徐峰,王丹,周小平.添加金刚石颗粒的Ni60涂层组织和性能研究[J].表面技术,2016,45(9):100-105.
XU Feng,WANG Dan,ZHOU Xiao-ping.Study on Microstructure and Properties of Ni60 Coating by Adding Di-amond Particles[J].Surface Technology,2016,45(9):100-105 |
| 添加金刚石颗粒的Ni60涂层组织和性能研究 |
| Study on Microstructure and Properties of Ni60 Coating by Adding Di-amond Particles |
| 投稿时间：2016-01-15 修订日期：2016-09-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2016.09.016 |
| 中文关键词: 球磨 火焰喷涂 Ni60涂层 Ni60+20%金刚石涂层 显微硬度 耐磨性 |
| 英文关键词:ball milling flame spraying Ni60 coating Ni60 coating with 20% diamond particles microhardness wear resistance |
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| 中文摘要: |
| 目的 研究金刚石颗粒对Ni60涂层的组织硬度和耐磨性的影响，对比无金刚石颗粒的Ni60涂层与含20%金刚石颗粒的Ni60涂层的组织及性能差异。方法 将预热后的Ni60和Ni60+20%金刚石粉末在Ar气保护下球磨10 h，对球磨后的粉末进行造粒，过筛后，选出粒度低于200目的粉末作为喷涂材料，并在钢基体表面进行火焰喷涂，制备Ni60涂层和含20%金刚石颗粒的Ni60涂层，对获得的涂层进行X射线衍射分析、扫描电镜观察、显微硬度和耐磨性测试。结果 通过火焰喷涂获得了组织致密性较好的Ni60涂层和含20%金刚石颗粒的Ni60涂层。抛光后，Ni60涂层的断面整洁，无粗糙区域，而含20%金刚石颗粒的Ni60涂层断面出现大面积粗糙区域。Ni60涂层的显微硬度约为694.2HV，含20%金刚石颗粒的Ni60涂层的显微硬度约为891.8HV。在载荷6 N、转速为1000 r/min的条件下，Ni60涂层每10 min的磨损量为10.7×10-5 g/mm2，20%金刚石颗粒的Ni60涂层每10 min的磨损量为9.6×10-5 g/mm2。结论 由于金刚石颗粒的硬度非常高，经过砂纸打磨和抛光后，含20%金刚石颗粒的Ni60涂层断面不会像纯金属涂层那样出现光洁、整齐的形貌，而是在涂层局部区域出现较粗糙的形貌。通过对比Ni60涂层和20%金刚石颗粒的Ni60涂层的力学性能，20%金刚石颗粒的Ni60涂层的显微硬度高于Ni60涂层，耐磨性比Ni60涂层好。在低载荷、高滑动摩擦速率的条件下，涂层以微量去除的磨损方式进行。 |
| 英文摘要: |
| Objective To study the effect of diamond particles on the structure hardness and wear resistance of Ni60 coating, and compare the differences of structure and properties between Ni60 coating and Ni60 coating with 20% diamond particles. Methods The preheated Ni60 and Ni60+20% diamond powders were ball milled for 10 h under the protection of Ar gas. The milled powder was granulated and sieved. The particles sized below 200 mesh were selected as spray materials. Ni60 coating and Ni60 coating with 20% diamond particles were prepared on the surface of the steel by flame spraying. X-ray diffraction analysis, scanning electron microscopy, micro-hardness and wear resistance tests were carried out for the prepared coating. Results Ni60 coating and Ni60 coating with 20% diamond particles were obtained with good compactness by flame spraying. After polishing, the section of Ni60 coating was clean and tidy and had no rough area while there was a large area of rough area in the section of Ni60 coating with 20% diamond particles. The microhardness of the Ni60 coating was about 694.2HV, and that of the Ni60 coating with 20% diamond particles was about 891.8HV. Under the load of 6 N and the speed of 1000 r/min, the wear loss of Ni60 coating for every 10 min was 10.7×10-5 g/mm2, and that of Ni60 coating with 20% diamond particles was 9.6×10-5 g/mm2. Conclusion Because of the high hardness of diamond particles, after sanding and polishing, the Ni60 coating with 20% diamond particles has no pure metallic coatings as clean and tidy as simple metal but appears relatively rough in the local region of the coating. Through comparing the mechanical properties of the two coatings, the Ni60 coating with 20% diamond particles has higher microhardness and better wear resistance. Under the condition of low load and high sliding friction speed, the wear mode of the coating is micro removal. |
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