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基于空心氧化铝微球造孔的陶瓷结合剂金刚石砂轮

轩闯 王超超 白福厚 张凤林

轩闯, 王超超, 白福厚, 张凤林. 基于空心氧化铝微球造孔的陶瓷结合剂金刚石砂轮[J]. 金刚石与磨料磨具工程, 2022, 42(4): 442-448. doi: 10.13394/j.cnki.jgszz.2021.4001
引用本文: 轩闯, 王超超, 白福厚, 张凤林. 基于空心氧化铝微球造孔的陶瓷结合剂金刚石砂轮[J]. 金刚石与磨料磨具工程, 2022, 42(4): 442-448. doi: 10.13394/j.cnki.jgszz.2021.4001
XUAN Chuang, WANG Chaochao, BAI Fuhou, ZHANG Fenglin. Vitrified bond diamond grinding wheel based on hollow corundum microspheres[J]. Diamond &Abrasives Engineering, 2022, 42(4): 442-448. doi: 10.13394/j.cnki.jgszz.2021.4001
Citation: XUAN Chuang, WANG Chaochao, BAI Fuhou, ZHANG Fenglin. Vitrified bond diamond grinding wheel based on hollow corundum microspheres[J]. Diamond &Abrasives Engineering, 2022, 42(4): 442-448. doi: 10.13394/j.cnki.jgszz.2021.4001

基于空心氧化铝微球造孔的陶瓷结合剂金刚石砂轮

doi: 10.13394/j.cnki.jgszz.2021.4001
基金项目: 广东省“珠江人才计划”本土创新科研团队项目(2017BT01C169);佛山市核心技术攻关项目(1920001000361)。
详细信息
    作者简介:

    轩闯:

    通讯作者:

    张凤林,男,1972年生,博士、教授。主要研究方向:难加工材料的磨削加工以及超硬材料制品。E-mail:zhangfl@gdut.edu.cn

  • 中图分类号: TG74+3;TQ164

Vitrified bond diamond grinding wheel based on hollow corundum microspheres

  • 摘要: 研究空心氧化铝微球质量分数和粒径(0.2, 0.4, 0.6 mm)对砂轮的总气孔率、抗弯强度、硬度和微观结构的影响,制备以空心氧化铝微球为造孔剂的陶瓷结合剂金刚石砂轮,并研究砂轮对石英玻璃的磨削性能。结果表明:随着空心氧化铝微球质量分数增加,砂轮总气孔率升高,抗弯强度和硬度降低;空心氧化铝微球质量分数相同时,其粒径越小,砂轮的总气孔率越高,抗弯强度和硬度越低;制备的空心氧化铝微球陶瓷结合剂金刚石砂轮可用于磨削石英玻璃,加工后石英玻璃的表面粗糙度从0.5113 μm降至0.0206 μm。

     

  • 图  1  空心氧化铝微球的微观形貌

    Figure  1.  Microstructure of hollow Al2O3 bubble

    图  2  砂轮长条试样

    Figure  2.  Sintered specimen

    图  3  陶瓷结合剂金刚石砂轮

    Figure  3.  Ceramic bonded diamond grinding wheel

    图  4  空心氧化铝微球质量分数对砂轮试样总气孔率的影响

    Figure  4.  Influence of mass fraction of hollow Al2O3 microsphere on the total porosity of grinding wheel specimens

    图  5  空心氧化铝微球质量分数对砂轮试样抗弯强度的影响

    Figure  5.  Influence of mass fraction of hollow Al2O3 microsphere on the flexural strength of grinding wheel specimens

    图  6  空心氧化铝微球质量分数对砂轮试样硬度的影响

    Figure  6.  Influence of mass fraction of hollow Al2O3 microsphere on the hardness of grinding wheel specimens

    图  7  空心氧化铝微球砂轮试样的断面微观结构形貌

    Figure  7.  SEM images of fracture surface of the grinding wheel specimens with hollow Al2O3 microsphere

    图  8  砂轮修整前后表面微观形貌

    Figure  8.  Optical image of diamond grinding wheel before dressing and after dressing

    图  9  磨削加工中空心氧化铝微球作用机理示意图

    Figure  9.  Schematic illustration of the function of hollow Al2O3 microspheres in grinding process

    图  10  石英玻璃磨削前后的表面微观形貌

    Figure  10.  Surface morphology of quartz glass before grinding and after grinding

    图  11  石英玻璃磨削前后三维形貌

    Figure  11.  Three-dimensional morphology of quartz glass before grinding and after grinding

    图  12  陶瓷结合剂金刚石砂轮磨削前后表面微观形貌

    Figure  12.  Microstructure of the surface of the vitrified bond diamond grinding wheel before grinding and after grinding

    表  1  金刚石砂轮常用造孔剂及性能

    Table  1.   Common pore forming additives and their performance for diamond grinding wheels

    类型造孔剂名称平均粒径 d / μm造孔效果
    溶解型[10]CaO、Zn、SiO25~45受溶剂影响较大
    加热碳化或分解粉煤灰微球[11]105~235类球形气孔,含量较高时易产生裂纹
    砂糖颗粒[12]100~500不规则形气孔,含量较低时分布较均匀
    石墨颗粒[13]250~300大小不一,不规则形气孔
    CaCO3[13]60~180分布均匀,类球形气孔
    核桃壳粉[14]180分布不均匀,不规则形气孔
    精萘[14]120分布均匀,类球形气孔
    空心微球空心玻璃微球[15]40, 80尺寸相近,分布均匀,类球形气孔
    空心氧化铝微球[16]125, 250尺寸相近,分布均匀,类球形气孔
    下载: 导出CSV

    表  2  不同质量分数的空心氧化铝微球砂轮配方

    Table  2.   Formula and the preparation parameters of grinding wheel specimens with different mass fraction of hollow Al2O3 microsphere

    金刚石
    质量分数
    ωd / %
    结合剂
    质量分数
    ωc / %
    空心氧化铝
    微球质量分数
    ωa / %
    烧结
    温度
    θ / ℃
    保温
    时间
    t / h
    成形
    密度
    ρ / (g·cm−3)
    64.9932.013.006701.02.0
    62.9831.026.006701.02.0
    60.9730.039.006701.02.0
    58.9629.0412.006701.02.0
    下载: 导出CSV
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  • 录用日期:  2022-03-25
  • 收稿日期:  2022-01-16
  • 修回日期:  2022-03-24

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