赵志平,李有堂,李新勇

• 1:兰州工业学院基础学科部
• 2:兰州理工大学机电工程学院

摘要(Abstract)：

采用粉末火焰喷焊技术制备了以40Cr为基体,Ni60A镍基自熔性合金粉末为涂层材料的试样,利用疲劳试验机及摩擦磨损试验机研究了经不同重熔时间处理后试样的弯扭疲劳寿命及耐磨损性能,并采用扫描电子显微镜(SEM)、能谱分析(EDS)、显微硬度计及非接触三维表面轮廓仪对涂层的磨损形貌、组织成分、表面硬度进行了分析。结果表明:合理的重熔时间长度为10 min。当重熔时间合理时,热喷焊件弯扭疲劳性能最强、涂层表面硬度最高、耐磨损能力最强。当重熔时间长度不合理时,涂层中Cr元素的偏析、SiO2颗粒物的生成等因素均显著影响了涂层的微观组织结构,降低了涂层件的疲劳寿命及耐磨损能力。

关键词(KeyWords)： 火焰热喷焊;弯扭疲劳;涂层硬度;摩擦磨损;组织成分

Abstract:

Keywords:

基金项目(Foundation): 甘肃省教育厅基础研究项目(0612B-04)

作者(Author): 赵志平,李有堂,李新勇

DOI: 10.13289/j.issn.1009-6264.2013.07.016

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