谢丽杰,刘雪梅,王海滨,谢屹峰,刘宝刚,宋晓艳.含WB烧结硬质合金的组织结构和性能研究[J].稀有金属材料与工程,2017,46(12):3825~3831.[Xie Lijie,Liu Xuemei,Wang Haibin,Xie Yifeng,Liu Baogang,Song Xiaoyan.Effect of addition of WB on the microstructure and properties of cemented carbides[J].Rare Metal Materials and Engineering,2017,46(12):3825~3831.]
含WB烧结硬质合金的组织结构和性能研究
投稿时间:2016-09-26  修订日期:2017-02-08
中文关键词:  WB  WCoB化合物  硬质合金  硬度  耐磨性
基金项目:北京市自然科学基金重点项目(2131001)
中文摘要:
      将不同含量的WB粉末添加到传统成分的WC-Co粉末中,利用低压烧结技术制备了系列含WB的WC-Co型硬质合金,并对其物相组成、组织结构和力学性能进行了系统表征分析。研究发现,在低压烧结过程中WB与Co发生反应,生成了具有超高硬度的WCoB相,由此降低了粘结相Co对WC晶粒的隔离,增加了WC晶粒间的接触度,引起合金韧性下降。添加WB制备的硬质合金材料其摩擦系数更低,随WB添加量的增加,硬度和耐磨性明显提高,当WB添加量为30wt%时,制备的硬质合金材料的硬度达到1900kg/mm2,其磨损速率仅为传统WC-Co硬质合金1/10。然而,添加WB的WC-Co合金的断裂韧性约为传统WC-Co硬质合金的83%~91%。
Effect of addition of WB on the microstructure and properties of cemented carbides
英文关键词:WB  WCoB  cemented carbide  hardness  wear resistance
英文摘要:
      Using WB powder and WC-Co powder as raw materials, the cemented carbides with different volume fraction of WB additives were prepared by hot isostatic pressing (HIP) method. Then, the phase constitution, microstructure and mechanical properties of the prepared cemented carbides have been studied. The results show that the super hard WCoB phase is formed by the reaction of WB and Co. With the decrease of Co phase, less WC grains were seperated.. With the increase of the WB addition, the prepared cemented carbides have a lower frictionScoefficients and a better wear resistance and hardness. When the WB addition is 30wt%, the hardness of 1900kg/mm2 can beattained. The abrasion loss of the sample is 1/10 of that of the WC-Co cemented carbide. However, the fracture toughness of the cemented carbide with WB addition is about 83%-91% of that of the conventional WC-Co cemented carbides.
作者单位E-mail
谢丽杰 北京工业大学材料科学与工程学院 15650750961@163.com 
刘雪梅 北京工业大学材料科学与工程学院  
王海滨 北京工业大学材料科学与工程学院  
谢屹峰 洛阳金鹭硬质合金工具有限公司  
刘宝刚 洛阳金鹭硬质合金工具有限公司  
宋晓艳 北京工业大学材料科学与工程学院  
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