梁昊,张智慧,周小猛,陆超,孙建宇,毛向阳

• 1:南京工程学院材料工程学院
• 2:江苏省先进结构材料与应用技术重点实验室
• 3:江苏共昌轧辊股份有限公司

摘要(Abstract)：

采用超声冲击设备对高合金钢进行冲击加工,并对冲击后的试样进行400℃退火2 h处理。通过扫描电镜(SEM)、显微硬度仪和高温摩擦磨损仪研究了超声冲击处理后试样的显微组织、硬度分布和高温环境下的摩擦磨损性能;采用光学显微镜和SEM观察试样磨损表面和磨痕的微观形貌,使用能谱仪(EDS)分析磨损表面的元素组成,以研究其磨损机理。结果表明,经超声冲击处理的高合金钢,在温度低于500℃时摩擦系数为0.3～0.4,磨损率为0.04%～0.05%,起伏较小。与原始试样相比,超声冲击处理使其表面形成一层梯度细化组织,表面硬度提高了15.8%,在同等高温条件下的摩擦系数降低了45.8%,磨损率降低了35.8%,表明其高温耐磨损性能经超声冲击处理后得到显著提升。

关键词(KeyWords)： 高合金钢;梯度细化组织;超声冲击;高温耐磨损性能

Abstract:

Keywords:

基金项目(Foundation): 江苏省优秀青年基金资助项目(BK20170090);; 江苏高校青蓝工程、六大人才高峰资助项目(XCL-033);; 南京工程学院大学生科技创新基金项目(TZ20170005)

作者(Author): 梁昊,张智慧,周小猛,陆超,孙建宇,毛向阳

DOI: 10.13289/j.issn.1009-6264.2018-0421

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