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1.发明授权公开(公告)号：US06461402B1
公开(公告)日：2002-10-08
申请号：US09601323
申请日：2000-08-07
申请人： Akihiro Morita , Tomoaki Omoto , Yukimasa Iwamoto
发明人： Akihiro Morita , Tomoaki Omoto , Yukimasa Iwamoto
IPC分类号： C21C7076
CPC分类号： B22D11/111
摘要： An object of the present invention is to provide a mold powder for continuous casting of steel whose fluorine content is small, and which enables stable casting, for reducing the corrosion of continuous casting equipment and decreasing the concentration of fluorine in the waste water, well as a method for continuous casting of steel using mold powder. The mold powder for continuous casting of steel of the present invention is characterized by having a chemical composition including 25 to 70 wt % of SiO2, 10 to 50 wt % of CaO, not more than 20 wt % of MgO, and 0 to 2 wt % of F as an unavoidable impurity, where the viscosity of the molten mold powder is not less than 4 poise at 1,300° C.
摘要翻译： 本发明的目的在于提供一种氟含量少的钢的连续铸造用铸型粉末，能够稳定地铸造，以减少连续铸造设备的腐蚀和降低废水中氟的浓度，以及 使用模具粉末连续铸钢的方法。 本发明的钢的连续铸造用铸型粉末的特征在于，具有25〜70重量％的SiO 2，10〜50重量％的CaO，20重量％以下的MgO和0〜2重量％ F为不可避免的杂质的％，其中熔融模具粉末的粘度在1,300℃不低于4泊
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公开(公告)号：US20110094703A1
公开(公告)日：2011-04-28
申请号：US12297984
申请日：2007-04-23
CPC分类号： B22D11/111 , B22D11/16
摘要： The invention provides a method of continuous casting for producing a slab excellent in surface quality by preventing formation of depressions and occurrence of cracking of a slab even in the case of producing a high Al steel having an Al content of 0.1% or more by continuous casting. At the time of continuous casting of a high-Al molten steel containing prescribed chemical components by using a mold powder, a powder containing T—CaO: 35 to 55%, SiO2: 10 to 30%, Al2O3: 4.0% or less (excluding 0%), MgO: 0.2 to 1.0%, Li2O: 7 to 13%, F: 7 to 13%, C: 10.5 to 14%, and inevitable impurities and satisfying 1.6≦[T—CaO]/[SiO2]≦5 and 0.2≦[Li2O]/[SiO2]≦1.1 is used as the mold powder, and operation is carried out while controlling the conditions such as the molten steel surface level fluctuation speed in the mold; the pouring angle of the molten steel in the width direction of the mold; the stroke in the amplitude; and the negative strip time tN defined by a prescribed relational expression.
摘要翻译： 本发明提供了一种连续铸造方法，即使在通过连续铸造生产Al含量为0.1％以上的高Al钢的情况下，也可以防止形成凹陷并发生板坯裂纹，从而制造表面质量优异的板坯 。 在通过使用模具粉末连续铸造含有规定化学成分的高铝钢水时，含有T-CaO的粉末：35〜55％，SiO 2：10〜30％，Al 2 O 3：4.0％以下（不包括 0％），MgO：0.2〜1.0％，Li 2 O：7〜13％，F：7〜13％，C：10.5〜14％，不可避免的杂质，满足1.6＆nlE; [T-CaO] / [SiO2] ; 5和0.2＆nlE; [Li 2 O] / [SiO 2]＆nlE; 1.1用作模具粉末，并且在控制模具中的钢水表面水平波动速度等条件的同时进行操作; 钢水在模具的宽度方向上的倾倒角度; 中风的振幅; 以及由规定的关系表达式定义的负条带时间t N。
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公开(公告)号：US20070009373A1
公开(公告)日：2007-01-11
申请号：US10572959
申请日：2004-09-30
申请人： Tomoaki Omoto , Yukimasa Iwamoto
发明人： Tomoaki Omoto , Yukimasa Iwamoto
CPC分类号： B22D11/111 , C21C7/076 , Y02P10/242
摘要： A powdered molding powder for continuous casting of steel according to the present invention is characterized in that the powder contains less than 0.5 percent by mass (including zero) of carbon black, from 0.5 to 20 percent by mass of carbon powders other than carbon black and from 0.1 to 7.0 percent by mass of carbohydrate powder as a carbonaceous raw material.
摘要翻译： 根据本发明的用于连续铸造钢的粉末成型粉末的特征在于，粉末含有小于0.5质量％（包括零）的炭黑，0.5至20质量％的碳黑以外的碳粉，以及 0.1〜7.0质量％的作为碳质原料的碳水化合物粉末。
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公开(公告)号：US08146649B2
公开(公告)日：2012-04-03
申请号：US12297984
申请日：2007-04-23
CPC分类号： B22D11/111 , B22D11/16
摘要： A method of continuously casting molten steel to produce high surface quality slab by preventing depressions and cracking. The steel is high Al steel having an Al content of 0.1% or more. High-Al molten steel is continuously cast using mold powder containing T—CaO (T—CaO presumes total Ca converted to CaO): 35 to 55%, SiO2: 10 to 30%, Al2O3: 4.0% or less (excluding 0%), MgO: 0.2 to 1.0%, Li2O: 7 to 13%, F: 7 to 13%, C: 10.5 to 14%, and inevitable impurities; and satisfying: 1.6≦[T—CaO]/[SiO2]≦5 and 0.2≦[Li2O]/[SiO2]≦1.1. The method is performed by controlling the molten steel surface level fluctuation speed in the mold; the pouring angle of the molten steel in the width direction of the mold; the stroke in the amplitude; and the negative strip time tN as defined.
摘要翻译： 通过防止凹陷和开裂连续铸造钢水以产生高表面质量的板坯的方法。 该钢是Al含量为0.1％以上的高Al钢。 使用含有T-CaO（T-CaO的总Ca转化为CaO）的模具粉末连续铸造高Al钢水：35〜55％，SiO 2：10〜30％，Al 2 O 3：4.0％以下（不含0％） ，MgO：0.2〜1.0％，Li 2 O：7〜13％，F：7〜13％，C：10.5〜14％，不可避免的杂质; 并满足：1.6＆nlE; [T-CaO] / [SiO2]＆nlE; 5和0.2＆nlE; [Li2O] / [SiO2] 该方法通过控制模具中的钢水表面水平波动速度来进行; 钢水在模具的宽度方向上的倾倒角度; 中风的振幅; 和定义的负剥离时间tN。
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公开(公告)号：US06315809B1
公开(公告)日：2001-11-13
申请号：US09508117
申请日：2000-03-21
申请人： Akihiro Morita , Tomoaki Omoto
发明人： Akihiro Morita , Tomoaki Omoto
IPC分类号： C21B300
CPC分类号： B22D11/111
摘要： A mold powder characterized in that, a weight ratio of CaO to SiO2 in the mold powder is within a range of 0.50 to 1.20, the mold powder contains one or two or more species selected from a group consisting of oxides, carbonates, or fluorides of alkali metals, alkaline earth metals, or other metals, and 0.5 to 5 percent by weight of carbon powder, Li2O content is within a range of 1 to 7 percent by weight, F content is within a range of 0.5 to 8.0 percent by weight, crystallization temperature is within a range of 1000 to 1200° C., surface tension at 1300° C. is 250 dyne/cm or more, and a relationship between viscosity &eegr; (poise) at 1300° C. and casting speed V (m/min) satisfies a range represented by an expression 6.0≦&eegr;V≦100.0. By the present invention, there is provided a mold powder which enables stable casting by reducing the likelihood of powder entrapment into the mold without giving rise to surface crack when casting with a thin-slab continuous caster.
摘要翻译： 一种模具粉末，其特征在于，所述成型粉末中CaO与SiO 2的重量比在0.50〜1.20的范围内，所述成型粉末含有选自氧化物，碳酸酯或氟化物中的一种或两种以上的物质 碱金属，碱土金属或其他金属，和0.5〜5重量％的碳粉，Li 2 O的含量在1〜7重量％的范围内，F含量在0.5〜8.0重量％的范围内， 结晶温度在1000〜1200℃的范围内，1300℃下的表面张力为250达因/厘米或更高，1300℃下的粘度eta（泊）与铸造速度V（m / min）满足由表达式6.0 <= etaV <= 100.0表示的范围。 通过本发明，提供一种模铸粉末，其能够通过降低粉末夹入模具的可能性而不会在用薄板坯连铸机浇铸时引起表面裂纹，从而能够进行稳定的铸造。
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