TiC/Cr_(18)Ni_8钢结硬质合金的制备及硼与钼对其组织和性能的影响  

PREPARATION OF TiC/Cr_(18)Ni_8 STEEL BONDED CARBIDES AND INFLUENCE OF MOLYBDENUM AND BORON ON MICROSTRUCTURE AND PERFORMANCE

作　　者：宋桂香[1] 刘均海[2] 黄继华[1] 张建纲[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]威海职业学院机电工程系,威海264200

出　　处：《粉末冶金工业》2005年第4期11-16,共6页Powder Metallurgy Industry

摘　　要：以钛铁粉、铬铁粉、铁粉、胶体石墨等为原料,原位反应合成了TiC/不锈钢钢结硬质合金,并用扫描电镜(SEM)、X射线衍射等测试方法对所制备的试样进行了组织结构分析。研究结果表明:钢结硬质合金主要相组成为TiC+Fe-Cr-Ni固熔体,TiC颗粒较为细小,形状较为规则,最大约2μm,大部分在1μm以下。随烧结温度升高,钢结硬质合金的密度和硬度增加,添加硼和钼提高了钢结硬质合金的密度和硬度。TiC/stainless steel bonded carbide was in situ synthesized by sintering compacts of mixed ferrotianium, ferrochromium,iron and carbon powders.The microstructure of steel bonded carbide was analyzed by scanning electron microscope（SEM）and X-ray diffraction （XRD）.The results showed that the synthesized steel bonded carbide consists of fine TiC particles and Fe-Cr-Ni solid solution as binder phase.The TiC particles are fine and less than 1 μm. The density and hardness of carbide increase with sintering temperature. The addition of molybdenum and boron is beneficial to the densification of carbide,refinement and uniform distribution of TiC particles.

关 键 词：钢结硬质合金 原位反应合成 不锈钢 TIC 

分 类 号：TG135.5[一般工业技术—材料科学与工程]