采用真空电子束扫描以Cr3 C2与铁的混合粉为原料在低合金钢表面熔覆制备了(Cr,Fe)7C3/γ-Fe合金层,对合金层进行了金相、X射线衍射和扫描电镜分析以及显微硬度测试和室温干滑动磨损试验.结果表明:合金层的组织均匀细小,由枝状晶奥氏体相扣共晶碳化物相组成;合金层的显微硬度达到950～1 050 HV,约为基材显微硬度(360 HV)的2.6～3.2倍;相对于基材,合金层的耐磨性能提高了5.2倍;合金层只有轻微的摩擦划痕,为磨粒磨损;而基材有片状剥落,属典型的粘着磨损.
参考文献
| [1] | Morimoto J;Sasaki Y;Fukuhara S;Abe N;Tukamoto M .Surface modification of Cr3C2-NiCr cermet coatings by direct diode laser[J].Vacuum: Technology Applications & Ion Physics: The International Journal & Abstracting Service for Vacuum Science & Technology,2006(11/12):1400-1405. |
| [2] | H.V. Zhuk;P.A. Kobryn;S.L. Semiatin .Influence of heating and solidification conditions on the structure and surface quality of electron-beam melted Ti-6Al-4V ingots[J].Journal of Materials Processing Technology,2007(1/3):387-392. |
| [3] | Singh A;Dahotre NB .Laser in-situ synthesis of mixed carbide coating on steel[J].Journal of Materials Science,2004(14):4553-4560. |
| [4] | Yun E;Lee S .Correlation of microstructure with hardness and wear resistance in Cr3C2/stainless steel surface composites fabricated by high-energy electron beam irradiation[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):163-172. |
| [5] | Wank A;Wielage B;Pokhmurska H;Friesen E;Reisel G .Comparison of hardmetal and hard chromium coatings under different tribological conditions[J].Surface & Coatings Technology,2006(5):1975-1980. |
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