陈龙,孟惠民,黄亮亮,刘俊友

• 1:北京科技大学新材料技术研究院

摘要(Abstract)：

采用电火花沉积技术在45钢表面制备了YG8多层沉积涂层,研究了涂层的微观组织及耐磨性能。结果表明,通过优化的多层沉积工艺参数可以获得组织均匀致密且与基体呈冶金结合的沉积层,且比单层沉积层厚度更大、孔隙更少;沉积层主要由Fe3W3C,Co3W3C,W2C和Fe2C等相组成;沉积层中弥散分布有大量的超细碳化物颗粒;沉积层的最高硬度为1785.7 HV,平均硬度为1677.3 HV,其耐磨性能是45钢基体的2.1倍;沉积层的磨损机制主要是疲劳磨损,涂层中弥散分布的超细硬质相是沉积层硬度及耐磨性能提高的主要因素。

关键词(KeyWords)： 电火花沉积;45钢;YG8涂层;组织结构;耐磨性

Abstract:

Keywords:

基金项目(Foundation): 北京市科学研究与研究生培养共建项目(2011150441601)

作者(Author): 陈龙,孟惠民,黄亮亮,刘俊友

DOI: 10.13289/j.issn.1009-6264.2013.11.031

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