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71. 发明公开

EP3395989A1 AUSTENITIC STEEL MATERIAL HAVING EXCELLENT HYDROGEN-EMBRITTLEMENT RESISTANCE 有权转让
公开(公告)号：EP3395989A1
公开(公告)日：2018-10-31
申请号：EP16879356.0
申请日：2016-12-22
申请人： POSCO
发明人： LEE, Soon-Gi , KIM, Sung-Kyu , KANG, Sang-Deok
IPC分类号： C22C38/16 , C22C38/04 , C22C38/58 , C22C38/00 , C22C38/44 , C22C38/02
摘要： Disclosed is an austenitic material having excellent hydrogen-embrittlement resistance, comprising, by weight, 0.1-0.5% of C, 5% or less (0% exclusive) of Cu, 1% or less (0% exclusive) of N, a content of Mn satisfying Mn ≥-10.7C+24.5, 10% or less of Cr, 5% or less of Ni, 5% or less of Mo, 4% or less of Si, 5% or less of Al, and a balance amount of Fe and inevitable impurities, with a T-El 2 /T-El 1 ratio of 0.5 or higher, wherein T-El 1 is an elongation at break according to a tensile test at 25°C under an atmospheric condition of 1 atm and T-El 2 is an elongation at break according to a tensile test at 25°C under a hydrogen condition of 70 MPa.

72. 发明公开

EP3392365A1 PRESSURE VESSEL STEEL SHEET HAVING EXCELLENT POST WELD HEAT TREATMENT RESISTANCE, AND MANUFACTURING METHOD THEREFOR 有权转让
公开(公告)号：EP3392365A1
公开(公告)日：2018-10-24
申请号：EP16875911.6
申请日：2016-11-03
申请人： POSCO
发明人： HONG, Soon-Taik
IPC分类号： C22C38/52 , C22C38/48 , C22C38/46 , C22C38/44 , C22C38/42 , C21D8/02 , C21D6/00 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/06
CPC分类号： C21D8/0263 , C21D6/004 , C21D6/005 , C21D6/007 , C21D6/008 , C21D8/02 , C21D8/0226 , C21D8/0273 , C21D9/46 , C21D2211/002 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/52
摘要： The present invention relates to a pressure vessel steel plate for a boiler, a pressure vessel, and the like of a power plant, the pressure vessel steel plate, of a middle high temperature of 350-600°C, having excellent post weld heat treatment (PWHT)resistance and preventing degradation of strength and toughness even though PWHT is performed for a long time, and to a pressure vessel steel plate having an excellent PWHT resistance, and a manufacturing method therefor, the steel plate comprising: 0.05-0.17wt% of C, 0.50-1.00 wt% of Si, 0.3-0.8 wt% of Mn, 1.0-1.5 wt% of Cr, 0.3-1.0 wt% of Mo, 0.003-0.30 wt% of Ni, 0.003-0.30wt% of Cu, 0.005-0.06 wt% of Sol.Al, 0.015 wt% or less of P, and 0.020 wt% or less of S; additionally two or more elements selected from 0.002-0.025 wt% of Nb, 0.002-0.03 wt% of V, and 0.002-0.15 wt% of Co; and the remainder being Fe and inevitable impurities, wherein a microstructure at the center portion of the steel plate comprises a mixed structure of a 20 area% or more of tempered martensite and the remainder being bainite.

73. 发明公开

EP3385402A1 HIGH-STRENGTH STEEL HAVING EXCELLENT BRITTLE CRACK ARRESTABILITY AND WELDING PART BRITTLE CRACK INITIATION RESISTANCE, AND PRODUCTION METHOD THEREFOR 有权转让
公开(公告)号：EP3385402A1
公开(公告)日：2018-10-10
申请号：EP16871086.1
申请日：2016-12-02
申请人： POSCO
发明人： LEE, Hak-Cheol , JANG, Sung-Ho
IPC分类号： C22C38/16 , C22C38/14 , C22C38/12 , C22C38/06 , C22C38/04 , C21D8/02 , B21B37/16 , C22C38/02 , C22C38/08 , C21D9/46
摘要： One aspect of the present invention provides a high-strength steel having excellent brittle crack arrestability and welding part brittle crack initiation resistance, and a production method therefor. According to one aspect of the present invention, provided are a high-strength steel having excellent brittle crack arrestability and welding part brittle crack initiation resistance, and a production method therefor, the high-strength steel: comprising, in wt%, C: 0.05-0.09%, Mn: 1.5-2.0%, Ni: 0.3-0.8%, Nb: 0.005-0.04%, Ti: 0.005-0.04%, Cu: 0.1-0.5%, Si: 0.05-0.3%, Al: 0.005-0.05%, P: 100ppm or less, S: 40ppm or less, and a remainder made up by Fe and other inevitable impurities; having a center part microstructure comprising, in area%, 70% or more of acicular ferrite and 10% or more of pearlite, wherein the equivalent circular diameter of the pearlite is 15 µm (micrometers) or less; having, in a 2mm or less subsurface region, a microstructure comprising, in area%, 30% or more of one type or more among ferrite and a remainder made up by bainite, martensite, and pearlite; and having a welding heat affected zone, which is formed when welding, that comprises, in area%, 5% or less of a martensite-austenite constituent. According to the present invention, high-strength steel having high yield strength, excellent brittle crack arrestability, and excellent welding part brittle crack initiation resistance may be obtained.

74. 发明公开

EP3363926A1 STAINLESS STEEL FOR FUEL CELL SEPARATOR PLATE AND MANUFACTURING METHOD THEREFOR 有权转让
公开(公告)号：EP3363926A1
公开(公告)日：2018-08-22
申请号：EP16848773.4
申请日：2016-07-29
申请人： Posco
发明人： KIM, Kwang Min , KIM, Jong Hee , JO, Ki Hoon , SEO, Bo Sung
IPC分类号： C22C38/50 , C22C38/48 , C22C38/44 , H01M8/1018 , H01M8/0217 , H01M8/0228 , C22C38/00 , C22C38/02 , C22C38/04 , C25F3/06 , C23G1/08 , C25F5/00 , H01M8/021
CPC分类号： H01M2/1646 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/44 , C22C38/48 , C22C38/50 , C23F1/28 , C23G1/086 , C25F3/06 , C25F5/00 , H01M8/021 , H01M8/0219 , H01M8/0228 , H01M8/1004 , H01M8/1018 , Y02P70/56
摘要： Stainless steel for a fuel cell separator plate and a manufacturing method therefor are disclosed. The stainless steel for a fuel cell separator plate, according to one embodiment of the present invention, comprises: a stainless base material; and a passive film formed on the stainless base material, wherein a Cr/Fe atomic weight ratio in a 1nm or less thickness region of the stainless base material, which is adjacent to an interface between the stainless and the passive film, is 0.45 or more. Therefore, by modifying the surface of the stainless steel for a fuel cell separator plate, a low interface contact resistance and a good corrosion resistance can be obtained, and a separate additional process such as precious metal coating can be removed, such that manufacturing costs are reduced and productivity can be improved.

75. 发明公开

EP3354359A1 METHOD FOR MANUFACTURING PLATED STEEL SHEET HAVING EXCELLENT CLARITY OF IMAGE AFTER COATING, AND PLATED STEEL SHEET MANUFACTURED THEREBY 有权转让
公开(公告)号：EP3354359A1
公开(公告)日：2018-08-01
申请号：EP16848998.7
申请日：2016-09-23
申请人： Posco
发明人： JEON, Sun-Ho
IPC分类号： B21B1/22 , B21B27/02 , C23C2/06 , C23C2/12 , C25D3/22
CPC分类号： B21B1/22 , B21B27/02 , B21B2001/228 , B21B2261/00 , B21B2267/00 , C23C2/06 , C23C2/12 , C25D3/22
摘要： The present invention relates to a plated steel sheet used as an automobile outer panel, etc., and more specifically, to a method for manufacturing a plated steel sheet having excellent clarity of image after coating, and a plated steel sheet manufactured thereby.

76. 发明授权

EP2940191B1 ZN-MG ALLOY PLATED STEEL SHEET, AND METHOD FOR MANUFACTURING SAME 有权转让
标题翻译： ZN-MG合金镀层钢板及其制造方法
公开(公告)号：EP2940191B1
公开(公告)日：2018-05-16
申请号：EP12891070.0
申请日：2012-12-28
申请人： Posco
发明人： JUNG, Woo-Sung , HONG, Seok-Jun , NAM, Kyung-Hoon , LEE, Dong-Yoeul , JUNG, Yong-Hwa , KWAK, Young-Jin , EOM, Mun-Jong , KIM, Tae-Yeob
IPC分类号： C23C30/00 , B32B15/04 , C22C18/00 , C23C14/56 , C23C14/16 , B32B15/01 , C23C14/26 , C23C14/30 , C23C14/34
CPC分类号： B32B15/013 , C22C18/00 , C23C14/16 , C23C14/26 , C23C14/30 , C23C14/34 , C23C14/3414 , C23C14/562 , Y10T428/12799
摘要： Provided are a Zn-Mg alloy plated steel sheet and a method for manufacturing same. The Zn-Mg alloy plated steel sheet comprises a base steel sheet and a Zn-Mg plating layer formed on the base steel sheet, wherein the content of Mg in the Zn-Mg plating layer is 8 weight% or less (provided that 0 weight% is excluded), and the Zn-Mg plating layer is a compound phase of Zn and Mg2Zn11. According to the present invention, provided are a Zn-Mg alloy plated steel sheet and a method for manufacturing the same, wherein the Zn-Mg alloy plated steel sheet has excellent corrosion resistance, high adhesion, and superior surface quality of metallic luster.

77. 发明公开

EP3305933A1 HIGH-STRENGTH THIN STEEL SHEET WITH EXCELLENT DRAWABILITY AND BAKE HARDENABILITY, AND METHOD FOR MANUFACTURING SAME 有权转让
标题翻译：具有优良可拉性和烘烤硬度的高强度薄钢板及其制造方法
公开(公告)号：EP3305933A1
公开(公告)日：2018-04-11
申请号：EP16803809.9
申请日：2016-06-07
申请人： Posco
发明人： HAN, Sang-Ho
IPC分类号： C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , C22C38/12 , C21D8/02 , C21D9/46
摘要： Disclosed are a high-strength thin steel sheet with excellent drawability and bake hardenability, and a method for manufacturing the same, the high-strength thin steel sheet comprising: 0.0005 to 0.003 wt% of C; 0.5 wt% or less (excluding 0 wt%) of Si; 1.2 wt% or less (excluding 0 wt%) of Mn; 0.005 to 0.12 wt% of P; 0.008 wt% or less of S; 0.005 wt% or less of N; 0.1 wt% or less (excluding 0 wt%) of acid soluble Al; and 0.01 to 0.04 wt% of Ti, with the remainder comprising Fe and unavoidable impurities, wherein the high-strength thin steel sheet has P, defined by the following mathematical equation 1, of 80% or more and bake hardenability (BH) of 4MPa or more: [mathematical equation 1] P(%)={Nin/(Nin+Ngb)}×100 (provided that Nin denotes the number of carbides present within crystal grains and having a size of 20 nm or less, and Ngb denotes the number of carbides present within grain boundaries and having a size of 20 nm or less).
摘要翻译：一种高强度薄钢板及其制造方法，该高强度薄钢板具有优良的拉深加工性和烘烤硬化性，所述高强度薄钢板包含：C：0.0005〜0.003重量％ 0.5重量％或更少（不包括0重量％）的Si; 1.2重量％或更少（不包括0重量％）的Mn; P：0.005〜0.12重量％ S：0.008重量％以下; 0.005重量％以下的N; 0.1重量％或更少（不包括0重量％）的酸溶性Al; 和0.01-0.04重量％的Ti，余量由Fe和不可避免的杂质组成，其中高强度薄钢板具有由以下数学式1定义的P为80％以上并且烘烤硬化性（BH）为4MPa 或更多：[数学式1] P（％）= {Nin /（Nin + Ngb）}×100（条件是Nin表示晶粒内存在的碳化物的数量并且具有20nm或更小的尺寸，并且Ngb表示存在于晶界内且具有20nm或更小尺寸的碳化物的数目）。

78. 发明公开

EP3292925A2 MOLD FLUX AND CONTINUOUS CASTING METHOD USING SAME, AND SLAB MANUFACTURED USING SAME 有权转让
标题翻译：模具通量和使用该方法的连续铸造方法以及使用该方法制造的板坯
公开(公告)号：EP3292925A2
公开(公告)日：2018-03-14
申请号：EP15891325.1
申请日：2015-08-26
申请人： Posco
发明人： CHUNG, Tae In , HAN, Sang Woo
IPC分类号： B22D11/108 , B22D11/111 , C22C38/04
CPC分类号： B22D11/108 , B22D11/111 , C22C38/04 , Y02P10/242
摘要： The present invention relates to a mold flux and a continuous casting method using the same, and a slab manufactured using the same, and comprises a composition containing SiO 2 , CaO, MgO, Al 2 O 3 , Na 2 O, F and nickel (Ni) oxides. A coating layer comprising nickel (Ni) oxide is formed on the surface of the slab while supplying, to the upper part of a molten steel, a mold flux containing 5 wt% to 40 wt% of nickel (Ni) oxide with respect to the total weight of the composition, whereby it is possible to provide a slab capable of preventing surface defects, comprising a surface part from the outermost side to the inner side of the slab and a center part from the surface part to the center of the slab on the basis of the thickness direction of the slab, with the surface part having a higher Ni concentration than the center part. That is, by forming a Ni oxide-enriched layer having a low oxygen affinity on the surface of the slab, the solidification behavior of steel is controlled so as to cause a hypo-peritectic reaction with low solidification and shrinkage on the surface of the slab, whereby it is possible to prevent defects that may occur due to the enrichment of copper of the molten steel on the surface of the slab. Accordingly, it is possible to reduce the amount of a metal-containing material used as compared with conventional art in which a material containing a metal such as Ni is mixed with a molten steel in order to prevent defects that may be caused by copper, thereby preventing an increase in the manufacturing cost due to the use of a material containing a high-priced metal.
摘要翻译：本发明涉及一种保护渣和使用该保护渣的连续铸造方法，以及使用该保护渣制造的铸坯，并且包括含有SiO2，CaO，MgO，Al2O3，Na2O，F和镍（Ni）氧化物的组合物。在钢板的表面上形成包含镍（Ni）氧化物的涂层，同时向钢水的上部供应包含相对于该镍（Ni）氧化物为5重量％至40重量％的氧化镍由此可以提供一种能够防止表面缺陷的板坯，其包括从板坯的最外侧到内侧的表面部分和从板材的表面部分到板的中心的中心部分是板坯厚度方向的基础，表面部分具有比中心部分更高的Ni浓度。即，通过在板坯表面形成氧亲和力低的Ni氧化物富集层，控制钢的凝固行为，使板坯表面的凝固收缩低而发生次包晶反应由此可以防止由于在钢坯表面上富集钢水而可能发生的缺陷。因此，与现有技术相比，可以减少所使用的含金属材料的量，在现有技术中，为了防止可能由铜引起的缺陷，将含有诸如Ni之类的金属的材料与钢水混合，防止由于使用含有高价金属的材料而导致制造成本增加。

79. 发明公开

EP3239338A4 HOT PRESS FORMED PARTS HAVING EXCELLENT BENDING PROPERTIES AND METHOD FOR MANUFACTURING SAME 有权转让
公开(公告)号：EP3239338A4
公开(公告)日：2018-01-24
申请号：EP15873409
申请日：2015-04-29
申请人： POSCO
发明人： OH JIN-KEUN , CHO YEOL-RAE , KIM SEONG-WOO
IPC分类号： C22C38/38 , B32B15/01 , C21D8/02 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/28 , C22C38/32 , C23C2/12 , C23C2/28 , C23C2/40
CPC分类号： C21D9/46 , B32B15/012 , C21D8/0226 , C21D8/0236 , C21D8/0247 , C21D8/0284 , C21D2211/004 , C21D2211/005 , C22C21/02 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/28 , C22C38/32 , C23C2/12 , C23C2/28 , C23C2/40
摘要： Provided are hot press formed (HPF) parts having excellent bending properties and a method for manufacturing same. The present invention relates to an HPF part having excellent bending properties, the HPF part having a hot-dip aluminum plated layer formed on a surface of a base steel sheet, wherein the base steel sheet includes, in terms of wt%, 0.18-0.25% of C, 0.1-0.5% of Si,0.9-1.5% of Mn, 0.03% or less of P, 0.01% or less of S, 0.01-0.05% of Al, 0.05-0.5% of Cr, 0.01-0.05% of Ti, 0.001-0.005% of B, 0.009% or less of N, the balance Fe and other impurities; a ferrite phase having a thickness within 50 µ m is continuously or discontinuously formed inside a surface portion of the base steel sheet; the fraction of the surface portion occupied by the ferrite phase is 5% or less; and carbide materials having a size of 1 µ m or less are scattered and distributed in the surface portion of the base steel sheet so as to occupy 90% or more of the overall carbide distribution.

80. 发明公开

EP3239023A4 PILLAR MEMBER AND ROLL FORMED MEMBER OF VEHICLE 有权转让
公开(公告)号：EP3239023A4
公开(公告)日：2018-01-17
申请号：EP15873623
申请日：2015-12-22
申请人： POSCO
发明人： KIM DON-GUN , CHOI HAN-HO
IPC分类号： B62D25/04 , B21B1/08 , B62D21/15 , B62D25/06 , B62D29/00
CPC分类号： B62D25/04 , B21B1/08 , B21B2263/02 , B62D21/157 , B62D25/06 , B62D29/007
摘要： The present invention provides a pillar member of a vehicle, which is characterized by comprising: a pillar main body portion forming at least one closed cross section portion; and a connecting and joining portion provided on both ends of the pillar main body portion and coupled to a vehicle body. The pillar main body portion and the connecting and joining portion are continuously formed. The connecting and joining portion includes: a first connecting and joining portion provided on one side of the pillar main body portion; and a second connecting and joining portion provided on the other side of the pillar main body portion so as to face the first connecting and joining portion. The pillar main body portion is continuously formed through a roll forming technique in a region between the first connecting and joining portion and the second connecting and joining portion, and has an odd number of closed cross section portions formed therein.

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