利用自蔓延高温合成工艺在铸钢表面制备TiC/Fe复合材料层  

Preparation of TiC/Fe Composites on Cast Steel Surface by SHS

作　　者：纪朝辉[1] 王志平[1] 丁坤英[1] 

机构地区：[1]中国民航大学理学院,天津300300

出　　处：《铸造》2007年第8期834-836,共3页Foundry

摘　　要：在干砂消失模铸造模样表面涂敷一层经压实的自蔓延高温合成(SHS)粉料(Ti粉、C粉、Al粉、Fe粉按一定比例配制),浇注过程中钢液自动点燃SHS粉料,使其反应生成增强陶瓷相(TiC)。钢液铸渗到反应后的SHS陶瓷层中,使陶瓷增强相均匀地分散到熔融的表层金属中,从而使铸件表面获得TiC/Fe自生复合材料层。表面复合层硬度可达HRC54～59,经900℃×2h退火后,产生大量细小且弥散的二次TiC颗粒。By coating pressed self-propagating high-temperature synthesis（SHS）powder on the wear resistant surface part of evaporative pattern, the powder can be lit up automatically through touring high temperature molten steel and can form reinforce phase of ceramics（TiC）. At the same time, the molten steel will be introduce into layer of ceramics, which can make the TiC spread around molten steel surface equably, so the autogeny composite layer of casting can be obtained. The hardness of composite layer can reach HRC54-59, and many fine subsidiary TiC grain can be found after 900 ℃×2 h treatment.

关 键 词：干砂消失模铸造 高温自蔓延合成 TIC/FE复合材料 

分 类 号：TG249.5[机械工程—精密仪器及机械]