Influence of Heating Rate and Decarburization Temperature on the Microstructure and Magnetic Properties of Grain Oriented Electrical Steel

Abstract:

Effects of three heating rates, 5, 20/min., and 300°C/sec and decarburization temperature, 700-850°C in primary annealing on the microstructure and magnetic properties of a grain oriented electrical steel were investigated. It was found that the oxide layer thickness and grain size increased with increasing decarburization temperature. However, they decreased with increasing heating rate. On the other hand, injection nitrogen content into steel sheets decreased with increasing decarburization temperature. The percentage of abnormal grain growth obtained a peak value at 800°C in the specimens treated with heating rate less than 20°C per minute. But specimens with rapid heating rate, percentage of abnormal grain growth increased with increasing decarburization temperature. As percentage of abnormal growth increased, magnetic properties got better.

• Periodical: Materials Science Forum (Volumes 706-709)
• Pages: 2622-2627
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.706-709.2622
• Online since: January 2012
• Authors: Chun Kan Hou, Jian Ming Tzeng
• Keywords: Electrical Steel, Magnetic Property, Primary Annealing, Secondary Recrystallization

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