气流破碎技术在超细WC粉体制备中的应用  

Application of Jet Milling Technology in Preparation of Ultrafine WC Powder

作　　者：李剑峰 马赛 阳冬元[2] 刘超 罗劲松[2] 吴育藩 曾瑞霖 Li Jianfeng;Ma Sai;Yang Dongyuan;Liu Chao;Luo Jingsong;Wu Yufan;Zeng Ruilin(State Key Laboratory of Cemented Carbide,Zhuzhou Hunan 412000,China;Zhuzhou Cemented Carbide Group Corp.Ltd.,Zhuzhou Hunan 412000,China)

机构地区：[1]硬质合金国家重点实验室,湖南株洲412000 [2]株洲硬质合金集团有限公司,湖南株洲412000

出　　处：《硬质合金》2024年第5期345-352,共8页Cemented Carbides

基　　金：湖南省自然科学基金项目(2022JJ50109);国家重点研发计划项目(2022YFB3806700);湖南省科技创新计划项目(2023RC3238)。

摘　　要：选取06型WC粉末作为研究对象,采用气流粉碎工艺对其进行处理,研究了气流破碎工艺对粉体微观结构形貌、粒度、粒度分布及粉体相关特性的影响,对比了气流破碎工艺与球磨破碎工艺处理WC粉末所得粉体性能的差异。研究结果表明,气流破碎过程中分级轮转速对所制得的WC粉体粒度及均匀性有重大影响,分级轮转速越高,粉体粒度越细小,粒度分布越集中,当分级轮转速≥3 900 r/min时,粉体中≥2μm的颗粒完全消除;但过高的分级轮转速会降低设备产能,当分级轮转速达到4 200 r/min时,设备产能已低至53.8 kg/h,同时会增加粉体的氧含量和杂质含量;相比于球磨破碎,气流破碎所制得的WC粉体粒度分布更加集中,杂质含量更少,且所制得的合金微观组织结构更加均匀,有利于制备高品质的超细晶硬质合金产品。This article selected 06 type WC powder as the research object and processed it by using jet milling technology.The influence of the jet milling technology on the microstructure morphology,particle size,particle size distribution,and related characteristics of the powder was studied.The differences in the properties of WC powder processed with the jet milling technology and the ball milling technology were compared.The research results indicate that the rotational speed of the grading wheel has a significant impact on the particle size and uniformity of the WC powder produced during the jet milling process.The higher rotational speed of the grading wheel indicates a smaller particle size and more concentrated particle size distribution of WC powders.When the rotational speed of the grading wheel is≥3900 r/min,particles with a size of≥2μm are completely eliminated.However,the excessively high rotational speed of the grading wheel will reduce equipment production efficiency.When the rotational speed of the grading wheel reaches 4200 r/min,the equipment production efficiency drops to 53.8 kg/h,while the oxygen and impurity content of the powder is increased.Compared with that produced by ball milling,the WC powder produced by jet milling has a more concentrated particle size distribution and fewer impurity content,and the microstructure of the alloy produced is more uniform.The powder obtained by jet milling is conducive to the preparation of high-quality ultrafine grain cemented carbide products.

关 键 词：WC粉 超细晶硬质合金 气流破碎 球磨破碎 显微组织 

分 类 号：TG1[金属学及工艺—金属学]