摘要
碳化钨粉末是WC基硬质合金的主要生产原料之一。氧含量增加是碳化钨粉末在保存过程中的主要失效形式之一,因此测定碳化钨粉末氧化激活能的大小对评价粉末的抗氧化性能存在重要意义。本文提供了一种利用热重分析仪准确测定氧化激活能数值的简易方法,并对费氏粒度为2.06μm和1.54μm的两种常见中粒度碳化钨粉末样品的氧化激活能进行了测定。我们还对多个费氏粒度为亚微细级别的定制碳化钨粉末样品的氧化激活能进行了测定,并对生产条件影响粉末氧化激活能的规律进行了分析总结。
Tungsten carbide powder is one of the primary raw materials of cemented tungsten carbide with substrates of WC. The increase of oxygen content is one of the principal failure types for tungsten carbide powder in storage, and it is important to measure the activation energy for oxidation of tungsten carbide powder for estimation of oxidation resistance. In this paper, we provide a simple method for accurate determination of the activation energy for oxidation of tungsten carbide powders by using thermogravimetric analyzer, and test the activation energy for oxidation of two medium-size tungsten carbide powder samples, the Fisher sub-sive size (FSSS) of which are 1.54μm and 2.06μm. We also test the activation energy for oxidation of several custom-made tungsten carbide powder samples, and analyze the relationship between the manufacturing condition and the activation energy.
作者
吴高潮
Wu Gaochao(Xiamen Tungsten Co.,Ltd.,Xiamen 361004,Fujian)
出处
《福建冶金》
2021年第6期20-24,共5页
Fujian Metallurgy
关键词
硬质合金
碳化钨粉末
氧化激活能
cemented tungsten carbide
tungsten carbide powders
activation energy for oxidation
