球形铸造碳化钨的制备技术  

Preparative technology of spherical cast tungsten carbide powder

作　　者：李玉玺[1] 贺跃辉[1] 陈楚轩 

机构地区：[1]中南大学粉末冶金国家重点试验室,长沙410083 [2]自贡硬质合金有限责任公司研发中心,自贡643011

出　　处：《粉末冶金材料科学与工程》2006年第6期323-328,共6页Materials Science and Engineering of Powder Metallurgy

摘　　要：介绍了国内外近年来的球形铸造碳化钨生产方法。球形铸造碳化钨制备技术按原料可分为两类,一类以W、WC、C为原料,通过雾化制备,如旋转雾化、超高温熔炼气体雾化等;另一类是以铸造碳化钨为原料,通过高温改性处理制备,如等离子球化法、感应或电阻加热球化法等。无论采用何种方式均能制备出化学性能稳定、显微硬度达3 000 kg/mm2、组织结构均匀致密、100%细等轴树枝状晶粒、流动性能好的球形铸造碳化钨粉末,但因设备、工艺方法等的差异,各种方法均有各自不同的特点。The production methods are summarily introduced for making spherical cast tungsten carbide powder. Presently, two kind of technologies for preparing spherical cast carbide powder are used suitable for different condi tions of raw materials. Firstly, atomizing technology, including rotation atomizing, superhigh temperature remelting gas atomizing, and so on, was used for the mixture of W, WC and C; secondly, high-temperature melting technology, including plasma spheroidization, electric induction or resistance furnace spheroidizing, was used for cast tungsten carbide powder. Any way, both can make spherical cast tungsten carbide powder with 100% fine grain, 3 000 N/mm^2 microhardness, 5-10 s/50 g fluidity and non hypereuteetic and hypoeutectic structures.

关 键 词：硬面材料 球形铸造碳化钨 雾化法 电弧熔炼 快速冷凝 显微硬度 细等轴树枝状 

分 类 号：TF123.31[冶金工程—粉末冶金]