Fine precipitates in the grain boundaries of transformer steel

Autor:	M. I. Ivanenkov, M. N. Kul'kova, A. P. Okenko
Rok vydání:	1971
Předmět:	Materials science Annealing (metallurgy) Metallurgy Metals and Alloys Oxide engineering.material Nitride Coercivity Condensed Matter Physics chemistry.chemical_compound Grain growth chemistry Mechanics of Materials engineering Grain boundary Electrical steel Grain boundary strengthening
Zdroj:	Metal Science and Heat Treatment. 13:376-379
ISSN:	1573-8973 0026-0673
DOI:	10.1007/bf00652439
Popis:	1. Electron-microscopic examination showed that aluminum nitrides are formed in transformer steel with 0.02–0.03% residual aluminum, which are first precipitated as fine dendrites in the grain boundaries. The absence of residual aluminum in steel with an elevated oxygen content causes the formation of oxide films in the boundary areas. 2. The presence of nitride inclusions and oxide films in the grain boundaries prevents grain growth during annealing and raises the coercive force. 3. No substantial improvement of the magnetic properties of transformer steel containing oxide films and aluminum nitrides is possible by means of standard heat treatment.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::998d9fbefec2c0fa151cbda3cfd5ee52 https://doi.org/10.1007/bf00652439 Zobrazit plný text záznamu Full text from SpringerLink