Structure of Surface Oxide Layer and Effect on Nitriding of Grain-oriented Silicon Steel
YAN Guo-chun1, HE Cheng-xu1, MENG Li1, MA Guang2, WU Xi-mao3
1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Department of Electrical Engineering New Materials and Microelectronics, State Grid Smart Grid Research Institute, Beijing 102211, China;
3. Electric Power Research Institute, Liaoning Electric Power Co., Ltd., Shenyang 110006, China
Abstract：The evolution of oxide layer and its influence on nitriding after different decarburization time and holding time in grain-oriented silicon steel was investigated by field emission scanning electron microscopy and energy dispersive spectrometer. The results indicate that oxide layer gets thicker with the decarburization time prolonging and is beneficial to nitriding, accompanying with the process of lamellar silica transform into spherical silica. The three-layer structure of oxide layer is beneficial to nitriding, the main contribution to nitriding comes from lamellar silica, while thicker spherical silica plays certain suppression role in nitriding, the nitriding content of oxide layer with solely spherical silica structure is much less than that of three-layer structure. There are some influences on the morphology of nitride after nitriding process.
严国春, 何承绪, 孟利, 马光, 吴细毛. 取向硅钢表面氧化层的结构及其对渗氮的影响[J]. 材料工程, 2015, 43(12): 89-94.
YAN Guo-chun, HE Cheng-xu, MENG Li, MA Guang, WU Xi-mao. Structure of Surface Oxide Layer and Effect on Nitriding of Grain-oriented Silicon Steel. Journal of Materials Engineering, 2015, 43(12): 89-94.
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