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    • 7. 发明授权
    • Non-oriented silicon steel sheet and method
    • 无取向硅钢板及方法
    • US5676771A
    • 1997-10-14
    • US711756
    • 1996-09-05
    • Koji YanoAtsuhito HondaTakashi ObaraMinoru Takashima
    • Koji YanoAtsuhito HondaTakashi ObaraMinoru Takashima
    • C21D8/12C22C38/02C22C38/06
    • C21D8/1205C21D8/1272C22C38/02
    • A non-oriented silicon steel sheet having a low core loss contains Si in an amount of about 2.5-5.0 wt % and S restricted to about 0.003 wt % or less and inclusions; the volume ratio of those inclusions having a particle size of about 4 .mu.m or higher to the total volume of inclusions is about 5-60%, and the volume ratio of inclusions having a particle size less than about 1 .mu.m to the total volume of inclusions is about 1-15%; when the sheet contains Mn in an amount of about 0.4-1.5%, and the volume ratio of particles less than 1 .mu.m is about 1-5%, the silicon steel sheet also has a low rotation core loss. The method of manufacturing comprises controlling the change of a cooling speed to about 5.degree. C./s.sup.2 or less in the cooling process of such steel sheet in a finish annealing.
    • 具有低铁损的无取向硅钢板含有约2.5-5.0重量%的Si和限制在约0.003重量%以下的Si和夹杂物; 具有约4μm或更大的粒径的夹杂物与夹杂物的总体积的体积比约为5-60%,并且具有小于约1μm的粒径的夹杂物的体积比与总体积 的夹杂物约为1-15%; 当片材含有约0.4-1.5%的Mn,小于1μm的颗粒的体积比约为1-5%时,硅钢板也具有低的旋转磁芯损耗。 制造方法包括在最终退火中在这种钢板的冷却过程中控制冷却速度的变化为约5℃/ s 2以下。