公开(公告)号：US20180345339A1

公开(公告)日：2018-12-06

申请号：US15761633

申请日：2016-09-23

申请人： POSCO

发明人： Sun-Ho JEON ,  Jun-Seok PARK

IPC分类号： B21B1/22 ,  B32B15/01 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

CPC分类号： B21B1/22 ,  B21B1/227 ,  B21B2001/228 ,  B21B2261/14 ,  B21B2267/10 ,  C23C2/06 ,  C23C2/12 ,  C23C2/26 ,  C25D3/22

摘要： Provided is a method for manufacturing a plated steel sheet having excellent surface qualities and press formability. The method includes: manufacturing a plated steel sheet by plating a base steel sheet; and performing a skin pass rolling process on the plated steel sheet by inserting the plated steel sheet into a skin pass mill. The skin pass rolling process is performed using rolls having roughness skewness Rsk within a range of −0.15 or less.

公开(公告)号：US20200071809A1

公开(公告)日：2020-03-05

申请号：US16468494

申请日：2017-12-13

申请人： POSCO

发明人： Sun-Ho JEON ,  Moon-Hi HONG ,  Jun-Seok PARK ,  Doo-Chan CHANG

IPC分类号： C23C2/40 ,  B21B27/02 ,  B21B27/00 ,  C23C2/06 ,  C23C2/26 ,  B21B1/22

摘要： Provided is a hot-dip galvanized steel sheet used for an automobile outer panel and so forth and, more specifically, to a method for producing a hot-dip galvanized steel sheet having excellent press formability and clarity after painting, and to a hot-dip galvanized steel sheet produced by the method.

公开(公告)号：US20190194792A1

公开(公告)日：2019-06-27

申请号：US16327426

申请日：2017-08-22

申请人： POSCO

发明人： Sang-Heon KIM ,  Hyeon-Seok HWANG ,  Suk-Kyu LEE ,  Sun-Ho JEON ,  Yon-Kyun SONG ,  Bong-Hwan YOO

IPC分类号： C23C2/28 ,  C22C18/04 ,  C23C2/02 ,  C23C2/06 ,  C23C2/20 ,  C23C2/40 ,  C21D9/46

CPC分类号： C23C2/28 ,  C21D9/46 ,  C22C18/00 ,  C22C18/04 ,  C23C2/02 ,  C23C2/06 ,  C23C2/20 ,  C23C2/26 ,  C23C2/40

摘要： Disclosed are a hot-rolled galvanized steel sheet having excellent galling resistance and formability, and a method for manufacturing the same. The hot-rolled galvanized steel sheet, includes: a base steel; and a hot-rolled galvanizing layer formed on the surface of the base steel, wherein the hot-rolled galvanizing layer provides a hot-rolled galvanized steel sheet having a Mn crystallite having a size of 10 μm or less between the resin dendrites of zinc that form sequins.

公开(公告)号：US20160319415A1

公开(公告)日：2016-11-03

申请号：US15108263

申请日：2014-12-24

申请人： POSCO

发明人： Ju-Youn LEE ,  Kwang-Geun CHIN ,  Sun-Ho JEON ,  Jong-Sang KIM ,  Myung-Soo KIM

IPC分类号： C23C2/06 ,  C22C38/58 ,  C22C18/00 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C23C2/36 ,  C22C38/50

CPC分类号： C23C2/06 ,  C22C18/00 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/28 ,  C22C38/50 ,  C22C38/58 ,  C23C2/02 ,  C23C2/36 ,  C23C2/40

摘要： A hot-dip galvanized steel sheet having excellent resistance to cracking caused by liquid metal embrittlement is provided. The hot-dip galvanized steel sheet having excellent resistance to cracking caused by liquid metal embrittlement includes a base steel sheet having a microstructure in which an austenite fraction is 90 area % or more; and a hot-dip galvanizing layer formed on the base steel sheet, wherein the hot-dip galvanizing layer includes an Fe—Zn alloy layer; and a Zn layer formed on the Fe—Zn alloy layer, and the Fe—Zn alloy layer has a thickness of [(3.4×t)/6] μm or more, where t is a thickness of the hot-dip galvanizing layer. In addition, provided is the hot-dip galvanized steel sheet in which plating layer delamination easily occurring in vehicle welding and molding conditions according to the related art, is prevented, and cracking caused by liquid metal embrittlement is suppressed.

摘要翻译： 提供了一种具有优异的抗液体金属脆性破裂的热浸镀锌钢板。 具有优异的耐液态金属脆性破裂性的热浸镀锌钢板包括具有奥氏体分数为90面积％以上的组织的基体钢板; 以及形成在所述基体钢板上的热镀锌层，其中所述热浸镀锌层包括Fe-Zn合金层; 和形成在Fe-Zn合金层上的Zn层，Fe-Zn合金层的厚度为[（3.4×t）/ 6]μm以上，其中t为热镀锌层的厚度。 此外，提供了防止在现有技术的车辆焊接和成型条件下容易发生电镀层分层的热浸镀锌钢板，并且抑制了由液态金属脆化引起的裂纹。

公开(公告)号：US20160244857A1

公开(公告)日：2016-08-25

申请号：US15030830

申请日：2013-12-24

申请人： POSCO

发明人： Sung-Kyu KIM ,  Kwang-Geun CHIN ,  Tae-Jin SONG ,  Tai-Ho KIM ,  Won-Tae CHO ,  Sun-Ho JEON

IPC分类号： C21D9/46 ,  C22C38/00 ,  C22C38/14 ,  C22C38/04 ,  C21D8/02 ,  C21D6/00

CPC分类号： C21D9/46 ,  B21B3/00 ,  C21D6/005 ,  C21D8/02 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C21D2211/001 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14

摘要： The present invention relates to a high-strength and high-manganese steel sheet suitable for an outer panel or a vehicle body of a transport vehicle and, more specifically, to a high-strength and high-manganese steel sheet having excellent vibration-proof properties and a method for producing the same.

摘要翻译： 本发明涉及一种适用于运输车辆的外板或车身的高强度高锰钢板，更具体地说，涉及具有优异的防振性能的高强度高锰钢板 及其制造方法。

公开(公告)号：US20190337031A1

公开(公告)日：2019-11-07

申请号：US16468957

申请日：2017-12-14

申请人： POSCO

发明人： Sun-Ho JEON ,  Moon-Hi HONG ,  Seok-Mo SHIN

IPC分类号： B21B27/00 ,  B21B27/02

摘要： Provided is a rolling roll including: a rolling roll body (112) installed to a rolling mill and used for rolling a material; and a surface treatment part formed on a surface of the rolling roll body (112) and coming into contact with the material, wherein the surface treatment part is formed to have fine concave and convex patterns forming ridges and valleys on a surface thereof, wherein the fine concave and convex patterns are formed such that the roughness skewness, indicating the difference between the height of the ridges and the depth of the valleys, has a negative (−) value.

公开(公告)号：US20180257121A1

公开(公告)日：2018-09-13

申请号：US15761250

申请日：2016-09-23

申请人： POSCO

发明人： Sun-Ho JEON

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： Provided is a method of manufacturing a plated steel sheet having excellent image clarity after coating. The method includes: providing a cold rolled steel sheet by cold rolling; plating the cold rolled steel sheet to manufacture a plated steel sheet; and temper rolling the plated steel sheet by inserting the plated steel sheet into a temper rolling mill. A long-wavelength waviness (Wsa1-5) of a final stand rolling roll is 0.4 μm or less (not including 0) during the cold rolling.

公开(公告)号：US20150329951A1

公开(公告)日：2015-11-19

申请号：US14654507

申请日：2013-12-19

申请人： POSCO

发明人： Sun-Ho JEON ,  Kwang-Geun CHIN ,  Won-Tae CHO

IPC分类号： C23C2/02 ,  C23C2/40 ,  C22C38/58 ,  C22C38/54 ,  B32B15/01 ,  C22C38/34 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C23C2/06 ,  C22C38/50

CPC分类号： C23C2/02 ,  B32B15/013 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0278 ,  C22C38/008 ,  C22C38/02 ,  C22C38/06 ,  C22C38/34 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23C2/06 ,  C23C2/40 ,  Y10T428/1266 ,  Y10T428/12799

摘要： There are provided a method for manufacturing a high manganese hot-dip galvanized steel sheet having superior coatability and ultra-high strength, and a high manganese hot-dip galvanized steel sheet manufactured by the method. The method includes: cold rolling a hot-rolled steel sheet to form a cold-rolled steel sheet, the hot-rolled steel sheet including, by wt %, C: 0.3% to 1%, Mn: 8% to 25%, Si: 0.1% to 3%, Al: 0.01% to 8%, Cr: 0.1% to 2%, Ti: 0.01% to 0.2%, B: 0.0005% to 0.01%, Ni: 0.01% to 2%, Sn: 0.06% to 0.2%, and a balance of Fe and inevitable impurities; heating the cold-rolled steel sheet; cooling the heated steel sheet to, or maintaining the heated steel sheet; and performing a hot-dip galvanizing process on the cooled or temperature-maintained steel sheet by dipping the cooled or temperature-maintained steel sheet into a hot-dip galvanizing bath.

摘要翻译： 提供了一种制造具有优异的可涂覆性和超高强度的高锰热浸镀锌钢板的方法和通过该方法制造的高锰热浸镀锌钢板。 该方法包括：冷轧热轧钢板以形成冷轧钢板，该热轧钢板以重量％计含有C：0.3％至1％，Mn：8％至25％，Si ：0.1〜3％，Al：0.01〜8％，Cr：0.1〜2％，Ti：0.01〜0.2％，B：0.0005〜0.01％，Ni：0.01〜2％，Sn：0.06 ％至0.2％，余量为Fe和不可避免的杂质; 加热冷轧钢板; 将加热的钢板冷却至或保持加热的钢板; 并且通过将冷却或维持维护的钢板浸渍到热浸镀锌浴中，对冷却或维持维护的钢板进行热浸镀锌工艺。