公开(公告)号：US06451087B2

公开(公告)日：2002-09-17

申请号：US09852634

申请日：2001-05-11

申请人： Yoshio Bizen ,  Setsuo Mishima ,  Takashi Meguro

发明人： Yoshio Bizen ,  Setsuo Mishima ,  Takashi Meguro

IPC分类号： C22C3304

CPC分类号： C22C1/03 ,  C22C33/003 ,  C22C45/02

摘要： The method for producing a mother alloy for an iron-based amorphous alloy has the steps of (a) melting raw materials for elements constituting the amorphous alloy together with at least one oxide of an element constituting the amorphous alloy, the raw materials containing aluminum as an inevitable impurity, and the oxide having a smaller standard free energy of formation than that of Al2O3 in an absolute value; and (b) removing the resultant Al2O3 from the melt, thereby reducing the content of aluminum to 50 ppm or less in the melt.

摘要翻译： 制造铁基非晶合金母合金的方法具有以下步骤：（a）将构成非晶合金的元素的原料与至少一种构成非晶态合金的元素的氧化物一起熔化，将含铝的原料作为 不可避免的杂质，氧化物的绝对值比Al2O3的标准自由能更小; 和（b）从熔体中除去所得的Al 2 O 3，从而在熔体中将铝的含量降低到50ppm以下。

公开(公告)号：US07597737B2

公开(公告)日：2009-10-06

申请号：US10574839

申请日：2004-04-30

申请人： Ken-ichiro Hara ,  Hidemi Takao ,  Setsuo Mishima ,  Etsuo Fujita

发明人： Ken-ichiro Hara ,  Hidemi Takao ,  Setsuo Mishima ,  Etsuo Fujita

IPC分类号： C21C7/10 ,  C22B9/04 ,  C22B9/16

CPC分类号： C21C7/0006 ,  C21C7/10 ,  C21C2300/08 ,  C22B9/04 ,  C22B26/22 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/105 ,  C22C38/12 ,  C22C38/14 ,  C22C38/42

摘要： A method for producing a steel ingot, which comprises an Mg oxide forming step of preparing a molten steel containing Mg in an amount sufficient for the molten steel to have an oxide composition having MgO as a primary component and a dissociation step of keeping the pressure of the atmosphere around the molten steel to be lower than that in the Mg oxide forming step, to thereby dissociate MgO to Mg and oxygen and reduce the content of Mg in the steel to 50% or less of that in the Mg oxide forming step through the diffusion thereof into a gas phase. A preferred method further involves a solidifying step.

摘要翻译： 一种钢锭的制造方法，其特征在于，包括Mg氧化物形成工序，所述Mg氧化物形成工序是将含有足够量的含有Mg的含有Mg的氧化物组合物作为主要成分的Mg的钢水， 钢水周围的气氛低于Mg氧化物形成工序中的气氛，由此将MgO分解为Mg和氧，并将钢中的Mg含量降低至Mg氧化物形成工序中的Mg的含量的50％以下 其扩散进入气相。 优选的方法还包括固化步骤。

公开(公告)号：US07445678B2

公开(公告)日：2008-11-04

申请号：US10715568

申请日：2003-11-19

申请人： Setsuo Mishima ,  Hidemi Takao ,  Ken-ichiro Hara ,  Etsuo Fujita

发明人： Setsuo Mishima ,  Hidemi Takao ,  Ken-ichiro Hara ,  Etsuo Fujita

IPC分类号： C22C3/00 ,  C22C29/16 ,  C21D3/00 ,  C21B7/04

CPC分类号： C22C38/004 ,  C21C7/04 ,  C22B9/20 ,  C22C38/06 ,  C22C38/105 ,  C22C38/12 ,  C22C38/14

摘要： Disclosed is a method of producing maraging steel, which includes producing a consumable electrode for vacuum remelting; and subjecting the consumable electrode to the vacuum remelting. The consumable electrode contains not less 5 ppm Mg. Disclosed is also a maraging steel containing, by mass %, at least, from more than zero to less than 10 ppm Mg, less than 10 ppm oxygen, and less than 15 ppm nitrogen. The steel contains also nitride inclusions having a maximum length of not more than 15 μm and oxide inclusions having a maximum length of not more than 20 μm. Regarding the oxide inclusions, a content rate of spinel form inclusions having a length of not less than 10 μm to a total content of the spinel form inclusions having a length of not less than 10 μm and alumina inclusions having a length of not less than 10 μm exceeds 0.33 (i.e. 33%).

摘要翻译： 公开了一种生产马氏体时效钢的方法，其包括生产用于真空重熔的消耗电极; 并对消耗性电极进行真空重熔。 消耗电极含有不少于5ppm的Mg。 公开了一种马氏体时效钢，其质量％至少含有从零到小于10ppm的Mg，小于10ppm的氧和小于15ppm的氮。 该钢还含有最大长度不大于15μm的氮化物夹杂物和最大长度不大于20μm的氧化物夹杂物。 关于氧化物夹杂物，长度不小于10μm的尖晶石型夹杂物的总长度不小于10μm的尖晶石型夹杂物的含量率和长度不小于10的氧化铝夹杂物 妈妈超过0.33（即33％）。

公开(公告)号：US20070039418A1

公开(公告)日：2007-02-22

申请号：US10574839

申请日：2004-04-30

申请人： Ken-ichiro Hara ,  Hidemi Takao ,  Setsuo Mishima ,  Etsuo Fujita

发明人： Ken-ichiro Hara ,  Hidemi Takao ,  Setsuo Mishima ,  Etsuo Fujita

IPC分类号： C21C7/10

CPC分类号： C21C7/0006 ,  C21C7/10 ,  C21C2300/08 ,  C22B9/04 ,  C22B26/22 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/105 ,  C22C38/12 ,  C22C38/14 ,  C22C38/42

摘要： A method for producing a steel ingot, which comprises an Mg oxide forming step of preparing a molten steel containing Mg in an amount sufficient for the molten steel to have an oxide composition having MgO as a primary component and a dissociation step of keeping the pressure of the atmosphere around the molten steel to be lower than that in said Mg oxide forming step, to thereby dissociate MgO to Mg and oxygen and reduce the content of Mg in the steel to 50% or less of that in the Mg oxide forming step through the diffusion thereof into a gas phase; and a preferred method further comprising a solidifying step, which comprises an Mg oxide forming step of preparing a first molten steel containing Mg in an amount sufficient for the molten steel to have an oxide composition having MgO as a primary component, a step of solidifying the molten steel, and a dissociation step of melting the resultant solid again under a pressure of an atmosphere lower than that in the case of the first molten steel, to thereby dissociate MgO to Mg and oxygen and reduce the content of Mg in the steel to 50% or less of that in the above solid before re-melting through the diffusion thereof into a gas phase.

摘要翻译： 一种钢锭的制造方法，其特征在于，包括Mg氧化物形成工序，所述Mg氧化物形成工序是将含有足够量的含有Mg的含有Mg的氧化物组合物作为主要成分的Mg的钢水， 钢水周围的气氛低于Mg氧化物形成工序中的气氛，从而将MgO离解为Mg和氧，并将钢中的Mg含量降低至Mg氧化物形成步骤中的Mg的含量的50％以下，通过 其扩散到气相中; 优选的方法还包括固化步骤，该固化步骤包括Mg氧化物形成步骤，其制备含有足够量的含有Mg的量的具有MgO作为主要组分的氧化物组合物的Mg的第一钢水， 以及在比第一钢水低的气氛的压力下再次熔融所得固体的解离步骤，从而将MgO离解为Mg和氧，并将钢中的Mg含量降低至50 在通过其扩散进入气相再熔融之前，在上述固体中的百分比或更少。