Microstructure and performance of (CoCrNi)88Al6Ti6-cBN composite coatings by high-speed laser cladding (HSLC): A novel strategy for synergizing wear-resistance and friction reduction

被引：2
|
作者：
Yu, Yueyang [1 ]
Li, Yang [1 ,3 ]
Tan, Na [1 ]
Mou, Honglin [2 ]
Xing, Zhiguo [2 ]
Liu, Jun [2 ]
Liu, Jian [2 ]
Du, Xian [2 ]
Li, Jing [2 ]
Cai, Zhihai [2 ]
Cai, Yujun [1 ,3 ]
Wang, Haidou [2 ]
机构：
[1] Tianjin Univ Technol & Educ, Tianjin Key Lab High Performance Precis Forming Te, Tianjin 300222, Peoples R China
[2] Army Acad Armored Forces, Natl Engn Res Ctr Remfg, Beijing 100072, Peoples R China
[3] Tianjin Univ Technol & Educ, Natl Local Joint Engn Lab Intelligent Mfg Oriented, Tianjin 300222, Peoples R China
来源：
TRIBOLOGY INTERNATIONAL | 2024年 / 200卷
基金：
中国国家自然科学基金;
关键词：
High-speed laser cladding; Composite coating; Lubrication; GRAINS; CBN; BEHAVIOR; INTERFACE; MECHANISM; STEEL;
D O I：
10.1016/j.triboint.2024.110175
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
To enhance the wear-resistance of nickel-based blade surfaces, a (CoCrNi)88Al6Ti6-cBN composite coating was produced on GH4169 substrates using HSLC. The microstructure, microhardness and tribology properties of the coating at 25 and 600 degrees C were evaluated. The finding demonstrates that the hardness of the cBN composite coating increase by 91.6 HV0.3 attributed to precipitation strengthening, second phase strengthening and dislocation strengthening. Furthermore, the anti-wear performance of the coating increased by 3.72 times at 25 degrees C and by 3.23 times at 600 degrees C, respectively. Additionally, the friction coefficient exhibited by the coating diminished significantly by converting a portion of the cBN to hBN under the high temperatures generated by laser and oxides generating.
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页数：10
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