于静,宋博,于洪飞,朱新河

• 1:大连海事大学轮机工程学院

摘要(Abstract)：

采用添加银钎焊熔剂和增加保温阶段的工艺方法,在HT300表面成功制备了感应熔覆铁基涂层,并研究了涂层的微观组织形貌、物相组成、显微硬度变化和耐磨性。结果表明:银钎焊熔剂可以降低铁基合金粉末的熔点;保温阶段可以提高涂层组织的均匀性和致密性;涂层主要由α-(Fe,Cr)、Fe_3C和(Cr,Fe)_7C_3相组成;涂层横截面的显微硬度呈现梯度变化的趋势,涂层的平均显微硬度约为764.8 HV0.1,高于基体硬度,但低于镍基涂层;涂层的摩擦系数较大,但磨损量低于镍基涂层和HT300基体;涂层的磨损机理以磨料磨损和氧化磨损为主,牢固附着在涂层表面的氧化物可以有效降低其磨损量。

关键词(KeyWords)： 超音频感应熔覆;铁基涂层;微观组织;耐磨性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51605066);; 中央高校基本科研业务费项目资助(3132019193)

作者(Author): 于静,宋博,于洪飞,朱新河

DOI: 10.13289/j.issn.1009-6264.2019-0228

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