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采用超细颗粒(0.35μm)钨粉与不同粒径(0.1,0.3,0.8,4.5μm)的碳黑粉,按W+C =WC的反应式配碳,在氢气保护下,于830~1300℃保温40min,研究碳黑粒径、碳化温度对WC粉的化合碳含量及物相组成的影响.XRD分析物相组成,用化学分析测定碳含量(质量分数)结果表明:当使用0.1μm的超细碳黑,温度大于930℃时,WC粉的含碳量可达理论含量.但是在此温度下,随着使用的碳黑粒径增大,WC粉中的化合碳含量急速下降,例如在950℃下,使用0.3μm的碳黑只能使WC粉化合碳达到5.2%,使用0.8 μm碳黑时,WC的化合碳为3.18%.
Ultrafine particles (0.35μm) tungsten powder and different particle sizes (0.1,0.3,0.8,4.5μm) of carbon black powder, according to the W + C = WC reactive carbon with hydrogen protection Under the temperature of 830 ~ 1300 ℃ for 40min. The effects of carbon black size and carbonization temperature on the carbon content and phase composition of WC powder were studied. XRD analysis of the phase composition, the chemical analysis of carbon content (mass fraction) The results show that: when the use of ultrafine carbon black 0.1μm, the temperature is greater than 930 ℃, WC powder up to the theoretical content of carbon content. However, at this temperature, as the particle diameter of the carbon black used increases, the content of the carbon compound in the WC powder rapidly decreases. For example, at 950 ° C, the carbon powder of 0.3 μm can only make the carbon powder of the WC powder 5. 2%, when using 0.8 μm carbon black, the carbon content of WC is 3.18%.