| 热压烧结工艺参数对超硬磨料砂轮节块性能的影响 |
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| 引用本文： | 余剑武,文丞,黄帅,龙小兵,吴耀.热压烧结工艺参数对超硬磨料砂轮节块性能的影响[J].金刚石与磨料磨具工程,2016,36(6):29-34. |
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| 作者姓名： | 余剑武 文丞 黄帅 龙小兵 吴耀 |
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| 作者单位： | 湖南大学 机械与运载工程学院, 长沙 410082 |
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| 基金项目： | 国家自然科学基金项目（51575174） |
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| 摘 要： | 金属基金刚石砂轮具有把持力大和使用寿命长等特点，其传统制备方法常采用高温烧结成型，但高温烧结会对磨粒产生较大的热损伤，影响砂轮的性能和使用寿命。热压烧结比常压高温烧结的成型温度低，能有效减少金刚石磨粒的热损伤问题。本研究采用热压烧结方式来制备铜基结合剂金刚石砂轮节块，磨粒平均粒度尺寸为27 μm。设计三因素三水平正交试验，探讨热压烧结工艺参数对金刚石砂轮节块密度、硬度和抗弯强度等物理、力学性能影响。结果表明:当烧结温度为650℃、烧结压力为25 MPa、保温时间为150 s时，金刚石砂轮节块的力学性能最好，并且实现了金刚石磨料与结合剂间牢固的冶金结合。
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| 关 键 词： | 金属结合剂 砂轮节块 金刚石磨料 热压烧结 力学性能 |
Effect of hot-press sintering parameters on properties of super-abrasive wheel segments |
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| YU Jianwu,WEN Cheng,HUANG Shuai,LONG Xiaobing,WU Yao.Effect of hot-press sintering parameters on properties of super-abrasive wheel segments[J].Diamond & Abrasives Engineering,2016,36(6):29-34. |
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| Authors: | YU Jianwu WEN Cheng HUANG Shuai LONG Xiaobing WU Yao |
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| Affiliation: | College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China |
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| Abstract: | Metal-bonded diamond wheel has advantages on bonding strength and using life, which is traditionally sintered by high temperature,causing thermal damage to diamond abrasives and affecting the grinding performance and using life of diamond wheels. The temperature in hot-pressing sintering is lower than that in traditional high temperature sintering so that hot-pressing sintering effectively reduces thermal damage to diamond abrasives. Hot-pressing sintering method is used to fabricate metal-bonded diamond wheel segment using diamond grains with average size of 27 μm. Orthogonal tests with 3 factors and 3 levels are conducted,and effects of process parameters on mechanical properties of wheel segment are investigated. The results show that the best mechanical properties is obtained under temperature 650℃,pressure 25 MPa and holding temperature time 150 s; metallurgical adhesion between diamond and metal bond is also realized. |
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