| 激光熔覆纳米贝氏体涂层的组织与性能 |
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| 引用本文： | 袁 琳,李铸国,黄 坚,李瑞峰. 激光熔覆纳米贝氏体涂层的组织与性能[J]. 中国表面工程, 2011, 24(1): 40-43. DOI: 10.3969/j.issn.1007-9289.2011.01.009 |
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| 作者姓名： | 袁 琳 李铸国 黄 坚 李瑞峰 |
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| 作者单位： | 上海交通大学,材料科学与工程学院,上海市激光制造与材料改性重点实验室,上海,200240 |
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| 基金项目： | 国家自然科学基金项目(50971091); 科技部国际科技合作项目(2009DFB50350); 上海市重大技术装备项目(ZX08089) |
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| 摘 要： | 采用高功率CO2激光熔覆铁基合金粉末,获得了无裂纹、稀释率低、成形良好的熔覆涂层。利用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)对熔覆层的显微组织进行了观察与分析,通过硬度测试与拉伸试验考察了涂层的力学性能。结果显示:熔覆层为纳米贝氏体与残余奥氏体的复合组织,均匀分布的贝氏体铁素体板条厚度为50～80 nm,贝氏体板条间为厚度10～30 nm更为细小的残余奥氏体薄膜;熔覆层平均硬度为610 HV,熔覆涂层的抗拉强度为1 280 MPa,延伸率为6.41%,拉伸断口形貌为韧窝断口。
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| 关 键 词： | 激光熔覆 纳米贝氏体涂层 微观组织 |
Microstructure and Properties of Laser Cladded Nanostructured Bainite Coatings |
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| YEAN Lin,LI Zhu-guo,HUANG Jian,LI Rui-feng. Microstructure and Properties of Laser Cladded Nanostructured Bainite Coatings[J]. China Surface Engineering, 2011, 24(1): 40-43. DOI: 10.3969/j.issn.1007-9289.2011.01.009 |
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| Authors: | YEAN Lin LI Zhu-guo HUANG Jian LI Rui-feng |
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| Affiliation: | YUAN Lin,LI Zhu-guo,HUANG Jian,LI Rui-feng(Shanghai Key Lab of Materials Laser Processing and Modification,School of Materials Science and Engineering,Shanghai Jiaotong University,Shanghai 200240) |
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| Abstract: | A Fe-based coating with cracks-free,low dilution and good forming was deposited by high-power CO2 laser cladding technique.The microstructure of this coating was observed and analyzed by optic microscope(OM),scanning electron microscope(SEM),transmission electron microscope(TEM) and X-ray diffraction(XRD),and its mechanical properties were tested by means of hardness tests and tensile tests.The results show that the microstructure of this coating consists of uniformly distributed nanostructured bainite and ... |
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| Keywords: | laser cladding nanostructured bainite coatings microstructure |
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