激光功率对激光熔覆NiCr涂层显微组织和摩擦学性能的影响

IF 0.7 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

International Journal of Materials Research Pub Date : 2023-11-09 DOI:10.1515/ijmr-2022-0498

Sun Chengwen, Li Wei, Kong Dejun

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引用次数: 0

摘要

摘要采用不同激光功率的激光熔覆方法在H13钢表面制备了NiCr涂层。利用超景深显微镜和x射线衍射分析了涂层的显微组织和物相，并利用摩擦试验机研究了激光功率对涂层高温摩擦磨损性能的影响。结果表明:在不同激光功率下制备的激光熔覆NiCr涂层主要由Cr 2 Ni 3和FeNi 3相组成，孔隙率随激光功率的增加从1.28%降低到0.48%;NiCr涂层的平均摩擦系数随激光功率的增加而减小，在1400 W激光功率下制备的NiCr涂层的磨损率最低，说明适当的激光功率可以改善NiCr涂层的表面质量和耐磨性。

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Effect of laser power on microstructure and tribological behavior of laser clad NiCr coating

Abstract NiCr coatings were prepared on H13 steel by laser cladding with different laser power. The microstructure and phases of the obtained coatings were analyzed using a super depth of field microscope and X-ray diffraction, respectively, and the effect of laser power on the friction–wear performance at high-temperature was investigated using a friction tester. The results show that the laser clad NiCr coatings fabricated at the different laser powers are composed of Cr 2 Ni 3 and FeNi 3 phases, and the porosity is decreased from 1.28 % to 0.48 % with the increase of laser power. The average coefficients of friction of NiCr coatings are decreased with the increase of laser power, and the wear rate of NiCr coating fabricated at the laser power of 1400 W power is the lowest among the three kinds of coatings, showing that the suitable laser power can improve the surface quality and wear resistance of NiCr coating.

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来源期刊

International Journal of Materials Research 工程技术-冶金工程

CiteScore

1.30

自引率

12.50%

发文量

119

审稿时长

6.4 months

期刊介绍： The International Journal of Materials Research (IJMR) publishes original high quality experimental and theoretical papers and reviews on basic and applied research in the field of materials science and engineering, with focus on synthesis, processing, constitution, and properties of all classes of materials. Particular emphasis is placed on microstructural design, phase relations, computational thermodynamics, and kinetics at the nano to macro scale. Contributions may also focus on progress in advanced characterization techniques. All articles are subject to thorough, independent peer review.