Method of producing non-oriented electromagnetic steel strip having
superior magnetic properties and appearance
    1.
    发明授权
    Method of producing non-oriented electromagnetic steel strip having superior magnetic properties and appearance 失效
    制造具有优异的磁特性和外观的无取向电磁钢带的方法

    公开(公告)号:US5413640A

    公开(公告)日:1995-05-09

    申请号:US39529

    申请日:1993-03-29

    IPC分类号: C21D8/12 C21D9/46

    CPC分类号: C21D8/1233 C21D8/1266

    摘要: A method of producing a non-oriented electromagnetic steel strip by subjecting a low-carbon steel slab to hot-rolling, cold rolling at a small reduction and first annealing. In order to improve magnetic flux density and surface appearance of the product, specific conditions are employed so as to coarsen the crystalline structure to obtain a controlled and moderate crystal grain size after the annealing. The slab is cold-rolled at a rolling reduction of about 5 to 15% and is subjected to first annealing by heating at a rate of about 3.degree. C./sec or higher and holding the strip for about 5 to 30 seconds at 850.degree. C. to the A.sub.3 transformation temperature of the steel, while controlling the crystal grain size to about 100 to 200 .mu.m after first annealing.

    摘要翻译: 一种通过对低碳钢板进行热轧,以小的还原和第一次退火进行冷轧的方法制造无方向性电磁钢带的方法。 为了提高产品的磁通密度和表面外观,采用特定条件以粗化晶体结构,以在退火后获得受控和适度的晶粒度。 将板坯以约5〜15%的压下率进行冷轧,并以约3℃/秒以上的速度加热进行第一次退火,并在850℃下保持钢带约5〜30秒 C.对钢的A3转化温度,同时在首次退火后将晶粒尺寸控制在约100〜200μm。

    Method of producing grain oriented silicon steel sheets having improved
magnetic properties
    2.
    发明授权
    Method of producing grain oriented silicon steel sheets having improved magnetic properties 失效
    具有改善磁特性的晶粒取向硅钢板的制造方法

    公开(公告)号:US5296050A

    公开(公告)日:1994-03-22

    申请号:US925310

    申请日:1992-08-04

    IPC分类号: C21D8/12 C21D9/46

    CPC分类号: C21D8/1222

    摘要: This invention not only improves the formation of fine crystal structure and hence the magnetic properties as well as surface properties while utilizing the merits of the hot strip mill at maximum by conducting the rough rolling in the steps for the production of grain oriented silicon steel sheets, particularly hot rolling step at a high temperature and a large draft, but also stably achieves the more improvement of the magnetic properties under a high reliability by accurately controlling the precipitation state of inhibitor at a finish rolling stage in the hot rolling step.

    摘要翻译: PCT No.PCT / JP90 / 00586 Sec。 371日期1991年1月7日 102(e)日期1991年1月7日PCT提交1990年5月8日PCT公布。 WO90 / 13673 PCT出版物 日本1990年11月15日。本发明不仅通过在生产步骤中进行粗轧来最大限度地利用热带磨机的优点来改善细晶结构的形成,从而提高磁性能以及表面性能 的晶粒取向硅钢片,特别是在高温下的热轧工序和大的拔模,而且通过在精轧阶段精确控制抑制剂的析出状态,可以在高可靠性下稳定地实现磁性能的提高 热轧步骤

    Apparatus for separating the filament bundle of fibrous material
    3.
    发明授权
    Apparatus for separating the filament bundle of fibrous material 失效
    用于分离纤维材料的细丝束的装置

    公开(公告)号:US4380104A

    公开(公告)日:1983-04-19

    申请号:US225740

    申请日:1981-01-16

    摘要: A fibrous material composed of multifilaments is forced out of a spinneret with a fluid to collide with an impingement plate thereby separating the filaments, said impingement plate having as its impinging surface a material which creates a negative electrical charge on the surfaces of the filaments of the fibrous material upon impingement. This greatly improves separation of the filaments and permits production of non-woven sheets with high uniformity.

    摘要翻译: 由复丝构成的纤维材料被从喷丝头中流出,与冲击板碰撞,从而分离长丝,所述冲击板具有作为其冲击表面的材料,该材料在丝束表面上产生负电荷 冲击时的纤维材料。 这大大改善了长丝的分离并且允许生产具有高均匀性的无纺布片。