以紫钨为原料制备超细WC-Co硬质合金

超细硬质合金具有高硬度、高耐磨性等优异性能,保证超细硬质合金的晶粒度小而且均匀的一个关键因素就是以粒度细小、分布均匀的超细WC粉末为原料。超细WC粉末的制备过程中,常用的氧化物原料为蓝钨,以紫钨为原料的制备工艺报道较少。采用相同的工艺,分别以蓝钨和紫钨为原料制备出超细WC粉末,并采用相同工艺制备出超细硬质合金,对两种产品性能进行对比,发现以紫钨为原料制备出的超细硬质合金晶粒度小,强度和硬度高,具有较好综合性能。

On Ultrafine Cemented Carbide Manufacture by Using Purple Tungsten Oxide as Raw Material

Ultrafine cemented carbide demonstrates a superior combination of higher wear resistance and higher hardness.The key factor to obtain ultra-fine carbides with pure,fine and homogeneous grain is using finer starting tungsten carbide powder with tight particle size distribution.Two kinds of ultra-fine carbides were synthesized by adopting blue and purple tungsten oxides as raw materials respectively. And, after contrasting the properties of the two kinds of alloy,it was concluded that the alloy using purple tungsten oxide as raw material has better over-all properties with smaller grain size, higher strength and hardness.