摘要
A super-high temperature furnace was developed to fabricate spheroidal cast tungsten carbide powder with excellent flowability and fine feathery structure in a large scale. Optical microscope and scanning electron microscope were taken to characterize the morphology and microstructure of cast tungsten carbide powder. X-ray diffractometry was used to analyze the phase composition of powders involved. It is found that the carbon potential in the furnace and feeding speed play an important role on the microstructure, morphology and properties of the spheroidal cast tungsten carbide powder. As carbon potential is between 0.3% and 0.9% in the furnace, cast tungsten carbide powder with hardness over 2800(HV0.5), flowability over 7.1 s/50 g and tap density over 10.3 g/cm3 is obtained.
A super-high temperature furnace was developed to fabricate spheroidal cast tungsten carbide powder with excellent flowability and fine feathery structure in a large scale. Optical microscope and scanning electron microscope were taken to characterize the morphology and microstructure of cast tungsten carbide powder. X-ray diffractometry was used to analyze the phase composition of powders involved. It is found that the carbon potential in the furnace and feeding speed play an important role on the microstructure, morphology and properties of the spheroidal cast tungsten carbide powder. As carbon potential is between 0.3% and 0.9% in the furnace, cast tungsten carbide powder with hardness over 2800(HV_(0.5)), flowability over 7.1 s/50 g and tap density over 10.3 g/cm^3 is obtained.
出处
《中国有色金属学会会刊：英文版》
CSCD
2005年第2期270-274,共5页
Transactions of Nonferrous Metals Society of China
关键词
精细羽状结构
超高温炉
工艺参数
流动性
球状碳化钨熔炼
spheroidal cast tungsten carbide
fine feathery structure
processing parameter
flowability
