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刁椿珉谭千榆张洪刚李明泽（自贡硬质合金有限责任公司，四川自贡643011）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12h、料浆料液比8.95kg/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3.8kA/m，抗弯强度为1820N/mm2；在球磨时间16h、料浆料液比5.20kg/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4.2kA/m，抗弯强度为2230N/mm2。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EffectofBallMillingTimeandSlurry-LiquidRatioonCobaltPoolandPropertiesofWC-8%CoUltracoarse-GrainedCementedCarbideDiaoChunminTanQianyuZhangHonggangLiMingze（ZigongCementedCarbideCorp.,Ltd.,ZigongSichuan643011,China）ABSTRACTFortheproblemofcobaltpoolintheproductionprocessofultracoarse-grainedcementedcarbide,WC-8%Coultracoarse-grainedcementedcarbidewaspreparedbyspraydryinggranulationprocess,andtheeffectsoftheballmillingtimeandslurry-liquidratiooncobaltpoolandpropertiesofthealloywereanalyzed.Theresultsshowthatthecobaltpoolofultracoarsecementedcarbidecanbeeliminatedbyprolongingtheballmillingtimeandincreasingtheslurry-liquidratio.Undertheconditionsofaballmillingtimeof12handaslurry-liquidratioof8.95kg/L,ultracoarsecementedcarbidewithanaveragegrainsizeof7.36μmisprepared,andthecobaltpoolisnotobserved.Themagneticforceofthealloyis3.8kA/m,andthetransversefracturestrengthreaches1820N/mm2.Undertheconditionofaballmillingtimeof16handaslurry-liquidratioof5.20kg/L,ultracoarsecementedcarbidewithanaveragegrainsizeof5.37μmisprepared,andthecobaltpoolisnotobserved.Thecobaltphaseismoreevenlydispersed,andthealloyhasamagneticforceof4.2kA/mandatransversefracturestrengthof2230N/mm2.KEYWORDSultracoarse-grainedcementedcarbide;cobaltpool;slurry-liquidratio;ballmillingtime;physicalandmechanicalproperties作者简介：刁椿珉（1986...
