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Cr-Cu-Si金屬硅化物合金組織與耐磨性
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TB383

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國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目（50331010）：國(guó)家高技術(shù)研究發(fā)展計(jì)劃資助課題（2003AA305750,2002AA305203）：國(guó)防基礎(chǔ)科研項(xiàng)目、航空基礎(chǔ)科學(xué)基金（02H51011）資助項(xiàng)目


Microstructure and Wear Resistance of a Cr-Cu-Si Metal Silicide Alloy
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    摘要:

    利用激光熔煉材料制備技術(shù)，制得了由銅基固溶體增韌的Cr5Si3／CrSi金屬硅化物新型耐磨合金，分析了合金的顯微組織結(jié)構(gòu)，測(cè)定了合金的顯微硬度，考察了合金在室溫干滑動(dòng)磨損條件下的耐磨性能。研究結(jié)果表明：Cr-Cu-Si金屬硅化物合金顯微組織由Cr5Si3金屬硅化物初生樹枝晶、CrSi相的初生樹枝晶及枝晶間銅基固溶體組成，由于金屬硅化物Cr5Si3及CrSi的高硬度、強(qiáng)原子間結(jié)合力與銅基固溶體的優(yōu)異導(dǎo)熱性、摩擦相容性，上述激光熔煉Cr-Cu-Si金屬硅化物合金材料在室溫滑動(dòng)干摩擦試驗(yàn)條件下表現(xiàn)出優(yōu)異的耐磨性。

    Abstract:

    A wear resistant Cr-Cu-Si metal silicide alloy having a microstructure consisting of the primary dual-phase dendrite with a Cr5Si3 core encapsulated by CrSi phase and the interdendritic ductile Cu-based solid solution was fabricated by the laser melting process. Microstructure of the Cr-Cu-Si metal silicide alloy was characterized by OM, SEM, XRD and EDS. Microhardness was measured using a MH-6 semi-automatic Vickers micro-hardness tester. Because the wear-resistant metal silicide CrsSi3 and CrSi have high hardness, strong covalent-dominated atomic bonds, and the ductile Cu-based solid solution has excellent thermal conductivity, low coefficient of friction and excellent ductility, the Cr-Cu-Si metal silicide alloy has excellent wear resistance under room temperature dry sliding wear test conditions.

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尹延西 李安 張凌云 王華明. Cr-Cu-Si金屬硅化物合金組織與耐磨性[J].稀有金屬材料與工程,2006,35(3):391~394.[Yin Yanxi, Li An, Zhang Lingyun, Wang Huaming. Microstructure and Wear Resistance of a Cr-Cu-Si Metal Silicide Alloy[J]. Rare Metal Materials and Engineering,2006,35(3):391~394.]
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  • 收稿日期:2004-12-02
  • 最后修改日期:2005-04-05
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