METHOD IN CONNECTION WITH STEEL PRODUCTION
    61.
    发明申请
    METHOD IN CONNECTION WITH STEEL PRODUCTION 有权
    钢铁生产方法

    公开(公告)号:US20100275728A1

    公开(公告)日:2010-11-04

    申请号:US12813444

    申请日:2010-06-10

    IPC分类号: C21C7/04 C22B9/10

    摘要: A method of producing a fluxing agent that can be used in production of steel, preferably stainless steel, employs as a raw material a hydroxide sludge that results from neutralization of metal-contaminated pickling liquid from a pickling step for a steel and contains at least one fluoride-containing compound. The hydroxide sludge is calcined. Steel, preferably stainless steel, is produced by decarburizing a steel heat, whereby a slag is formed on top of the steel heat, and adding a fluxing agent to the slag.

    摘要翻译: 制造可用于生产钢,优选不锈钢的助熔剂的方法采用氢氧化物污泥作为原料,其由金属污染的酸洗液从酸洗步骤中和,并含有至少一种 含氟化合物。 氢氧化物泥浆被煅烧。 通过对钢热进行脱碳来制造优选不锈钢的钢,从而在钢热的顶部形成炉渣,向炉渣添加助熔剂。

    DESULFURIZATION PUCK
    62.
    发明申请
    DESULFURIZATION PUCK 有权
    脱硫机

    公开(公告)号:US20100162853A1

    公开(公告)日:2010-07-01

    申请号:US12720931

    申请日:2010-03-10

    IPC分类号: C21C7/04

    摘要: A method and composition for removing sulfur from molten ferrous material, particularly molten iron. The desulfurization agent includes one or more pucks or briquettes of deoxidizing and/or desulfurization agent. The pucks or briquettes of deoxidizing and/or desulfurization agent include at least one deoxidizing metal and at least one ferrous metal.

    摘要翻译: 一种用于从熔融铁质材料,特别是铁水中除去硫的方法和组合物。 脱硫剂包括脱氧剂和/或脱硫剂的一个或多个圆盘或压块。 脱氧脱硫剂和/或脱硫剂的压块包括至少一种脱氧金属和至少一种含铁金属。

    METHOD FOR PRODUCING HIGH CLEANNESS STEEL EXCELLENT IN FATIGUE STRENGTH OR COLD WORKABILITY
    63.
    发明申请
    METHOD FOR PRODUCING HIGH CLEANNESS STEEL EXCELLENT IN FATIGUE STRENGTH OR COLD WORKABILITY 有权
    用于生产具有疲劳强度或冷加工性能的高纯度钢的方法

    公开(公告)号:US20080202289A1

    公开(公告)日:2008-08-28

    申请号:US12108204

    申请日:2008-04-23

    IPC分类号: C21C7/04

    摘要: The present invention relates to a high-cleanliness steel having a high fatigue strength and high cold workability, and a method of making the high-cleanliness steel. The method adds a Li—Si alloy having a Li content between 20 and 40% and/or Li2CO3 as a Li-containing substance to a molten steel. The Li-containing substance is added to the molten steel after the completion of a series of steps of a ladle refining process including composition adjustment, temperature adjustment and slag refining. The high-cleanliness steel has a total-Li content between 0.020 and 20 ppm by mass and contains 1.0 or below oxide inclusion particle having a major diameter of 20 μm or above at a maximum in 50 g of the steel wire. The steel contains an oxide inclusion that has a CaO content between 15 and 55%, SiO2 content between 20 and 70%, an Al2O3 content of 35% or below, a MgO content of 20% or below and a Li2O content between 0.5 and 20%. The high-cleanliness steel has improved fatigue characteristics and improved cold workability.

    摘要翻译: 本发明涉及具有高疲劳强度和高冷加工性的高清洁度钢以及制造高清洁度钢的方法。 该方法将Li含量为20-40%的Li-Si合金和/或Li 2 CO 3 3作为含Li物质添加到钢水中。 在包括组合物调节,温度调节和炉渣精炼的钢包精炼过程的一系列步骤完成之后,将含Li物质添加到钢水中。 高洁净度钢的总Li含量在0.020〜20ppm质量之间,并且在50g的钢丝中最多含有1.0或更小的直径为20μm以上的氧化物夹杂物。 钢含有CaO含量为15〜55%,SiO 2含量为20〜70%,Al 2 O 3 O 3的氧化物夹杂物, 含量为35%以下,MgO含量为20%以下,Li 2 O 3 O含量为0.5%〜20%。 高清洁度钢具有改善的疲劳特性和改善的冷加工性能。

    Method for producing high cleanness steel excellent in fatigue strength or cold workability
    64.
    发明申请
    Method for producing high cleanness steel excellent in fatigue strength or cold workability 有权
    疲劳强度或冷加工性优异的高洁净度钢的制造方法

    公开(公告)号:US20060156864A1

    公开(公告)日:2006-07-20

    申请号:US10564061

    申请日:2004-12-17

    IPC分类号: C21C7/04

    摘要: The present invention relates to a high-cleanliness steel having a high fatigue strength and high cold workability, and a method of making the high-cleanliness steel. The method adds a Li—Si alloy having a Li content between 20 and 40% and/or Li2CO3 as a Li-containing substance to a molten steel. The Li-containing substance is added to the molten steel after the completion of a series of steps of a ladle refining process including composition adjustment, temperature adjustment and slag refining. The high-cleanliness steel has a total-Li content between 0.020 and 20 ppm by mass and contains 1.0 or below oxide inclusion particle having a major diameter of 20 μm or above at a maximum in 50 g of the steel wire. The steel contains an oxide inclusion that has a CaO content between 15 and 55%, SiO2 content between 20 and 70%, an Al2O3 content of 35% or below, a MgO content of 20% or below and a Li2O content between 0.5 and 20%. The high-cleanliness steel has improved fatigue characteristics and improved cold workability.

    摘要翻译: 本发明涉及具有高疲劳强度和高冷加工性的高清洁度钢以及制造高清洁度钢的方法。 该方法将Li含量为20-40%的Li-Si合金和/或Li 2 CO 3 3作为含Li物质添加到钢水中。 在包括组合物调节,温度调节和炉渣精炼的钢包精炼过程的一系列步骤完成之后,将含Li物质添加到钢水中。 高洁净度钢的总Li含量在0.020〜20ppm质量之间,并且在50g的钢丝中最多含有1.0或更小的直径为20μm以上的氧化物夹杂物。 钢含有CaO含量为15〜55%,SiO 2含量为20〜70%,Al 2 O 3 O 3的氧化物夹杂物, 含量为35%以下,MgO含量为20%以下,Li 2 O 3 O含量为0.5%〜20%。 高清洁度钢具有改善的疲劳特性和改善的冷加工性能。

    Method for manufacturing steel plate having superior toughness in weld heat-affected zone
    65.
    发明申请
    Method for manufacturing steel plate having superior toughness in weld heat-affected zone 有权
    焊接热影响区具有优异韧性的钢板制造方法

    公开(公告)号:US20050173030A1

    公开(公告)日:2005-08-11

    申请号:US11105795

    申请日:2005-04-14

    摘要: A welding structural steel product exhibiting a superior heat affected zone toughness, comprising, in terms of percent by weight, 0.03 to 0.17% C, 0.01 to 0.5% Si, 0.4 to 2.0% Mn, 0.005 to 0.2% Ti, 0.0005 to 0.1% Al, 0.008 to 0.030% N, 0.0003 to 0.01% B, 0.001 to 0.2% W, at most 0.03% P, at most 0.03% S, at most 0.005% O, and balance Fe and incidental impurities while satisfying conditions of 1.2≦Ti/N≦2.5, 10≦N/B≦40, 2.5≦Al/N≦7, and 6.5≦(Ti+2Al+4B)/N≦14, and having a microstructure essentially consisting of a complex structure of ferrite and pearlite having a grain size of 20 μm or less. The method includes the steps of preparing a slab of the above-described composition, heating the slab to 1,100° C. to 1,250° C. for 60-180 minutes, hot rolling the heated slab in an austenite recrystallization range at a 40% or more rolling reduction followed by controlled cooling.

    摘要翻译: 表现出优异的热影响区韧性的焊接结构钢产品,以重量%计含有0.03〜0.17%的C,0.01〜0.5%的Si,0.4〜2.0%的Mn,0.005〜0.2%的Ti,0.0005〜0.1% Al,0.008〜0.030%N,0.0003〜0.01%B,0.001〜0.2%W,0.03%以下P,0.03%以下S,0.005%以下O,余量Fe及杂质, = Ti / N <=2.5,10≤N/B≤40,2.5≤Al/N≤7和6.5 <=(Ti + 2Al + 4B)/N≤14,并且具有微观结构 由粒径为20μm以下的铁素体和珠光体的复合结构构成。 该方法包括以下步骤:制备上述组合物的板坯,将板坯加热至1100℃至1250℃,持续60-180分钟,在奥氏体重结晶范围内以40%的速度热轧加热的板坯,或 更多的轧制减少,然后控制冷却。

    Vacuum refining method for molten steel
    67.
    发明授权
    Vacuum refining method for molten steel 失效
    钢水真空精炼法

    公开(公告)号:US5902374A

    公开(公告)日:1999-05-11

    申请号:US817269

    申请日:1997-03-28

    IPC分类号: C21C7/00 C21C7/04 C21C7/10

    CPC分类号: C21C7/0006 C21C7/04 C21C7/10

    摘要: The present invention relates to a molten steel refining method for refining molten steel, the carbon content of which is not more than 0.1 weight %, by blowing oxygen gas for decarburization at a blowing speed so that a cavity, the depth of which is 150 to 400 mm, can be formed on the surface of molten steel in a straight barrel type vacuum refining apparatus in which a straight barrel type vacuum vessel having no vessel bottom and a ladle are arranged. When necessary, the above decarburizing processing conducted by blowing oxygen gas is combined with: an Al heating process in which Al added into the vacuum vessel is burned by oxygen gas blown into the vacuum vessel at a blowing speed such that the cavity depth can be 50 to 400 mm; a degassing treatment conducted in a high vacuum condition; a desulfurizing treatment in which a desulfurizing agent is blown into the vacuum vessel; or a burner heating treatment in which a combustion improving agent is blown together with oxygen gas, wherein each treatment except for the high vacuum degassing treatment is conducted in a degree of vacuum of 100 to 400 Torr.

    摘要翻译: PCT No.PCT / JP96 / 02173 Sec。 371日期1997年3月28日 102(e)1997年3月28日PCT PCT 1996年8月6日PCT公布。 第WO97 / 05291号公报 日期:1997年2月13日本发明涉及一种用于精炼钢水的钢水精炼方法,其中碳含量不超过0.1重量%,通过以吹制速度吹入用于脱碳的氧气,使得腔体的深度 可以在直筒型真空精炼装置中在钢水表面上形成150-400mm,其中设置有没有容器底部和钢包的直筒型真空容器。 必要时,将通过吹入氧气进行的上述脱碳处理与以下方式组合:Al加热过程,其中,通过以鼓风速度吹入真空容器中的氧气将Al添加到真空容器中,使得腔深度可以为50 至400毫米; 在高真空条件下进行脱气处理; 将脱硫剂吹入真空容器内的脱硫处理; 或燃烧改善剂与氧气一起吹送的燃烧器加热处理,除了高真空脱气处理以外的各处理是在真空度为100〜400托的范围内进行的。

    Direct use of sulfur-bearing nickel concentrate in making Ni alloyed
stainless steel
    69.
    发明授权
    Direct use of sulfur-bearing nickel concentrate in making Ni alloyed stainless steel 失效
    直接使用含硫镍精矿制造Ni合金不锈钢

    公开(公告)号:US5575829A

    公开(公告)日:1996-11-19

    申请号:US470308

    申请日:1995-06-06

    申请人: David M. Kundrat

    发明人: David M. Kundrat

    摘要: A process for obtaining Ni units from sulfur-bearing nickel concentrate during refining a nickel-alloyed steel or a stainless steel. Sulfur of the concentrate is transferred to and held within the slag by controlling slag composition and temperature, degree of mixing of the slag with the bath by an inert gas and aluminum level in the bath. The extent of desulfurization by the slag, the slag weight and the steel sulfur specification determine the amount of concentrate that can be added to the bath. The ratio of the slag weight to the iron bath weight should be in the range of 0.10-0.30 and the bath temperature is maintained between 1550.degree.-1700.degree. C. The slag basicity is controlled between 1.0 and 3.5, the composition of Al.sub.2 O.sub.3 in the slag is maintained between 15-25 wt. % and the composition of MgO is maintained between 12-20 wt. %.

    摘要翻译: 在镍合金钢或不锈钢精炼期间从含硫镍精矿获得Ni单元的方法。 通过控制炉渣组成和温度,炉渣与浴中的惰性气体和铝液在浴中的混合程度,将浓缩物中的硫转移并保持在炉渣内。 渣的脱硫程度,渣重和钢硫规格决定了可加入浴中的浓缩物的量。 炉渣重量与铁浴浴重量的比值应在0.10-0.30范围内,浴温保持在1550〜-1700℃之间。炉渣碱度控制在1.0〜3.5之间,Al2O3在 炉渣保持在15-25wt。 %,MgO的组成保持在12-20wt。 %。

    Liquid steel bath reheating method
    70.
    发明授权
    Liquid steel bath reheating method 失效
    液钢浴再加热法

    公开(公告)号:US5316566A

    公开(公告)日:1994-05-31

    申请号:US949820

    申请日:1992-12-10

    申请人: Jacques Defays

    发明人: Jacques Defays

    CPC分类号: C21C7/005

    摘要: A method for metallothermally reheating a liquid steel bath in a metallurgical container into which a metal fuel is placed and oxidizing and agitating gases are injected under its surface. A controllable flow resulting from the injection of agitating gas is generated in the bath by means of a device which is separate from the oxidizing gas injection device, and the metal fuel is inserted into said flow so that it comes into contact with said oxidizing gas.

    摘要翻译: PCT No.PCT / BE91 / 00044 Sec。 371日期:1992年12月10日 102(e)日期1992年12月10日PCT提交1991年6月28日PCT公布。 公开号WO92 / 00391 日期:1992年1月9日。一种在冶金容器中金属热还原再加热金属燃料的方法,其中放置金属燃料,氧化和搅拌气体在其表面下注入。 通过与氧化气体注入装置分离的装置在浴中产生由喷射搅拌气体产生的可控流,并且将金属燃料插入所述流中,使其与所述氧化气体接触。