超高速激光熔覆Ni-cBN/(NiCoCr)_(94)Al_(3)Ti_(3)涂层的组织及性能  

Microstructure and Properties of Ultra-high-speed Laser Cladding Ni-cBN/(NiCoCr)_(94)Al_(3)Ti_(3) Coating

作　　者：王新生 骆纪锋 李洋[3] 牟泓霖 仝永刚 邢志国 蔡志海 魏世忠 于月洋 WANG Xinsheng;LUO Jifeng;LI Yang;MOU Honglin;TONG Yonggang;XING Zhiguo;CAI Zhihai;WEI Shizhong;YU Yueyang(College of Mechanical and Electrical Engineering,Zhengzhou University of Light Industry,Zhengzhou 430002,China;Henan Provincial Key Laboratory of Intelligent Manufacturing of Mechanical Equipment,Zhengzhou University of Light Industry,Zhengzhou 430002,China;National-Local Joint Engineering Laboratory of Intelligent Manufacturing Oriented Automobile Die&Mould,Tianjin University of Technology and Education,Tianjin 300222,China;National Engineering Research Center for Remanufacturing,Army Academy of Armored Forces,Beijing 100072,China;College of Automotive and Mechanical Engineering,Changsha University of Science and Technology,Changsha 410114,China)

机构地区：[1]郑州轻工业大学机电工程学院,郑州430002 [2]郑州轻工业大学河南省机械装备智能制造重点实验室,郑州430002 [3]天津职业技术师范大学汽车模具智能制造技术国家地方联合工程实验室,天津300222 [4]陆军装甲兵学院机械产品再制造国家工程研究中心,北京100072 [5]长沙理工大学汽车与机械工程学院,长沙410114

出　　处：《中国表面工程》2024年第3期46-56,共11页China Surface Engineering

基　　金：十四五预研项目;国家自然科学基金(52130509);众创空间项目(2021ZCKJ102)。

摘　　要：钛合金性能优越,但表面耐磨性差制约了其应用和发展。为了克服钛合金耐磨性差的缺点,采用超高速激光熔覆技术在TC11基体上制备(NiCoCr)_(94)Al_(3)Ti_(3)涂层并加入Ni包覆cBN颗粒,借助cBN颗粒的高硬度特性制备耐磨涂层。采用X射线衍射仪分析涂层物相,采用扫描电子显微镜(SEM)与能量分散谱仪(EDS)分析涂层组织,借助维式显微硬度计研究涂层截面硬度分布规律,利用摩擦磨损试验机测试涂层的耐磨性能。研究结果表明,Ni包覆cBN颗粒的加入会促进(NiCoCr)_(94)Al_(3)Ti_(3)涂层中Cr元素的偏聚,使富Cr相组织长大。当Ni包覆cBN颗粒的含量在5~15 wt.%时,涂层组织逐渐致密,涂层的硬度随Ni包覆cBN含量的增多而升高,但Ni包覆cBN颗粒含量到达20 wt.%时,涂层致密性降低,涂层的硬度也随之降低。涂层的摩擦因数随Ni包覆cBN含量的增加而升高,耐磨性也随含量的增多而增强。15 wt.%Ni包覆cBN涂层的综合性能最佳,硬度达到1024 HV_(0.5),摩擦因数为0.534,磨损体积0.017 mm3,涂层耐磨性是未添加Ni包覆cBN颗粒涂层的2.8倍。Ni包覆cBN颗粒的加入可以提升涂层的耐磨性,为cBN在耐磨涂层的研究及应用提供参考和借鉴。Titanium alloys have high strength,low density,and excellent corrosion resistance and are important alloy materials in the aerospace field;however,their weak surface wear resistance restricts their application and further improvement in the aviation industry to a certain extent.To improve the wear resistance of titanium alloy surfaces,the application scenarios and service life of titanium alloy parts should be expanded.The wear resistance of the high-entropy alloy coating was improved by particle-strengthening technology.After adding 0,5,10,15,and 20 wt.%Ni-coated with cBN particles to(NiCoCr)_(94)Al_(3)Ti_(3) alloy powder,ultra-high-speed laser cladding technology was used to prepare Ni-coated cBN particle-reinforced(NiCoCr)_(94)Al_(3)Ti_(3) wear-resistant coating on the TC11 matrix.The influence of the Ni-coated cBN particle content on the wear resistance of the coating was investigated using XRD,SEM,EDS,hardness,friction,and wear analyses.Phase analysis of the five coatings showed that the content of the Ni-coated cBN particles was greater than 15 wt.%,and the FCC phase summit of the high-entropy alloy was weakened,indicating that Ni-coated cBN particles can reduce the ductile phase in the coating.Scanning electron microscopy and energy spectrum analysis showed that the content of Ni-coated cBN increased,the Cr in the coating was polarized,the Cr-rich phase structure was a thin strip and constantly aggregated and grew,and the Cr-rich phase belonged to the hard phase,which is consistent with the phase analysis results.The increase in Ni-coated cBN particles leads to an increase in the hard phase inside the coating and a decrease in the toughness phase.The hardness values of five coatings were measured.The hardness curve of the Ni–CBN coating showed that the hardness of the coating top was higher and the hardness of the cross-sectional binding area was lower owing to the uneven distribution of the particles.The accumulation and growth of the Cr-rich hard phase in the coating indicated that the hardness of the

关 键 词：超高速激光熔覆 Ni包覆cBN 硬度 耐磨 (NiCoCr)_(94)Al_(3)Ti_(3)涂层 

分 类 号：TG148[一般工业技术—材料科学与工程]