退火对高锰无取向电工钢磁性能的影响

Effect of annealing on magnetic properties of high-manganese non-oriented electrical steel

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。

Effect of annealing at the range of 875-1000 ℃ on microstructure,texture and magnetic properties of high-manganese 50W470non-oriented electrical steel was researched. And the impact of annealing at 975 ℃ × 3 min and 975 ℃ × 5 min was compared and analyzed.The results show that the grain size increases and becomes more uniformity with the increase of annealing temperature. So the iron loss decreases and the magnetic induction,overall,is a down trend,but at 975 ℃ the magnetic induction is slightly elevated. The longer annealing time is beneficial to the iron loss,while it is not beneficial to the magnetic induction. There is strong { 100 } texture which is advantageous to magnetic property in the finished plate annealed at 975 ℃ × 3 min. The { 100} texture is obviously weak in the finished plate annealed at 975 ℃ × 5 min,which reduces the magnetic induction. Therefore,optimal annealing process for the steel is 975 ℃ × 3 min high temperature short-term annealing.