钴基和镍基涂层的微观组织及空蚀性能
Microstructure and cavitation erosion resistance of cobalt-based and nickel-based coatings
查看参考文献13篇
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文摘
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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Cr_(23)C_6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FeNi_3、BNi_3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。 |
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其他语种文摘
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Co-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 Cr_(23) C_6 carbides which precipitated in the grain boundaries and dendrites,and the Ni-based coating is composed of γ-Ni solid solution and FeNi_3,BNi_3 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 Cobased 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 Nibased 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. |
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来源
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材料热处理学报
,2018,39(1):90-96 【核心库】
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DOI
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10.13289/j.issn.1009-6264.2017-0357
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关键词
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TIG堆焊
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激光熔覆
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钴基涂层
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镍基涂层
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空蚀
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地址
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1.
沈阳航空航天大学材料科学与工程学院, 辽宁, 沈阳, 110136
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中国科学院金属研究所, 中国科学院核电材料与安全评价重点实验室, 辽宁, 沈阳, 110016
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中国石油化工股份有限公司北京燕山分公司, 北京, 102500
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1009-6264 |
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学科
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金属学与金属工艺 |
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基金
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中国科学院核用材料与安全评价重点实验室开放课题
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国家自然科学基金
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文献收藏号
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CSCD:6158999
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