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公开(公告)号：KR101171112B1
公开(公告)日：2012-08-03
申请号：KR1020040107080
申请日：2004-12-16
Applicant: 주식회사 포스코
IPC: C22C38/00
Abstract: 자동차, 가전제품 등의 소재로 사용되는 냉연강판과 그 제조방법이 제공된다. 본 발명의 냉연강판은, 중량%로 C:0.0005~0.003%, Mn:0.03~0.2%, S:0.003~0.025%, Al:0.01~0.08%, N:0.004%이하, P:0.015%이하, Cu:0.005~0.2%를 포함하고, 상기 Mn, Cu, S가 조건 Mn+Cu≤0.3, 0.5*(Mn+Cu)/S:2~20를 만족하고, 나머지 Fe 및 기타 불가피한 불순물로 조성되며, 석출물의 평균크기가 0.2㎛이하로 이루어진다. 본 발명의 냉연강판은 미세한 석출물에 의해 결정립내 고용탄소량이 줄어들어 내시효특성이 개선되면서 가공성이 개선된다.
냉연강판, 내시효, 고용탄소. (Mn,Cu)S석출물-
公开(公告)号：KR1020100073722A
公开(公告)日：2010-07-01
申请号：KR1020080132472
申请日：2008-12-23
Applicant: 주식회사 포스코
IPC: C23C2/00
Abstract: PURPOSE: A device for removing the impurity of a plating bath roll is provided to the sticking of dross to a plating bath roll without damage to a plating bath. CONSTITUTION: A device for removing the impurity of a plating bath roll comprises an excitation generator(30) and an excitation member(50). The excitation generator is formed in a frame member. A plating bath roll is installed on the frame member. The excitation member is connected to the excitation generator. The excitation generator is positioned close to the plating bath roll and prevents the attaching of foreign material to the plating bath roll.
Abstract translation: 目的：提供一种用于除去镀浴辊杂质的装置，用于将浮渣粘附到镀浴辊上而不损坏电镀液。 构成：用于去除镀浴辊杂质的装置包括激发发生器（30）和激励构件（50）。 励磁发生器形成在框架构件中。 电镀槽辊安装在框架部件上。 励磁构件连接到励磁发电机。 激发发生器位于镀浴辊附近，防止异物附着在镀浴辊上。
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公开(公告)号：KR1020100073719A
公开(公告)日：2010-07-01
申请号：KR1020080132469
申请日：2008-12-23
Applicant: 주식회사 포스코
IPC: C23C2/00
Abstract: PURPOSE: A snout device of a steel plating line is provided to prevent the plating failure of a steel sheet by preventing a sink material from sticking to the inside of the snout device. CONSTITUTION: A snout device of a steel plating line comprises a snout main body(10), a first excitation member(30), and a second excitation member(130). The snout main body is connected between a furnace(210) and a plating bath(230). A plated steel sheet(200) passes through the snout main body. The first excitation member is connected to the snout main body. The first excitation member activates an ultrasonic generator in order to prevent zinc ash from sticking to the main body. The second excitation member is located inside the snout main body.
Abstract translation: 目的：提供镀钢线的喷嘴装置，通过防止水槽材料粘附到喷嘴装置的内部来防止钢板的电镀故障。 构成：镀钢线的喷嘴装置包括喷嘴主体（10），第一激励部件（30）和第二激励部件（130）。 喷嘴主体连接在炉（210）和镀浴（230）之间。 电镀钢板（200）穿过喷嘴主体。 第一激励构件连接到鼻部主体。 第一激励构件激活超声波发生器以防止锌灰粘附到主体。 第二激励构件位于鼻部主体内。
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公开(公告)号：KR100815813B1
公开(公告)日：2008-03-20
申请号：KR1020060137019
申请日：2006-12-28
Applicant: 주식회사 포스코
CPC classification number: C22C38/004 , C22C38/04 , C22C38/16 , C23C2/06
Abstract: A galvanized steel sheet with improved surface roughness and a method for manufacturing the same are provided to improve surface roughness of the galvanizing layer by containing S between a steel sheet and a galvanizing layer in order to enhance yield strength. A galvanized steel sheet with improved surface roughness includes: a steel sheet having a composition comprising, by weight percent, 0.005% or less(without including 0%) of C, 0.003 to 0.02% of S, and one or two of 0.2% or less(without including 0%) of Mn and 0.2% or less(without including 0%) of Cu with the balance of Fe and other inevitable impurities; and a Zn-based coating layer with a roughness(Ra) of 0.7 to 0.8 micrometer formed on an upper part of the steel sheet, wherein 0.005 to 20 ppm of S and 0.005 to 0.05 ppm of Na coexist between the steel sheet and the Zn-based coating layer. A method for manufacturing a galvanized steel sheet with improved surface roughness includes the steps of: applying an S-containing solution having a composition comprising 20 to 30% of 2-mercaptobenzothiazole, 5 to 15% of sodium hydroxide, and the balance of water onto a steel sheet having a composition comprising, by weight percent, 0.005% or less(without including 0%) of C, 0.003 to 0.02% of S, and one or two of 0.2% or less(without including 0%) of Mn and 0.2% or less(without including 0%) of Cu with the balance of Fe and other inevitable impurities; annealing the solution coated steel sheet; and coating the annealed steel sheet in a hot dip galvanizing bath.
Abstract translation: 提供一种具有改善的表面粗糙度的镀锌钢板及其制造方法，以通过在钢板和镀锌层之间包含S来改善镀层的表面粗糙度，以提高屈服强度。 具有改善的表面粗糙度的镀锌钢板包括：具有重量％0.005％或更少（不包括0％）C，0.003至0.02％S和0.2％或0.2％ 较少（不含0％）的Mn和0.2％以下（不含0％）的Cu，余量为Fe等不可避免的杂质; 并且在钢板的上部形成有粗糙度（Ra）为0.7〜0.8微米的Zn系涂层，其中，在钢板和Zn之间共存有0.005〜20ppm的S和0.005〜0.05ppm的Na 基涂层。 具有改善的表面粗糙度的镀锌钢板的制造方法包括以下步骤：将含有20〜30％的2-巯基苯并噻唑，5〜15％的氢氧化钠和余量的水的含S溶液涂布到 具有以重量％计含有0.005％以下（不含0％）C，0.003〜0.02％S，和0.2％以下（不含0％）Mn中的1种或2种以下的组成的钢板， 0.2％以下（不含0％）Cu，余量为Fe等不可避免的杂质; 退火溶液涂层钢板; 并将退火的钢板涂布在热浸镀锌浴中。
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公开(公告)号：KR1020040056304A
公开(公告)日：2004-06-30
申请号：KR1020020082907
申请日：2002-12-23
Applicant: 주식회사 포스코 , 재단법인 포항산업과학연구원
IPC: C22C38/02
Abstract: PURPOSE: A hot dip coated strip for PCM(precoated metal) is provided which obtains yield strength of 24 kg/mm¬2 or more and superior electromagnetic field shielding power by properly controlling constituents composing the strip and soft reduction conditions, and a manufacturing method thereof is provided. CONSTITUTION: The high strength hot dip coated strip having superior electromagnetic wave shielding property after soft reduction comprises 0.015 wt.% or less of C+N+S, 0.007 wt.% or less of O, 0.15 to 0.35 wt.% of Mn, 0.15 to 0.45 wt.% of Si, 0.1 to 0.30 wt.% of Cu+Sn, 0.01 to 0.06 wt.% of P and a balance of Fe and inevitable impurities. The manufacturing method of the high strength hot dip coated strip for PCM comprises a step of hot rolling the reheated steel slab after reheating a steel slab comprising 0.015 wt.% or less of C+N+S, 0.007 wt.% or less of O, 0.15 to 0.35 wt.% of Mn, 0.15 to 0.45 wt.% of Si, 0.1 to 0.30 wt.% of Cu+Sn, 0.01 to 0.06 wt.% of P and a balance of Fe and inevitable impurities; a step of annealing the cold rolled strip at a temperature of 750 to 880 deg.C after cold rolling the hot rolled strip to a reduction ratio of 70 to 85%; and a step of soft rolling the hot dip coated strip under the conditions that soft reduction load is 200 to 350 ton force, and soft reduction tension is 3 to 6 ton force after hot dip coating the annealed strip.
Abstract translation: 目的：提供一种用于PCM（预涂金属）的热浸涂层条，其通过适当地控制构成条带的组成和软还原条件而获得24kg / mm2以上的屈服强度和优异的电磁场屏蔽能力，以及制造方法 提供。 构成：软还原后具有优异的电磁波屏蔽性能的高强度热浸镀带具有0.015重量％以下的C + N + S，0.007重量％以下的O，0.15〜0.35重量％的Mn， Si：0.15〜0.45重量％，Cu + Sn：0.1〜0.30重量％，P：0.01〜0.06重量％，Fe：不可避免的杂质。 用于PCM的高强度热浸镀带的制造方法包括：对再加热钢坯后的再加热钢坯进行热轧的工序，所述钢坯包含0.015重量％以下的C + N + S，0.007重量％以下的O ，0.15〜0.35重量％的Mn，0.15〜0.45重量％的Si，0.1〜0.30重量％的Cu + Sn，0.01〜0.06重量％的P，余量的Fe和不可避免的杂质; 将热轧带材冷轧后的冷轧带材在750〜880℃的温度下退火至70〜85％的压下率的工序。 以及在软压缩载荷为200〜350吨力的条件下软浸热浸镀带的步骤，在对该退火后的带材进行热浸镀后，软压下张力为3〜6吨。
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Patent Agency Ranking
公开(公告)号：KR1020030085949A
公开(公告)日：2003-11-07
申请号：KR1020020024258
申请日：2002-05-02
Applicant: 주식회사 포스코
IPC: B21B45/06
CPC classification number: B21B45/06 , B21B27/00 , B21B39/082 , B21B2015/0064 , B21B2015/0071
Abstract: PURPOSE: A system and a method for removing scale on steel strip are provided to optimize descale efficiency by pre-rolling method using efficiency of tension leveller and seeking optimization of work rolls of rolling mill for pre-rolling. CONSTITUTION: The system comprises a payoff reel(10) for unwinding steel strip coiled in a coil; a pre-rolling mill(20) for rolling the strip unwound from the payoff reel to a certain reduction ratio; a tension leveller(30) installed at the output side of the pre-rolling mill to generate cracks on the surface of the strip by giving plastic deformation to the strip passing through the pre-rolling mill; bridle rolls(12) positioned at the input side of the pre-rolling mill and at the output side of the tension leveller to control tension of the strip threaded by the pre-rolling mill and tension leveller; brush grinder(40) and water washing tank(41) for grinding the surface of the strip to remove cracked scales on the surface of the strip passing through the bridle rolls; and pickling tank(50) and water washing tank(51) for finally removing scales on the surface of the strip passing through the water washing tank, wherein the rolling rolls of the pre-rolling mill are ceramic rolls.
Abstract translation: 目的：提供一种去除钢带尺度的系统和方法，通过使用张力矫直机的效率的预轧方法优化除鳞效率，并优化轧制轧机的轧辊。 构成：该系统包括用于退绕卷绕在线圈中的钢带的收益卷轴（10） 用于将从收益卷轴退绕的条带滚动到一定的减速比的预轧机（20）; 安装在预轧机的输出侧的张力调平器（30），通过对通过预轧机的带材施加塑性变形，在带材的表面上产生裂纹; 位于预轧机的输入侧和张力矫直机的输出侧的张紧辊（12），以控制由预轧机和张力矫直机螺纹的带材的张力; 刷磨机（40）和水洗槽（41），用于研磨带材的表面，以去除穿过绷带辊的带材表面上的裂纹; 和酸洗槽（50）和水洗槽（51），最后除去通过水洗槽的带材的表面上的鳞片，其中预轧机的轧辊是陶瓷辊。
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公开(公告)号：KR1020030054971A
公开(公告)日：2003-07-02
申请号：KR1020010085412
申请日：2001-12-26
Applicant: 주식회사 포스코
IPC: C23C2/00
CPC classification number: C23C4/123 , B05B5/0255 , B05B17/06 , B05D1/06
Abstract: PURPOSE: An apparatus and a method for continuously coating strip are provided to lower manufacturing cost of strip and improve quality of strip by atomizing molten metal at a non-oxidizing or reducing atmosphere so that the atomized molten metal is adhered to the surface of the strip. CONSTITUTION: The apparatus for continuously coating strip comprises a plating pot(10) in which a sealed space is secured, into which an atmospheric gas having certain characteristics corresponding to molten metal is supplied, and through a central part of which strip (S) passes; a molten metal supply means(30) installed inside the plating pot(10) to supply molten metal; atomization generating means(50) comprising supersonic oscillators(52) which are inserted toward transferring strip (S) from both sides of the plating pot(10) in such a way that air-tightness is maintained between the atomization generating means(50) and plating pot(10), and which atomize molten metal from the molten metal supply means(30); and an electrostatic charged electrode member(70) installed inside the plating pot in the lower side of the atomization generating means(50) to apply electrical attraction to the strip so that droplet of atomized molten metal is adhered to the strip in case of impressing of high voltage, wherein the molten metal supply means(30) comprises molten metal storage tank(32), and molten metal tank(34), the atomization generating means(50) comprise casing(54), supersonic oscillator(52), wave guide(56), and supersonic horn(58).
Abstract translation: 目的：提供一种用于连续涂覆带材的设备和方法，以降低带材的制造成本并通过在非氧化或还原气氛下雾化熔融金属来提高条带的质量，使得雾化的熔融金属粘附到条带的表面 。 构成：连续涂布带的装置包括：电镀罐（10），其中固定有密封空间，其中提供具有与熔融金属相对应的一定特性的气氛气体，并且通过其中的条带（S）通过的中心部分 ; 设置在所述电镀罐（10）内部以供应熔融金属的熔融金属供给装置（30） 雾化发生装置（50）包括超声波振荡器（52），其从电镀罐（10）的两侧朝向传送带（S）插入，以使得在雾化发生装置（50）和 电镀罐（10），并且熔融金属供给装置（30）雾化熔融金属; 以及安装在雾化发生装置（50）的下侧的电镀槽内部的静电充电电极部件（70），以对该条带施加电吸引，使得雾化的熔融金属液滴在压印 高压，其中熔融金属供给装置（30）包括熔融金属储罐（32）和熔融金属罐（34），雾化产生装置（50）包括外壳（54），超音速振荡器（52），波导 （56）和超音速喇叭（58）。
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公开(公告)号：KR1019990051997A
公开(公告)日：1999-07-05
申请号：KR1019970071438
申请日：1997-12-20
Applicant: 주식회사 포스코 , 미츠비시 쥬고교 가부시키가이샤
IPC: C21D1/00
Abstract: 본 발명은 유도가열장치를 사용하고 있는 도금강판의 합금상의 형성에 필요한 적정한 가열온도을 공급하는 가열로의 강판 온도를 정확히 알 수 있는 수단을 갖춘 아연도금강판의 합금화 처리장치를 제공하는 것을 목적으로 한다.
상기 목적달성을 위한 본 발명은 유도가열코일을 이용한 합금화 열처리장치에 있어서, 고주파가열장치의 임피던스에서 가열로내의 강판의 온도를 측정하고, 이 온도를 기초로 피드백에 의한 가열량을 제어하는 것을 그 기술적 요지로 한다.-
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公开(公告)号：KR101105132B1
公开(公告)日：2012-01-16
申请号：KR1020030095394
申请日：2003-12-23
Applicant: 주식회사 포스코
IPC: C22C38/00
Abstract: 본 발명은 자동차 등의 소재로 사용되는 소부경화형 고강도 냉연강판에 관한 것이다.이 냉연강판은, 중량%로 C:0.003~0.005%, Mn:0.05-0.2%, S:0.005-0.03%, Al:0.01-0.1%, N:0.004%이하, P:0.03~0.2%, 상기 Mn와 S의 중량비가 다음의 조건 0.58*Mn/S≤10를 만족하고, 나머지 Fe 및 기타 불가피한 불순물로 조성되며, MnS석출물의 평균크기가 0.2㎛이하로 이루어진다. 또한, 이 냉연강판의 제조방법 역시 제공된다.
본 발명의 냉연강판은 항복강도 250Mpa이상에서 소부후 항복강도 상승이 클 뿐 아니라, 항복강도-연성밸런스가 10300이상이어서 제품두께를 줄 일수 있어 경량화 효과가 있으며, 연성-취성 천이온도(DBTT)가 -40℃이하로 극한지방에서 사용가능하다. 또한, 소성이방성지수(r
m )가 1.46이상이고, 면내이방성 지수(△r)가 0.3이하로서 가공시 주름 발생이 적으며 가공후에는 귀(ear) 발생이 적다.
냉연강판, 소부경화, 고강도, 2차가공취성, MnS석출물
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