公开(公告)号：US10526686B2

公开(公告)日：2020-01-07

申请号：US14783698

申请日：2014-04-24

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Michimasa Aono ,  Kenichiro Miyamoto ,  Masanobu Suzuki

IPC分类号： C22C38/38 ,  C22C38/00 ,  C22C38/06 ,  C22C38/60 ,  C22C38/02 ,  C22C38/22 ,  C22C38/34 ,  C22C38/08 ,  C21C7/04 ,  C21C7/06 ,  C22C38/04

摘要： Low-oxygen clean steel is provided containing C, Si, Mn, P, and S as chemical components, and further containing, by mass %, 0.005% to 0.20% of Al, greater than 0% to 0.0005% of Ca, 0.00005% to 0.0004% of REM, and greater than 0% to 0.003% of T.O, wherein the REM content, the Ca content, and the T.O content satisfy 0.15≤REM/Ca≤4.00 and Ca/T.O≤0.50, nonmetallic inclusions which have a maximum predicted diameter of 1 μm to 30 μm measured using an extreme value statistical method under the condition in which a prediction area is 30,000 mm2, and contain Al2O3 and REM oxide are dispersed in the steel, an average proportion of the Al2O3 in the nonmetallic inclusions is greater than 50%, the REM is one or two or more of rare-earth elements La, Ce, Pr, and Nd, and the steel is Al-deoxidized steel or Al—Si-deoxidized steel.

公开(公告)号：US10371261B2

公开(公告)日：2019-08-06

申请号：US15305108

申请日：2015-03-16

申请人： NIPPON STEEL NISSHIN CO., LTD.

发明人： Hiroyasu Matsubayashi ,  Sadayuki Nakamura ,  Junichi Katsuki ,  Ryoji Hirota

IPC分类号： C22C38/00 ,  F16J15/08 ,  C21D9/46 ,  C22C38/58 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C23G1/02 ,  C21D6/00 ,  C21C7/06

摘要： Provided is a martensitic stainless-steel sheet having a reduced anisotropy in workability and fatigue resistance which are attributable to oxide based inclusions. A martensitic stainless-steel sheet which has a steel composition that contains, in terms of mass %, 0.030 to 0.300% C, 0.20 to 2.50% Si, 0.15 to 4.00% Mn, 0.01 to 1.00% Ni, 11.00 to 15.00% Cr, 0.001 to 0.100% N, 0.0001 to 0.0350% Al, 0 to 0.50% V, 0 to 0.50% Nb, 0 to 0.50% Ti, 0 to 0.020% B, and a balance of Fe and unavoidable impurities, and that has a value of γmax, determined by the following equation (1), of 80.0 or greater, and in which oxide based inclusions are observed in the metallographic structure, the oxide based inclusions having a converted composition comprising up to 30 mass % or less Al2O3, 20 to 60 mass % SiO2, and 15 to 70 mass % MnO.

公开(公告)号：US10350676B2

公开(公告)日：2019-07-16

申请号：US14785815

申请日：2013-04-23

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Masafumi Miyazaki ,  Hideaki Yamamura ,  Masayuki Hashimura ,  Takashi Fujita

IPC分类号： C21C7/00 ,  B22D11/11 ,  C22C38/26 ,  C22C38/24 ,  C21C7/06 ,  C22C38/00 ,  C22C38/58 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/40 ,  C21C7/10 ,  C21D8/06 ,  C21D9/02 ,  B22D11/00 ,  B22D11/113 ,  B22D11/114 ,  C21D1/26 ,  C21D6/00 ,  C22C38/02 ,  C22C38/08 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

摘要： A spring steel includes a predetermined chemical composition and a composite inclusion having a maximum diameter of 2 μm or more that TiN is adhered to an inclusion containing REM, O and Al, in which the number of the composite inclusion is 0.004 pieces/mm2 to 10 pieces/mm2, the maximum diameter of the composite inclusion is 40 μm or less, the sum of the number density of an alumina cluster having the maximum diameter of 10 μm or more, MnS having the maximum diameter of 10 μm or more and TiN having the maximum diameter of 1 μm to 10 pieces/mm2.

公开(公告)号：US09708676B2

公开(公告)日：2017-07-18

申请号：US14384981

申请日：2012-03-13

申请人： Fuping Tang ,  Zhen Li ,  Xiaofeng Wang ,  Peng Fei ,  Jinsong Meng ,  Yue Zhang ,  Yong Ma ,  Wenzhong Wang ,  Zhiwen Zhang ,  Xiaoshan Wang ,  Meng Guo ,  Zhigang Zhao ,  Yang Lin ,  Guoqiang Xin ,  Weizhi Yao

发明人： Fuping Tang ,  Zhen Li ,  Xiaofeng Wang ,  Peng Fei ,  Jinsong Meng ,  Yue Zhang ,  Yong Ma ,  Wenzhong Wang ,  Zhiwen Zhang ,  Xiaoshan Wang ,  Meng Guo ,  Zhigang Zhao ,  Yang Lin ,  Guoqiang Xin ,  Weizhi Yao

IPC分类号： C21C1/02 ,  C21C7/06 ,  C21C7/064 ,  C21C7/00 ,  C21C7/10 ,  B22D11/00 ,  C21C5/35 ,  C21C5/36 ,  C21C7/072

CPC分类号： C21C7/064 ,  B22D11/001 ,  C21C1/025 ,  C21C5/35 ,  C21C5/36 ,  C21C7/0043 ,  C21C7/0068 ,  C21C7/0087 ,  C21C7/0645 ,  C21C7/072 ,  C21C7/10 ,  C21C2300/08

摘要： A method for preparing low-cost clean steel includes steps of: preliminarily desulfurizing iron melt: preliminarily desulfurizing in an iron melt channel during blast furnace tapping and during iron folding in an iron folding room, adding a desulfurizing ball into the iron melt during the blast furnace tapping or the iron folding; dephosphorizing and controlling sulfur: dephosphorizing and controlling sulfur during converter steelmaking, in such a manner that P≦0.014% and S≦0.004% during tapping; rapidly dephosphorizing by slag-forming: rapidly dephosphorizing by slag-forming during converter tapping, at a converter end point, controlling a C content at 0.02˜0.10%, adding a dephosphorizing ball through an alloy chute during the converter tapping, blowing argon and stirring at the same time; purifying steel melt during RH refining: adding a purifying ball at a late stage of the RH refining when a vacuum degree is at 66.7˜500 Pa; and continuously casting with whole-process protection.

公开(公告)号：US20170044633A1

公开(公告)日：2017-02-16

申请号：US15304540

申请日：2015-04-22

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Masayuki HASHIMURA ,  Junya YAMAMOTO ,  Kazumi MIZUKAMI ,  Naotsugu YOSHIDA ,  Masafumi MIYAZAKI ,  Kenichiro MIYAMOTO

IPC分类号： C21D9/02 ,  C22C38/50 ,  C22C38/46 ,  C22C38/42 ,  C22C38/34 ,  C22C38/32 ,  C22C38/28 ,  C22C38/26 ,  C22C38/24 ,  C22C38/22 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21C7/06 ,  B22D11/00 ,  C22C38/54

CPC分类号： C21D9/02 ,  B22D11/001 ,  B22D11/115 ,  B22D11/124 ,  C21C7/04 ,  C21C7/06 ,  C21C7/10 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/42 ,  C22C38/46 ,  C22C38/50 ,  C22C38/54 ,  C22C38/60

摘要： A spring steel according to the present embodiment has a chemical composition consisting of, in mass %, C: 0.4 to 0.7%, Si: 1.1 to 3.0%, Mn: 0.3 to 1.5%, P: 0.03% or less, S: 0.05% or less, Al: 0.01 to 0.05%, rare earth metal: 0.0001 to 0.002%, N: 0.015%, O or less: 0.0030% or less, Ti: 0.02 to 0.1%, with the balance being Fe and impurities. In the spring steel, the number of oxide inclusions having an equivalent circular diameter of equal to or greater than 5 μm is equal to or less than 0.2/mm2, the oxide inclusions each being one of an Al-based oxide, a complex oxide containing REM, O and Al, and a complex oxysulfide containing REM, O, S, and Al. Further, a maximum value among equivalent circular diameters of the oxide inclusions is equal to or less than 40 μm.

摘要翻译： 根据本实施方式的弹簧钢具有以质量％计含有C：0.4〜0.7％，Si：1.1〜3.0％，Mn：0.3〜1.5％，P：0.03％以下，S：0.05的化学组成 ％以下，Al：0.01〜0.05％，稀土金属：0.0001〜0.002％，N：0.015％，○以下：0.0030％以下，Ti：0.02〜0.1％，余量为Fe和杂质。 在弹簧钢中，具有等于或大于5μm的等效圆直径的氧化物夹杂物的数量等于或小于0.2 / mm2，所述氧化物夹杂物分别为Al基氧化物，含有 REM，O和Al，以及含有REM，O，S和Al的复合氧硫化物。 此外，氧化物夹杂物的当量圆直径的最大值等于或小于40μm。

公开(公告)号：US09499878B2

公开(公告)日：2016-11-22

申请号：US14289960

申请日：2014-05-29

申请人： Pierre Vayda

发明人： Pierre Vayda

IPC分类号： C21B13/00 ,  C22B1/245 ,  C01F5/24 ,  C22B9/10 ,  C22B1/242 ,  C10L5/04 ,  C10L5/10 ,  C21B5/04 ,  C21C5/52 ,  C21C5/54 ,  C21C7/00 ,  C21C7/06

CPC分类号： C22B9/103 ,  C10L5/04 ,  C10L5/10 ,  C21B5/04 ,  C21B13/0066 ,  C21B13/008 ,  C21C5/527 ,  C21C5/54 ,  C21C7/0025 ,  C21C7/06 ,  C21C2007/0062 ,  C22B1/242 ,  C22B1/245 ,  Y02P10/216

摘要： A briquette for addition to the charge in a steelmaking or ironmaking furnace comprises a quantity of carbon fines, a material in powdered form, the material selected from the group consisting of iron powder and iron oxide, the material densifying the briquette and suppressing the slippery nature of the carbon fines, a quantity of magnesium carbonate, and a binder.

摘要翻译： 在炼钢或炼铁炉中加入的煤块包含一定数量的碳粉，粉末形式的材料，选自铁粉和氧化铁的材料，该材料致密化团块并抑制滑动性 的碳细粉，一定量的碳酸镁和粘合剂。

公开(公告)号：US20160130674A1

公开(公告)日：2016-05-12

申请号：US14967520

申请日：2015-12-14

申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel. Ltd.)

发明人： Tomoko SUGIMURA ,  Koichi Sakamoto

IPC分类号： C21C7/06 ,  C22C38/34 ,  C22C38/24 ,  C22C38/14 ,  C22C38/12 ,  C22C38/26 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/46 ,  C22C38/30

CPC分类号： C21C7/06 ,  C21C7/04 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/24 ,  C22C38/26 ,  C22C38/30 ,  C22C38/34 ,  C22C38/46

摘要： A Si-killed steel wire rod for obtaining a spring excellent in fatigue properties and a spring excellent in fatigue properties obtained from such steel wire rod are provided. In the Si-killed steel wire rod of the present invention, oxide-based inclusions present in the wire rod contain SiO2: 30-90%, Al2O3: 2-35%, MgO: 35% or below (not inclusive of 0%), CaO: 50% or below (not inclusive of 0%), MnO: 20% or below (not inclusive of 0%) and BaO: 0.2-20% respectively, and total content of (CaO+MgO) is 3% or above.

摘要翻译： 提供一种用于获得疲劳特性优异的弹簧和由这种钢线棒获得的疲劳特性优异的弹簧的Si镇静钢线材。 在本发明的Si镇静钢线材中，线材中存在的氧化物系夹杂物含有SiO 2：30〜90％，Al 2 O 3：2-35％，MgO：35％以下（不包括0％） ，CaO：50％以下（不包括0％），MnO：20％以下（不包括0％）和BaO：0.2〜20％，（CaO + MgO）的总含量为3％ 以上。

公开(公告)号：US09187793B2

公开(公告)日：2015-11-17

申请号：US13881434

申请日：2010-12-31

申请人： Anatoly Alexeevich Kuznetsov ,  Arkady Moissevich Peker ,  Alexey Alexandrovich Kupriyanov ,  Sergey Ivanovich Nikitin ,  Ignor Semenovich Lerner

发明人： Anatoly Alexeevich Kuznetsov ,  Arkady Moissevich Peker ,  Alexey Alexandrovich Kupriyanov ,  Sergey Ivanovich Nikitin ,  Ignor Semenovich Lerner

IPC分类号： C21C7/076 ,  C21C5/28 ,  C21C5/52 ,  C21C5/56 ,  C22C33/04 ,  C22C38/04 ,  C22C38/06 ,  C22C38/02 ,  C22C38/42 ,  C22C38/50 ,  C21C7/00 ,  C21C7/06

CPC分类号： C21C7/00 ,  C21C5/28 ,  C21C5/5264 ,  C21C5/562 ,  C21C7/0006 ,  C21C7/0075 ,  C21C7/06 ,  C21C7/076 ,  C21C2300/08 ,  C22C33/04 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/50 ,  Y02P10/216 ,  Y02W30/54

摘要： A process for making desired low (LH) hardenability steels in an electric arc or, induction furnace, which is loaded with metal charge consisting of iron, carbon, alloy, scrap with a specified maximum content of manganese, silicon, chrome, nickel and copper, providing for the final content of each of them of not more than 0.1 weight % followed by carburization in a ladle or ladle furnace, the melt then deoxidized in the ladle or ladle furnace with aluminum (1.0-2.3 kg/t), titanium or vanadium in order to achieve the desired low hardenability DI. The invention makes it possible to obtain better mechanical properties and stable hardenability characterized by the particular desired DI.

摘要翻译： 一种用于在电弧中制造所需低（LH）淬透性钢的方法或感应炉，其中负载由铁，碳，合金，具有规定的最大含量的锰，硅，铬，镍和铜的铁， 提供其中每个的最终含量不超过0.1重量％，然后在钢包或钢包炉中渗碳，然后熔化物在钢包或钢包炉中用铝（1.0-2.3kg / t）脱氧，钛或 钒以达到期望的低淬透性DI。 本发明使得可以获得更好的机械性能和由特定期望的DI表征的稳定的淬透性。

公开(公告)号：US09187792B2

公开(公告)日：2015-11-17

申请号：US13978963

申请日：2012-01-11

申请人： Mechthilde Döring-Freissmuth

发明人： Mechthilde Döring-Freissmuth

IPC分类号： C21C1/00 ,  C21C7/06 ,  C21C1/02 ,  C21C7/064

CPC分类号： C21C1/025 ,  C21C7/0645

摘要： The invention relates an agent for treating molten metals, in particular for dephosphorizing pig iron melts, containing at least calcium oxide, optionally at least one other element in the elementary and/or bound state, selected from the group including alkali metals, alkaline earth metals or earth metals and bitumes in an amount between 1-30 wt.-% or a mineral oil and/or paraffin oil, in an amount between 1-25 wt. %. The agent is suitable, in particular, for treating pig iron melts, according to a mono-, co- or multi-injection method, but also for stirring, for example, according to the KR stirring method.

摘要翻译： 本发明涉及用于处理熔融金属的试剂，特别是用于使生铁熔体脱磷，至少含有氧化钙，至少含有至少一种元素和/或结合态的其它元素，其选自包括碱金属，碱土金属 或土壤金属和沥青，其含量为1-30重量％，或矿物油和/或石蜡油，其量为1-25重量％ ％。 该试剂特别适用于根据单次，共同或多次注射方法处理生铁熔体，但也适用于例如根据KR搅拌方法的搅拌。

公开(公告)号：US08882880B2

公开(公告)日：2014-11-11

申请号：US13697777

申请日：2011-04-12

申请人： Feng Zhang ,  Xiao Chen ,  Jianru Zhu

发明人： Feng Zhang ,  Xiao Chen ,  Jianru Zhu

IPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/00 ,  C22C38/14 ,  C22C38/06 ,  C21C7/06 ,  C21C7/00 ,  C21C7/064 ,  C22C38/12 ,  C21C7/076 ,  C22C33/04 ,  C21B13/02

CPC分类号： C22C38/04 ,  C21B13/02 ,  C21C7/06 ,  C21C7/0645 ,  C21C7/076 ,  C22C33/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  Y02P10/242

摘要： The present invention provides a method for controlling extremely low Ti in extra low carbon AlSi-killed steel, the weight percentage of the chemical composition of the extra low carbon AlSi-killed steel comprising: C≦0.005%, Si: 0.1-3.4%, Mn: 0.1-0.5%, P≦0.2%, S≦0.002%, Al: 0-1.2%, N≦0.005%, Ti≦0.0015 and a balance substantially being Fe and inevitable impurities; the liquid steel having said chemical composition is obtained by hot metal preprocessing, smelting, retained RH smelting and ingoting, wherein the top ladle slag is modified, and calcium-aluminum based modifier of 0.6-1.7 kg/t steel are added, so as to ensure a controlling demand that when refined RH decarburization is over, the content of T.Fe in top ladle slag composition ≧5%, the content of Al2O3≦23%; when refined RH decarburization is over, ferrosilicon, ferroaluminum or ferromanganese is employed to perform deoxide and alloying, then perform a deep desulfurization, and desulfurizing efficiency is 50% to 70%.

摘要翻译： 本发明提供了一种用于控制超低碳AlSi-镇静钢中极低Ti值的方法，该超低碳AlSi-镇静钢的化学成分的重量百分比包括：C n N; 0.005％，Si：0.1-3.4％ Mn：0.1-0.5％，P＆NlE; 0.2％，S＆NlE; 0.002％，Al：0-1.2％，N＆lt; lE; 0.005％，Ti＆NlE; 0.0015，余量基本上为Fe和不可避免的杂质; 具有所述化学组成的液态钢通过热金属预处理，熔炼，保留的RH熔炼和铸造得到，其中顶部钢包渣被改性，并且加入0.6-1.7kg / t钢的钙 - 铝基改性剂，以便 确保控制需求，当精炼RH脱碳结束时，顶部钢包渣组成中的T.Fe含量≥5％，Al2O3和NlE含量23％; 当精炼RH脱碳结束时，采用硅铁，铁铝或锰铁进行脱氧和合金化，进行深度脱硫，脱硫效率为50％〜70％。