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    • 6. 发明授权
    • Process for producing a grain-oriented electromagnetic steel sheet or
strip having a low watt loss and a grain-oriented electromagnetic steel
strip having uniform magnetic properties
    • 具有低瓦特损耗的方向性电磁钢板或带材的制造方法和具有均匀磁特性的晶粒取向电磁钢带
    • US4493739A
    • 1985-01-15
    • US405107
    • 1982-08-04
    • Koichi FujiwaraTomohiko SakaiYoneo YamadaKazutaka Higashine
    • Koichi FujiwaraTomohiko SakaiYoneo YamadaKazutaka Higashine
    • C22C38/00C21D8/12H01F1/16H01F1/04
    • C21D8/1222
    • In the production of a grain-oriented electromagnetic steel strip or sheet having a low watt loss, a silicon steel slab containing not more than 0.085% by weight of carbon, from 2.0% to 4.0% by weight of silicon, from 0.030% to 0.090% by weight of manganese, and from 0.010% to 0.060% by weight of sulfur is conventionally hot-rolled, cold-rolled, and final-annealed. However, this production process involves some problems in regard to the uniformity of the magnetic properties along the full length of the coiled strip. According to the present invention, a silicon steel slab additionally contains from 0.02% to 0.2% by weight of copper, the exit temperature during the finishing-hot-rolling step is controlled in such a manner that the temperature of the top portion of the hot-rolled strip is in the range of from 900.degree. C. to 1050.degree. C. and the temperature of the middle and bottom portions thereof is in the range of from 950.degree. C. and 1150.degree. C., and final cold-rolling is carried out at a reduction ratio of from 50% to 80%, with the result that the final product has good and very uniform magnetic properties over the full length thereof.
    • 在制造具有低瓦特损耗的晶粒取向的电磁钢带或片材的情况下,将含有不大于0.085重量%的碳,2.0重量%至4.0重量%的硅,0.030%至0.090的硅钢板 锰的重量%,以及0.010〜0.060重量%的硫,通常是热轧,冷轧,最终退火。 然而,该制造方法涉及沿着盘绕条的全长的磁性能的均匀性方面的一些问题。 根据本发明,硅钢板另外含有0.02重量%至0.2重量%的铜,整理热轧步骤中的出口温度以这样的方式进行控制,使得热的顶部的温度 轧制带材在900℃至1050℃的范围内,其中部和底部的温度在950℃至1150℃的范围内,最终的冷轧是 以50%至80%的减压比进行,结果是最终产品在其全长上具有良好且非常均匀的磁性能。