• 论文
主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
深冷回火处理对掘进机截齿齿尖硬度的影响研究
  • Title

    Effect of cryogenic tempering treatment on hardness of pick tip of roadheader

  • 作者

    王学成闫献国董良

  • Author

    WANG Xuecheng,YAN Xianguo,DONG Liang

  • 单位

    中国煤炭科工集团太原研究院太原科技大学 机械工程学院

  • Organization
    1.Taiyuan Research Institute Co., Ltd.,China Coal Technology Engineering Group, Taiyuan ,China;2.Department of Mechanical Engineering,Taiyuan University of Science and Technology, Taiyuan ,China
  • 摘要

    选取YG8硬质合金作为掘进机截齿齿尖材料,以YG8硬质合金维氏硬度为目的,采用L16(4.5)正交试验设计法对深冷回火工艺参数进行优化,分析不同的深冷温度、深冷速度、深冷时间、回火温度和回火次数对YG8硬质合金维氏硬度的影响,采用极差法得出最优工艺参数组合。研究结果表明,深冷回火处理对YG8硬质合金的显微维氏硬度的影响范围是-15.96~53.02 HV1,最大增幅为4.35%。深冷回火处理工艺参数对YG8硬质合金维氏硬度影响的顺序是深冷速度>回火次数>深冷温度>深冷时间>回火温度,最优工艺参数组合为深冷速度5 ℃/min、深冷温度-196 ℃、深冷时间12 h、回火温度150 ℃、回火次数4次。深冷处理可促使粘结相致密收缩,这对YG8硬质合金硬度的提高有所帮助。

  • Abstract
    YG8 cemented carbide was selected as the pick tipping material of the roadheader.For the purpose of improving the Vickers hardness of YG8 cemented carbide, the parameters of cryogenic tempering were optimized by orthogonal design method, and the effects of different cryogenic temperature, cryogenic speed, cryogenic time, tempering temperature and tempering times on the Vickers hardness of YG8 cemented carbide was obtained by the range method.The results show that the effect of cryogenictempering on the micro Vickers hardness of YG8 cemented carbide is -15.96~53.02 HV1, and the maximum increase is 4.35%.The order of influence of cryogenic tempering process parameters on Vickers hardness of YG8 cemented carbide is tempering times> cryogenic time> cryogenic speed>cryogenic temperature>tempering temperature,and the optimum process parameter combination is cryogenic speed of 3 ℃/min, cryogenic temperature -160 ℃, cryogenic time 12 h, tempering temperature 150 ℃, tempering times of 4.Cryogenic treatment can promote dense shrinkage of the binder phase, which contributes to the improvement of the hardness of YG8 cemented carbide.
  • 关键词

    掘进机截齿YG8硬质合金深冷回火处理正交试验设计维氏硬度

  • KeyWords

    rodheader pick;YG8 cemented carbide;cryogenic & tempering treatment;Orthogonal design;Vickers hardness

  • 基金项目(Foundation)
    国家自然科学基金资助项目(51675363);山西省煤基重点科技攻关资助项目(MJ2014-03)
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主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会

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