金属热处理 ›› 2023, Vol. 48 ›› Issue (6): 52-57.DOI: 10.13251/j.issn.0254-6051.2023.06.009

• 工艺研究 • 上一篇    下一篇

感应熔涂温度对FeCoCrNiMoBSi高熵合金涂层抗高温氧化性能的影响

张孝贤1,2, 解芳1,2, 翟长生3, 刘刚2, 彭银利2, 李本2, 武冰冰2, 蔡广宇2   

  1. 1.郑州大学 机械与动力工程学院, 河南 郑州 450001;
    2.南阳理工学院 河南省增材制造航空材料工程研究中心, 河南 南阳 473004;
    3.岩柏增材智造徐州科技有限公司, 江苏 徐州 221135
  • 收稿日期:2022-12-04 修回日期:2023-04-21 发布日期:2023-08-11
  • 通讯作者: 解芳,教授,博士,E-mail:xiefang811222@163.com
  • 作者简介:张孝贤(1994—),男,硕士研究生,主要研究方向为摩擦学与表面工程技术,E-mail:931967126@qq.com。
  • 基金资助:
    国家自然科学基金(51605230, 52201044, 12274245);河南省重点研发与推广专项(科技攻关)(232102221022);河南省高等学校重点科研项目(21A460021)

Effect of induced cladding temperature on high temperature oxidation resistance of FeCoCrNiMoBSi high entropy alloy coating

Zhang Xiaoxian1,2, Xie Fang1,2, Zhai Changsheng3, Liu Gang2, Peng Yinli2, Li Ben2, Wu Bingbing2, Cai Guangyu2   

  1. 1. School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou Henan 450001, China;
    2. Engineering Research Center of Additive Manufacturing Aeronautical Materials of Henan Province, Nanyang Institute of Technology, Nanyang Henan 473004, China;
    3. Yanbai Additive Zhizao (Xuzhou) Technology Co., Ltd., Xuzhou Jiangsu 221135, China
  • Received:2022-12-04 Revised:2023-04-21 Published:2023-08-11

摘要: 为了解决超超临界锅炉管等高温部件在极限高温工况下的氧化问题, 探索抗高温氧化FeCoCrNiMoBSi高熵合金涂层制备工艺的可行性。利用火焰热喷涂与感应熔涂相结合的方法, 在15CrMo钢基体上采用不同的感应熔涂温度制备了3种FeCoCrNiMoBSi高熵合金涂层, 并对3种涂层和基体分别进行高温氧化试验, 通过金相观察、XRD、SEM和EDS分析对比涂层氧化前后的物相组成、微观结构和元素组成, 分析其高温氧化性能。结果表明, 990、1020和1050 ℃熔涂涂层的氧化动力学曲线均遵循抛物线规律, 在900 ℃氧化120 h后, 上述3种涂层的氧化质量增加分别为0.58、0.50和0.54 mg/cm2, 而基体的氧化质量增加为73.28 mg/cm2, 约为涂层氧化质量增加的146倍。由此可见涂层的抗高温氧化性远优于基体, 其中熔涂温度为1020 ℃的涂层具备最好的抗氧化性。

关键词: 感应熔涂, 高熵合金涂层, 抗高温氧化性, 氧化动力学

Abstract: In order to solve the oxidation problem of ultra-supercritical boiler tubes and other high temperature components under extreme high temperature conditions, the feasibility of the preparation process of high temperature oxidation resistant FeCoCrNiMoBSi high entropy alloy coating was explored. Three kinds of FeCoCrNiMoBSi high entropy alloy coatings were prepared on 15CrMo substrate by flame thermal spraying combined with induction cladding at different temperatures, as well as the high temperature oxidation tests were carried out on the three kinds of coatings and the substrate respectively. The phase composition, microstructure and elemental composition of the coatings before and after oxidation were compared by means of metallographic observation, XRD, SEM and EDS analysis, their high temperature oxidation performance was analyzed. The results show that the oxidation kinetics curves of the coatings claded at 990, 1020 and 1050 ℃ all follow the parabola rule. After oxidation at 900 ℃ for 120 h, the oxidation mass gain of the above three coatings is 0.58, 0.50 and 0.54 mg/cm2 respectively, while the oxidation mass gain of the substrate is 73.28 mg/cm2, which is about 146 times of the oxidation mass gain of the coating. It can be seen that the high temperature oxidation resistance of the coating is much better than that of the substrate, and the coating melted at 1020 ℃ has the best oxidation resistance.

Key words: induction fusion coating, high entropy alloy coating, oxidation resistance at high temperature, oxidation kinetics

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