Evolution of Microstructure, Precipitate and Magnetic Properties with the Different Annealing Temperature in High Grade Nonoriented Electrical Steels

Abstract:

The evolution of microstructure, precipitate and magnetic properties in nonoriented electrical steels with different annealing temperature was studied. The iron loss of steel decreases with an increase in the final annealing temperature ranging from 800~900°C. This phenomenon is associated with grains recovery; recrystallization and grains grow up with the temperature increasing. Grain size continues to increase, but the average particle size decreases and particle density increases at 880~900°C which show precipitates have dissolved. It approved that the dissolution process of a lot of precipitates occurred after grains growing up. Precipitates are mainly of the second phase particles MnS and AlN. The magnetic induction increased firstly at 800~880°C and then increasing at 880~900°C.It can be found that the proportion of the texture for [{100} +Gos/ {111} at 900°C is higher than that at 880°C and the proportion of Gauss texture is higher at 900°C than that at 880°C. Gauss texture in high grade silicon steel plays an important role which promotes magnetic induction to increase.

• Periodical: Applied Mechanics and Materials (Volumes 416-417)
• Pages: 1645-1651
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.416-417.1645
• Online since: September 2013
• Authors: Tie Ye, Cheng Zhou, Zhen Yu Gao
• Keywords: Magnetic Property, Microstructure, Nonoriented Electrical Steels, Precipitate

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