| Effect of Laser Power on Microstructure and Wear Resistance of WCp/Ni Cermet Coating |
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| 作者姓名： | SI Song-hua YUAN Xiao-min LIU Yue-long HE Yi-zhu Keesam Shin |
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| 作者单位： | [1]School of Materials Science and Technology, Anhui University of Technology, Ma＇anshan 243002, Anhui, China [2]School of Nano and Advanced Materials, Changwon National University, Changwon 641-773, Gyeungnam do, Korea |
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| 摘 要： | Laser cladding nickel-based alloy coating （Ni60） and nickel-based composite coating doped with WC particles by 35 % （WCp/Ni） were produced on the low-carbon steel substrate by CO2 continuous wave laser with power of 5 kW using the injected powder technique. The effect of laser power on microstructure and wear resistance of laser cladding WCp/Ni cermet coating was investigated. The WCp/Ni alloy coating with evenly distributed WC ceramic phases and the better bond with the substrate alloy was obtained at a power of 2.2 kW. Diffusion solution reaction happened between WC particles and the substrate alloy during laser cladding, and led to the formation of block rich-tungsten carbide on the edges of the WC particles, especially at higher power. The WCp/Ni alloy coating consists of the undissolved WC particles, the block or dendritic rich-tungsten carbide, the bar-like rich-chromium carbide, and dendrite solid solution and eutectic structure among the carbides. Microhardness and wear resistance of the WCp/Ni coating at different powers were much higher or better than those of Ni60 alloy coating, and the best results were obtained at power of 2.2 kW.
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| 关 键 词： | 陶瓷涂层 WCp/Ni 激光功率 显微结构 磨损抗力 |
| 修稿时间： | 2005-12-27 |
Effect of Laser Power on Microstructure and Wear Resistance of WCP/Ni Cermet Coating |
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| SI Song-hua YUAN Xiao-min LIU Yue-long HE Yi-zhu Keesam Shin.Effect of Laser Power on Microstructure and Wear Resistance of WCp/Ni Cermet Coating[J].Journal of Iron and Steel Research,2006,13(3):74-78. |
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| Authors: | SI Song-hua YUAN Xiao-min LIU Yue-long HE Yi-zhu Keesam Shin |
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| Affiliation: | 1. AC2T research GmbH, Viktor-Kaplan-Straße 2/C, 2700 Wiener Neustadt, Austria;2. Tampere University of Technology, Department of Material Science, Tampere Wear Center, P.O. Box 589, 33101 Tampere, Finland;3. Technische Universität Wien, X-ray Centre, Getreidemarkt 9, 1060 Vienna, Austria;1. Department of Materials Science, Tampere University of Technology, Korkeakoulunkatu 6, 33720 Tampere, Finland;2. Department of Engineering “Enzo Ferrari”, University of Modena and Reggio Emilia, Via Pietro Vivarelli, 10, 41125 Modena, Italy;1. Materials Science and Engineering, KTH Royal Institute of Technology, Brinellv. 23, 100 44 Stockholm, Sweden;2. Sandvik Coromant R&D, Lerkrogsv. 19, 126 79 Stockholm, Sweden;3. Seco Tools AB, Björnbacksv. 2, 737 82 Fagersta, Sweden;4. Å̊ngström Tribomaterials Group, Applied Materials Science, Uppsala University, Lägerhyddsv. 1, 751 21 Uppsala, Sweden;1. CEIT-Basque Research and Technology Alliance (BRTA), Manuel Lardizabal 15, 20018 Donostia-San Sebastián, Spain;2. Universidad de Navarra, TECNUN, Manuel Lardizabal 13, 20018 Donostia-San Sebastián, Spain;3. Chalmers University of Technology, Industrial and Materials Science, SE-412 96 Gothenburg, Sweden;4. Höganäs AB, SE-263 83 Höganäs, Sweden |
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| Abstract: | Laser cladding nickel-based alloy coating (Ni60) and nickel-based composite coating doped with WC particles by 35% (WCP/Ni) were produced on the low-carbon steel substrate by CO2 continuous wave laser with power of 5 kW using the injected powder technique. The effect of laser power on microstructure and wear resistance of laser cladding WCP/Ni cermet coating was investigated. The WCP/Ni alloy coating with evenly distributed WC ceramic phases and the better bond with the substrate alloy was obtained at a power of 2.2 kW. Diffusion solution reaction happened between WC particles and the substrate alloy during laser cladding, and led to the formation of block rich-tungsten carbide on the edges of the WC particles, especially at higher power. The WCP/Ni alloy coating consists of the undissolved WC particles, the block or dendritic rich-tungsten carbide, the bar-like rich-chromium carbide, and dendrite solid solution and eutectic structure among the carbides. Microhardness and wear resistance of the WCP/Ni coating at different powers were much higher or better than those of Ni60 alloy coating, and the best results were obtained at power of 2.2 kW. |
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| Keywords: | laser power cermet coating microstructure wear resistance |
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