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    • 3. 发明授权
    • Method of manufacturing clean steel
    • 清洁钢的制造方法
    • US4944798A
    • 1990-07-31
    • US363570
    • 1989-06-07
    • Tohei Ototani
    • Tohei Ototani
    • C21C7/04C21C7/00C21C7/06C21C7/064C22B9/04
    • C21C7/0006C21C7/0056C22B9/04
    • The disclosed method is a method of manufacturing clean steel comprising refining molten steel by adding additives of from not more than 0.5% to more than 0.001% by weight of molten steel to the molten steel bath, in vacuo or a non-oxidizing atmosphere within a melting furnace or vessel made of or lined with a basic refractory material consisting essentially of 7-90 wt % of CaO and 90-7 wt % of MgO, which total content being 70% to 99.9%, and optionally included a basic refractory material consisting of 30-0.1 wt % of at least one element selected from the group consisting of Al.sub.2 O.sub.3, CrO, ZrO.sub.2.SiO.sub.2, ZrO.sub.2, ZrC and C as selected components, and obtaining clean steel containing less than 30 ppm of oxygen, less than 30 ppm of sulfur, less than 150 ppm of nitrogen, 5 to 0.1 ppm of Mg and 25 to 0.1 ppm of Ca. Said additives comprises Al and at least one optional element selected from Ti, Nb, Ta, B and alkali earth metal. 5% of a solvent can be included to said additives.
    • 所公开的方法是一种制造清洁钢的方法,包括通过在真空或非氧化气氛中向钢水浴中添加不超过0.5重量%至大于0.001重量%的钢水的添加剂来精炼钢水 熔化炉或由碱性耐火材料制成或内衬的基本耐火材料,其基本上由7-90重量%的CaO和90-7重量%的MgO组成,总含量为70-99.9%,并且任选地包括基本耐火材料, 30〜0.1重量%的选自Al2O3,CrO,ZrO2.SiO2,ZrO2,ZrC和C中的至少一种元素作为选择的组分,并获得含有少于30ppm氧的清洁钢,小于30ppm 的硫,小于150ppm的氮,5至0.1ppm的Mg和25至0.1ppm的Ca。 所述添加剂包括Al和选自Ti,Nb,Ta,B和碱土金属的至少一种任选元素。 5%的溶剂可以包含在所述添加剂中。
    • 4. 发明授权
    • Method of producing an iron; cobalt and nickel base alloy having low
contents of sulphur, oxygen and nitrogen
    • 铁的生产方法 钴和镍基合金,含硫量低,氧含量低,氮含量低
    • US4729787A
    • 1988-03-08
    • US937426
    • 1986-12-03
    • Tohei OtotaniToru DegawaKenichi KusumotoMakoto Ebata
    • Tohei OtotaniToru DegawaKenichi KusumotoMakoto Ebata
    • C04B35/057C04B35/06C22B9/00C22B9/04C22B9/10C21C7/02
    • C04B35/06C04B35/057C22B9/006C22B9/04C22B9/10
    • A method of producing an alloy containing at least one major ingredient selected from the group consisting of iron (Fe), cobalt (Co), and Nickel (Ni) and having low contents of sulphur, oxygen, and nitrogen, comprises steps of:(a) holding a molten alloy in a container selected from the group consisting of a lime crucible, a lime crucible furnace, a converter and a ladle lined with a basic refractory consisting of 15-85% of calcium oxide (CaO), and 15-75% of magnesium oxide (MgO), wherein said alloy consists essentially of at least one major ingredient selected from the group consisting of iron (Fe), nickel (Ni), and cobalt (Co);(b) adding at least one additive, based on the molten alloy, into said molten alloy in an atmosphere selected from the group consisting of a non-oxidizing atmosphere and a vacuum, wherein said additive is selected from the group consisting of aluminum (Al), aluminum alloys, silicon and silicon alloys;(c) desulphurizing, deoxidizing and denitrifying said molten alloy under an atmosphere selected from the group consisting of a non-oxidizing atmosphere and a vacuum, whereby the molten alloy contains 0.005 to 7.0% of residual aluminum, 0.0001 to 0.02% of residual calcium, and 0.0005 to 0.03% of residual magnesium; and(d) casting said molten alloy into a mold.
    • 包含选自铁(Fe),钴(Co)和镍(Ni)中的至少一种主要成分并具有低含量的硫,氧和氮的合金的方法包括以下步骤:( a)将熔融合金保持在选自石灰坩埚,石灰坩埚炉,转炉和用15-85%的氧化钙(CaO)组成的碱性耐火材料的浇包中的容器中, 75%的氧化镁(MgO),其中所述合金基本上由选自铁(Fe),镍(Ni)和钴(Co)的至少一种主要成分组成。 (b)在选自非氧化性气氛和真空的气氛中,将至少一种基于所述熔融合金的添加剂加入到所述熔融合金中,其中所述添加剂选自铝(Al ),铝合金,硅和硅合金; (c)在选自非氧化性气氛和真空的气氛下对所述熔融合金进行脱硫,脱氧,脱氮,由此熔融合金含有0.005〜7.0%的残留铝,0.0001〜0.02%的残余钙, 和0.0005〜0.03%的残余镁; 和(d)将所述熔融合金浇铸到模具中。
    • 7. 发明授权
    • Method of producing an iron-, cobalt- and nickel-base alloy having low
contents of sulphur, oxygen and nitrogen
    • 生产含硫,氧,氮含量低的铁,钴,镍基合金的方法
    • US4820485A
    • 1989-04-11
    • US10598
    • 1987-02-03
    • Tohei OtotaniToru DegawaKenichi KusumotoMakoto Ebata
    • Tohei OtotaniToru DegawaKenichi KusumotoMakoto Ebata
    • C04B35/057C04B35/06C22B9/00C22B9/04C22B9/10C21C7/02
    • C04B35/06C04B35/057C22B9/006C22B9/04C22B9/10
    • A method of producing an alloy containing at least one major ingredient selected from the group consisting of iron (Fe), cobalt (Co), and Nickel (Ni) and having low contents of sulphur, oxygen, and nitrogen, comprises steps of:(a) holding a molten alloy in a container selected from the group consisting of a lime crucible, a lime crucible furnace, a converter and a ladle lined with a basic refractory consisting of 15-85% of calcium oxide (CaO), and 15-75% of magnesium oxide (MgO), wherein said alloy consists essentially of at least one major ingredient selected from the group consisting of iron (Fe), nickel (Ni), and cobalt (Co);(b) adding at least one additive, based on the molten alloy, into said molten alloy in an atmosphere selected from the group consisting of a non-oxidizing atmosphere and a vacuum, wherein said additive is selected from the group consisting of aluminum (Al), aluminum alloys, silicon and silicon alloys;(c) desulphurizing, deoxidizing and denitrifying said molten alloy under an atmosphere selected from the group consisting of a non-oxidizing atmosphere and a vacuum, whereby the molten alloy contains 0.005 to 7.0% of residual aluminum, 0.0001 to 0.02% of residual calcium, and 0.0005 to 0.03% of residual magnesium; and(d) casting said molten alloy into a mold.
    • 包含选自铁(Fe),钴(Co)和镍(Ni)中的至少一种主要成分并具有低含量的硫,氧和氮的合金的方法包括以下步骤:( a)将熔融合金保持在选自石灰坩埚,石灰坩埚炉,转炉和用15-85%的氧化钙(CaO)组成的碱性耐火材料的浇包中的容器中, 75%的氧化镁(MgO),其中所述合金基本上由选自铁(Fe),镍(Ni)和钴(Co)的至少一种主要成分组成。 (b)在选自非氧化性气氛和真空的气氛中,将至少一种基于所述熔融合金的添加剂加入到所述熔融合金中,其中所述添加剂选自铝(Al ),铝合金,硅和硅合金; (c)在选自非氧化性气氛和真空的气氛下对所述熔融合金进行脱硫,脱氧,脱氮,由此熔融合金含有0.005〜7.0%的残留铝,0.0001〜0.02%的残余钙, 和0.0005〜0.03%的残余镁; 和(d)将所述熔融合金浇铸到模具中。
    • 10. 发明授权
    • Clean steel
    • 清洁钢
    • US5055018A
    • 1991-10-08
    • US498069
    • 1990-03-23
    • Tohei Ototani
    • Tohei Ototani
    • C21C7/00C22B9/04
    • C21C7/0006C21C7/0056C22B9/04
    • A clean steel consisting essentially of by weight 0.0005%-0.5% of aluminum, 0.0001%-0.5% of silicon, 0.00001%-0.0005% of magnesium, 0.00001%-0.0025% of calcium, 0.00001%-0.003% of oxygen 0.00001%-0.003% of sulfur and 0.0001%-0.015% of nitrogen, less than 2% carbon and the remainder iron, wherein the clean steel is further selected from the group consisting ofcarbon steel consisting of less than 2% of carbon, and common elements of silicon, manganese, phosphorus or sulfur; andalloy steel consisting of general elements and special elements selected from the group consisting of 0.001%-50% of at least nickel, chromium, cobalt or tungsten.
    • 基本上由铝,0.0001%-0.5%的硅,0.00001%-0.0005%的镁,0.00001%-0.0025%的钙,0.00001%-0.003%的氧,0.00001%的重量组成的干净的钢, 0.003%的硫和0.0001%-0.015%的氮,少于2%的碳和剩余的铁,其中清洁钢进一步选自由低于2%的碳组成的碳钢和共同元素 硅,锰,磷或硫; 以及由一般元素和选自至少为镍,铬,钴或钨的0.001%-50%的特殊元素组成的合金钢。