Abstract
In this study, the effects of decarburization annealing time on the primary recrystallization microstructure, the texture and the magnetic properties of the final product of 0.047% Nb low-temperature grain-oriented silicon steel were investigated by means of OM, EBSD and XRD. The results show that when the decarburization annealing condition is 850 °C for 5 min, the uniform fine primary recrystallization microstructure can be obtained, and the content of favorable texture {111} <112> is the highest while that of unfavorable texture {110} <112> is the lowest, which is mostly distributed near the central layer. At the same time, there are the most high-energy grain boundaries with high mobility in the primary recrystallization microstructure of the sample annealed at 850 °C for 5 min, and the ∑9 boundary has the highest percentage of grain boundaries. The samples with different decarburization annealing time were annealed at high temperature. It was found that perfect secondary recrystallization occurred after high-temperature annealing when the decarburization annealing condition was 850 °C for 5 min. The texture component was characterized by a single Goss texture, and the size of the Goss grain reached 4.6 mm. Under such annealing conditions, the sample obtained shows the optimal soft magnetic properties of B800 = 1.89 T and P1.7/50 = 1.33 w/kg.
Highlights
As a kind of soft magnetic material, grain-oriented silicon steel is widely used in the manufacture of iron cores of various transformers and large generators [1,2,3]
The final microstructure and texture of grain-oriented silicon steel are completely formed by the secondary recrystallization that occurs during high-temperature annealing, and the microstructure and texture of the secondary recrystallization are affected by the texture formed during the decarburization annealing
In order to obtain a certain amount of primary recrystallized grains with Goss orientation, which will become the secondary recrystallized crystal nucleus, the decarburization annealing must be applied to the coldrolled sheet to cause primary recrystallization
Summary
As a kind of soft magnetic material, grain-oriented silicon steel is widely used in the manufacture of iron cores of various transformers and large generators [1,2,3]. The microstructure and texture of primary recrystallization of traditional oriented silicon steel using MnS and AlN as inhibitors have been extensively studied [7,8,9,10]. Research on the decarburization annealing process for Nb-containing low-temperature oriented silicon steel has been rarely reported so far. The primary recrystallization microstructure, texture and grain boundary of Nb-containing low-temperature oriented silicon steel after decarburization annealing at different holding times were studied by OM, EBSD and XRD. Nb-containing low-temperature oriented silicon steel were studied
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
