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研究在875~1000℃退火对高锰50W470无取向电工钢组织、织构以及磁性能的影响,并对975℃×3 min与975℃×5 min退火效果进行对比分析。结果表明,随着退火温度的升高,成品板晶粒尺寸增大且均匀,相应的铁损不断降低,磁感在975℃时略有升高,整体为下降趋势。而过长时间退火,有利于铁损,不利于磁感。在975℃×3 min退火后,成品板中存在较强的有利于磁性能的{100}面织构,而975℃×5 min退火后{100}面织构强度明显减弱,磁感降低。因此,试验用高锰50W470无取向电工钢的最佳退火工艺为975℃×3 min高温短时退火。
The effects of annealing at 875 ~ 1000 ℃ on microstructure, texture and magnetic properties of high manganese 50W470 non-oriented electrical steel were studied. The effects of annealing at 975 ℃ for 3 min and 975 ℃ for 5 min were compared. The results show that as the annealing temperature increases, the grain size of the finished plate increases and becomes uniform, and the corresponding iron loss decreases. The magnetic induction increases slightly at 975 ℃, and decreases as a whole. Annealing for a long time, is conducive to iron loss, is not conducive to magnetic induction. After annealed at 975 ℃ for 3min, there is a strong {100} plane texture in the finished plate which is favorable to the magnetic properties. However, the {100} plane texture strength after annealing at 975 ℃ for 5min obviously decreases and the magnetic induction decreases. Therefore, the optimum annealing process for the high manganese 50W470 non-oriented electrical steel for the test is a short-time high-temperature annealing at 975 ° C × 3 min.