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91. 发明公开

KR1020130111392A 수소 유도 균열 내성이 우수한 강판 및 그 제조 방법 有权
标题翻译：具有优异氢诱导抗裂性的钢板及其制造方法
公开(公告)号：KR1020130111392A
公开(公告)日：2013-10-10
申请号：KR1020130033318
申请日：2013-03-28
申请人： 가부시키가이샤 고베 세이코쇼
发明人： 가토우다쿠 , 이마무라히로키 , 사토우신스케
IPC分类号： C22C38/00 , C21C7/04 , C22C38/58
CPC分类号： C22C38/26 , C21D6/005 , C21D8/02 , C22B9/00 , C22C33/04 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , Y10T428/12 , C22C38/58
摘要： PURPOSE: A steel sheet and a manufacturing method thereof are provided to easily manufacture a steel sheet having an adequate hydrogen-induced crack resistance. CONSTITUTION: A steel sheet includes 0.02 to 0.20 mass% of C, 0.02 to 0.50 mass% of Si, 0.6 to 2.0 mass% of Mn, 0.030 mass% or less of P, 0.004 mass% or less of S, 0.010 to 0.08 mass% of Al, 0.001 to 0.01 mass% of N, 0.002 to 0.06 mass% of Nb, 0.0003 to 0.0060 mass% of Ca, 0.0040 mass% or less of O, 0.0002 to 0.05 mass% of REM, 0.0003 to 0.020 mass% of Zr, and the remaining amount of Fe and inevitable impurities. In the composition of inclusions with widths above 1 μm in steel for the steel sheet, a mass ratio (RES/CaS) between an REM sulfide (RES) and a Ca sulfide (CaS) is above 0.05, the amount of Zr is 5 to 60 mass%, and the amount of Nb is 5 mass% or less. [Reference numerals] (AA) Inclusion; (BB,EE) Width; (CC,DD) Maximum projection length
摘要翻译：目的：提供钢板及其制造方法，以容易地制造具有足够的氢诱发抗裂性的钢板。构成：钢板包括C：0.02〜0.20质量％，Si：0.02〜0.50质量％，Mn：0.6〜2.0质量％，P：0.030质量％以下，S：0.004质量％以下，S：0.010〜0.08质量％的Al，0.001〜0.01质量％的Nb，0.002〜0.06质量％的Nb，0.0003〜0.0060质量％的Ca，0.0040质量％以下的O，0.0002〜0.05质量％的REM，0.0003〜0.020质量％ Zr，剩余量的Fe和不可避免的杂质。在钢板中钢的宽度大于1μm的夹杂物的组成中，REM硫化物（RES）和硫化钙（CaS）之间的质量比（RES / CaS）大于0.05，Zr的量为5〜 60质量％，Nb的量为5质量％以下。（附图标记）（AA）包含; （BB，EE）宽度; （CC，DD）最大投影长度

92. 发明公开

KR1020130047135A 용강의 정련 방법 및 이를 이용한 쾌삭강의 제조 방법 有权
标题翻译：精炼热金属的方法及使用其制造自由切割钢的方法
公开(公告)号：KR1020130047135A
公开(公告)日：2013-05-08
申请号：KR1020110111971
申请日：2011-10-31
申请人： 주식회사 포스코
发明人： 이동렬 , 박진홍 , 김용태
IPC分类号： C21C7/10 , C21C7/04
CPC分类号： C21C7/10 , B22D11/113 , C21C7/0025 , C21C7/072 , C21C2300/04
摘要： PURPOSE: A method for refining molten steel and a method for manufacturing free-cutting steel using the same are provided to insert a re-carburizer in an RH(Reinstahl Huten Werke Heraus) step, thereby minimizing decarburization and deoxidation due to the reaction between carbon and oxygen. CONSTITUTION: A method for refining molten steel includes: a step of preparing the molten steel; a step(S210) of dehydrogenating the molten steel using an RH(Reinstahl Huten Werke Heraus); and a step(S220) of feeding a re-carburizer inside the molten steel when the pressure inside the RH is maintained between 50 and 150 torrs. In the step(S210), the pressure inside the RH is maintained at 2 torrs or less, and inert gas is fed into the RH. In the step(S220), the number of times for feeding the total desired amount of the re-carburizer is multiple. [Reference numerals] (AA) Start; (BB) End; (S210) Dehydrogenation; (S220) Re-carburizer input under a pressure of 50-150 torr and carbon(C) concentration control
摘要翻译：目的：提供一种精炼钢水的方法和使用该方法制造切削钢的方法，以在RH（Reinstahl Huten Werke Heraus）步骤中插入再渗碳剂，由此最小化由碳之间的反应引起的脱碳和脱氧和氧气。构成：用于精炼钢水的方法包括：制备钢水的步骤; 使用RH（Reinstahl Huten Werke Heraus）使钢水脱氢的工序（S210）; 以及当RH内的压力保持在50〜150托之间时，在钢水内供给再渗碳器的工序（S220）。在步骤（S210）中，RH内的压力维持在2乇以下，惰性气体供给RH。在步骤（S220）中，供给总期望量的再渗碳器的次数是多次。（附图标记）（AA）开始; （BB）结束; （S210）脱氢; （S220）在50-150托的压力和碳（C）浓度控制下的再渗碳输入

93. 发明授权

KR101259374B1 고청청 베어링강의 제조방법 有权
标题翻译：高洁净轴承钢制造方法
公开(公告)号：KR101259374B1
公开(公告)日：2013-04-30
申请号：KR1020070141467
申请日：2007-12-31
申请人： 주식회사 포스코
发明人： 박진홍 , 구경회 , 민중기
IPC分类号： C21C7/00 , C21C7/04 , C21C5/28 , C22C1/02
摘要： 본 발명은 중량퍼센트 C:0.95~1.10%, Si:0.15~0.35%, Mn: 0.50% 이하, P: 0.025 이하, S: 0.025 이하, Cr: 1.30~1.60% 나머지 Fe로 조성된 강인 고청정 베어링강을 제조하는데 있어서 전로 출강중 탈산제 및 부원료를 투입하고 LF 공정중 부원료를 투입하여 염기도 CaO/SiO
2
5~10, CaO/Al
2 O
3 를 1.5~2.0로 슬래그의 조성을 제어하는 단계와, RF 공정 중 황을 상향 조정함으로써 재산화를 방지하는 단계를 포함하는 고청정 베어링강의 제조방법을 제공한다.
베어링강, 슬래그 정련, 탈가스, 재산화

94. 发明授权

KR101255064B1 제강용 첨가제의 제조 방법 및 제강 공정용 첨가제 有权
标题翻译：制造钢铁添加剂的方法和炼钢用添加剂
公开(公告)号：KR101255064B1
公开(公告)日：2013-04-17
申请号：KR1020100115808
申请日：2010-11-19
申请人： 주식회사 포스코
发明人： 윤원규 , 홍재근 , 최인섭
IPC分类号： C22B1/16 , C21C7/04
摘要： 본 발명은 HBI(Hot Briquetted Iron) 제조 과정에서 발생되는 HBI 분말을 활용하는 제강용 첨가제의 제조 방법 및 제강 공정용 첨가제에 관한 것으로서, 특히, 본 발명의 일실시예에 따른 제강용 첨가제의 제조 방법은 제강 공정에 사용되는 첨가제를 제조하는 방법으로서, HBI(Hot Briquetted Iron) 제조 과정에서 발생되는 HBI 분말을 수거하는 단계와; 수거된 HBI 분말을 건조하는 단계와; 건조된 HBI 분말에 바인더를 혼합하는 단계와; 바인더와 혼합된 HBI 분말을 괴상으로 성형하는 단계와; 괴상으로 성형된 HBI를 건조하는 단계를 포함한다.

95. 发明公开

KR1020130025383A 초저 탄소 AlSi-킬드 강에서 Ti를 극히 낮게 제어하는 방법 有权
标题翻译：用于控制超低碳钢的钛含量的方法
公开(公告)号：KR1020130025383A
公开(公告)日：2013-03-11
申请号：KR1020127027615
申请日：2011-04-12
申请人： 바오샨 아이론 앤 스틸 유한공사
发明人： 장펑 , 천샤오 , 주지안루
IPC分类号： C21C5/54 , C21C7/04 , C21C7/10 , C22C33/04
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%, A1: 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 0.6-1.7kg/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 Al 2 O‰¤23%; when refined RH decarburization is over, ferrosilicium, ferroaluminum or ferromanganese is employed to perform deoxide and alloying, then perform a deep desulfurization, and desulfurizing efficiency is 50% to 70%.

96. 发明公开

KR1020130019659A 고청정 스테인리스강의 정련 방법 有权
标题翻译：高纯度不锈钢精炼方法
公开(公告)号：KR1020130019659A
公开(公告)日：2013-02-27
申请号：KR1020110081753
申请日：2011-08-17
申请人： 주식회사 포스코
发明人： 신충용 , 김영식
IPC分类号： C21C7/00 , C21C7/04
CPC分类号： C21C7/064 , C21C5/005 , C21C7/0087
摘要： PURPOSE: A refining method for high purity stainless steel is provided to secure desulfurization reaction as well as to suppress generation of a high melting point slag, thereby reducing defects on a product surface and producing high purity steel. CONSTITUTION: A refining method for high purity stainless steel includes the following steps: a step of firstly refining molten steel in an AOD puddling furnace; a step of firstly tapping the molten steel; a step of removing a slag formed on the top of the firstly tapped molten steel; a step of secondly refining the molten steel from which the slag is removed; and a step of secondly tapping the molten steel. In the first tapping step of the molten steel, tapping temperature is controlled and in the second refining step, the amount of Si oxidation and the amount of CaO injection are controlled. The tapping temperature in the first tapping step of the molten steel is 1600°C - 1670°C.The amount of Si oxidation in the second refining step is 0.55%-0.75%, which is high purity. The final target basicity of the slag in the second refining step is 1.0-1.3. The amount of CaO injection in the second refining step is determined in consideration of the basicity of 0.7-1.0. [Reference numerals] (AA) Firstly refining in a refining furnace; (BB) Firstly tapping molten steel; (CC) Removing slag; (DD) Secondly refining in the refining furnace; (EE) Secondly tapping molten steel; (FF) Continuous casting
摘要翻译：目的：提供高纯度不锈钢的精炼方法，以确保脱硫反应，抑制高熔点渣的产生，从而减少产品表面的缺陷并生产高纯度钢。构成：高纯度不锈钢的精炼方法包括以下步骤：首先在AOD搅拌炉中精炼钢水的步骤; 首先挖出钢水的步骤; 除去形成在第一抽头钢水顶部的炉渣的步骤; 二次精炼除去渣的钢水的工序; 以及二次利用钢水的步骤。在钢水的第一攻丝步骤中，控制出料温度，在第二精炼步骤中，控制Si氧化量和CaO注入量。钢水的第一攻丝步骤中的出钢温度为1600℃-1670℃。第二精制步骤中Si氧化的量为0.55％-0.75％，这是高纯度的。第二精炼步骤中炉渣的最终目标碱度为1.0-1.3。考虑碱度为0.7-1.0来确定第二精制步骤中的CaO注入量。（附图标记）（AA）首先在精炼炉中进行精炼; （BB）首先冲出钢水; （CC）除渣; （DD）二次精炼在精炼炉中; （EE）二次自来钢水; （FF）连铸

97. 发明公开

KR1020120132914A 용강 성분 제어용 첨가제 및 용강 성분 제어방법 失效
标题翻译：用于控制钢的成分的添加剂及其方法
公开(公告)号：KR1020120132914A
公开(公告)日：2012-12-10
申请号：KR1020110051313
申请日：2011-05-30
申请人： 현대제철 주식회사
发明人： 김해곤 , 윤인주 , 이계영 , 이성민 , 홍진명
IPC分类号： C21C7/04
CPC分类号： C21C7/04
摘要： PURPOSE: An additive for molten steel component control and a molten steel component control method are provided to reduce waste by utilizing byproducts and to prevent environmental contamination due to the use of fluorite. CONSTITUTION: An additive for molten steel component control comprises quicklime, Al alloy steel, and Mn flux. The Mn flux is a byproduct produced during preparation of Fe-Mn and injected into molten steel with the quicklime and Al alloy steel to improve the fluidity of slag and control the basicity of the molten steel to a predetermined range. The ratio between the sum of Al and Al2O3 contents in the Al alloy steel and CaO content in the quicklime is 1:1.5-2.5. The Mn flux comprises Al2O3, Mn, C, S, CaO, and MgO. [Reference numerals] (AA) Start; (BB) End; (S11) Recovering Mn flux; (S12) Injecting Mn flux, Al alloy metal, and quicklime at predetermined ratio to ladle; (S13) Agitating molten steel
摘要翻译：目的：提供钢水部件控制用添加剂和钢水部件控制方法，通过利用副产物来减少浪费，并防止由于使用萤石而引起的环境污染。构成：用于钢水部件控制的添加剂包括生石灰，Al合金钢和Mn助熔剂。 Mn助熔剂是在制备Fe-Mn时产生的副产物，并且用生石灰和Al合金钢注入钢水中，以改善炉渣的流动性并将钢水的碱度控制在预定范围内。 Al合金钢中Al和Al2O3含量的总和与生石灰中的CaO含量之比为1:1.5-2.5。 Mn通量包括Al2O3，Mn，C，S，CaO和MgO。（附图标记）（AA）开始; （BB）结束; （S11）回收Mn通量; （S12）以预定比例将锰通量，Al合金金属和生石灰注入钢包中; （S13）搅拌钢水

98. 发明公开

KR1020120097044A 래들 퍼니스의 정련 제어방법 有权
标题翻译：用于控制烤炉中精炼的装置及其方法
公开(公告)号：KR1020120097044A
公开(公告)日：2012-09-03
申请号：KR1020110016358
申请日：2011-02-24
申请人： 현대제철 주식회사
发明人： 유대경
IPC分类号： C21C7/04
CPC分类号： C21C7/04 , C21C7/0025 , C21C7/0075
摘要： PURPOSE: An apparatus and a method for controlling refinement in a ladle furnace are provided to reduce operation time by adjusting the carburizing material injection time and power supply time when the fine components in molten steel are adjusted after completion of refinement. CONSTITUTION: An apparatus for controlling refinement in a ladle furnace comprises an electrode rod(120) which heats molten steel in a ladle(101) according to a power supply; a breaker(160) which switches power to the electrod rod on and off from the outside; and a control unit(180) which switches off the breaker to cut off the power supplied to the electrode rod, and switches on the breaker to supply power to the electrode rod when a carburizing material is inserted to the ladle for adjusting the composition of the molten steel. [Reference numerals] (110) Gas supply unit; (140) Carburization material storage unit; (150) Power supply unit; (160) Breaker; (170) Input unit; (180) Control unit
摘要翻译：目的：提供一种用于控制钢包炉精炼的设备和方法，以在精炼完成后调整钢水中的精细成分时，通过调节渗碳材料的喷射时间和供电时间来减少操作时间。构成：用于控制钢包炉中细化的装置包括根据电源对钢包（101）中的钢水进行加热的电极杆（120）; 断开器（160），其从外部开启和关闭所述电极杆的电力; 以及控制单元（180），其断开所述断路器以切断供给到所述电极棒的电力，并且当将渗碳材料插入到所述钢包中时，断开所述断路器以向所述电极棒供电，以调整所述电极棒的组成钢水（附图标记）（110）气体供给单元; （140）渗碳材料储存单元; （150）电源单元; （160）断路器; （170）输入单元; （180）控制单元

99. 发明公开

KR1020120074748A 합금철 투입 제어시스템 无效
标题翻译：控制合金铁注射系统
公开(公告)号：KR1020120074748A
公开(公告)日：2012-07-06
申请号：KR1020100136684
申请日：2010-12-28
申请人： 주식회사 포스코
发明人： 이은신 , 김태수 , 유창근 , 김병일
IPC分类号： C21C7/04
CPC分类号： F27D3/10 , C21C7/0006 , C21C7/04
摘要： PURPOSE: A control system of putting ferro alloy is provided to reduce a steel progress time while the ferro alloy stored in first and second ferro alloy injection units is putted into molten steel in parallel. CONSTITUTION: A control system of putting ferro alloy comprises first and second ferro alloy injection units(100,200) and an operation control unit(300). The first and second ferro alloy injection units respectively store the ferro alloy. The first ferro alloy injection unit comprises one or more ferro alloy injection devices(110) for putting the ferro alloy into molten steel. The operation control unit controls the first and second ferro alloy injection units in parallel such that the ferro alloy is putted into the molten steel in parallel.
摘要翻译：目的：提供一种放置铁合金的控制系统，以便在将第一和第二铁合金注射单元中储存的铁合金平行放入钢水中时，减少钢的进行时间。构成：铁合金控制系统包括第一和第二铁合金注射单元（100,200）和操作控制单元（300）。第一和第二铁合金注射单元分别储存铁合金。第一铁合金注入单元包括用于将铁合金放入钢水中的一个或多个铁合金注入装置（110）。操作控制单元平行地控制第一和第二铁合金注入单元，使得铁合金平行地放入钢水中。

100. 发明公开

KR1020120073640A 고크롬 페라이트 스테인리스강 정련방법 및 정련장치 有权
标题翻译：高铬铁素体不锈钢精炼方法及其精制装置
公开(公告)号：KR1020120073640A
公开(公告)日：2012-07-05
申请号：KR1020100135461
申请日：2010-12-27
申请人： 주식회사 포스코
发明人： 양진일 , 정득식 , 최원탁 , 지현룡
IPC分类号： C21C7/04 , C21C7/10
CPC分类号： C21C5/005 , C21C7/068 , C21C7/10
摘要： PURPOSE: An apparatus and a method for refining high-chrome ferrite stainless steel are provided to prevent firing and damage to a bag filter when restoring pressure after a vacuum oxygen decarburizing process. CONSTITUTION: An apparatus for refining high-chrome ferrite stainless steel comprises a ladle(110) which receives molten metal and includes porous plug for blowing inert gas, a vessel(120) enclosing and sealing the ladle, an upper lance for blowing oxygen into the vessel, a vacuum device(300) which is connected to the vessel to make a vacuum in the vessel, a dust collecting device(220) which is interposed between the vacuum device and the vessel to prevent foreign materials flowing into the vacuum device, and a low-activity gas blowing unit(330) which blows low-activity gas into a pipe connecting the vacuum device and the dust collecting device.
摘要翻译：目的：提供一种精炼高铬铁素体不锈钢的装置和方法，用于在真空氧脱碳过程之后恢复压力时防止燃烧和损坏袋式过滤器。构成：用于精炼高铬铁素体不锈钢的装置包括一个容纳熔融金属的钢包（110），并且包括用于吹入惰性气体的多孔塞子，一个封闭和密封钢包的容器（120），一个用来吹氧的上喷枪容器，连接到容器以在容器中真空的真空装置（300），设置在真空装置和容器之间的集尘装置（220），以防止异物流入真空装置，以及低活性气体吹送单元（330），其将低活性气体吹入连接真空装置和集尘装置的管道中。

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