| 激光熔覆WCp/Ni-Cr-B-Si-C自熔合金复合涂层的显微结构及干滑动磨损 |
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| 引用本文： | 李强,陈彦斌,雷廷权,杨德庄,周玉. 激光熔覆WCp/Ni-Cr-B-Si-C自熔合金复合涂层的显微结构及干滑动磨损[J]. 中国激光, 1999, 26(2): 186-192 |
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| 作者姓名： | 李强 陈彦斌 雷廷权 杨德庄 周玉 |
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| 作者单位： | 1. 哈尔滨工业大学材料科学与工程学院,哈尔滨,150001;福州大学材料科学与工程学院,福州,750002
2. 哈尔滨工业大学材料科学与工程学院,哈尔滨,150001 |
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| 基金项目： | 金属精密热加工国防科技重点实验室资助项目 |
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| 摘 要： | 运用激光熔覆技术在４５＃钢表面制备了ＷＣｐ增强Ｎｉ－Ｃｒ－Ｂ－Ｓｉ－Ｃ复合涂层。含量为３０ｖｏｌ－％ＷＣ典型涂层的ＸＲＤ，ＳＥＭ和ＴＥＭ分析表明，ＷＣｐ在熔覆的熔化阶段发生部分溶解和分解。激光熔体凝固时形成的微观组织由Ｎｉ＋Ｎｉ３Ｂ共晶基体上分布的杆（或薄片）状α－Ｗ２Ｃ，块状β－Ｗ２Ｃ和四方形η１碳化物Ｍ６Ｃ相组成。这类碳化物主要含Ｗ，并含大量Ｃｒ。销－环式干滑动磨损试验表明，当ＷＣｐ含量约为３０ｖｏｌ－％时，磨损抗力最大
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| 关 键 词： | 激光熔覆，WCp／Ni合金涂层，显微组织，磨损 |
| 收稿时间： | 1997-10-27 |
Microstructure and Dry Sliding Wear of Laser Clad WCp/Ni-Cr-B-Si-C Alloy Composite Coatings |
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| Li Qiang,Chen Yanbin,Lei Tingquan,Yang Dezhuang,Zhou Yu. Microstructure and Dry Sliding Wear of Laser Clad WCp/Ni-Cr-B-Si-C Alloy Composite Coatings[J]. Chinese Journal of Lasers, 1999, 26(2): 186-192 |
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| Authors: | Li Qiang Chen Yanbin Lei Tingquan Yang Dezhuang Zhou Yu |
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| Abstract: | WCp reinforced Ni-Cr-B-Si-C composite coatings were deposited on AISI1045 steel by laser. The microstructure of the typical coating containing 30vol-% WC particulates was investigated using XRD, SEM and TEM. It was found that partial WC dissolved and decomposed in the laser melt pool during the melting stage of the cladding. The rapidly solidified microstructure of the laser melt is composed of metastable bar-like α-W2C, blocky β-W2C and quadrilateral η1 carbide M6C precipitates distributed in Ni/Ni3B lamellar eutectic. Dry sliding wear tests suggested that the composite coating containing about 30vol-% WC particulates has the highest wear resistance. |
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| Keywords: | laser cladding WCp/Ni alloy composite coating microstructure wear |
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