x,N1-x)基金屬陶瓷是用不同碳氮比制造的。研究了碳/氮比對(duì)芯-環(huán)結(jié)構(gòu)和金屬陶瓷性能的影響。結(jié)果表明，由于孔太多， Ti(C0.5,N0.5)基金屬陶瓷的性能較差。隨著碳/氮比的增加，白核/灰環(huán)的形成率降低，并且微觀(guān)結(jié)構(gòu)的均勻性增強(qiáng)。因此，基于 Ti(C0.7,N0.3)的金屬陶瓷顯示出優(yōu)異的力學(xué)性能，但有少量的孔隙和較低的相對(duì)密度。與Ti(C0.7,N0.3)基金屬陶瓷相比，TiC基金屬陶瓷在沒(méi)有N元素的情況下具有較高的相對(duì)密度且無(wú)孔隙，但其晶粒較粗大。為了獲得細(xì)晶粒和高密度的顯微組織，將0.25%Cr3C2-0.75%VC（質(zhì)量分?jǐn)?shù)）引入到TiC基金屬陶瓷中，獲得了優(yōu)異的硬度、橫向斷裂強(qiáng)度和韌性。另外，在Ti(C0.7,N0.3)基金屬陶瓷中也添加了0.25%Cr3C2-0.75%VC，但其力學(xué)性能低于Ti(C0.7,N0.3)的金屬陶瓷，這是因?yàn)榧?xì)顆粒和反應(yīng)顆粒與Ti(C,N)發(fā)生了急性固溶反應(yīng)。研究了基于不同C/N比的Ti(Cx,N1-x)基金屬陶瓷的切削性能和摩擦性能。結(jié)果表明，具有0.25%Cr2C3-0.75%VC的TiC基金屬陶瓷在室溫下的摩擦系數(shù)最低，為0.15，在1000 r/min的高速切削過(guò)程中，使用壽命最長(zhǎng)。;Ti(Cx,N1-x)-based cermets are fabricated with different ratios of carbon to nitrogen. The effect of C/N ratio on the core-rim structures and properties of cermets was studied. The results indicate that Ti(C0.5,N0.5)-based cermets possess poor properties due to too many pores. With the increase of C/N ratio, the formation rate of white-core/gray-rims decreases, and the homogeneity of the microstructure is enhanced. Consequently, the Ti(C0.7,N0.3)-based cermets show excellent mechanical properties, but a spot of voids and low relative density. TiC-based cermets with excellent relative density and non-porosity can be achieved in the absence of N element, which have coarser grain compared with Ti(C0.7,N0.3)-based cermets. In order to achieve fine grains and high density microstructure, 0.25wt%Cr3C2-0.75wt%VC is introduced into the TiC-based cermets. Superior hardness, transverse rupture strength and toughness are achieved. In addition, 0.25wt%Cr3C2-0.75wt%VC is also added into the Ti(C0.7,N0.3)-based cermets, but its mechanical properties are lower than that of the Ti(C0.7,N0.3)-based cermets without 0.25wt%Cr3C2-0.75wt%VC addition, which is due to acute solid solution reaction of finer and reactive particles with Ti(C,N). The cutting and friction performances of Ti(Cx,N1-x)-based cermets with different C/N ratios were also investigated. The results show that the TiC-based cermets with 0.25wt%Cr3C2-0.75wt%VC exhibit the lowest coefficient of friction which is 0.15 at the room temperature, and the longest service life during high speed cutting at 1000 r/min."/>