超细硬质合金钴相分布均匀性对PCB铣刀使用性能的影响  

Influence of Cobalt Phase Distribution Uniformity in Ultrafine Cemented Carbides on Performance of PCB Milling Cutters

作　　者：凌平 曾瑞霖 廖杰培 方啸林 Ling Ping;Zeng Ruilin;Liao Jiepei;Fang Xiaolin(Shenzhen Jinzhou Precision Technology Co.,Ltd.,Shenzhen Guangdong 518100,China;State Key Laboratory of Cemented Carbide,Zhuzhou Hunan 412000,China;Zhuzhou Cemented Carbide Group Co.,Ltd.,Zhuzhou Hunan 412000,China)

机构地区：[1]深圳市金洲精工科技股份有限公司,广东深圳518100 [2]硬质合金国家重点实验室,湖南株洲412000 [3]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3期190-195,共6页Cemented Carbides

基　　金：国家重点研发计划项目(2022YFB3806700)。

摘　　要：将钴质量分数为6%的3种钴相均匀性不同的超细硬质合金棒材制成PCB铣刀,对3种超细硬质合金棒材及PCB铣刀样品进行物理力学性能、显微组织结构和铣刀使用性能的对比,使用ICALIBUR钴相分析软件定量分析硬质合金棒材钴相分布均匀性,研究钴相分布均匀性对PCB铣刀使用性能的影响。结果表明:钴相分布均匀性在物理力学性能上没有体现,只能通过直接的钴相分布检测方法进行检测,钴相分析软件检测显示,钴相质量分数在5%~7%的微区间,样A为50%,样B为66%,样C为80%。制成PCB铣刀后,钴相均匀性较差的样A、样B比钴相均匀性较好的样C寿命低20%以上。钴相分布均匀性差会造成硬质合金棒材制成的铣刀刃局部区域的硬度不均匀,使得铣刀在使用过程中产生磨损不均匀和崩缺现象,导致使用寿命降低。Three types of ultrafine cemented carbide rods with different cobalt phase uniformity and a cobalt mass fraction of 6%were made into PCB milling cutters.The physical and mechanical properties,microstructure,and milling cutter performance of the three types of ultrafine cemented carbide rods and PCB milling cutter samples were compared.The cobalt phase distribution uniformity of the cemented carbide rods was quantitatively analyzed using ICALIBUR cobalt phase analysis software,and the influence of cobalt phase distribution uniformity on the performance of PCB milling cutters was studied.The results indicate that the uniformity of cobalt phase distribution is not reflected in the physical and mechanical properties and can only be detected through direct cobalt phase distribution detection methods.The detection of cobalt phase analysis software shows that the mass fraction of the cobalt phase is in the range of 5%~7%.Sample A is 50%;sample B is 66%,and sample C is 80%.After the PCB milling cutter is made,the life of sample A and sample B with poor cobalt phase uniformity is more than 20%lower than that of sample C with better cobalt phase uniformity.Poor cobalt phase distribution uniformity can cause uneven hardness in the local area of the cutting edge of milling cutters made of cemented carbide rods,resulting in uneven wear and chipping during use,leading to reduced service life.

关 键 词：硬质合金棒材 钴相分布均匀性 钴相分析软件 铣刀 显微组织 

分 类 号：TG135.5[一般工业技术—材料科学与工程] TG714[金属学及工艺—合金]