公开(公告)号：EP2612957A4

公开(公告)日：2015-04-08

申请号：EP11821649

申请日：2011-08-25

Applicant: JFE STEEL CORP

Inventor： MASUOKA HIROYUKI ,  ANDO SATORU ,  YAMAMOTO SHUNSUKE

IPC: C23G1/08 ,  B21B3/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/58

CPC classification number: C23G1/08 ,  B21B3/02 ,  B21B45/0269 ,  C21D8/0236 ,  C21D8/0278 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C23G1/00 ,  C23G1/081 ,  C23G1/085 ,  C23G1/086 ,  C23G1/088 ,  Y10T428/26

Abstract: This invention provides a method of producing a cold-rolled steel sheet being excellent in not only the phosphate treatability but also the corrosion resistance after coating under severe corrosion environment such as hot salt water immersion test or composite cycle corrosion test, wherein a continuously annealed steel sheet after cold rolling preferably comprising 0.5-3.0 mass% of Si is pickled to remove a Si-containing oxide layer on a surface layer of the steel sheet and further repickled so that a surface covering ratio of an iron-based oxide on the surface of the steel sheet is not more than 40% and preferably a maximum thickness of the iron-based oxide is not more than 150 nm, as well as a cold-rolled steel sheet produced by this method and a member for automobile using the cold-rolled steel sheet.

Abstract translation: 本发明提供了一种不仅在磷酸盐处理性方面优异的冷轧钢板的制造方法，而且在严酷的腐蚀环境例如热盐水浸渍试验或复合循环腐蚀试验中涂覆后的耐腐蚀性，其中连续退火钢 酸洗后，优选含有0.5〜3.0质量％的Si的片材除去钢板的表面层上的含Si氧化物层，并进一步反复使得表面上的铁基氧化物的表面覆盖率 钢板不超过40％，优选铁基氧化物的最大厚度不大于150nm，以及通过该方法制造的冷轧钢板和使用冷轧的汽车用部件 钢板。

公开(公告)号：EP2495352A4

公开(公告)日：2013-12-25

申请号：EP10826927

申请日：2010-10-28

Applicant: JFE STEEL CORP

Inventor： NAKAMARU HIROKI ,  NAKAJIMA SEIJI ,  MIYOSHI TATSUYA ,  MASUOKA HIROYUKI ,  OOTSUKA SHINJI

IPC: C23C28/00 ,  C22C18/00 ,  C22C38/00 ,  C22C38/60 ,  C23C10/28 ,  C25D3/56

CPC classification number: C21D8/0247 ,  B32B15/01 ,  B32B15/013 ,  B32B15/015 ,  B32B15/04 ,  B32B15/043 ,  B32B15/18 ,  C21D1/673 ,  C21D8/0457 ,  C21D2251/02 ,  C22C18/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/18 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/60 ,  C23C2/06 ,  C23C2/26 ,  C23C2/28 ,  C23C10/28 ,  C23C10/60 ,  C23C26/00 ,  C23C28/321 ,  C23C28/322 ,  C23C28/325 ,  C23C28/345 ,  C23C30/005 ,  C25D3/565 ,  C25D5/48 ,  C25D5/50 ,  Y10T428/12486 ,  Y10T428/1259 ,  Y10T428/12611 ,  Y10T428/12618 ,  Y10T428/1266 ,  Y10T428/12674 ,  Y10T428/12757 ,  Y10T428/12792 ,  Y10T428/12799 ,  Y10T428/12806 ,  Y10T428/12931 ,  Y10T428/12937 ,  Y10T428/12944 ,  Y10T428/12972 ,  Y10T428/12979 ,  Y10T428/2495 ,  Y10T428/24967 ,  Y10T428/264 ,  Y10T428/265

Abstract: A hot-pressed member includes a steel sheet, a Ni-diffusion region present in a surface layer of the steel sheet, and an intermetallic compound layer and a ZnO layer which are provided in order on the Ni-diffusion region, the intermetallic compound layer corresponding to a ³ phase present in a phase equilibrium diagram of a Zn-Ni alloy, wherein a spontaneous immersion potential indicated in a 0.5 M NaCl aqueous air-saturated solution at 25°C ± 5°C is -600 to -360 mV based on a standard hydrogen electrode. The hot-pressed member can be produced without producing scales and can be suppressed from suffering hydrogen entry into steel associated with corrosion and has excellent coating adhesion and corrosion resistance after coating.

公开(公告)号：EP3115482A4

公开(公告)日：2017-05-10

申请号：EP15759246

申请日：2015-02-19

Applicant: JFE STEEL CORP

Inventor： MASUOKA HIROYUKI ,  TAIRA SHOICHIRO ,  TERASAKI YUTA ,  KONDO HIROTSUGU

IPC: C23G1/08 ,  C21D9/46 ,  C22C38/00 ,  C22C38/06

CPC classification number: C22C38/06 ,  C21D8/0478 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C23G1/00 ,  C23G1/08 ,  C23G1/081 ,  C23G1/085 ,  C23G1/086

公开(公告)号：EP2186925A4

公开(公告)日：2015-05-27

申请号：EP08828941

申请日：2008-09-03

Applicant: JFE STEEL CORP

Inventor： MAKIMIZU YOICHI ,  FUJITA SAKAE ,  YOSHIMI NAOTO ,  TADA MASAHIKO ,  OOTSUKA SHINJI ,  MASUOKA HIROYUKI ,  HOSHINO KATSUYA ,  KAJIYAMA HIROSHI ,  NAGOSHI MASAYASU ,  TANIMOTO WATARU ,  FUJIMOTO KYOKO

IPC: C23C22/53 ,  C23C2/26

CPC classification number: A61F13/511 ,  A61F13/5116 ,  A61F13/51305 ,  A61F13/51401 ,  C23C2/26 ,  C23C22/53 ,  Y10T428/12611 ,  Y10T428/12785 ,  Y10T428/12792 ,  Y10T428/12799 ,  Y10T428/265

Abstract: A zinc-based metal plated steel sheet excellent in tribological properties during press forming is provided. An oxide layer containing crystalline 3Zn(OH) 2 ·ZnSO 4 ·xH 2 O is formed on a plated surface. The oxide layer has a thickness of 10 nm or more. The crystalline oxide layer is composed of 3Zn(OH) 2 ·ZnSO 4 ·3-5H 2 O.

Abstract translation: 提供了一种在压制成形期间具有优异的摩擦学性能的锌基金属镀覆钢板。 在镀面上形成含有结晶3Zn（OH）2·ZnSO 4·xH 2 O的氧化物层。 氧化物层的厚度为10nm以上。 结晶氧化物层由3Zn（OH）2·ZnSO 4·3-5H 2 O组成。

公开(公告)号：EP3190211A4

公开(公告)日：2017-10-11

申请号：EP15839041

申请日：2015-08-12

Applicant: JFE STEEL CORP

Inventor： MASUOKA HIROYUKI ,  TAIRA SHOICHIRO ,  FURUYA SHINICHI

IPC: C23G1/08 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/34 ,  C22C38/58 ,  C23G3/02

CPC classification number: C23G1/00 ,  C21D9/46 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/32 ,  C22C38/34 ,  C23G1/08 ,  C23G1/081 ,  C23G1/085 ,  C23G1/086 ,  C23G1/19 ,  C23G3/02

公开(公告)号：EP2612956A4

公开(公告)日：2015-03-18

申请号：EP11821648

申请日：2011-08-25

Applicant: JFE STEEL CORP

Inventor： MASUOKA HIROYUKI ,  ANDO SATORU ,  YAMAMOTO SHUNSUKE

IPC: C23G1/08 ,  B21B3/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/58

CPC classification number: C23G1/085 ,  B21B3/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C21D9/46 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C23G1/00 ,  C23G1/08 ,  Y10T428/265

公开(公告)号：EP2806051A4

公开(公告)日：2015-03-11

申请号：EP13738039

申请日：2013-01-16

Applicant: JFE STEEL CORP

Inventor： MASUOKA HIROYUKI ,  ANDO SATORU ,  AIZAWA SHIGEYUKI ,  NAKAZATO KAZUKI ,  TAIRA SHOICHIRO

IPC: C23G1/08 ,  C22C38/00 ,  C22C38/06 ,  C23G1/00

CPC classification number: C23G1/08 ,  C21D8/02 ,  C21D8/0278 ,  C21D9/562 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23G1/00 ,  C23G1/081 ,  C23G1/085 ,  C23G1/086

公开(公告)号：EP2366812A4

公开(公告)日：2012-04-25

申请号：EP09833249

申请日：2009-04-22

Applicant: JFE STEEL CORP

Inventor： MAKIMIZU YOICHI ,  KAJIYAMA HIROSHI ,  FUJITA SAKAE ,  YOSHIMI NAOTO ,  TADA MASAHIKO ,  MASUOKA HIROYUKI ,  HOSHINO KATSUYA ,  NAGOSHI MASAYASU

IPC: C23C28/00 ,  C23C2/26 ,  C23C2/40 ,  C23C18/12 ,  C23C22/53

CPC classification number: C23C2/12 ,  C23C2/26 ,  C23C2/40 ,  C23C18/1216 ,  C23C18/1241 ,  C23C22/53 ,  C23C28/04

Abstract: A method for manufacturing a galvanized steel sheet, includes: galvanizing a steel sheet; bringing the surface of the steel sheet into contact with an aqueous solution containing zinc ion in the range of 5 to 100 g/l as the zinc ion concentration, having a pH of 4 to 6, and having a liquid temperature of 20 to 70°C, holding the steel sheet for 1 to 60 seconds; and then washing and drying the steel sheet. The solution containing zinc is preferably one containing zinc sulfate, for example. According to the method described above, a galvanized steel sheet having an oxide layer having an average thickness of 10 nm or more and mainly containing zinc formed on the surface of the steel sheet and having excellent press formability can be stably manufactured in a short time.

公开(公告)号：EP3321394A4

公开(公告)日：2018-05-16

申请号：EP16821503

申请日：2016-07-07

Applicant: JFE STEEL CORP

Inventor： TERASAKI YUTA ,  AKIMOTO HIROYUKI ,  MASUOKA HIROYUKI

IPC: C23G1/08 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/38 ,  C23G3/02

CPC classification number: C23G3/028 ,  C21D8/0236 ,  C21D8/0278 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C23G1/00 ,  C23G1/08 ,  C23G1/085 ,  C23G3/021

Abstract: Provided is a method of producing a cold rolled steel strip that enables continuous production with long-term stability of a cold rolled steel strip having excellent chemical convertibility, post-coating corrosion resistance in harsh corrosive environments, and surface appearance quality. The method of producing a cold rolled steel strip includes: subjecting a steel strip that has been cold rolled and subsequently continuously annealed to pickling by continuously feeding the steel strip into a mixed acid solution containing a first acid that is oxidizing and a second acid that is non-oxidizing to immerse the steel strip; and subsequently subjecting the steel strip to repickling by continuously feeding the steel strip into an acid solution containing a third acid that is non-oxidizing to immerse the steel strip. The concentration of the first acid in the mixed acid solution is lowered and the concentration of the second acid in the mixed acid solution is raised as the iron ion concentration in the mixed acid solution rises.

公开(公告)号：EP2821515A4

公开(公告)日：2015-08-05

申请号：EP13755355

申请日：2013-02-25

Applicant: JFE STEEL CORP

Inventor： MASUOKA HIROYUKI ,  SUGIHARA REIKO ,  KAWANO TAKASHI

IPC: C22C38/00 ,  B62D29/00 ,  C21D1/26 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/58 ,  C23F17/00 ,  C23G1/08

CPC classification number: C23G1/086 ,  B62D29/007 ,  C21D1/26 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/58 ,  C23F17/00 ,  C23G1/085

Abstract: A Si-containing high-strength cold rolled steel sheet has a chemical composition comprising C: 0.02ˆ¼0.3 mass%, Si: 0.8ˆ¼2.0 mass%, Mn: 1.0ˆ¼5.0 mass% and the remainder being Fe and inevitable impurities with a ratio of Si content to Mn content (Si/Mn) exceeding 0.4, and has a tensile strength TS of not less than 780 MPa, wherein a metallic structure of the steel sheet surface contains polygonal ferrite and/or bainitic ferrite having a Si concentration of not more than 3.0 mass% and a grain size of not more than 10 µm and does not have a Si-containing oxide layer on the steel sheet surface.

Abstract translation: 含Si高强度冷轧钢板的化学组成为：C：0.02〜0.3质量％，Si：0.8〜2.0质量％，Mn：1.0〜5.0质量％，余量为Fe和不可避免的杂质 其中Si含量与Mn含量（Si / Mn）的比值超过0.4，拉伸强度TS不低于780MPa，钢板表面的金属结构含有多边形铁素体和/或具有Si 浓度为3.0质量％以下，粒径为10μm以下，钢板表面不含有Si的氧化物层。