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发明公开
CN107208171A 无取向性电磁钢板的制造方法 无效 - 驳回

无取向性电磁钢板的制造方法
摘要：
一种无取向性电磁钢板的制造方法，其包括：对钢坯进行热轧，在实施热轧板退火后或者不实施热轧板退火而进行1次或夹着中间退火的2次以上的冷轧，并实施最终退火，该钢坯以质量％计含有C：0.005％以下、Si：8.0％以下、Mn：0.03～3.0％、P：0.2％以下、S：0.005％以下、Al：3.0％以下、N：0.005％以下、Ni：3％以下、Cr：5％以下、Ti：0.005％以下、Nb：0.003％以下、As：0.005％以下和O：0.005％以下，在上述无取向性电磁钢板的制造方法中，使上述最终退火的升温过程中的600～700℃的平均升温速度为50℃/秒以上，由此在以改善织构为目的而在最终退火中进行快速加热的情况下，也可稳定地实现高磁通密度。
摘要（英）：

This method for producing non-oriented electrical steel sheets comprises: hot-rolling a steel slab containing, on a mass basis, not more than 0.005% of C, not more than 8.0% of Si, 0.03 to 3.0% of Mn, not more than 0.2% of P, not more than 0.005% of S, not more than 3.0% of Al, not more than 0.005% of N, not more than 3% of Ni, not more than 5% of Cr, not more than 0.005% of Ti, not more than 0.003% of Nb, not more than 0.005% of As, and not more than 0.005% of O; cold-rolling the steel sheet once or multiple times with intermediate annealing in between, after or without annealing the hot-rolled steel sheet; and finish annealing the steel sheet. The finish annealing process includes a temperature elevating step wherein the average temperature elevation rate from 600 DEG C to 700 DEG C is not less than 50 DEG C/sec. This method allows a high magnetic flux density to be stably provided even when carrying out rapid heating in the finish annealing process for the purpose of providing an improved texture.

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