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    HOT-PRESSED MEMBER AND PROCESS FOR PRODUCING SAME
    52.
    发明专利
    HOT-PRESSED MEMBER AND PROCESS FOR PRODUCING SAME 未知

    公开(公告)号：CA2778763A1

    公开(公告)日：2011-05-05

    申请号：CA2778763

    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

    Abstract: Disclosed is a hot-pressed member which comprises: a steel sheet that constitutes the member and that has a surface layer in which an Ni diffusion region is present; an intermetallic-compound layer formed on the Ni diffusion region, the intermetallic-compound layer corresponding to the ? phase present in a phase equilibrium diagram of a Zn-Ni alloy; and a ZnO layer formed on the intermetallic-compound layer. The hot-pressed member has a spontaneous potential, when immersed in 0.5-M aqueous NaCl solution saturated with air and having a temperature of 25±5°C, of -600 to -360 mV relative to the standard hydrogen electrode. This hot-pressed member can be produced without generating any scale. The member has excellent adhesion to coatings and has excellent corrosion resistance after coating. The member can be inhibited from corroding and thereby suffering hydrogen penetration into the steel.

    METHOD FOR PRODUCING HOT-PRESSED MEMBER
    54.
    发明公开
    METHOD FOR PRODUCING HOT-PRESSED MEMBER 审中-公开

    公开(公告)号：EP3330016A4

    公开(公告)日：2018-06-27

    申请号：EP16830013

    申请日：2016-07-05

    Applicant: JFE STEEL CORP

    Inventor： NAKAJIMA SEIJI ,  ANDO SATORU

    IPC: B21D22/20 ,  B21D22/26 ,  C21D8/02 ,  C21D9/46 ,  C23C2/06 ,  C23C2/26 ,  C23C2/40 ,  C25D5/26 ,  C25D5/48

    CPC classification number: B21D22/20 ,  B21D22/26 ,  C21D8/0278 ,  C21D9/46 ,  C23C2/06 ,  C23C2/26 ,  C23C2/40 ,  C25D5/48

    Abstract: Provided is a method for manufacturing a hot-pressed member excellent in terms of surface appearance with which it is possible to stably manufacture a hot-pressed member having a homogeneous and good surface appearance without causing a significant increase in cost. A method for manufacturing a hot-pressed member includes heating a zinc-based coated steel sheet to a temperature range from the Ac3 transformation temperature to 1000°C, performing hot pressing work, and performing cooling, in which a surface-cleaning treatment is performed on the zinc-based coated steel sheet before the heating is performed. A method for manufacturing a hot-pressed member includes performing cold pressing work on a zinc-based coated steel sheet, heating the zinc-based coated steel sheet to a temperature range from the Ac3 transformation temperature to 1000°C, and cooling the heated steel sheet, in which a surface-cleaning treatment is performed on the zinc-based coated steel sheet before the heating is performed. It is preferable that the zinc-based coated steel sheet be a Zn-Ni-alloy-coated steel sheet having a coating layer on one or both sides of the Zn-Ni-alloy-coated steel sheet, and the coating layer have a chemical composition containing 10 mass% to 25 mass% of Ni and the balance being Zn and inevitable impurities and a coating weight per side of 10 g/m 2 to 90 g/m 2 .

    Hot-pressed member and method for manufacturing the same
    60.
    发明专利
    Hot-pressed member and method for manufacturing the same 有权
    热压构件及其制造方法

    公开(公告)号：JP2011117036A

    公开(公告)日：2011-06-16

    申请号：JP2009275412

    申请日：2009-12-03

    Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

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

    IPC: C23C2/06 ,  B21D22/20

    Abstract: PROBLEM TO BE SOLVED: To provide a hot-pressed member capable of reliably obtaining excellent coating adhesiveness, and a method for manufacturing the same.
    SOLUTION: The hot-pressed member has a Zn-Fe alloy layer, a Si-containing layer, and a ZnO layer in this order on the surface of a steel sheet constituting the member. In the method for manufacturing the same, a hot-dip galvannealed steel sheet having an Si-containing compound layer on its surface is heated at the temperature of 800-1,000°C for the time >3 minutes and ≤15 minutes to execute the hot press. Zn in a plating layer and Fe in the steel sheet are subjected to mutual diffusion in an interface between the plating layer and the base steel sheet, and a Zn-Fe alloy layer is formed thereby. Zn in the upper layer portion of the plating layer passes through the Si-containing compound layer and diffused to the surface, and is reacted with O in the atmosphere to form a ZnO layer on the Si-containing compound layer.
    COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题：提供一种能够可靠地获得优异的涂料粘合性的热压部件及其制造方法。 解决方案：热压构件在构成构件的钢板的表面上依次具有Zn-Fe合金层，含Si层和ZnO层。 在其制造方法中，将表面具有含Si化合物层的热浸镀锌合金化钢板在800〜1000℃的温度下加热3分钟以上≤15分钟，进行热处理 按。 镀层中的Zn和钢板中的Fe在镀层和基体钢板之间的界面上相互扩散，由此形成Zn-Fe合金层。 镀层的上层部分的Zn通过含Si化合物层并扩散到表面，并与大气中的O反应，在含Si化合物层上形成ZnO层。 版权所有（C）2011，JPO＆INPIT

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