激光功率对超声辅助激光熔覆Al2O3-ZrO2陶瓷力学性能的影响

doi:10.13251/j.issn.0254-6051.2020.02.043

金属热处理 ›› 2020, Vol. 45 ›› Issue (2): 218-224.DOI: 10.13251/j.issn.0254-6051.2020.02.043

激光功率对超声辅助激光熔覆Al₂O₃-ZrO₂陶瓷力学性能的影响

李成, 王玉玲, 姜芙林, 张杰, 安相龙

青岛理工大学机械与汽车工程学院, 山东青岛 266520

收稿日期:2019-09-16 出版日期:2020-02-25 发布日期:2020-04-03
通讯作者: 王玉玲(1967—),女,博士,教授,主要研究方向为机械产品绿色设计与制造和激光加工及再制造,E-mail:wyl_ld_lyk@163.com
作者简介:李成(1994—),男,硕士研究生,主要研究方向为绿色设计制造,E-mail:464015550@qq.com。
基金资助:
国家自然科学基金(51775289);山东省自然科学基金(ZR2018PEE011,ZR2019MEE059,2019GNC106102);山东省研究生教育质量提升计划(SDYAL17044);青岛西海岸新区自主创新重大专项(2016-2,2018-1-5,2018-21)

Effect of laser power on mechanical properties of ultrasonic assisted laser clad Al₂O₃-ZrO₂ ceramic

Li Cheng, Wang Yuling, Jiang Fulin, Zhang Jie, An Xianglong

School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao Shandong 266520, China

Received:2019-09-16 Online:2020-02-25 Published:2020-04-03

摘要/Abstract

摘要：

采用激光熔覆工艺在Ti-6Al-4V合金基体上制备Al₂O₃-ZrO₂陶瓷层,探讨在超声辅助下不同激光功率对熔覆层形貌及性能的影响。通过金相显微镜,X射线衍射,扫描电镜,显微硬度测试仪及摩擦磨损试验机研究了熔覆层的宏观形貌,截面形貌,物相组成,微观结构,显微硬度和磨损行为。结果表明:随着激光功率的增加,熔覆层稀释率先增加后降低,激光功率从1100 W增加到1500 W时,稀释率分别为65.86%、68.55%、76.04%、71.57%和68.23%;熔覆层主要由TiAl、TiO和ZrO₂组成;随着激光功率的增加,熔覆层显微硬度呈现先增加后减小的趋势;与其他3种熔覆层(激光功率为1300、1400和1500 W)相比,激光功率为1200 W的熔覆层平均摩擦因数相对较低,约为0.27,该熔覆层的磨损机理为磨粒磨损,其他3种熔覆层的磨损机理为磨粒磨损和粘着磨损。

关键词: 激光功率, 超声振动, Al₂O₃-ZrO₂陶瓷, 熔覆层

Abstract:

Al₂O₃-ZrO₂ ceramic coating was prepared on the Ti-6Al-4V substrate by laser cladding process. The effect of different ultrasonic assisted cladding laser power on the morphology and properties was investigated. The macroscopic morphology, section morphology, phase composition, microstructure, micro-hardness and wear behavior of the laser clad Al₂O₃-ZrO₂ coating were investigated by means of metallographic microscopy, X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy and micro-hardness test, respectively. The results show that the dilution rates of the coatings increase first and then decrease with the increase of laser power. The dilution rates are 65.86%, 68.55%, 76.04%, 71.57% and 68.23% with the laser power increasing from 1100 W to 1500 W, respectively. The clad layer is mainly composed of TiAl, TiO and ZrO₂ and the average microhardness of the clad layers increases first and then decreases with the increase of laser power. The average friction coefficient of the clad layers with a laser power of 1200 W is comparatively lower, about 0.27, compared with three other clad layers with a laser power of 1300, 1400 and 1500 W, its wear mechanism is abrasive wear, and the wear mechanism of the other three clad layers is abrasive wear and adhesive wear.

Key words: laser power, ultrasonic vibration, Al₂O₃-ZrO₂ ceramic, clad layer

中图分类号:

TB332

李成, 王玉玲, 姜芙林, 张杰, 安相龙. 激光功率对超声辅助激光熔覆Al₂O₃-ZrO₂陶瓷力学性能的影响[J]. 金属热处理, 2020, 45(2): 218-224.

Li Cheng, Wang Yuling, Jiang Fulin, Zhang Jie, An Xianglong. Effect of laser power on mechanical properties of ultrasonic assisted laser clad Al₂O₃-ZrO₂ ceramic[J]. HTM, 2020, 45(2): 218-224.

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激光功率对超声辅助激光熔覆Al₂O₃-ZrO₂陶瓷力学性能的影响

Effect of laser power on mechanical properties of ultrasonic assisted laser clad Al₂O₃-ZrO₂ ceramic

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