鄂猛,胡红祥,国旭明,郑玉贵,白丽莉

• 1:沈阳航空航天大学材料科学与工程学院
• 2: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
• 3:中国石油化工股份有限公司北京燕山分公司

摘要(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。

关键词(KeyWords)： TIG堆焊;激光熔覆;钴基涂层;镍基涂层;空蚀

Abstract:

Keywords:

基金项目(Foundation): 中国科学院核用材料与安全评价重点实验室开放课题(2017NMSAKF03);; 国家自然科学基金(51501206)

作者(Author): 鄂猛,胡红祥,国旭明,郑玉贵,白丽莉

DOI: 10.13289/j.issn.1009-6264.2017-0357

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