Article
Materials Science, Multidisciplinary
Bowen Shi, Tao Li, Dong Wang, Xiaorui Zhang, Hongchao Zhang
Summary: This study investigates crack behavior and prevention of Ni60A coating by coaxial laser cladding. It found that nonuniform hard Cr-rich precipitates and large residual tensile stress are the main reasons for cracking, and thermal stress models were established to effectively reduce crack formation. Preheating the substrate can significantly decrease cracking rate, and a crack-free coating with higher microhardness can be achieved by adjusting process parameters.
JOURNAL OF MATERIALS SCIENCE
(2021)
Review
Optics
Silong Cao, Jun Liang, Lingqian Wang, Jiansong Zhou
Summary: By successfully fabricating the Cr3C2 reinforcing Ni60A-Ag self-lubricating composite coating on Cu alloy through laser cladding technology, the wear resistance was significantly improved. The preparation of NiCr intermediate layer effectively suppressed defect formation, allowing for homogeneous distribution of Cr7C3 and Ag fine dendrites, thereby increasing the hardness and plastic deformation resistance of the composite coating.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Zipeng Su, Jingbin Li, Yameng Shi, Sixue Ren, Zhiyuan Zhang, Xianfei Wang
Summary: Ni60A/Cr3C2 composite coatings were deposited on the surface of 60Si2Mn steel using laser cladding technology to improve the surface performance and service life of the arc-shaped nail teeth. The quality of the coating is influenced by the process parameters such as scanning rate, powder feed rate, and laser power. The optimum combination of laser cladding parameters (T6) is 1800 W laser power, 5 mm/s scanning rate, and 8 g/min powder feed rate.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Optics
Qing-Shuai Liu, Xiu-Bo Liu, Gang Wang, Yi-Fan Liu, Yuan Meng, Shi-Hong Zhang
Summary: In this study, Ni60-Cu composite coatings were fabricated using laser cladding technology, and the effects of Cu addition on microstructure and tribological behaviors were investigated. The results showed that the addition of Cu improved the tribological properties of the coatings, especially at high temperatures.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Qi Ma, Hui Zhang, Yuexia Lv, Chenxiao Song, Ning Guo, Guangchun Xiao, Wei Zhao
Summary: W0.5Ta0.3MoNbVAlTi1-xZrx (x = 0, 0.25, 0.5, 0.75, and 1.0) high entropy alloy coatings were prepared on the surface of 45# steel using a laser cladding method. The study investigated the phase transformation, microhardness, wear mechanism, and high-temperature oxidation resistance of the coatings. The results showed that the proportion of phases in the coatings changed with increasing x, with the highest microhardness observed at x = 0.25. The wear mechanism of the coatings was abrasive wear, and the best wear resistance was observed at x = 0.5. The high-temperature oxidation resistance of the coatings was enhanced at x = 0.75.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Yingying Li, Hao Liu, Xinhua Liu, Peijian Chen, Haifeng Yang, Jingbin Hao, Wenpeng Gao
Summary: CoCrFeNiTix (x=0, 0.25, 0.5, 0.75, 1.0) high-entropy alloy (HEA) coatings were prepared on 45 steel by laser cladding. Ti-doping promotes the precipitation of intergranular hard BCC phase and TiO2 intermetallics from the ductile matrix, resulting in increased microhardness. The heterogeneous microstructure and oxide layer induced by friction provide excellent dry sliding wear resistance in a wide temperature range. However, the protective oxide layer is susceptible to delamination at higher temperatures, leading to increased wear rates.
Article
Optics
Bowen Shi, Tao Li, Zhiwei Guo, Xiaorui Zhang, Hongchao Zhang
Summary: In this study, a crack-free Ni60A coating was successfully obtained by selecting suitable process parameters. It was found that a high line energy and low powder feed rate can prevent cracking, but result in low microhardness. Further research showed that a combination of preheating and adding an insulating plate can improve the microhardness of the crack-free coating.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Zheng-Xing Zhu, Xiu-Bo Liu, Yi-Fan Liu, Shi-Yi Zhang, Yuan Meng, Hai-Bin Zhou, Shi-Hong Zhang
Summary: High entropy alloy coatings have great potential for improving the wear resistance of stainless-steel substrates. In this study, FeCoCrNiCux and FeCoCrNiSix high entropy alloy coatings were prepared using laser cladding. The microstructures were analyzed and the tribological properties were investigated at room temperature and 600 degrees C. The results showed that the addition of Cu/Si significantly improved the tribological properties at high temperature, with the FeCoCrNiSi coating exhibiting the best performance at 600 degrees C.
Article
Materials Science, Coatings & Films
Yi-Fan Liu, Su-Guo Zhuang, Xiu-Bo Liu, Chun-Sheng Ouyang, Yang Zhu, Yuan Meng
Summary: Composite coatings (Ni60-Ti3SiC2) prepared by laser cladding on 304 stainless steel exhibited significantly improved hardness and excellent tribological properties at high temperatures. The presence of small-sized hard phases for fine-grain and dispersion strengthening, along with the addition of Ti3SiC2 lubricant, contributed to the enhanced wear resistance and friction reduction observed.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Kang Qi, Long Jiang
Summary: In this study, a cobalt-based alloy coating was prepared on the surface of 300 M steel using magnetic field-assisted laser cladding technology, and the effects of different frequencies of an alternating magnetic field on the properties of the coating were investigated. The results showed that the electromagnetic field optimized the microstructure of the coating, with the most significant refinement observed at a magnetic field frequency of 65 Hz. Additionally, the magnetic field reduced the thermal stress of the coating and enhanced its wear and corrosion resistance.
Article
Materials Science, Coatings & Films
Yucheng Yang, Yaojia Ren, Yanwen Tian, Kaiyang Li, Lichun Bai, Qianli Huang, Quan Shan, Yingtao Tian, Hong Wu
Summary: This study systematically investigated the microstructural evolution and tribological behavior of FeCoCrNiMoSix HEA coatings prepared by laser cladding on Q235 steel substrates. The results showed that increasing Si content can improve the hardness and wear resistance of the coatings.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Qian Xiao, Bo Zhang, Wenbin Yang
Summary: This article focuses on using laser-cladding technology to repair subway wheels and improve their tribological properties. Nickel-based and iron-based alloy coatings were prepared and their microstructure, mechanical properties, and performance were studied. The results provide theoretical and technical guidance for the application of laser-cladding technology on subway wheels.
Article
Automation & Control Systems
Haiyang Long, Tiankai Li, Zhen Dong, Yongliang Gui, Changming Qiu, Mingming Wang, Dongdong Li
Summary: The cladding process is crucial in determining the quality and efficiency of cladding, and studying its characteristics is important for industrial applications. By studying process parameters and the morphology of the cladding layer, optimal parameters and the formation mechanism of the layer's morphology were determined. Microstructure and hardness testing revealed that the optimized coating had improved hardness.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Zhongtang Gao, Shuqing Zhang, Congcong Ren, Yuan Yu, Zhiming Gao, Chuanwei Zhang
Summary: Different La2O3 contents were added to the Ni60 alloy cladding layer prepared by laser cladding technology on 35CrMoV surface. The characterization of the coating with different La2O3 additions was conducted using x-ray diffraction (XRD), scanning electron microscopy (SEM), Microscopic Vickers hardness tester, MicroXAM-800 optical surface photometer, and friction testing machine. The results revealed that the addition of La2O3 resulted in lattice distortion in the cladding phase, refined the microstructure of the cladding layer, decreased the friction coefficient and wear trace depth, and greatly improved the wear resistance of the cladding layer. The addition of 1.6% La2O3 effectively refined the grain, inhibited the formation of cracks and pores, and improved the wear performance of the cladding layer.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Tiankai Li, Haiyang Long, Changming Qiu, Mingming Wang, Dongdong Li, Zhen Dong, Yongliang Gui
Summary: This study establishes the statistical relationship between process parameters and quality of Ni60PTA coating using the response surface method and variance analysis. The experimental results show that the laser power has a dominant influence on the dilution ratio, while the scanning speed has the greatest influence on the ratio of layer width to height and contact angle.