纳米WC-10Co硬质合金粉末的低压烧结

The low-pressure sintering of nanostructured WC-10Co composite powder prepared by high energy ball milling

采用低压烧结法制备了纳米WC-10Co硬质合金,研究了烧结温度对烧结体的晶粒、密度及硬度的影响.研究表明,随着烧结温度的降低,烧结体WC的晶粒长大不明显,同时烧结体的密度和硬度都随之增大.当烧结温度为1320℃时,WC-Co烧结体的晶粒约为200 nm,硬度HRA为94.6,可获得致密的WC-Co硬质合金.

WC-10Co cemented carbide prepared by high energy ball milling is made by low-pressure sintering. It was studied the temperature can effect the sintering crystal grain, density and hardness. It shows the diameter size of sintering crystal grain is getting smaller when the sintering temperature is lower. Meanwhile, the cemented carbide density and hardness is becoming larger. The diameter size and hardness of sintering crystal grain are about 200 nm and HRA 94. 6 respectively in 1320℃ which can get the compact WC-Co cemented carbide.