Effect of microcrystallization on the oxidation resistance of Fe-Cr alloy
In order to improve the high temperature oxidation resistance of Fe-Cr alloy, cast Fe-Cr alloys with different Cr contents are treated by electrospark deposition to get microcrystalline structure. The oxidation behavior of as-cast and microcrystalline Fe-Cr alloys at 900 ℃ in air is studied. Oxidati...
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doaj-a82f9d4131e94412b7e0d669b8b2c4802020-11-25T01:49:19ZzhoHebei University of Science and TechnologyJournal of Hebei University of Science and Technology1008-15422019-06-0140325926410.7535/hbkd.2019yx03009b201903009Effect of microcrystallization on the oxidation resistance of Fe-Cr alloyJing MA0Xiaojie WANG1Ruiyang WANG2School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, ChinaSchool of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, ChinaSchool of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, ChinaIn order to improve the high temperature oxidation resistance of Fe-Cr alloy, cast Fe-Cr alloys with different Cr contents are treated by electrospark deposition to get microcrystalline structure. The oxidation behavior of as-cast and microcrystalline Fe-Cr alloys at 900 ℃ in air is studied. Oxidation kinetics curves, phase analysis,surface and cross section morphology results show that the diffusion rate of chromium is enhanced by microcrystallized treatment when Cr content is low. Yet the content of Cr is not enough to form continuous oxide film so that the oxidation resistance of Fe-5Cr alloy is decreased. The critical Cr content to form protective oxide scale is reduced by microcrystallized treatment when Cr content increases. The oxidation resistance of microcrystalline Fe-9Cr and Fe-13Cr alloys is obviously improved. The high temperature oxidation resistance of microcrystalline Fe-13Cr alloy is the best, which is due to the formation of continuous dense protective oxide scale on the surface after microcrystallized treatment. Therefore, Microcrystallization treatment is an effective way to improve high temperature oxidation resistance of materials which can be applied in the field of high temperature oxidation.http://xuebao.hebust.edu.cn/hbkjdx/ch/reader/create_pdf.aspx?file_no=b201903009&flag=1&journal_materials failure and protectionmicrocrystallizationFe-Cr alloyhigh temperature oxidation resistanceelectrospark depositionoxidation kinetics |
collection |
DOAJ |
language |
zho |
format |
Article |
sources |
DOAJ |
author |
Jing MA Xiaojie WANG Ruiyang WANG |
spellingShingle |
Jing MA Xiaojie WANG Ruiyang WANG Effect of microcrystallization on the oxidation resistance of Fe-Cr alloy Journal of Hebei University of Science and Technology materials failure and protection microcrystallization Fe-Cr alloy high temperature oxidation resistance electrospark deposition oxidation kinetics |
author_facet |
Jing MA Xiaojie WANG Ruiyang WANG |
author_sort |
Jing MA |
title |
Effect of microcrystallization on the oxidation resistance of Fe-Cr alloy |
title_short |
Effect of microcrystallization on the oxidation resistance of Fe-Cr alloy |
title_full |
Effect of microcrystallization on the oxidation resistance of Fe-Cr alloy |
title_fullStr |
Effect of microcrystallization on the oxidation resistance of Fe-Cr alloy |
title_full_unstemmed |
Effect of microcrystallization on the oxidation resistance of Fe-Cr alloy |
title_sort |
effect of microcrystallization on the oxidation resistance of fe-cr alloy |
publisher |
Hebei University of Science and Technology |
series |
Journal of Hebei University of Science and Technology |
issn |
1008-1542 |
publishDate |
2019-06-01 |
description |
In order to improve the high temperature oxidation resistance of Fe-Cr alloy, cast Fe-Cr alloys with different Cr contents are treated by electrospark deposition to get microcrystalline structure. The oxidation behavior of as-cast and microcrystalline Fe-Cr alloys at 900 ℃ in air is studied. Oxidation kinetics curves, phase analysis,surface and cross section morphology results show that the diffusion rate of chromium is enhanced by microcrystallized treatment when Cr content is low. Yet the content of Cr is not enough to form continuous oxide film so that the oxidation resistance of Fe-5Cr alloy is decreased. The critical Cr content to form protective oxide scale is reduced by microcrystallized treatment when Cr content increases. The oxidation resistance of microcrystalline Fe-9Cr and Fe-13Cr alloys is obviously improved. The high temperature oxidation resistance of microcrystalline Fe-13Cr alloy is the best, which is due to the formation of continuous dense protective oxide scale on the surface after microcrystallized treatment. Therefore, Microcrystallization treatment is an effective way to improve high temperature oxidation resistance of materials which can be applied in the field of high temperature oxidation. |
topic |
materials failure and protection microcrystallization Fe-Cr alloy high temperature oxidation resistance electrospark deposition oxidation kinetics |
url |
http://xuebao.hebust.edu.cn/hbkjdx/ch/reader/create_pdf.aspx?file_no=b201903009&flag=1&journal_ |
work_keys_str_mv |
AT jingma effectofmicrocrystallizationontheoxidationresistanceoffecralloy AT xiaojiewang effectofmicrocrystallizationontheoxidationresistanceoffecralloy AT ruiyangwang effectofmicrocrystallizationontheoxidationresistanceoffecralloy |
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1725007276557729792 |