WC/Co类硬质合金粉末在烧结工艺前的增氧途径  

THE MECHANISM OF OXYGEN INCREAS OF WC/Co HARD ALLOY POWDER BEFORE SINTERING PROCESS

作　　者：颜杰[1] 邵旭[1] 唐楷[1] 王秀丽[1] 李国生[1] 张浩[1] 

机构地区：[1]四川理工学院材料与化学工程学院,四川自贡643000

出　　处：《粉末冶金工业》2011年第1期33-39,共7页Powder Metallurgy Industry

摘　　要：本文以自贡兴达特种粉末冶金厂提供的YG10硬质合金粉末以及其原料钴粉作为研究对象,其中钴颗粒粒径均为微米级。通过对YG10硬质合金粉末以及其原料钴粉中Co2+含量的检测,来研究表面活性剂硬脂酸、空气量、储存时间、储存条件,对钴发生增氧副反应的影响。发现:在自然条件下钴颗粒可以与空气中的氧气自发发生氧化还原反应而引入氧元素,也可能与硬脂酸发生反应,使合金粉末含氧量增高;钴颗粒被空气中的氧气氧化短期内未发现终止;钴颗粒表面的硬脂酸钴可能阻止钴颗粒与硬脂酸的进一步反应,但并不阻止氧气与钴颗粒表面的反应。Researchs in this study are based on the YG10 hard alloy powder and micrometer sized Co powder fram Zigong Xingda special powder metallurgy plant. This paper studied the influences of surfactant C17 H35 COOH, amount of air, time and storage conditions on oxygen jncveage of Co powder by analyzing the amount of oxygen in YG10 hard alloy＇s powder and raw material Co. It was found that Co particles could cause oxygen increase through reaction with oxygen in the air spontaneously and with C17 H35 COOH as well. The reaction with oxy- gen would not stop in the short run.

关 键 词：WC/Co类硬质合金 硬脂酸 氧气 氧化还原反应 增氧过程 

分 类 号：TF124.5[冶金工程—粉末冶金]