烧结温度对Ti(CN)基金属陶瓷成分和显微结构的影响  

Effects of Sintering Temperature on the Component and Microstructure of Ti(CN) Based Cermets

作　　者：周书助[1] 彭卫珍[2] 王社权 

机构地区：[1]湖南工业大学材料系,湖南株洲412000 [2]株洲硬质合金集团有限公司,湖南株洲412000 [3]株洲钻石切削刀具股份有限公司,湖南株洲412007

出　　处：《硬质合金》2008年第3期131-134,共4页Cemented Carbides

摘　　要：本文采用化学分析、扫描电镜(SEM)、能谱(EDS)、X射线衍射(XRD)、多气氛脱胶-烧结一体炉等方法和手段,对Ti(CN)基金属陶瓷压坯在不同温度烧结过程中的化学成分变化,相成分变化、显微组织演变和压坯收缩等进行了系统的研究。在Ti(CN)基金属陶瓷烧结过程中,碳含量和氧含量在1100～1300℃之间快速降低,在1300℃时形成氮分解峰,在液相出现后,氮分解基本上停止,当烧结温度在1500℃以上时,氮的分解加快。TaC相和Mo2C相在1200℃消失,WC相在1300℃消失。因此认为,在800～1350℃之间固相烧结阶段,必须控制好升温速度,最好分段保温;烧结温度不能超过1500℃。In this paper, the change of chemical composition, phase composition, microstructure evolvement and compact shrinking of cermets in de-gummlng in H2 or in vacuum and in sintering in vacuum were studied systematacially, using chemical analysis, scanning electron microscope （SEM）, spectra analysis （EDS）, X-ray diffraetory （XRD）, multi-atmosphere sintefing furnace. The content of carbon and oxygen was decreased sharply at 1100-1300℃; the decomposition peak of nitrogen appeared at 1300℃. When the appearance of liquid phase, the decomposition of nitrogen was inhibited, the decomposition of nitrogen began again when the sintering temperature above 1500℃. TaC and Mo2C disappeared at 1200℃, WC disappeared at 1300~G. So the rate of rise must be controlled between 800-1350℃, it is best holding at different temperature level; the sintefing temperature can not be exceeded 1500℃.

关 键 词：Ti(CN)基金属陶瓷 烧结 化学成分 显微结构 

分 类 号：TG148[一般工业技术—材料科学与工程]