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    Low iron loss non-oriented electrical steel sheet excellent in workability and method for producing the same
    1.
    发明授权
    Low iron loss non-oriented electrical steel sheet excellent in workability and method for producing the same 有权
    作业性优良的低铁损无取向电工钢板及其制造方法

    公开(公告)号：US06478892B2

    公开(公告)日：2002-11-12

    申请号：US09827968

    申请日：2001-04-06

    申请人： Ken-ichi Murakami ,  Takashi Morohoshi ,  Tomoji Kumano ,  Ryutaro Kawamata ,  Takeshi Kubota ,  Masafumi Zeze ,  Hidekuni Murakami ,  Shinichi Kanao

    发明人： Ken-ichi Murakami ,  Takashi Morohoshi ,  Tomoji Kumano ,  Ryutaro Kawamata ,  Takeshi Kubota ,  Masafumi Zeze ,  Hidekuni Murakami ,  Shinichi Kanao

    IPC分类号： H01F104

    CPC分类号： C21D8/12 ,  C21D8/1261 ,  C21D8/1272

    摘要： The present invention provides a non-oriented electrical steel sheet having crystal grains of small diameter and excellent workability before stress relief annealing and having crystal grains of largely grown diameter and excellent iron loss property after stress relief annealing and a method for producing the same, and relates to a low iron loss non-oriented electrical steel sheet excellent in workability, containing, in weight %, 0.010% or less of C, 0.1 to 1.5% of Mn, 0.1 to 4% of Si, 0.1 to 4% of Al, wherein the latter three elements satisfy the formula Si+Mn+Al≦5.0%, and 0.0005 to 0.0200% of Mg, or further containing 0.005% or more of Ca, wherein the total amount of Mg and Ca is 0.0200% or less, or further containing 0.005% or more of REM, wherein the total amount of Mg and REM is 0.0200% or less, or further containing 0.005% or more of Ca and REM, wherein the total amount of Mg, Ca and REM is 0.0200% or less, and containing the remainder consisting of Fe and unavoidable impurities.

    摘要翻译： 本发明提供一种在应力消除退火之前具有直径小的晶粒和可加工性优异的无取向电工钢板，其具有大直径生长的晶粒和应力消除退火后的优异的铁损性能及其制造方法， 涉及加工性优异的低铁损无取向电工钢板，其含量为C：0.010％以下，Mn：0.1〜1.5％，Si：0.1〜4％，Al：0.1〜4％ 其中后三种元素满足式Si + Mn + Al <= 5.0％，Mg：0.0005〜0.0200％，进一步含有0.005％以上的Ca，其中Mg和Ca的总量为0.0200％以下， 或进一步含有0.005％以上的REM，其中Mg和REM的总量为0.0200％以下，或进一步含有0.005％以上的Ca和REM，其中Mg，Ca和REM的总量为0.0200％，或 较少，含有余量由Fe和不可避免的impuriti组成 es。

    Method for improving internal center segregation and center porosity of continuously cast strand
    6.
    发明授权
    Method for improving internal center segregation and center porosity of continuously cast strand 失效
    改善内部中心分离和连续铸造中心孔隙度的方法

    公开(公告)号：US5083604A

    公开(公告)日：1992-01-28

    申请号：US700546

    申请日：1991-05-15

    申请人： Masafumi Zeze ,  Hideyuki Misumi ,  Tokinari Shirai ,  Takashi Nishihara

    发明人： Masafumi Zeze ,  Hideyuki Misumi ,  Tokinari Shirai ,  Takashi Nishihara

    IPC分类号： B22D11/12 ,  B22D11/128 ,  B22D11/20

    CPC分类号： B22D11/1206 ,  B22D11/1288 ,  B22D11/20

    摘要： A method for improving the internal center segregation and center porosity of a continuously cast slab, wherein an unsolidified side edge portion and a given area at the upstream side of the cast slab during continuous casting are defined as a plane reducing zone; a holding means is provided having two sets of top and bottom walking plane reducing compressing means at the plane reducing zone, front and rear supporting shafts common to the sets, eccentric cams for each set arranged at the front and the rear supporting shafts for holding and releasing of the cast slab, and a front and a rear displacement mechanism; the cast slab holding position of the upper surface of the bottom side walking plane reducing means of each set is set within 0.5 mm of the deviation on a passline of a continuous casting machine; the cast slab holding position of the lower surface of the top walking plane reducing means of each set is set at a desired reduction taper having a plane reduction ratio of 0.5 to 5.0% in accordance with an amount of solidified shrinkage of an unsolidified cast slab in a longitudinal compressing plane reducing zone and an amount of the heat shrinkage of the solidified shell; said eccentric cam set and the front and the rear displacement mechanisms are driven to operate the holding, moving forward, opening, and moving backward alternately thereby compressively carrying the cast slab; wherein the improvement comprises the steps of measuring, for each the two sets of plane reducing means the holding distance of the cast slab at before and after the top and the bottom walking plane reducing means, obtaining reduction taper from the measured holding distances and predetermined distances of distance measured positions before and after the top and the bottom walking plane reducing means, obtaining the difference between the reduction taper, then controlling positions of the front and the rear supporting shafts so that each set of walking plane reducing means is given to the desired reduction taper when the obtained difference is 0.1 mm/m or less, and bringing the walking plane reducing means having the measured reduction taper least different from the desired reduction taper close to the other measured reduction taper by changing the plane reduction ratio within a range of 0.5 to 5.0% by controlling the amount of rotation for releasing the holding of the eccentric cams, when the difference is more than 0.1 mm/m and the reduction taper are all less than said desired reduction taper.

    Continuous casting method of multi-layered slab
    7.
    发明授权
    Continuous casting method of multi-layered slab 失效
    多层板连铸法

    公开(公告)号：US5269366A

    公开(公告)日：1993-12-14

    申请号：US955863

    申请日：1992-12-09

    申请人： Masafumi Zeze ,  Takashi Sawai ,  Eiichi Takeuchi

    发明人： Masafumi Zeze ,  Takashi Sawai ,  Eiichi Takeuchi

    IPC分类号： B22D11/115 ,  B22D27/02 ,  B22D11/18 ,  B22D19/08

    CPC分类号： B22D11/115

    摘要： Two kinds of molten steels are poured into a continuous casting mold. Direct current magnetic flux is applied which direct current magnetic flux extends in a direction transverse to the thickness (corresponding to the thickness of a casting slab) of the poured content at a position of a certain height of the mold. The molten steels are supplied above and below a boundary of static magnetic fields formed by the direct current magnetic flux longitudinally or in a casting direction. When a difference (.DELTA..rho.) between a density .rho..sub.1 of the molten steel for an outer layer supplied above the static magnetic fields and a density .rho..sub.2 of the molten steel for an inner layer supplied below the static magnetic fields, is expressed by .DELTA..rho.=.rho..sub.1 -.rho..sub.2 (g/cm.sup.3), a density (tesla) of the direct current magnetic flux is determined by the following formula:a) in case of .DELTA..rho.