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公开(公告)号：US11174556B2
公开(公告)日：2021-11-16
申请号：US16340134
申请日：2017-10-06
Applicant: JFE STEEL CORPORATION
Inventor： Reona Endo , Kazuhisa Okai , Hiroshi Kajiyama , Takashi Kawano
Abstract: Disclosed is a surface-treatment solution for producing a zinc or zinc alloy coated steel sheet with a surface-coating layer that does not contain a chromium compound in the surface-coating layer and that is excellent in all of heat discoloration resistance, heat cracking resistance, planar part anti-corrosion property, corrosion resistance after alkali degreasing, blackening resistance, stack blackening resistance, anti-water stain property, solvent resistance, perspiration resistance, coating adhesion property, and storage stability. The disclosed surface-treatment solution contains a glycidyl group-containing silane coupling agent (A), a tetraalkoxysilane (B), a zirconium carbonate compound (C), and an anionic polyurethane resin (D) having a glass transition temperature (Tg) of 80° C. to 130° C., a vanadium compound (E), a molybdic acid compound (F), and water, the surface-treatment solution having a pH of 8.0 to 10.0, and the amount of each component satisfying a predetermined relationship.
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公开(公告)号：US09761361B2
公开(公告)日：2017-09-12
申请号：US14376916
申请日：2013-02-08
Applicant: JFE Steel Corporation
Inventor： Seiji Okabe , Shigehiro Takajo , Takashi Kawano
IPC: H01F1/16 , C21D8/12 , C22C38/00 , C22C38/60 , C21D1/38 , C22C38/02 , C22C38/04 , C22C38/08 , C22C38/12 , C22C38/16
CPC classification number: H01F1/16 , C21D1/38 , C21D8/12 , C21D8/125 , C21D2201/05 , C22C38/00 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/60
Abstract: A grain-oriented electrical steel sheet produces reduced noise when worked into a transformer, by setting length d of each plastic strain region in the widthwise direction of the steel sheet to 0.05 mm or more and 0.4 mm or less, and a ratio (Σd/Σw) of a total Σd of the length d to a total Σw of application interval w of each of the above plastic strain regions to 0.2 or more and 0.6 or less.
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公开(公告)号：US10174430B2
公开(公告)日：2019-01-08
申请号：US14379968
申请日：2013-02-25
Applicant: JFE STEEL CORPORATION
Inventor： Hiroyuki Masuoka , Reiko Sugihara , Takashi Kawano
IPC: C21D1/26 , C23G1/08 , C21D9/46 , C22C38/04 , C22C38/58 , C22C38/02 , C22C38/06 , C21D6/00 , C21D8/02 , C23F17/00 , B62D29/00
Abstract: A Si-containing high-strength cold rolled steel sheet has a chemical composition comprising C: 0.02˜0.3 mass %, Si: 0.8˜2.0 mass %, Mn: 1.0˜5.0 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.
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Patent Agency Ranking
公开(公告)号：US12195868B2
公开(公告)日：2025-01-14
申请号：US18256968
申请日：2021-11-29
Applicant: JFE STEEL CORPORATION
Inventor： Takashi Ueno , Yoichiro Yamanaka , Yoshitsugu Suzuki , Masanari Tomozawa , Haruo Nakamichi , Takashi Kawano
Abstract: It is provided a surface-treated steel sheet that can be produced without using hexavalent chromium and has excellent film wet adhesion and coating secondary adhesion as well as high film corrosion resistance and coating corrosion resistance. It is a surface-treated steel sheet having: a steel sheet; a metallic Cr layer disposed on at least one surface of the steel sheet; and a Cr oxide layer disposed on the metallic Cr layer, and the surface-treated steel sheet has a water contact angle of 50° or less and a total atomic ratio of K, Na, Mg, and Ca adsorbed on the surface to Cr of 5% or less.
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公开(公告)号：US09352393B2
公开(公告)日：2016-05-31
申请号：US14650092
申请日：2013-12-24
Applicant: JFE STEEL CORPORATION
Inventor： Tomoshige Ono , Yukiko Ozaki , Takashi Kawano
CPC classification number: B22F1/0011 , B22F1/0059 , B22F1/0062 , B22F1/02 , B22F1/025 , C22C33/0207 , Y10T428/2991
Abstract: An iron-based powder for powder metallurgy effectively prevents agglomeration of a lubricant, has excellent flowability, can evenly fill thin-walled cavities, keeps the ejection force after formation low, and does not lower sintered body strength by adhering either or both of an alloy component and a cutting ability improving agent to the surface of iron powder with a binder that has a melting point of 150° C. or lower, adhering carbon black to the surface of the binder, and setting the amount of free binder to 0.02 mass % or less.
Abstract translation: 用于粉末冶金的铁基粉末有效地防止了润滑剂的团聚，具有优异的流动性，可以均匀地填充薄壁空腔，使形成后的喷射力保持不变，并且通过粘合合金中的任一种或两者不降低烧结体的强度 组合物和切割能力改进剂加入到具有熔点为150℃或更低的粘合剂的铁粉表面上，将炭黑粘合到粘合剂的表面，并将游离粘合剂的量设定为0.02质量％ 或更少。
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公开(公告)号：US20150013849A1
公开(公告)日：2015-01-15
申请号：US14376916
申请日：2013-02-08
Applicant: JFE Steel Corporation
Inventor： Seiji Okabe , Shigehiro Takajo , Takashi Kawano
CPC classification number: H01F1/16 , C21D1/38 , C21D8/12 , C21D8/125 , C21D2201/05 , C22C38/00 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/60
Abstract: A grain-oriented electrical steel sheet produces reduced noise when worked into a transformer, by setting length d of each plastic strain region in the widthwise direction of the steel sheet to 0.05 mm or more and 0.4 mm or less, and a ratio (Σd/Σw) of a total Σd of the length d to a total Σw of application interval w of each of the above plastic strain regions to 0.2 or more and 0.6 or less.
Abstract translation: 通过将钢板宽度方向上的每个塑性应变区域的长度d设定为0.05mm以上且0.4mm以下，并且将（＆Sgr; 长度d的总和＆lt; sgr; d的总和＆lt; S＆gt; w，将上述每个塑性应变区域的施加间隔w的总和Sgr w分别设定为0.2以上且0.6以下。
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7.发明申请SI-CONTAINING HIGH-STRENGTH COLD ROLLED STEEL SHEET, METHOD OF PRODUCING THE SAME, AND AUTOMOTIVE MEMBERS (AS AMENDED) 审中-公开含SI的高强度冷轧钢板，其生产方法和汽车成员（如修改）公开(公告)号：US20150027600A1
公开(公告)日：2015-01-29
申请号：US14379968
申请日：2013-02-25
Applicant: JFE STEEL CORPORATION
Inventor： Hiroyuki Masuoka , Reiko Sugihara , Takashi Kawano
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: 0.0˜20.3 mass %, Si: 0.8˜2.0 mass %, Mn: 1.0˜5.0 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的高强度冷轧钢板具有C：0.0〜0.20质量％，Si：0.8〜2.0质量％，Mn：1.0〜5.0质量％的化学组成，余量为Fe和不可避免的杂质，比例 的Si含量相对于Mn含量（Si / Mn）超过0.4的拉伸强度TS为780MPa以上，钢板表面的金属组织含有多晶铁素体和/或不具有Si浓度的贝氏体铁素体 大于3.0质量％，粒径不大于10μm，在钢板表面上不含有含Si氧化物层。
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公开(公告)号：US12195858B2
公开(公告)日：2025-01-14
申请号：US18256988
申请日：2021-11-29
Applicant: JFE STEEL CORPORATION
Inventor： Takashi Ueno , Yoichiro Yamanaka , Yoshitsugu Suzuki , Masanari Tomozawa , Haruo Nakamichi , Takashi Kawano
Abstract: It is provided a surface-treated steel sheet that can be produced without using hexavalent chromium and has excellent sulfide staining resistance and coating secondary adhesion. It is a surface-treated steel sheet having: a Sn plating layer; a metallic Cr layer disposed on the Sn plating layer; and a Cr oxide layer disposed on the metallic Cr layer, on at least one surface of a steel sheet, and the surface-treated steel sheet has a water contact angle of 50° or less and a total atomic ratio of K, Na, Mg, and Ca adsorbed on the surface to Cr of 5% or less.
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