| 引用本文: | 陈 枭,纪岗昌,王洪涛,王玉伟,白小波.氧气流量对超音速火焰喷涂TiB2-40Co涂层组织和性能研究[J].材料科学与工艺,2013,21(6):136-143.DOI:10.11951/j.issn.1005-0299.20130623. |
| CHEN Xiao,JI Gang-chang,WANG Hong-tao,WANG Yu-wei,BAI Xiao-bo.Influence of oxygen content on microstrcture and performance of high velocity oxygen fuel sprayed TiB2-40Co coatings[J].Materials Science and Technology,2013,21(6):136-143.DOI:10.11951/j.issn.1005-0299.20130623. |
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| 摘要: |
| 采用超音速火焰喷涂技术在不同氧气流量条件下制备3种TiB2-40Co涂层,采用扫描电镜、X射线衍射仪研究了涂层的组织和相结构,运用压痕法测定了涂层的显微硬度,通过水淬法测试涂层的抗热震性能,并研究涂层的耐熔融铝硅腐蚀性能．结果表明,3种TiB2-40Co涂层具有叠层状结构,No.1涂层最为致密,其孔隙率仅为0.286％;涂层的主要物相为TiB2和Co;显微硬度值分别为697±60HV0.3、523±86HV0.3和648±38HV0.3;No.1涂层具有最好的抗热震性能;经过120h熔融铝硅腐蚀后发现,3种涂层均具有良好的抗熔融铝硅腐蚀性能,其中No.1涂层试样耐腐蚀性能最好． |
| 关键词: 超音速火焰喷涂 TiB2-40Co涂层 显微组织 腐蚀 |
| DOI：10.11951/j.issn.1005-0299.20130623 |
| 分类号: |
| 基金项目:国家自然科学基金项目(50961007,51001056)；江西省自然科学基金项目(20114BAB206019)；江西省教育厅科技项目(GJJ12622)；江西省十二五重点学科“材料加工工程”资助. |
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| Influence of oxygen content on microstrcture and performance of high velocity oxygen fuel sprayed TiB2-40Co coatings |
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CHEN Xiao, JI Gang-chang, WANG Hong-tao, WANG Yu-wei, BAI Xiao-bo
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(JiuJiang Key Laboratory for Green Remanufacture,School of Mechanic and Materials, JiuJiang University, Jiujiang, Jiangxi 332005, China)
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| Abstract: |
| Three kinds of TiB2-40Co coatings were fabricated by high velocity oxygen fuel(HVOF) method under different oxygen flow rate.The microstructure and phase structure were analyzed by scanning electron microscope (SEM) and X-ray diffraction (XRD). The microhardness was measured by indentation method and the properties of thermal shock resistance and corrosion resistance to molten Al-12.07％Si alloy were investigated. The results show that three kinds of coatings have layer structure, the No.1coating has much denser microstructure and the lowest porosity(0.286％), the main phase constitution of the coatings are TiB2and Co. The microhardness of the studied coatings is respectively 697±60HV0.3、523±86HV0.3and 648±38HV0.3. The No.1coating has excellent thermal shock resistance performance. And the coatings have good durability in the molten Al-12.07％Si alloy after 120h immersion test, especially No.1coating has better corrosion resistance performance. |
| Key words: HVOF TiB2-40Co coating microstructure corrosion |
