球磨时间、料浆料液比对WC-8%Co超粗晶硬质合金钴池与性能的影响  

Effect of Ball Milling Time and Slurry-Liquid Ratio on Cobalt Pool and Properties of WC-8%Co Ultracoarse-Grained Cemented Carbide

作　　者：刁椿珉 谭千榆 张洪刚[1] 李明泽 Diao Chunmin;Tan Qianyu;Zhang Honggang;Li Mingze(Zigong Cemented Carbide Corp.,Ltd.,Zigong Sichuan 643011,China)

机构地区：[1]自贡硬质合金有限责任公司,四川自贡643011

出　　处：《硬质合金》2023年第4期296-301,共6页Cemented Carbides

摘　　要：超粗晶硬质合金生产过程中容易产生钴池。采用喷雾干燥制粒工艺制备了WC-8%Co超粗晶硬质合金,研究球磨时间、料浆料液比对钴池及合金性能的影响。结果表明:延长球磨时间、增大料浆料液比均有利于消除超粗硬质合金中的钴池;在球磨时间12 h、料浆料液比8.95 kg/L条件下,制备的平均晶粒度为7.36μm的超粗硬质合金中未出现钴池,合金的磁力为3.8 kA/m,抗弯强度为1820 N/mm^(2);在球磨时间16 h、料浆料液比5.20 kg/L条件下,制备的平均晶粒度为5.37μm的超粗硬质合金中未见钴池,钴相分散更均匀,合金的磁力4.2 kA/m,抗弯强度为2230 N/mm^(2)。For the problem of cobalt pool in the production process of ultracoarse-grained cemented carbide,WC-8%Co ultracoarse-grained cemented carbide was prepared by spray drying granulation process,and the effects of the ball milling time and slurry-liquid ratio on cobalt pool and properties of the alloy were analyzed.The results show that the cobalt pool of ultracoarse cemented carbide can be eliminated by prolonging the ball milling time and increasing the slurry-liquid ratio.Under the conditions of a ball milling time of 12 h and a slurry-liquid ratio of 8.95 kg/L,ultracoarse cemented carbide with an average grain size of 7.36μm is prepared,and the cobalt pool is not observed.The magnetic force of the alloy is 3.8 kA/m,and the transverse fracture strength reaches 1820 N/mm^(2).Under the condition of a ball milling time of 16 h and a slurry-liquid ratio of 5.20 kg/L,ultracoarse cemented carbide with an average grain size of 5.37μm is prepared,and the cobalt pool is not observed.The cobalt phase is more evenly dispersed,and the alloy has a magnetic force of 4.2 kA/m and a transverse fracture strength of 2230 N/mm^(2).

关 键 词：超粗晶硬质合金 钴池 料液比 球磨时间 物理力学性能 

分 类 号：TG135.5[一般工业技术—材料科学与工程]