| Influence of Heat Treatment on Microstructure and Sliding Wear Behavior of Fe-Al/WC Composite Coatings |
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| 作者姓名： | 朱子新 杜则裕 徐滨士 马世宁 张伟 |
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| 作者单位： | School of Materials Science and Engineering，Tianjin University，School of Materials Science and Engineering，Tianjin University，State Key Laboratory of Remanufacture Technology，Armored Force Engineering Institute，State Key Laboratory of Remanufacture Technology，Armored Force Engineering Institute，State Key Laboratory of Remanufacture Technology，Armored Force Engineering Institute Tianjin 300072，China，State Key Laboratory of Remanufacture Technology，Armored Force Engineering InstituteBeijing 100072，China，Tianjin 300072，China，Beijing 100072，China，Beijing 100072，China，Beijing 100072，China |
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| 基金项目： | NationalNaturalScienceFoundationofChina(No.50 0 0 50 2 4 ) |
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| 摘 要： | Researchershavebecomeincreasinglyinterestedinironaluminideintermetallics (includingFe3AlandFeAl)since 1970sinviewofthecombinationoflowcost,lowerdensity ,remarkableresistancetoerosion ,sulfidizingandoxidizingathightemperature .However ,industrialap plicationofthesealloyshasbeenverylimitedduetotheirpoorductilityandfracturetoughnessatroomtemperatureaswellastheirdifficultyinshaping1] .Somestudieshaveindicatedthatcoatingstructuralmaterialswithironaluminidesbyusingthermalsprayingwillnotonlysolveth…
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Influence of Heat Treatment on Microstructure and Sliding Wear Behavior of Fe-Al/WC Composite Coatings |
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| ZHU Zi xin,DU Ze yu,XU Bin shi,MA Shi ning,ZHANG Wei.Influence of Heat Treatment on Microstructure and Sliding Wear Behavior of Fe-Al/WC Composite Coatings[J].Transactions of Tianjin University,2003,9(2). |
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| Authors: | ZHU Zi xin DU Ze yu XU Bin shi MA Shi ning ZHANG Wei |
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| Abstract: | An experimental study has been carried out to investigate the influence of heat treatment at 300 ℃,450 ℃ ,550 ℃ ,650 ℃ and 800 ℃ on the microstructure and sliding wear behavior of Fe-AL/WC intermetallic composite coatings produced by high velocity arc spraying (HVAS) and cored wires. The result shows, the main phases in both as-sprayed and heat treated Fe-Al/WC composite coatings are iron aluminide intermetallics ( Fe3 Al + FeAl) and α as well as a little oxide ( Al2O3 ) and carbides ( WC, W2 C, Fe2 W2 C and Fe6 W6 C).After heat treated at 450-650 ℃, dispersion strengthening of Fe2W2C and Fe6W6C will lead to a rise in microhardness of the coatings. The microhardness is likely to be the most important factor which influences the sliding wear behavior of the coatings. Increasing the microhardness through heat treatment will improve the sliding-wear resistance of the Fe-Al/WC composite coatings. |
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| Keywords: | high velocity arc spraying composite coating iron aluminide intermetallics WC heat treatment microstructure sliding wear behavior |
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