公开(公告)号：US12134153B2

公开(公告)日：2024-11-05

申请号：US16311268

申请日：2017-06-19

Applicant: Kobe Steel, Ltd. ,  JFE Steel Corporation

Inventor： Minoru Miyata ,  Reiichi Suzuki ,  Hiroshi Matsuda ,  Rinsei Ikeda ,  Sachiko Suzuki ,  Satoru Ando

IPC: B23K9/173 ,  B23K9/025 ,  B23K9/23 ,  B23K35/30 ,  B23K35/32 ,  B23K35/38

Abstract: A gas-shielded arc welding method includes welding a steel plate having a tensile strength of 780 MPa or more while feeding a consumable electrode via a welding torch and flowing a shielding gas. The consumable electrode includes, in mass %, C: 0 to 0.20%, Si: 0 to 0.50%, Mn: 0 to 0.50%, Cr: 1.00% to 9.00%, S: 0.0020% to 0.0600%, and Ni: 0 to 0.50%. The shielding gas includes, in vol. %, at least one of CO2 and O2: 1% to 15% in total, with the remainder being Ar and unavoidable impurities. Welding is performed under the condition satisfying the relationship of 1≤{−0.05×[CO2+O2]}+[Cr]≤8.3, and [Cr] represents the content of Cr in the consumable electrode, and [CO2+O2] represents a total content of at least one of CO2 and O2 in the shielding gas.

公开(公告)号：US10384254B2

公开(公告)日：2019-08-20

申请号：US14901754

申请日：2014-06-02

Applicant: JFE Steel Corporation

Inventor： Seiji Nakajima ,  Minako Morimoto ,  Satoru Ando

IPC: C22C38/60 ,  B21D22/20 ,  C21D1/18 ,  C21D1/673 ,  C21D9/46 ,  C22C18/00 ,  C22C19/03 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/28 ,  C22C38/32 ,  C25D5/14 ,  C25D5/50 ,  C25D7/06 ,  B32B15/01

Abstract: A method of manufacturing a hot-pressed member including heating a coated steel sheet to 850° C. to 950° C., the coated steel sheet including a substrate steel sheet and a coating layer formed on the substrate steel sheet and containing 10% to 25% by mass of Ni and the balance being Zn and incidental impurities, in which the coating weight of the coating layer is 10 to 90 g/m2 per a side; and starting hot press forming when the temperature of the coated steel sheet which has been heated is 650° C. to 800° C.

公开(公告)号：US10093077B2

公开(公告)日：2018-10-09

申请号：US14901147

申请日：2014-05-13

Applicant: JFE STEEL CORPORATION

Inventor： Seiji Nakajima ,  Minako Morimoto ,  Satoru Ando

IPC: B32B15/18 ,  B32B15/01 ,  C21D7/13 ,  C21D1/673 ,  C25D5/14 ,  C25D5/50 ,  C25D7/06 ,  C22C18/00 ,  C22C19/03 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C22C38/60 ,  C21D1/00 ,  C25D3/12 ,  C25D3/56

Abstract: A steel sheet for hot press-forming having a first coating layer on a surface of the steel sheet, containing 60% or more by mass Ni and a remainder composed of Zn and incidental impurities, a coating mass thereof being more than 5 g/m2 and 50 g/m2 or less per side, and a second coating layer on the first coating layer, containing 10% to 25% by mass Ni and a remainder composed of Zn and incidental impurities, a coating mass thereof being 10 to 90 g/m2 per side.

公开(公告)号：US20160047018A1

公开(公告)日：2016-02-18

申请号：US14779748

申请日：2014-03-19

Applicant: JFE STEEL CORPORATION

Inventor： Minako Morimoto ,  Masahiro Yoshida ,  Satoru Ando

IPC: C22C21/10 ,  B32B15/01

CPC classification number: C22C21/10 ,  B32B15/012 ,  C23C2/02 ,  C23C2/12 ,  C23C2/26 ,  C23C2/405 ,  C23C28/021

Abstract: An Al—Zn-coated steel sheet that suppresses blistering and offers good corrosion resistance after painting is provided. The Al—Zn-coated steel sheet includes an Al—Zn coating layer on a steel sheet surface, the Al—Zn coating layer including two layers which are an interfacial alloy layer present in an interface with a base steel sheet and an upper layer disposed on the interfacial alloy layer. The upper layer contains compounds of Si and Ca or Si, Ca, and Al, and Ca/Si mass % ratio in the upper layer is 0.72 to 1.4. The interfacial alloy layer contains an Fe—Al compound and/or an Fe—Al—Si compound. In the upper layer, Si content is 0.1 to 2.0 mass % and Ca content is 0.001 to 2.0 mass %.

Abstract translation: 提供一种抑制起泡并提供涂漆后耐腐蚀性的Al-Zn涂层钢板。 所述Al-Zn系镀覆钢板在钢板表面上具有Al-Zn被覆层，所述Al-Zn被覆层包含与基材钢板的界面上存在的界面合金层和设置在上层的界面合金层 在界面合金层上。 上层含有Si和Ca或Si，Ca和Al的化合物，上层的Ca / Si质量％比为0.72〜1.4。 界面合金层含有Fe-Al化合物和/或Fe-Al-Si化合物。 在上层中，Si含量为0.1〜2.0质量％，Ca含量为0.001〜2.0质量％。

公开(公告)号：US20140377583A1

公开(公告)日：2014-12-25

申请号：US14364357

申请日：2012-12-10

Applicant: JFE Steel Corporation ,  Tokyo Institute of Technology

Inventor： Tooru Tsuru ,  Toshio Maruyama ,  Tatsuo Sato ,  Masao Takeyama ,  Masahiro Yoshida ,  Sakae Fujita ,  Sachiko Suzuki ,  Satoru Ando ,  Hiroki Nakamaru

IPC: C23C2/12

CPC classification number: C23C2/12 ,  C21D1/673 ,  C21D8/0473 ,  C21D8/0478 ,  C21D2211/004 ,  C22C21/06 ,  C23C2/28 ,  Y10T428/12757

Abstract: An aluminum or aluminum alloy-coated steel material includes base steel; and a coating layer formed on a surface of the base steel and containing by mass % Mg: 6% to 10%, Si: 3% to 7%, Fe: 0.2% to 2%, Mn: 0.02% to 2%, and the balance as Al and incidental impurities, where-in the coating layer has pseudoternary eutectic microstructures of αAl—Mg2Si—(Al—Fe—Si—Mn) and an area ratio of the pseudoternary eutectic microstructures in the coating layer is at least 30%.

Abstract translation: 铝或铝合金涂层钢材包括基体钢; 以及以质量％Mg：6〜10％，Si：3〜7％，Fe：0.2〜2％，Mn：0.02〜2％的比例含有的涂层， 作为Al和偶然杂质的平衡，其中在涂层中具有αAl-Mg 2 Si-（Al-Fe-Si-Mn）的假三元共晶微结构和涂层中的假三元共晶微结构的面积比至少为30％ 。