this end, the advent of titanium carbonitride (TiCN) -based cemented carbide is considered to be one of the most successful examples.