[1]王芝秀,朱凡,李海.热浸镀Al-10Si-1Ce的HP40Nb钢微观组织及高温氧化行为研究[J].常州大学学报(自然科学版),2017,(01):1-6.[doi:doi:10.3969/j.issn.2095-0411.2017.01.001]
　WANG Zhixiu,ZHU Fan,LI Hai.Microstructure and Oxidation Resistance Behavior of Hot Dip Al-10Si-1Ce Aluminized Coating on HP40Nb Steel[J].Journal of Changzhou University(Natural Science Edition),2017,(01):1-6.[doi:doi:10.3969/j.issn.2095-0411.2017.01.001]
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热浸镀Al-10Si-1Ce的HP40Nb钢微观组织及高温氧化行为研究()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2017年01期
页码:
1-6
栏目:
材料科学与工程
出版日期:
2017-01-28

文章信息/Info

Title:
Microstructure and Oxidation Resistance Behavior of Hot Dip Al-10Si-1Ce Aluminized Coating on HP40Nb Steel
作者:
王芝秀; 朱凡; 李海
江苏省材料表面科学与技术重点实验室,江苏 常州 213164; 常州大学 材料科学与工程学院,江苏 常州 213164
Author(s):
WANG Zhixiu; ZHU Fan; LI Hai
Jiangsu Key Laboratory of Materials Surface Technology,Changzhou University,Changzhou 213164,China; School of Materials Science and Engineering,Changzhou University,Changzhou 213164,China
关键词:
HP40Nb钢;  热浸镀;  高温氧化;  微观组织
Keywords:
HP40Nb steel;  hot dipping;  high temperature oxidation;  microstructures
分类号:
TQ 31
DOI:
doi:10.3969/j.issn.2095-0411.2017.01.001
文献标志码:
A
摘要:
采用SEM、EDS和XRD等方法,研究了HP40Nb钢热浸镀Al-10Si-1Ce合金的初始镀层、扩散处理渗层、高温氧化渗层的微观组织特征和抗高温氧化性能。结果表明:热浸镀层由初生α-Al,(α-Al+Si)共晶组织的外层和(Fe,Cr,Ni)2(Al,Si)5相的内层组成。热浸镀试样分别在800、900、1 000 ℃下进行4 h扩散处理后,渗层中各层呈现不同的显微组织特征,且表面生成了不同氧化物:θ-Al2O3,θ-Al2O3+α-Al2O3,α-Al2O3。不同温度扩散处理的试样经1 000 ℃/360 h高温氧化后,渗层均由外层(NiAl+Cr3Si)和内层(σ、α+Ni3Al)组成。1 000 ℃/4 h扩散处理的试样在高温氧化过程中平均氧化速率最小、抗氧化性能最好,其原因是表面致密的单一α-Al2O3阻碍了氧化的进行。
Abstract:
In order to improve the high temperature oxidation and carburization resistance of HP40Nb steel, experiment of steel was coated by hot-dipping into a molten bath containing Al-10Si-Ce. The effect of diffuse treatment on hot-dip aluminizing steel microstructure and oxidation resistance behavior at high temperature was studied by means of SEM,EDS and XRD.The results show that after hot-dip Al-10Si-1Ce treatment,the coating layer consisted of inner layer[(Fe,Cr,Ni)2(Al,Si)5]and outer layer[primary α-Al,(α+Si)eutectic structure]. After diffusion at 800, 900, 1 000 ℃ for 4h,the coatings had different microstructure characteristics,different oxides were formed on the surface: θ-Al2O3,θ-Al2O3+α-Al2O3,α-Al2O3. After the cyclic oxidation test at 1 000 ℃ for 360 h,the coatings consisted of outer layer(NiAl+Cr3Si)and inner layer(σ,α+Ni3Al). In the oxidation,the hot dipped Al-10Si-1Ce HP40Nb steel with the diffuse treatment of 1 000 ℃ / 4 h had the minimum oxidation rate and best oxidation resistance. The reason was that the compact α-Al2O3layer of the coating surface hindered the continuous oxidation.

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备注/Memo

备注/Memo:
收稿日期:2016-04-12。
基金项目:国家自然科学基金项目(51671038)。
作者简介:王芝秀(1976—),女,四川江安人,博士,副教授,主要从事金属材料研究。
更新日期/Last Update: 2017-02-10