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公开(公告)号：US10532386B2
公开(公告)日：2020-01-14
申请号：US15540355
申请日：2016-01-13
发明人： Toshiaki Mizoguchi , Hiroaki Uchiyama , Hideaki Sakurai , Ryousuke Takata , Shinji Nagai , Shuntaro Imai , Daisuke Sakai
摘要： A continuous-cast slab is provided where central porosity is reduced by surly crushing the slab. A method and apparatus of manufacturing the slab is also provided. The continuous-cast slab having horizontally symmetrical granular equiaxed crystals at least in the center in the thickness direction includes a first reduction dent and a second reduction dent that further dents from the bottom surface of the first reduction dent and is narrower than the first reduction dent at least on one long side surface. Such a configuration can makes it possible to achieve the continuous-cast slab of no more than 2.5×10−4 cm3/g in a maximum porosity volume while segregation is reduced.
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公开(公告)号：US10259037B2
公开(公告)日：2019-04-16
申请号：US15535439
申请日：2016-03-31
IPC分类号： B22D11/115 , B22D11/18 , B22D11/04 , B22D11/11 , B22D11/041
摘要： A primary object of the present invention is to provide a technique of avoiding occurrence of surface defects caused by an electromagnetic brake while checking internal defects with this electromagnetic brake, so that cleanliness of a cast steel can be improved compared with prior arts, and the present invention provides a method for continuously casting steel, the method comprising supplying molten steel into a mold while applying an electromagnetic brake to an outlet flow discharged from an outlet port of an immersion nozzle, wherein magnetic flux density (B) of the electromagnetic brake is within a range of the following (Formula 1): B min ≤ B ≤ B max , B min = 800 · ( D max D 0 ) 3 · ( H SEN H 0 ) ( v · sin θ ) , and B max = 3000 · ( D max D 0 ) 3 · ( H SEN H 0 ) ( v · sin θ ) 2 . ( Formula 1 )
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公开(公告)号：US10512970B2
公开(公告)日：2019-12-24
申请号：US16255904
申请日：2019-01-24
IPC分类号： B22D11/04 , B22D11/041 , B22D11/115 , B22D11/18 , B22D11/11
摘要： A primary object of the present invention is to provide a technique of avoiding occurrence of surface defects caused by an electromagnetic brake while checking internal defects with this electromagnetic brake, so that cleanliness of a cast steel can be improved compared with prior arts, and the present invention provides a method for continuously casting steel, the method comprising supplying molten steel into a funnel mold while applying an electromagnetic brake to an outlet flow discharged from an outlet port of an immersion nozzle, wherein magnetic flux density (B) of the electromagnetic brake is within a range of the following (Formula 1): B min ≤ B ≤ B max , B min = 800 · ( D max D 0 ) 3 · ( H SEN H 0 ) ( v · sin θ ) , and B max = 3000 · ( D max D 0 ) 3 · ( H SEN H 0 ) ( v · sin θ ) 2 . ( Formula 1 )
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公开(公告)号：US09782824B2
公开(公告)日：2017-10-10
申请号：US14766041
申请日：2014-04-28
发明人： Shuntaro Imai , Yasuo Maruki , Daisuke Miki , Hiroaki Uchiyama
IPC分类号： B21B1/46 , B22D11/12 , B22D11/128 , B21B27/02 , B21B13/22
CPC分类号： B22D11/12 , B21B1/46 , B21B13/22 , B21B27/021 , B22D11/1206 , B22D11/1282 , B22D11/1287
摘要： Continuous casting equipment includes a casting product reduction apparatus and a casting product drawing apparatus, the casting product reduction apparatus including a pair of casting product reduction rolls that sandwich and apply pressure to a casting product and being configured to apply reduction to the casting product, the casting product drawing apparatus being provided in a following stage of the casting product reduction apparatus and configured to sandwich and draw the casting product with a pair of casting product drawing rolls. At least one of the pair of casting product reduction rolls includes a large-diameter part that projects radially outward in an axial-direction center region and applies pressure to a width-direction center region of the casting product. The casting product that is subjected to reduction by the casting product reduction apparatus has a depressed part corresponding to the large-diameter part. At least one of the pair of casting product drawing rolls of the casting product drawing apparatus includes a depressed part supporting part that contacts with and supports the depressed part, and is driven by a driving mechanism. An axial-direction length L2 of the depressed part supporting part and an axial-direction length L1 of the large-diameter part of the casting product reduction roll satisfy 0.5×L1≦L2
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