微量铁对YG8硬质合金硬度、磁性能及孔隙度的影响  

Effect of Small Amount of Fe on Properties of WC-Co Cemented Carbide

作　　者：朱立荣[1] 赵声志[1] 张颢[1] 邓红艳[1] 

机构地区：[1]株洲硬质合金集团公司,湖南株洲412000

出　　处：《硬质合金》2013年第1期41-45,共5页Cemented Carbides

摘　　要：以钨粉筛上物制备的碳化钨为研究对象,采用湿磨、压制、真空烧结制备了YG8硬质合金,研究了WC中铁含量分别为0.33%和1.08%时,其加入量对YG8硬质合金矫顽磁力、钴磁、硬度及微观组织的影响规律。研究结果表明:含微量Fe的WC粉末结晶不完整、团聚严重;随着铁含量的增加,硬质合金的密度逐渐下降,而钴磁逐渐增加;随着铁含量的增加,硬质合金的矫顽磁力和硬度先下降再增加;当铁含量增加到一定值时硬质合金的孔隙度开始明显增加。当硬质合金中铁含量控制在0.3%以下时,可烧结出致密化程度高的YG8硬质合金,其孔隙度达到A02B00。The tungsten carbides with 0.33% and 1.08%Fe （mass fraction） were adopted to prepare YG8 cemented carbide by means of wet milling, pressing and sintering. The effect of iron on properties, such as cobalt magnetism and coercive force, hardness and microstructure, of YG8 alloy was investigated. The results show that the morphology of WC powder containing Fe is not good, and serious agglomeration is found. With the increase of iron content, the density gradually decreases, while the cobalt magnetism gradually increases. With the increase of iron content, coercive force and hardness first decrease and then increase. When the iron content is increased to a certain value, the porosity significantly increases. When the content of iron in the cemented carbide is below 0.3%, the porosity obviously reduces and amounts to A02B00.

关 键 词：硬质合金 碳化钨 铁 性能 

分 类 号：TG135.5[一般工业技术—材料科学与工程]