Alternative TitleMicrostructure and cavitation erosion resistance of cobalt-based and nickel-based coatings
鄂猛1; 胡红祥2; 国旭明1; 郑玉贵2; 白丽莉3
Source Publication材料热处理学报
Abstract利用TIG堆焊和激光熔覆技术在16Mn钢表面分别制备了钴基和镍基合金涂层,采用XRD、光学显微镜、维氏硬度计、SEM以及质量损失分析法对空蚀后涂层的组织和性能进行对比分析。结果表明:钴基堆焊层由FCC的γ-Co基体和在晶界和枝晶间析出的Cr23C6碳化物组成;镍基熔覆层由FCC的γ-Ni固溶体以及弥散分布在γ-Ni基体中的Fe Ni3、BNi3等物相组成。两种涂层的平均显微硬度值相对于基体都有较大的提高;虽然钴基堆焊层的平均硬度低于镍基熔覆层,但由于钴基涂层具有致密的枝晶状组织,物相间较大的内聚结合强度,空蚀过程中发生相变强化以及相变过程中对冲击损伤能量的耗散的综合作用,其抗空蚀性能更佳。
Other AbstractCo-based and Ni-based alloy coatings were prepared on 16Mn steel surface by TIG surfacing method and laser cladding technology, respectively. Microstructure, composition and cavitation erosion resistance of the coatings after cavitation were characterized by means of optical microscope, scanning electron microscopy, X-ray diffraction, microhardness test and mass loss method. The results show that the Co-based coating mainly consists of γ-Co matrix and Cr23 C6 carbides which precipitated in the grain boundaries and dendrites, and the Ni-based coating is composed of γ-Ni solid solution and FeNi3 , BNi3 and other phases which dispersed in the γ-Ni matrix. The average microhardness of the two coatings is much higher than that of the matrix. Although the average hardness of the Co- based coating is lower than that of the Ni-based coating, but the cavitation resistance of the Co-based coating is better than that of the Ni- based coating, this is due to the Co-based coating has a dense dendritic microstructure, large cohesive strength among phases, phase transformation strengthening effect in the process of cavitation erosion and the dissipation on the impact damage energy in the process of phase transformation.
KeywordTIG堆焊 激光熔覆 钴基涂层 镍基涂层 空蚀
Indexed ByCSCD
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Cited Times:5[CSCD]   [CSCD Record]
Document Type期刊论文
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GB/T 7714
鄂猛,胡红祥,国旭明,等. 钴基和镍基涂层的微观组织及空蚀性能[J]. 材料热处理学报,2018,39.0(1.0):90-96.
APA 鄂猛,胡红祥,国旭明,郑玉贵,&白丽莉.(2018).钴基和镍基涂层的微观组织及空蚀性能.材料热处理学报,39.0(1.0),90-96.
MLA 鄂猛,et al."钴基和镍基涂层的微观组织及空蚀性能".材料热处理学报
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