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热喷涂技术:2021,13(1):65-72
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铁基 Cr3C2 复合涂层的组织及性能研究
(1.安徽工业大学 先进金属材料绿色制备与表面技术教育部重点实验室;2.安徽工业大学 先进金属材料绿色制备与表面技术教育部重点实验室 安徽工业大学 材料科学与工程学院;3.安徽工业大学 材料科学与工程学院)
Study on Microstructure and Propertiesof Fe-based Cr3C2 Composite Coatings
(1.Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Ministry of Education, Anhui University of Technology;2.Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Ministry of Education, Anhui University of Technology,School of Material Science and Engineering, Anhui University of Technology;3.School of Material Science and Engineering, Anhui University of Technology)
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中文摘要: 利用空气燃料超音速火焰喷涂技术 (HVAF) 在 D2 钢表面制得 Cr3C2-FeCrBSi 复合涂层。 借用光学显微镜 (OM)、 维氏硬度计、 扫描电镜 (SEM)、 拉伸试验机及摩擦磨损试验机对复合涂层的显微结构、 力学性能及摩擦磨 损性能进行表征与测试, 研究了不同比例纳米 - 微米 Cr3C2 陶瓷增强相对复合涂层组织结构及性能的影响。 试验 结果表明: Cr3C2-FeCrBSi 复合涂层主要由 Fe、 Cr3C2、 Cr2O3 及 Cr7C3 相组成。 在优化的粉末比例参数下, Cr3C2- FeCrBSi 复合涂层与基体 D2 钢的结合强度达到了 43MPa, 孔隙率约为 2.4%。 由于陶瓷相的存在, Cr3C2-FeCrBSi 复合涂层的表面硬度平均值为 449HV0.3, 远大于 D2 钢基体的硬度 287HV0.3。 在常温条件下, Cr3C2-FeCrBSi 复合 涂层具有较好的耐磨损性能, 摩擦磨损机制主要是磨粒磨损。
Abstract:Cr3C2-FeCrBSi composite coatings were sprayed on D2 steel by High Velocity Air Fuel Spray (HVAF). The microstructure, mechanical and wear properties of Cr3C2-FeCrBSi composite coatings were tested by optical microscope (OM), Vickers hardness tester, scanning electron microscope (SEM), universal tensile tester and friction and wear tester to study the effect of different nano-micro proportions of Cr3C2 reinforcement elements on composite coatings. The results showed that the Cr3C2-FeCrBSi composite coatings consist of Fe, Cr3C2, Cr2O3 and Cr7C3 phase. Under optimized parameter, the bonding strength between the composite coating and D2 steel can reach 43MPa and the coating porosity is about 5.4%. Because of the existence of Cr3C2 ceramic phase, the surface hardness of the composite coating is very high with an average hardness 449HV0.3, which is much larger than that of D2 steel (287HV0.3). At room temperature, the Cr3C2-FeCrBSi composite coating exhibited good wear resistance. The abrasive wear is the main friction and wear mechanism.
文章编号:     中图分类号:TG174.4    文献标志码:
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引用文本:
杨康,易新林,斯松华,张海鸿.铁基 Cr3C2 复合涂层的组织及性能研究[J].热喷涂技术,2021,13(1):65-72.
Yang Kang,Yi Xinlin,Si Songhua,Zhang Haihong.Study on Microstructure and Propertiesof Fe-based Cr3C2 Composite Coatings[J].Thermal Spray Technology,2021,13(1):65-72.

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