公开(公告)号：EP0709470B1

公开(公告)日：2001-10-04

申请号：EP95900316.1

申请日：1994-11-09

申请人： POHANG IRON & STEEL CO., LTD. ,  RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY

发明人： CHOI, Gyu Seung, Res.Inst.of Ind.Science & Tech ,  LEE, Chung San, Res.Inst.of Ind. Science & Tech ,  WOO, Jong Soo, Res. Inst.of Ind. Science & Tech. ,  HONG, Byung D., Res. Inst. of Ind.Science & Tech.

IPC分类号： C21D8/12 ,  C22C38/02

CPC分类号： C22C38/02 ,  C21D3/04 ,  C21D8/1205 ,  C21D8/1266 ,  G06T9/004

摘要： This invention relates to a production method of a directional electromagnetic steel sheet used as a core material for a transformer, a motor, a generator, and other electromagnetic appliances. A component system is designed so that a directional electromagnetic steel sheet of a conventional system is heat-treated at approximately 1,250 to 1,300 DEG C which is the same slab heating temperature as in the treating condition of general steels, and is then hot rolled. In this way, the present invention only requires operation in existing production processes without reinforcing the installation or establishing a new one, and stably forms secondary recrystallization in the (110) [001] orientation by securing stably a grain growth restriction force. Therefore, the present invention provides an improved directional electromagnetic steel sheet production method in which a preliminary annealing step is omitted, decarbonization/annealing is carried out at an intermediate thickness and machining energy at a final rolling step is lowered, so as to obtain stable magnetic characteristics. The gist of the present invention resides in a method of producing a directional electromagnetic steel sheet comprising hot rolling, after heating, a slab having a composition consisting, in terms of wt.%, of 0.035 to 0.050 % of C, 2.9 to 3.3 % of Si, not greater than 0.015 % of P, 0.011 to 0.017 % of dissolved Al, 0.0080 to 0.012 % of N, not greater than 0.007 % of S, 0.06 to 0.18 % of Ni+Cr, not greater than 0.32 % of Mn satisfying the condition of Mn/S: 20 or more, not greater than 0.6 % of Cu satisfying the condition Cu/Mn: 1.5 or more, and the balance of Fe, at 1,250 to 1,320 DEG C, regulating the rolled sheet to a final thickness by two cold rolling operations including an intermediate decarbonization/annealing without conducting annealing of the hot rolled sheet, then effecting intermediate annealing and annealing using MgO as the principal component, applying a separating agent, and thereafter conducting final finish annealing to produce a directional electromagnetic steel sheet having excellent magnetic characteristics.

公开(公告)号：EP0709470A1

公开(公告)日：1996-05-01

申请号：EP95900316.1

申请日：1994-11-09

申请人： POHANG IRON & STEEL CO., LTD. ,  RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY

发明人： CHOI, Gyu Seung, Res.Inst.of Ind.Science & Tech ,  LEE, Chung San, Res.Inst.of Ind. Science & Tech ,  WOO, Jong Soo, Res. Inst.of Ind. Science & Tech. ,  HONG, Byung D., Res. Inst. of Ind.Science & Tech.

IPC分类号： C21D8/12

CPC分类号： C22C38/02 ,  C21D3/04 ,  C21D8/1205 ,  C21D8/1266 ,  G06T9/004

摘要： This invention relates to a production method of a directional electromagnetic steel sheet used as a core material for a transformer, a motor, a generator, and other electromagnetic appliances. A component system is designed so that a directional electromagnetic steel sheet of a conventional system is heat-treated at approximately 1,250 to 1,300°C which is the same slab heating temperature as in the treating condition of general steels, and is then hot rolled. In this way, the present invention only requires operation in existing production processes without reinforcing the installation or establishing a new one, and stably forms secondary recrystallization in the (110) [001] orientation by securing stably a grain growth restriction force. Therefore, the present invention provides an improved directional electromagnetic steel sheet production method in which a preliminary annealing step is omitted, decarbonization/annealing is carried out at an intermediate thickness and machining energy at a final rolling step is lowered, so as to obtain stable magnetic characteristics. The gist of the present invention resides in a method of producing a directional electromagnetic steel sheet comprising hot rolling, after heating, a slab having a composition consisting, in terms of wt.%, of 0.035 to 0.050 % of C, 2.9 to 3.3 % of Si, not greater than 0.015 % of P, 0.011 to 0.017 % of dissolved Al, 0.0080 to 0.012 % of N, not greater than 0.007 % of S, 0.06 to 0.18 % of Ni+Cr, not greater than 0.32 % of Mn satisfying the condition of Mn/S: 20 or more, not greater than 0.6 % of Cu satisfying the condition Cu/Mn: 1.5 or more, and the balance of Fe, at 1,250 to 1,320 °C, regulating the rolled sheet to a final thickness by two cold rolling operations including an intermediate decarbonization/annealing without conducting annealing of the hot rolled sheet, then effecting intermediate annealing and annealing using MgO as the principal component, applying a separating agent, and thereafter conducting final finish annealing to produce a directional electromagnetic steel sheet having excellent magnetic characteristics.

摘要翻译： 本发明涉及用作芯材料用于变压器，电动机，发电机，和其它电磁设备方向性电磁钢板的制造方法。 A组分系统设计成没有一个传统的系统的定向性电磁钢板进行热处理在约1250至1300°C所有这是相同的板坯加热温度在一般钢的处理条件，然后热轧。 以这种方式，本发明仅需要在现有的生产工艺没有增强安装或建立一个新的工作，并稳定地通过确保Ä001Ü稳定晶粒生长限制力形成二次再结晶在（110）取向。 因此，本发明提供了改进的电磁定向钢板制造方法，其中，省略了初步退火步骤，脱碳/退火在在中间厚度和加工能量开展在最终轧制步骤被降低，以便获得稳定的磁 特点。 本发明的要点在于在制造方向性电磁钢板，其包括热轧的方法，在加热之后，具有到C的0.050％的组成由......组成，以重量％，0.035术语中，板坯2.9至3.3％ 的Ni +的Cr，不大于0.32％的Mn，18％为Si，不大于0.015％的P，熔解Al的0.011〜0.017％以下，N，S不大于0.007％，12点06分至00 0.0080〜0.012％的 满足的Mn / S的条件：20以上，铜的不大于0.6％，满足条件铜/锰：1.5以上，和余量的Fe组成，在1250至1320℃时，热轧板调节至最终 由两个冷轧操作，包括在中间脱碳/退火不进行热轧板的退火，然后 - 影响使用MgO作为主成分的中间退火和退火，施加分离剂，然后进行最终成品退火，以产生定向电磁厚度 钢玉树 具有优异磁特性吨。