| 45钢表面激光熔覆Ni35合金涂层的组织及性能 |
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| 引用本文： | 张晓东,董世运,徐滨士,王志坚,闫世兴.45钢表面激光熔覆Ni35合金涂层的组织及性能[J].装甲兵工程学院学报,2009(3):73-76. |
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| 作者姓名： | 张晓东 董世运 徐滨士 王志坚 闫世兴 |
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| 作者单位： | [1]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072 [2]哈尔滨工程大学材料科学与化学工程学院,黑龙江哈尔滨150001 |
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| 基金项目： | 基金项目：国家自然科学基金项目（50735006）;国家“973”计划项目（2007CB607601）;国家科技支撑计划项目（2006BAF02A19） |
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| 摘 要： | 为了修复45钢磨损装备零件,采用激光熔覆工艺在45钢表面制备了Ni35合金涂层。利用扫描电镜（SEM）、能谱分析仪（EDS）、X射线衍射仪、显微硬度计和磨损试验机分析了熔覆层的显微组织,测试了涂层的硬度和耐磨性能。结果表明：熔覆层由γ-Ni和Ni3B两相组成;熔覆层中存在平面晶、胞状晶、枝晶等多种形态;Ni35熔覆层的硬度为450HV,熔覆层的耐磨性是基体的2.86倍。
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| 关 键 词： | 激光熔覆 组织 摩擦磨损 |
Microstructure and Performance of Ni35 Alloy Laser Cladding on 45 Steel Substrate |
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| ZHANG Xiao-dong,DONG Shi-yun,XU Bin-shi,WANG Zhi-jian,YAN Shi-xing.Microstructure and Performance of Ni35 Alloy Laser Cladding on 45 Steel Substrate[J].Journal of Armored Force Engineering Institute,2009(3):73-76. |
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| Authors: | ZHANG Xiao-dong DONG Shi-yun XU Bin-shi WANG Zhi-jian YAN Shi-xing |
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| Institution: | 1 National Defense Key Laboratory for Remanufacturing Technology, Academy of Armored Force Engineering, Beijing 100072, 2. School of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China) |
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| Abstract: | In order to repair 45 steel equipment worn parts, the Ni35 alloy powders are laser - cladded on 45 steel. The microstructure, hardness, wear resistance of cladding layer are analyzed by using scanning electron microscope, X-ray diffractometer, microhardness tester and wear testing machine. The results show that laser-cladding layer is composed mainly of ~/-Ni and Ni3B phases. Microstructure of cladding zone consists of dentrite, cellular and plane crystal, etc. The microhardness of laser-cladded layer is 450 HV. The wear resistance of laser cladded coatings is 2.86 times that of the unclad 45 steel. |
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| Keywords: | laser cladding microstructure friction wear |
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