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    • 3. 发明公开
    • 청정도 향상을 위한 페라이트계 스테인리스강의 정련 방법
    • 精炼不锈钢用于改善清洁度的方法
    • KR1020090062188A
    • 2009-06-17
    • KR1020070129303
    • 2007-12-12
    • 주식회사 포스코
    • 이상범변선민신동익
    • C21C7/00
    • C21C5/005C21C7/0685
    • A method of refining ferritic stainless steel is provided to measure the accurate agitating intensity and adjust the composition based on the measurement, thereby reducing the inclusion in the motel steel. A method of refining ferritic stainless steel comprises a step of attaching a vibration sensor to the exterior of a VOD tank in VOD(Vacuum Oxygen Decarburization) facility which is the secondary refining facility, a step of measuring the specific frequency only among the frequencies output from the vibration sensor, and a step of controlling the bottom bubbling intensity in the composition adjustment after the secondary refining. The attachment position of the vibration sensor is less than 30cm from the tank exterior wall which is located on the straight line with a mount contacting a handle of a ladle in the VOD tank. The specific frequency is in a frequency band of 10~45Hz. In the secondary refining, the bottom bubbling intensity that the vibration index measured from the vibration sensor is compensated with the bottom bubbling flow rate is controlled to 30~50.
    • 提供了一种精炼铁素体不锈钢的方法,以测量精确的搅拌强度,并根据测量调整组成,从而减少汽车钢中的夹杂物。 一种精炼铁素体不锈钢的方法包括将振动传感器附接到作为二次精炼设备的VOD(真空氧化脱碳)设备中的VOD罐的外部的步骤,仅在从 振动传感器,以及在二次精炼后控制组合物调节中的底部鼓泡强度的步骤。 振动传感器的安装位置距离位于直线上的罐外壁小于30cm,安装座与VOD罐中的钢包手柄接触。 具体频率为10〜45Hz的频带。 在二次精炼中,由底部鼓泡流量补偿从振动传感器测得的振动指数的底部鼓泡强度被控制在30〜50。
    • 4. 发明公开
    • 표면품질이 우수한 듀플렉스 스테인리스강 및 이의 제조방법
    • 双面不锈钢及其制造方法,具有良好的表面质量
    • KR1020120074602A
    • 2012-07-06
    • KR1020100136487
    • 2010-12-28
    • 주식회사 포스코
    • 김경석신동익
    • C22C38/00C21D8/00C22C38/40C22C38/58
    • C22C38/58C21D8/0226C22C38/001C22C38/004C22C38/42C22C38/44
    • PURPOSE: Duplex stainless steel with an excellent surface quality and a manufacturing method thereof are provided to roll a steel sheet up to a target thickness by controlling the draft percentage. CONSTITUTION: Duplex stainless steel with an excellent surface quality contains C of 0~0.03wt.%, Si of 0~1.0wt.%, Mn of 0~2.0wt.%, P of 0~0.04wt.%, S of 0~0.004wt.%, Cu of 0~0.5wt.%, Ni of 4.5~6.5wt.%, Cr of 22~23wt.%, Mo of 3.0~3.5wt.%, and N of 0.14~0.20wt.%. A duplex stainless steel with an excellent surface quality comprises residual Fe and inevitable impurities. The ratio(Creq/Nieq) of nickel equivalent and chromium equivalent defined according to the following formula; Nieq=%Ni+30%C+0.5%Mn+0.33%Cu+30(%N-0.045) and Creq=%Cr+%Mo+1.5%Si+0.73%W is 2.2~3.0.
    • 目的:提供具有优异表面质量的双相不锈钢及其制造方法,以通过控制牵伸百分比将钢板轧制至目标厚度。 构成:表面质量优良的双相不锈钢含有0〜0.03重量%的C,0〜1.0重量%的Si,0〜2.0重量%的Mn,0〜0.04重量%的P,0〜 〜0.004重量%,Cu为0〜0.5重量%,Ni为4.5〜6.5重量%,Cr为22〜23重量%,Mo为3.0〜3.5重量%,N为0.14〜0.20重量% 。 具有优异表面质量的双相不锈钢包括残余的Fe和不可避免的杂质。 根据下式定义的镍当量和铬当量的比(Creq / Nieq) Nieq =%Ni + 30%C + 0.5%Mn + 0.33%Cu + 30(%N-0.045),Creq =%Cr +%Mo + 1.5%Si + 0.73%W为2.2〜3.0。
    • 5. 发明公开
    • 자동 마킹 방법
    • 自动标记方法
    • KR1020090041502A
    • 2009-04-29
    • KR1020070107038
    • 2007-10-24
    • 주식회사 포스코
    • 신동익
    • B41M1/28B41F17/00
    • A method for automatic marking is provided to indicate a marking region correctly and to decrease process time by recognizing a location of an intervenient without change of the location after fixing a marking location. A method for automatic marking comprises the following steps of: fixing a marking tip on a lower part of a lens in an optical microscope on a determined location(ST200); raising a sample on a specimen cradle of the optical microscope; moving the specimen cradle on the lower part of the location of the marking tip(ST210); and performing a marking around the intervenient(ST220).
    • 提供了一种用于自动标记的方法,以正确地指示标记区域并且通过在固定标记位置之后不改变位置来识别介入者的位置来缩短处理时间。 一种用于自动标记的方法包括以下步骤:在确定位置上将光学显微镜中的标记末端固定在透镜的下部(ST200)上; 将样品放在光学显微镜的样品支架上; 将标本支架移动到标记位置的下部(ST210); 并在介入者周围进行标记(ST220)。
    • 6. 发明公开
    • 래들처리방법
    • 方法治疗
    • KR1020070067532A
    • 2007-06-28
    • KR1020050128882
    • 2005-12-23
    • 주식회사 포스코
    • 김동식신동익이희호정상열
    • C21C5/52C21C7/00
    • Y02P10/216C21C7/0075C21C5/005F27D2003/167
    • A method for ladle treatment which can improve cleanliness of molten steel by minimizing addition of oxygen and nitrogen into molten stainless steel in a ladle in a stainless steel-making process during injection of a coolant and various alloy irons, thereby reducing nitrogen absorption of molten steel and suppressing reoxidation of molten steel is provided. A method for ladle treatment comprises the steps of: descending an injection port(13a) of a supply pipe(13); injecting an inert gas into the supply pipe; and injecting alloy iron(A) into molten steel(31) in a ladle(21) through the supply pipe. The supply pipe injection port lowering step is performed by lowering the supply pipe injection port such that the injection port is spaced from the surface of molten steel as long as 300 to 500 mm. The inert gas injecting step is performed by injecting the inert gas into the supply pipe in an injection amount of 20 to 200 L/min to create an inert gas atmosphere in the supply pipe, and the alloy iron injecting step comprises blowing the inert gas into the bottom of the ladle such that the molten steel has a naked molten metal diameter of 400 to 800 mm.
    • 一种用于钢包处理的方法,其可以通过在注射冷却剂和各种合金铁中的不锈钢制造过程中最小化钢包中的熔融不锈钢中的氧和氮的添加来提高钢水的清洁度,从而减少钢水的氮吸收 并且提供了抑制钢水的再氧化。 一种钢包处理方法包括以下步骤:使供给管(13)的注入口(13a)下降; 向供给管注入惰性气体; 并通过供给管将合金铁(A)注入浇包(21)中的钢水(31)中。 供给管注入口降低步骤通过使供给管注入口下降,使得注入口与钢水表面间隔300〜500mm。 惰性气体注入步骤是通过以20〜200L / min的注入量将惰性气体注入供给管,在供给管中产生惰性气体气氛,合金铁注入工序包括将惰性气体吹入 浇包的底部,使得钢水的裸露熔融金属直径为400至800mm。
    • 8. 发明公开
    • 내리징성이 우수한 페라이트계 스테인리스강 제조 방법
    • 具有优异耐磨性和制造方法的不锈钢不锈钢板
    • KR1020140080363A
    • 2014-06-30
    • KR1020120150065
    • 2012-12-20
    • 주식회사 포스코
    • 박지언신동익
    • C21D8/02C22C38/00C21D9/46C22C38/50
    • C21D8/0426C21D9/48C21D2211/005C22C38/001C22C38/004C22C38/02C22C38/04C22C38/06C22C38/48C22C38/50
    • The present invention relates to a method of manufacturing a ferritic stainless steel sheet having superior ridging resistance, capable of improving the ridging properties of a ferritic stainless steel sheet by controlling an entry temperature in hot finish rolling. In the method of manufacturing a ferritic stainless steel sheet having superior ridging resistance according to an embodiment of the present invention, a slab containing 0.0005-0.01 wt% of C, 0.005-0.015 wt% of N, 0.01-0.20 wt% of Si, 0.01-0.20 wt% of Mn, 0.001-0.03 wt% of P, 0.0001-0.005 wt% of S, 15.0-17.0 wt% of Cr, 0.01-0.20 wt% of Ni, 0.001-0.10 wt% of Al, 0.10-0.30 wt% of Ti, 0.01- 0.10 wt% of Nb, and the remaining amount of Fe and inevitable impurities is prepared and a hot rough rolling and a hot finish rolling of the slab are performed. A finish-rolling entry temperature (FET) is maintained in the range of 700-900°C.
    • 本发明涉及一种具有优异抗皱性的铁素体系不锈钢板的制造方法,能够通过控制热精轧中的入口温度来提高铁素体系不锈钢板的起皱性能。 在根据本发明的实施方案的制造具有优异抗皱性的铁素体不锈钢板的方法中,将含有0.0005-0.01重量%的C,0.005-0.015重量%的N,0.01-0.20重量%的Si, 0.01〜0.20重量%的Mn,0.001-0.03重量%的P,0.0001-0.005重量%的S,15.0-17.0重量%的Cr,0.01-0.20重量%的Ni,0.001-0.10重量%的Al,0.10- 制备0.30重量%的Ti,0.01〜0.10重量%的Nb,剩余的Fe和不可避免的杂质,进行热轧粗轧和热精轧。 精轧入口温度(FET)保持在700-900℃的范围内。
    • 10. 发明授权
    • 리징 결함이 없는 페라이트계 스테인리스강 및 그 제조방법
    • 无桥自由铁素体不锈钢及其制造方法
    • KR101356929B1
    • 2014-01-29
    • KR1020110144246
    • 2011-12-28
    • 주식회사 포스코
    • 박지언박수호강태형김상석신동익강형구
    • C22C38/00C21D8/00C21D9/46C22C38/26
    • 본 발명은, 중량%로, C : 0.005wt%∼0.05wt%, N : 0.005wt%∼0.05wt%, Si : 0.01wt%∼0.55wt%, Mn : 0.01wt%∼0.70wt%, P : 0.001wt%∼0.035wt%), S : 0.001wt%∼0.005wt%, Cr : 11.0wt%∼17.0wt%, Ni : 0.001wt%∼0.50wt%, Ti : 0.05wt%∼0.25wt%, Nb : 0.05wt%~0.3wt%, 나머지 Fe 및 불순물로 제조된 페라이트계 스테인리스강을 압연기의 양측에 코일러 퍼니스(coiler furnace)를 구비한 스테켈 밀을 통하여 마무리 열간압연을 실시하되, 상기 스테켈 밀의 상부와 하부롤은 이주속 비가 10% 이상의 값을 갖는 이주속 압연으로 제조되는 것을 특징으로 하는 리징결함이 없는 페라이트계 스테인리스강과 그 제조방법을 제공한다. 또한, 본 발명은 상기 조성으로 이루어진 슬라브를 1100℃~1200℃의 범위에서 재가열하고, 스테켈 밀의 압연 시작온도와 코일러 퍼니스에서 강판의 유지시간을 제어할 수 있다. 또한, 본 발명은 상기 열연과정을 거친 강판을 냉간압연을 적어도 2회 실시하되, 2차 압하율이 1차 압하율보다 크도록 하고 2차 압하율이 75% 이상 되도록 하며 냉연후의 소둔온도까지 제어하여 최종적으로 리징결함이 없는 페라이트계 스테인리스 강을 제조할 수 있다.