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| 激光熔覆NbC/Ni60合金复合涂层的组织与性能 | |
| 引用本文： | 杜竞楠,董刚,邓琦林,姚建华.激光熔覆NbC/Ni60合金复合涂层的组织与性能[J].应用激光,2012,32(4):277-281. |
| 作者姓名： | 杜竞楠 董刚 邓琦林 姚建华 |
| 作者单位： | 杜竞楠:合肥工业大学机械与汽车工程学院, 安徽 合肥 230009 董刚:浙江省特种装备制造与先进加工技术重点实验室, 浙江 杭州 310014上海交通大学机械与动力工程学院, 上海 200030 邓琦林:上海交通大学机械与动力工程学院, 上海 200030 姚建华:浙江省特种装备制造与先进加工技术重点实验室, 浙江 杭州 310014 |
| 基金项目： | 浙江省公益项目(项目编号: 2011C24006); 浙江省特种装备制造与先进加工技术重点实验室开放基金(项目编号: 2011EM009) |
| 摘 要： | 利用激光熔覆在45钢基体上制备了NbC颗粒增强的Ni60合金复合涂层。结果表明,复合涂层的组织由γ-Ni奥氏体枝晶、枝晶间的共晶、M23C6、NbC、和少量的CrB相等组成。NbC颗粒是在激光熔覆过程中原位合成的,其形貌为不规则的块状或花瓣状。原位合成NbC颗粒增强的Ni60合金激光熔覆涂层的显微硬度可达HV0.2 1 000左右,相比于纯Ni60合金涂层,复合涂层的显微硬度提高了约38%。并且,通过激光熔覆（Nb+C）/Ni60混合粉末成功修复了2Cr13材质汽蚀的汽轮机叶片。 |
| 关 键 词： | 激光熔覆 原位合成 NbC颗粒 显微硬度 磨损 |
| 收稿时间： | 2012/4/12 |
Microstructure and Poperties of NbC/Ni60 Alloy composite Coating by Laser Cladding |
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| Du Jingnan,Dong Gang,Deng Qilin,Yao Jianhua.Microstructure and Poperties of NbC/Ni60 Alloy composite Coating by Laser Cladding[J].Applied Laser,2012,32(4):277-281. | |
| Authors: | Du Jingnan Dong Gang Deng Qilin Yao Jianhua |
| Affiliation: | 1 School of Machinery and Automobile Engineering Hefei University of Technology,Hefei,Anhui 230009,China; 2 Key Laboratory of E&M,Ministry of Education & Zhejiang Province,Engineering research center of process equipment and remanufacturing,Ministry of Education,Zhejiang University of Technology,Hangzhou,Zhejang 310014,China; 3 School of Mechanical and Power Engineering,Shanghai Jiaotong University,Shanghai 200030,China) |
| Abstract: | The NbC particles reinforced Ni60 alloy composite coating was produced by laser cladding on 1045 steel substrate. Theexperiment results show that the microstructure of the composite coating is mainly composed of NbC particles,M23C6, CrB type chromium borides,酌-Ni primary dendrites and interdendritic eutectics. NbC particles were synthesized in situ during laser claddingprocess, and their morphology is irregular-shaped block or petal. Comparing with the pure Ni60 alloy coating, the microhardness ofthe composite coating is increased about 38%, giving a high average hardness of HV0.21 000. The water eroded steam tubine engineblades were repaired by laser cladding (Nb＋C)/Ni60 mixed powders. |
| Keywords: | laser cladding in situ synthesis NbC particles microhardness wear |
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