程广萍,韩众亚,高国璨,何宜柱,丁汉林

• 1:安徽工业大学材料科学与工程学院
• 2:马钢和菱实业有限公司

摘要(Abstract)：

以镍包铝、镍基自熔性合金以及铝的混合粉为原料,利用激光工艺与镍、铝之间的反应合成相结合,制备了Ni-Al金属间化合物涂层。实验结果表明,涂层显微组织主要由NiAl和Ni3Al两相构成,其中NiAl相呈树枝晶形貌,Ni3Al相有两种形态,一种沿NiAl树枝晶间呈连续网状分布,另一种在NiAl相上析出,呈细小不规则角状。与直接熔覆镍包铝相比,镍包铝中添加镍基合金与铝后,多道熔覆功率由2.4 kW下降为2.1 kW,涂层质量改善,同时降低了基底中铁元素的熔入;涂层硬度由410~440 HV提高到490~540 HV。

关键词(KeyWords)： 激光熔覆;反应合成;金属间化合物;涂层;Ni-Al

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51204003)

作者(Author): 程广萍,韩众亚,高国璨,何宜柱,丁汉林

DOI: 10.13289/j.issn.1009-6264.2014.11.029

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