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OALib Journal期刊
ISSN: 2333-9721
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fe--cr--ni--co合金堆焊和重熔层的空蚀性能
Keywords: 材料科学基础学科,空蚀,fe--cr--ni--co合金,tig堆焊,表面重熔
Abstract:
？将fe--cr--ni--co合金堆焊在304不锈钢表面,再对冷却后的堆焊层进行表面重熔,进行不同时间的空蚀实验。采用失重分析、扫描电镜(sem)和x射线衍射仪分析空蚀后的合金层,与304不锈钢和堆焊层对比,研究了表面重熔对耐空蚀性能的影响。结果表明:堆焊层和重熔层的耐空蚀性能远高于304不锈钢,重熔后的合金层其耐蚀性优于堆焊层;在空蚀过程中发生了奥氏体向马氏体的转变,吸收了空蚀能量,延缓了空蚀的进行;堆焊合金的表面重熔使晶粒细化,细化的晶粒对裂纹发展的阻止作用提高了耐空蚀性能。
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