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激光熔覆TiC增強(qiáng)FeAl金屬間化合物基復(fù)合材料涂層磨損性研究
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TB33 TG115.56

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國(guó)家自然科學(xué)基金(59971003)


Wear Resistance of Laser Clad TiC Reinforced FeAl Intermetallic Matrix Composite Coatings
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    摘要:

    利用激光熔覆技術(shù)在1Cr18Ni9Ti奧氏體不銹鋼表面制得了以TiC為增強(qiáng)相、以FeAl 金屬間化合物為基體的耐磨復(fù)合材料涂層,研究了激光熔覆。FiC/FeAl復(fù)合材料涂層在干滑動(dòng)磨損條件下的耐磨性能及磨損機(jī)制。結(jié)果表明:隨著載荷和滑動(dòng)速率的增加,TiC/FeAl金屬間化合物基復(fù)合材料涂層的磨損速率增加,其磨損機(jī)制隨著載荷的增加逐漸由磨料磨損向粘著磨損轉(zhuǎn)變;激光熔覆層中TiC體積分?jǐn)?shù)的增加,一方面提高了涂層的磨料磨損抗力,另一方面降低了熔覆層表面與對(duì)磨材料之間的粘著傾向,提高了TiC/FeAl涂層的滑動(dòng)磨損性能。激光熔覆TiC/FeAl金屬間化合物基復(fù)合材料涂層具有優(yōu)異的耐磨性能并隨TiC體積分?jǐn)?shù)的增加而提高。

    Abstract:

    TiC reinforced FeAl intermetallic matrix composite coatings were fabricated on the substrate of 1Crl8Ni9Ti by laser cladding, the dry sliding wear resistance of the composite coating was evaluated under dry sliding wear conditions as functions of applied load and sliding speed. The wear mechanisms were discussed based on the worn surfaces and wear debris examinations. Results showed that the laser clad TiC/FeAl intermetallic matrix composite coatings have outerstanding wear resistance under the dry sliding wear test conditions. The wear rate of TiC/FeAl composite coatings increases with increasing applied load and sliding speed. SEM observation of worn surfaces and wear debris indicated that there is a transition of wear mechanism from abrasive wear to adhesive wear with increasing applied load. Furthermore, with the increase of volume fraction of TiC carbide in laser clad coating, the resistance to abrasive wear is improved, and the adhesion between test specimen and counter-face material is reduced, leading to an excellent abrasive and adhesive wear resistance.

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陳瑤 王華明.激光熔覆TiC增強(qiáng)FeAl金屬間化合物基復(fù)合材料涂層磨損性研究[J].稀有金屬材料與工程,2003,(10):840~843.[Chen Yao, Wang Huaming. Wear Resistance of Laser Clad TiC Reinforced FeAl Intermetallic Matrix Composite Coatings[J]. Rare Metal Materials and Engineering,2003,(10):840~843.]
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  • 最后修改日期:2002-04-22
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