胡立威,李晋锋,乐国敏,曲凤盛,戚力,刘学

• 1:中国物理工程研究院材料研究所
• 2:燕山大学材料科学与工程学院

摘要(Abstract)：

选取Zr、Cu、Ni和Al的混合粉末为原料,在纯Ti基板上利用激光熔化沉积技术制备了Zr-Cu-Ni-Al单道熔覆涂层试样。采用X射线衍射分析仪、光学显微镜、扫描电镜、显微硬度仪等研究了激光功率对熔覆层显微组织与性能的影响。研究结果表明:熔覆涂层组织由非晶和金属间化合物组成,基体Ti对熔覆层的稀释作用是涂层发生晶化的主要原因;熔覆涂层中树枝晶尺寸随着激光功率的增加而变大,熔覆试样的硬度也随着树枝晶尺寸的增大而降低,最高可达(631±4) HV0.3,约为基体硬度的5倍,对基体具有显著强化效果。

关键词(KeyWords)： 激光熔覆;微观结构演化;Zr-Cu-Ni-Al单道涂层

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51601176,51401189)

作者(Author): 胡立威,李晋锋,乐国敏,曲凤盛,戚力,刘学

DOI: 10.13289/j.issn.1009-6264.2018-0284

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