Effect of Oxidized Zone Morphology on Forsterite Film Morphology of a Fe-3%Si Steel During High Temperature Annealing

Autor: Fangqin Dai, Xican Zeng, Pan Luwei, Pingsan Xu, Guo Yue
Rok vydání: 2021
Předmět:
Zdroj: Oxidation of Metals. 96:543-556
ISSN: 1573-4889
0030-770X
Popis: The use of silicon-containing steel in the manufacture of transformer cores can save raw materials and greatly reduce the volume and energy consumption of the transformer. A forsterite film of stoichiometry Mg2SiO4 formed on the steel surface provides a certain degree of insulation and forms by reaction between the oxides in internal oxidized zone and a deposited MgO coating during high-temperature annealing. In this work, the morphology evolution of internal oxidized zone and the forsterite film on the steel surface are studied when the arrangement methods for silicon steel and annealing atmosphere are different, then the relationship of morphology between internal oxidized zone and forsterite film is explored. Results showed that the morphology of forsterite film on the steel surface is closely related to the morphology of internal oxidized zone. Metallic iron particles exist in the forsterite film when an iron layer exists in the surface of internal oxidized zone.
Databáze: OpenAIRE
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