Materials Reports  2021, Vol. 35 Issue (z2): 395-398 |
| METALS AND METAL MATRIX COMPOSITES |
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| Oxidation Behavior of Martensiticheat Resistant Steel for Steam Turbine High Temperature Blades During Operation |
| LI Jinqi1,2, CHENG Yiwen1,2, PEI Yubing1,2, WANG Tianjian1,2, NIE Liping1,2
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1 State Key Laboratory of Laboratory of Long-life High Temperature Materials, Deyang 618000, China
2 Dongfang Electric Corporation Dongfang Turbinr Co.,Ltd., Deyang 618000, China |
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Abstract The oxidation was studied of martensiteheat resistant steel blade surface in a power plant. The results show that the inner oxide is iron chromium spinel and the outer layer is iron oxide on the surface of stage 1—4 blades at the service temperature of 530—580 ℃. The Cr element in iron chromium spinel is unevenly distributed. The steam flow rate leads to the differences in the composition and structure of iron rich oxides in the outer layer of different stages of blades; the outward diffusion of metal ions is the speed limiting step of oxidation rate, and it is also the main reason for the formation of holes in the oxide layer. Because the increase of temperature can promote the outward diffusion of metal ions.
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Published: 09 December 2021
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| Fund:This work was financially supported by the Deyang City and Universities Open Cooperation Technology R & D Plan Project (2018CKJ001). |
About author:: Jinqi Li received his M.S. degrees in June 2019 from Lanzhou University of Technology in engineering. He is currently an assistant engineer in Dongfang Electric Corporation Dongfang Turbinr Co.,Ltd., and in the deve-lopment of material analysis and inspection.
Yubing Pei received her M.S. degrees from Tsinghua University in engineering. She is currently a senior engineer in Dongfang Electric Corporation Dongfang Turbinr Co., Ltd., and in the development of material analysis and inspection. |
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