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    Method for cleaning molten metal and apparatus therefor
    1.
    发明授权
    Method for cleaning molten metal and apparatus therefor 失效
    清洗熔融金属的方法及其设备

    公开(公告)号：US5091000A

    公开(公告)日：1992-02-25

    申请号：US516478

    申请日：1990-04-30

    申请人： Toshio Ishii ,  Yutaka Okubo ,  Shuzo Fukuda ,  Yoshihiko Kawai ,  Shunichi Sugiyama ,  Yoshiteru Kikuchi ,  Hidetoshi Matsuno

    发明人： Toshio Ishii ,  Yutaka Okubo ,  Shuzo Fukuda ,  Yoshihiko Kawai ,  Shunichi Sugiyama ,  Yoshiteru Kikuchi ,  Hidetoshi Matsuno

    IPC分类号： C21C5/56 ,  C21C7/00 ,  C21C7/072 ,  C21C7/10 ,  C22B9/05

    CPC分类号： C22B9/05 ,  C21C7/0081 ,  C21C7/072 ,  C21C7/10 ,  C21C5/567

    摘要： Molten metal is put under pressure of up to 10 atmospheres in a covered ladle and a gas soluble in the metal is bubbled through the melt. Some gas goes into solution, while the remainder rises in bubbles and brings inclusions suspended in the molten metal up to the surface. Then the pressure is lowered, after which gas comes out of the solution in fine bubbles which also bring impurity inclusions up to the surface. In another method molten steel is refined at pressures not exceeding atmospheric pressure in a covered ladle equipped for evacuation and equipped for bubbling gas through the molten steel bath. Bubbling followed by pressure reduction can then be performed to form two stages of cleaning. Heat may be added for compensating the cooling effect of gas expansion. Instead of a closed ladle, an open ladle may be used, into which there can be dipped a chamber fitted for evacuation and having two large tubes at opposite sides of the chamber extending downwards to orifices that may be lowered into the molten metal in the ladle. The melt is then drawn up into the chamber by atmospheric pressure as the chamber is evacuated. Then bubbling may be performed in one connecting tube by injection of gas from the bottom of the ladle, or at a mid-level of the tube, to produce circulation of the molten metal up into the chamber and down through the other tube.

    摘要翻译： 在覆盖的钢包中将熔融金属置于高达10个大气压的压力下，溶解在金属中的气体通过熔体鼓泡。 一些气体进入溶液，而其余的气体会上升，并使悬浮在熔融金属中的夹杂物直到表面。 然后降低压力，之后，气体从微细气泡中排出，这也使杂质夹杂物直到表面。 在另一种方法中，在装备用于抽空并且用于鼓泡气体通过钢水浴的装备的覆盖钢包中，将钢水在不超过大气压的压力下精炼。 然后可以进行鼓泡，然后进行减压以形成两个阶段的清洁。 可以添加热量来补偿气体膨胀的冷却效果。 可以使用开放的钢包，而不需要一个开放的钢包，其中可以浸入一个适于抽真空的室，并且在室的相对侧有两个较大的管子向下延伸到可以放入钢包中的熔融金属的孔中 。 随着室被抽真空，熔体随后通过大气压被拉入腔室。 然后可以在一个连接管中通过从钢包的底部注入气体或在管的中间层进行鼓泡，以产生熔融金属向上流入腔室并向下通过另一个管的循环。

    Fe-Ni alloy cold-rolled sheet excellent in cleanliness and etching pierceability
    4.
    发明授权
    Fe-Ni alloy cold-rolled sheet excellent in cleanliness and etching pierceability 失效
    Fe-Ni合金冷轧板清洁度和蚀刻性能优异

    公开(公告)号：US5391241A

    公开(公告)日：1995-02-21

    申请号：US247528

    申请日：1994-05-23

    申请人： Atsushi Watanabe ,  Teruyuki Hasegawa ,  Tadashi Inoue ,  Tomoyoshi Okita ,  Yoshiteru Kikuchi ,  Hidetoshi Matsuno

    发明人： Atsushi Watanabe ,  Teruyuki Hasegawa ,  Tadashi Inoue ,  Tomoyoshi Okita ,  Yoshiteru Kikuchi ,  Hidetoshi Matsuno

    IPC分类号： C22C19/03 ,  C22F1/10 ,  H01F1/147 ,  C22C38/08

    CPC分类号： H01F1/14716 ,  C22C19/03 ,  C22F1/10

    摘要： An Fe--Ni alloy cold-rolled sheet excellent in cleanliness and etching pierceability prepared as specified in the claims, which consists essentially of: 30 to 45 wt. % nickel, 0.1 to 1 wt. % manganese, 0.003 to 0.03 wt. % aluminum and the balance being iron and incidental impurities comprising up to 0.4 wt. % silicon, up to 0.1 wt. % chromium, up to 0.005 wt. % carbon, up to 0.005 wt. % nitrogen, up to 0.005 wt. % sulfur, up to 0.010 wt. % phosphorus, up to 0.002 wt. % oxygen, and up to 0.002 wt. % as converted into oxygen for non-metallic inclusions. The non-metallic inclusions contain at least CaO, Al.sub.2 O.sub.3 and MgO, and the composition thereof is in a region of a melting point of at least 1,600.degree. C., which region is defined by the liquidus curve of 1,600.degree. C. in the CaO--Al.sub.2 O.sub.3 --MgO ternary phase diagram. The non-metallic inclusions have a particle size of up to 6 .mu.m.

    摘要翻译： 一种如权利要求书所述制备的清洁度和蚀刻可穿透性优异的Fe-Ni合金冷轧板，其基本上由以下组成：30〜45重量％ ％镍，0.1〜1重量％ ％锰，0.003〜0.03重量％ ％铝，余量为铁和杂质含量高达0.4wt。 ％硅，至多0.1wt。 ％铬，至多0.005重量％ ％碳，至多0.005重量％ ％氮，至多0.005重量％ ％硫，至多0.010wt。 ％磷，至多0.002重量％ ％氧，最高0.002wt。 ％转化为非金属夹杂物的氧气。 非金属夹杂物至少含有CaO，Al 2 O 3和MgO，其组成在熔点至少为1600℃的区域，该区域由CaO的液相线曲线为1600℃ -Al2O3-MgO三元相图。 非金属夹杂物的粒径可达6μm。

    Method for manufacturing an Fe-Ni cold-rolled sheet excellent in cleanliness and etching pierceability
    5.
    发明授权
    Method for manufacturing an Fe-Ni cold-rolled sheet excellent in cleanliness and etching pierceability 失效
    制造清洁度和蚀刻穿透性优异的Fe-Ni冷轧板的方法

    公开(公告)号：US5207844A

    公开(公告)日：1993-05-04

    申请号：US887385

    申请日：1992-05-18

    申请人： Atsushi Watanabe ,  Teruyuki Hasegawa ,  Tadashi Inoue ,  Tomoyoshi Okita ,  Yoshiteru Kikuchi ,  Hidetoshi Matsuno

    发明人： Atsushi Watanabe ,  Teruyuki Hasegawa ,  Tadashi Inoue ,  Tomoyoshi Okita ,  Yoshiteru Kikuchi ,  Hidetoshi Matsuno

    IPC分类号： C22C19/03 ,  C22F1/10 ,  H01F1/147

    CPC分类号： C22C19/03 ,  C22F1/10 ,  H01F1/14716

    摘要： A method for manufacturing an Fe-Ni alloy cold-rolled sheet excellent in cleanliness and etching pierceability, comprising: preparing an Fe-Ni molten alloy, containing 30 to 45 wt. % nickel, and subjected to dephosphorization and decarburization; adding aluminum and flux to the Fe-Ni molten alloy in a ladle made of an MgO-CaO refractory containing 20 to 45 wt. %; strongly stirring the Fe-Ni molten alloy which contains the added aluminum and flux in the ladle to produce a CaO-Al.sub.2 O.sub.3 -MgO slag so as to react the Fe-Ni molten alloy with the CaO-Al.sub.2 O.sub.3 -MgO slag to deoxidize the Fe-Ni molten alloy while controlling a value of activity of SiO.sub.2 from 0.001 to 0.005 and a value of activity of Al.sub.2 O.sub.3 from 0.1 to 0.3 in the CaO-Al.sub.2 O.sub.3 -MgO slag, and the CaO-Al.sub.2 O.sub.3 -MgO slag having the following chemical composition: CaO and Al.sub.2 O.sub.3 : at least 57 wt. %, wherein the ratio of CaO/(CaO+Al.sub.2 O.sub.3) being at least 0.45, MgO: up to 25 wt. %, SiO.sub.2 : up to 15 wt. %, and oxides of metals having an oxygen affinity lower than that of silicon: up to 3 wt. % in total; casting the deoxidized Fe-Ni molten alloy into an ingot; and blooming, hot-rolling and cold-rolling the ingot to manufacture an Fe-Ni alloy cold-rolled sheet containing non-metallic inclusions comprising a composition in a region of a melting point of at least 1,600.degree. C., which region is defined by a liquidus curve of 1,600.degree. C. in a CaO-Al.sub.2 O.sub.3 -MgO ternary phase diagram and having a particle size up to 6 .mu.m in a total amount of up to 0.002 wt. % as converted into oxygen.

    摘要翻译： 一种制造清洁度和蚀刻可穿透性优异的Fe-Ni合金冷轧板的方法，包括：制备含有30〜45重量％的Fe-Ni合金， 镍，并进行脱磷脱碳; 在由含有20〜45重量％的MgO-CaO耐火材料制成的钢包中的Fe-Ni熔融合金中添加铝和助熔剂。 ％; 强烈搅拌包含添加的铝的Fe-Ni熔融合金和钢包中的助熔剂，以生产CaO-Al2O3-MgO矿渣，使Fe-Ni熔融合金与CaO-Al2O3-MgO炉渣反应，使Fe- Ni熔融合金，同时在CaO-Al 2 O 3 -MgO炉渣中控制SiO 2的活性值为0.001〜0.005，Al 2 O 3的活性值为0.1〜0.3，CaO-Al 2 O 3 -MgO渣具有以下化学成分：CaO 和Al 2 O 3：至少57wt。 ％，其中CaO /（CaO + Al 2 O 3）的比例为至少0.45，MgO：至多25wt。 ％，SiO 2：至多15wt。 ％，氧亲和力低于硅的金属氧化物：高达3wt。 ％ 总共; 将脱氧Fe-Ni熔融合金铸造成锭; 并且对该锭进行开花，热轧和冷轧，以制造含有非金属夹杂物的Fe-Ni合金冷轧板，所述非金属夹杂物包含在至少1600℃的熔点区域中的组合物，该区域被定义 通过在CaO-Al 2 O 3 -MgO三元相图中的1600℃的液相线曲线，并且具有高达6,000μm的粒径，总量达到0.002wt。 ％转化为氧气。