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FeAlMoCrC和FeAlNiMoCrC涂层在700℃氧化行为研究
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广西有色金属及特色材料加工重点实验室

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中图分类号:

TG174.4

基金项目:

国家自然科学基金(51961008,51401057);广西研究生教育创新计划资助项目(YCSW2018054);广西有色金属及特色材料加工重点实验室青年基金项目(GXYSYF1808)


Study on Oxidation behavior of FeAlMoCrC and FeAlNiMoCrC Coatings at 700 ℃
Author:
Affiliation:

Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured Materials

Fund Project:

National Natural Science Foundation of China (51961008,51401057);Innovation Project of Guangxi Graduate Education (YCSW2018054);Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials Youth Founds (GXYSYF1808)

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    摘要:

    采用高速电弧喷涂技术,将2种自主研发的丝材喷射到45钢表面制备出FeAlMoCrC和FeAlNiMoCrC涂层,分析两种涂层的组织结构,研究两种涂层和基体在700℃下的循环氧化行为。结果表明:FeAlMoCrC涂层主要由FeAl、FeCr和Fe2AlV三种金属间化合物和Al2O3、Fe3O4两种氧化物组成;FeAlNiMoCrC涂层主要由AlNi、AlCr2、FeNi3、Fe8Cr四种金属间化合物和Al2O3、Cr2O3和Fe3O4三种氧化物组成。计算涂层的孔隙率,发现涂层内部孔隙率较低,均在10%以内。对所绘制的氧化增重曲线进行拟合分析后发现,FeAlNiMoCrC涂层的氧化速率常数较小,氧化指数大,氧化速率慢,抗氧化性能良好。结合物相和组织分析,可以认为涂层中低的孔隙率和氧化产物中生成连续且致密的Al2O3、Cr2O3、Fe3O4等氧化膜,是抗高温氧化性能提高的主要原因。

    Abstract:

    FeAlMoCrC and FeAlNiMoCrC coatings were prepared by spraying two kinds of self-developed wire onto the surface of 45 steel with high velocity arc spraying technology. The microstructure of the two coatings was analyzed and the cyclic oxidation behavior of the two coatings and substrate at 700 ℃ was investigated. The results show that the FeAlMoCrC coating mainly consists of three intermetallic compounds: FeAl, FeCr, and Fe2AlV, and two oxide phases of Al2O3 and Fe3O4. The FeAlNiMoCrC coating is mainly composed of four intermetallic compounds: AlNi, AlCr2, FeNi3 and Fe8Cr, and three oxide phases of Al2O3, Cr2O3 and Fe3O4. According to the calculation of the porosity of the coating, it is found that the internal porosity of the coating is low, all of which are less than 10%. After fitting and analyzing the oxidation weight gain curve, it is found that the FeAlNiMoCrC coating has lower oxidation rate constant, larger oxidation index, slower oxidation rate and better oxidation resistance. Through phase and microstructure analyzing, it is considered that the low porosity of the coating and the formation of continuous and dense oxide films such as Al2O3, Cr2O3 and Fe3O4 in the oxidation products contribute to the improvement of high temperature oxidation resistance.

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江旭东,周治文,许征兵,陈孝阳,韦德满,曾建民. FeAlMoCrC和FeAlNiMoCrC涂层在700℃氧化行为研究[J].稀有金属材料与工程,2020,49(9):3225~3234.[Jiang Xudong, Zhou Zhiwen, Xu Zhengbing, Chen Xiaoyang, Wei Deman, Zeng Jianmin. Study on Oxidation behavior of FeAlMoCrC and FeAlNiMoCrC Coatings at 700 ℃[J]. Rare Metal Materials and Engineering,2020,49(9):3225~3234.]
DOI:10.12442/j. issn.1002-185X.20190742

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  • 收稿日期:2019-09-11
  • 最后修改日期:2019-10-08
  • 录用日期:2019-10-11
  • 在线发布日期: 2020-10-15
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