Effect of Hot-Band Annealing on the Microstructure of Non-Oriented Electrical Steel Containing Copper

Abstract:

The grain sizes and precipitates in hot-rolled bands of the non-oriented electrical steel containing Cu were quantitatively studied while the effect of hot-band annealing on microstructure was evaluated by hot-band annealing at different temperatures. The average sizes of recrystallized grains after coiling at 650°C are in the range of 24~29μm. After hot-band annealing at 850°C for 1h, grains coarsened dramatically. The volume fractions of precipitates in hot-rolled bands after coiling at 650°C for different time are 15~18%. After hot-band annealing, precipitates coarsened and distributed sparsely, and the volume fraction of them decreased to less than 10%.

• Periodical: Advanced Materials Research (Volume 502)
• Pages: 238-242
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.502.238
• Online since: April 2012
• Authors: Di Nan, Yan Ping Zeng, Hui Jie Cui, Zi Yu Zhou
• Keywords: Grain Size, Hot-Band Annealing, Non-Oriented Electrical Steel, Precipitate

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