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| 煤油流量对HVOF喷涂WC-12Co/NiCrBSi复合涂层显微组织与性能的影响 |
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刘杰1,2,3, 刘侠1,2,4, 胡凯1,2,3, 张世宏1,2,3, 王硕煜4, 丁毅5, 薛召露1,2,4
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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, 马鞍山 243000;2.安徽工业大学 现代表界面 工程研究中心, 马鞍山 243000;3.安徽工业大学 材料科学与工程学院, 马鞍山 243000;4.安徽马钢表面技术股份有限 公司, 马鞍山 243000;5.马钢(集团)控股有限公司, 马鞍山 243000
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| 摘要: |
| 在 CrZrCu 基体上电镀 Ni 粘结层,通过超音速火焰喷涂(HVOF)技术,采用不同煤油流量在电镀 Ni 粘结层上制备了 WC-12Co / NiCrBSi 复合涂层。 利用 XRD、SEM、Raman、维氏显微硬度计、电子拉伸试验机和球盘式摩擦磨损试验机考察了不同煤油流量下涂层相组成、组织结构、力学性能和高温摩擦磨损性能。 结果表明:不同涂层的物相组成基本相同,喷涂过程中发生了一定程度的分解脱碳生成了 W2C,以及少量的 Cr7C3 和 Co3W3C 相;随着煤油流量升高,涂层硬度提高,涂层孔隙率和耐磨性表现出先降低后升高趋势,致密的结构与较高的硬度有利于提高涂层的耐磨性;煤油流量为 26 L/ h 的工艺下制备的涂层孔隙率最低,为 0. 11%,硬度较高达到 927. 0 HV0. 3 ,摩擦因数最低约为 0. 46,磨损率最低为 2. 83×10-15 m3 / (N·m),抗粘着磨损性能最好。 |
| 关键词: 超音速火焰喷涂 WC-12Co / NiCrBSi 复合涂层 煤油流量 显微组织 高温磨损性能 |
| DOI：10.11933/j.issn.1007-9289.20200526001 |
| 分类号:TG174 |
| 文章编号:1007-9289(2020)03-0119-10 |
| 文献标识码:A |
| 基金项目:安徽省对外科技合作项目(201904b11020020) |
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| Effects of Kerosene Flow Rate on Microstructure and Properties of HVOF Sprayed WC-12Co / NiCrBSi Composite Coatings |
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Liu Jie1,2,3, Liu Xia1,2,4, Hu Kai1,2,3, Zhang Shihong1,2,3, Wang Shuoyu4, Ding Yi5, Xue Zhaolu1,2,4
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1.Key Laboratory of Green Fabrication and Surface Technology Advanced Metal Materials, Ministry of Education, Anhui Uni- versity of Technology, Ma’anshan 243000 ,China;2.Research Center of Modern Surface and Interface Engineering, Anhui Uni- versity of Technology, Ma’anshan 243000 ,China;3.School of Material Science and Engineering, Anhui University of Technolo- gy, Ma’ anshan 243000 , China;4.Anhui Ma Steel Surface Technology Co.Ltd., Ma’ anshan 243000 , China;5.Ma Steel (Group) Holding Co.Ltd., Ma’anshan 243000 , China
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| Abstract: |
| Ni bonding layer was prepared by electroplating on CrZrCu and WC-12Co / NiCrBSi composite coatings were pre- pared by high velocity oxy-fuel (HVOF) on Ni bonding layer. XRD, SEM, Raman, Vickers microhardness tester, electronic tensile tester and ball-on-disk tribometer were used to investigate the phase composition, microstructure, mechanical properties and high temperature friction and wear properties of the coatings under different kerosene flow rates. The results show that the phase compositions of different coatings were basically the same. During the spraying process, a certain degree of decomposition and decarburization occured form W2C, as well as a small amount of Cr7C3 and Co3W3C phases. With the increase of kerosene flow rate, the hardness of the coatings increased, and the porosity and wear resistance of the coatings first decreased and then in-creased. Dense structure and high hardness were conducive to improving the wear resistance of the coatings. The coatings pre-pared by the process with kerosene flow rate of 26 L/ h had the lowest porosity of 0. 11%, the higher hardness of 927. 0 HV0. 3 , the lowest friction coefficient of 0. 46, the lowest wear rate of 2. 83×10-15 m3 / (N·m), and the best resistance to adhesive wear. |
| Key words: HVOF WC-12Co / NiCrBSi composite coatings kerosene flow rate microstructure high temperature wear per- formance |
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