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Ni-Cr／BN自潤(rùn)滑材料摩擦磨損機(jī)理分析
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Analyses of Frictional Wear Mechanics of Ni-Cr/BN Self-Lubricating Composites
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    摘要:

    采用粉末冶金熱壓方法制備了不同BN含量的Ni-20Cr自潤(rùn)滑材料，用掃描電鏡和金相顯微鏡觀察了磨損表面和斷口形貌，研究了不同熱壓溫度、不同BN含量對(duì)材料力學(xué)和摩擦學(xué)性能的影響。研究結(jié)果表明：隨著溫度的升高，Ni—Cr／BN固體自潤(rùn)滑材料的孔隙率減少，力學(xué)和摩擦學(xué)性能增強(qiáng)；Ni-Cr／10％BN摩擦性能比Ni—Cr／11％BN差的原因可能是BN含量的減少使摩擦表面不能形成連續(xù)的潤(rùn)滑膜或者潤(rùn)滑膜在摩擦?xí)r剝落后不能及時(shí)補(bǔ)充，使平均摩擦系數(shù)和磨損量增加。

    Abstract:

    The nickel based self-lubricating materials containing different contents of BN were prepared by not-pressing technology of powder metallurgy. The morphologies of worn surfaces and the fracture were analyzed by scanning electron microscopy and metallurgical microscope. The influences of different hot-pressing temperature and contents of BN on mechanical and tribological properties of the material were studied. The results showed that increasing of hot-pressing temperature leaded to good mechanical properties and tribological properties of material as well as the decreasing of porosity. The Ni-Cr/10%BN had worse tribological properties compared with Ni-Cr/11%BN because decreasing of content of BN cannot form continuous lubricating film on the friction surface or the flaking lubricating film can not be supplied on time.

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馮艷 王日初 余琨. Ni-Cr／BN自潤(rùn)滑材料摩擦磨損機(jī)理分析[J].稀有金屬材料與工程,2007,36(10):1820~1823.[Feng Yan, Wang Richu, Yu Kun. Analyses of Frictional Wear Mechanics of Ni-Cr/BN Self-Lubricating Composites[J]. Rare Metal Materials and Engineering,2007,36(10):1820~1823.]
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  • 最后修改日期:2006-09-20
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