中国激光, 2012, 39 (10): 1003006, 网络出版: 2012-09-10   

回火处理对激光熔覆颗粒增强镍基复合涂层组织及耐磨性的影响 下载: 581次

Effect of Tempering on Microstructure and Wear Resistance of Laser Cladding Ni-Base Reinforced Particles Composite Coating
作者单位
昆明理工大学材料科学与工程学院, 云南 昆明 650093
摘要
采用优化的激光熔覆工艺在45#钢表面制备了质量良好的颗粒增强多道镍基复合Ni60CuMoW涂层。通过X射线衍射(XRD)、扫描电镜(SEM)和能谱(EDS)等表征手段研究了涂层的显微组织、颗粒相分布和结构特征。根据显微硬度和盘销式干摩擦磨损实验数据,比较了回火处理前后颗粒增强激光熔覆复合涂层的显微硬度分布和耐磨性能,并就热处理对磨损机制的影响进行了分析。结果表明,激光原位制备的颗粒增强镍基复合熔覆涂层经回火处理后,距结合界面0.3~0.8 mm区域范围内析出的复合碳化物和硼化物硬质颗粒具有完整性、尺寸分布均匀、密度大,与基体相界面呈牢固的冶金结合。回火处理前后涂层熔覆区的显微硬度较基体分别提高了4.9倍和5.8倍;耐磨性较基体分别提高了1.1倍和2.9倍。
Abstract
The particles reinforced multi-pass Ni60CuMoW composite coatings are fabricated by optimizing laser cladding process on the surface of 45# steel. The microstructure, particles phase distribution and structure features are characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM) and energy disperse spectroscopy (EDS). The micro hardness distribution and wear resistance of heat treatment composite coatings are measured by microscopic hardness tester and disc-pin dry friction and wear apparatus. The influence of heat treatment on wear mechanism is analyzed. The results show that the precipitation composite carbide and boride after tempering treatment have a good metallurgical bonding with 45# steel substrate in the range of 0.3~0.8 mm from interface. The composite coatings has the characteristics of integrality dimension distribution uniformry and high density. Compared with the 45# steel matrix, the average microhardness of the laser cladding Ni60CuMoW composite coatings before and after heat treatment increases by 4.9 times and 5.8 times, and the wear resistance increases by 1.1 times and 2.9 times, respectively.

王传琦, 刘洪喜, 周荣, 蒋业华, 张晓伟. 回火处理对激光熔覆颗粒增强镍基复合涂层组织及耐磨性的影响[J]. 中国激光, 2012, 39(10): 1003006. Wang Chuanqi, Liu Hongxi, Zhou Rong, Jiang Yehua, Zhang Xiaowei. Effect of Tempering on Microstructure and Wear Resistance of Laser Cladding Ni-Base Reinforced Particles Composite Coating[J]. Chinese Journal of Lasers, 2012, 39(10): 1003006.

本文已被 3 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!