公开(公告)号：US20200377984A1

公开(公告)日：2020-12-03

申请号：US16488826

申请日：2018-02-09

Applicant: UACJ CORPORATION ,  FURUKAWA ELECTRIC CO., LTD.

Inventor： Kotaro KITAWAKI ,  Takuya MURATA ,  Makoto YONEMITSU ,  Kouichiro TAKIGUCHI ,  Takashi NAKAYAMA ,  Kimie IMAKAWA ,  Yasuo FUJII ,  Hideyuki HATAKEYAMA

IPC: C22F1/04 ,  C22C21/00 ,  G11B5/73 ,  G11B5/858

Abstract: Provided are: an aluminum alloy substrate for a magnetic disk, including an aluminum alloy including 0.4 to 3.0 mass % of Fe with the balance of Al and unavoidable impurities; a method for producing the aluminum alloy substrate for a magnetic disk; and a magnetic disk in which an electroless Ni—P plating treatment layer and a magnetic layer formed thereon are disposed on a surface of the aluminum alloy substrate for a magnetic disk.

公开(公告)号：US20180190316A1

公开(公告)日：2018-07-05

申请号：US15570751

申请日：2016-05-23

Applicant: UACJ Corporation ,  Furukawa Electric Co., Ltd.

Inventor： Kotaro KITAWAKI ,  Takuya MURATA ,  Akira HIBINO ,  Naoki KITAMURA ,  Masanobu ONISHI ,  Hideki TAKAHASHI ,  Satoshi YAMAZAKI ,  Sadayuki TODA

IPC: G11B5/65 ,  G11B5/858 ,  C22C21/06 ,  C22F1/047

Abstract: The present invention provides: an aluminum alloy substrate for magnetic discs with excellent plating surface smoothness; a manufacturing method therefor; and a magnetic disc using said aluminum alloy substrate for magnetic discs. The present invention is an aluminum alloy substrate for magnetic discs, a manufacturing method therefor, and a magnetic disc using said aluminum alloy substrate for magnetic discs, the aluminum alloy substrate being characterized in being obtained from an aluminum alloy containing Mg: 2.0-8.0 mass % (“%” below), Be: 0.00001-0.00200%, Cu: 0.003-0.150%, Zn: 0.05-0.60%, Cr: 0.010-0.300%, Si: 0.060% or less, Fe: 0.060% or less, the balance being obtained from Al and unavoidable impurities.

公开(公告)号：US20160116234A1

公开(公告)日：2016-04-28

申请号：US14895204

申请日：2014-06-02

Applicant: UACJ Corporation

Inventor： Takashi MURASE ,  Kotaro KITAWAKI ,  Tomohito KUROSAKI ,  Junji NINOMIYA

IPC: F28F21/08 ,  F28F1/10

CPC classification number: F28F21/084 ,  B22D11/003 ,  B22D11/0622 ,  C22C21/00 ,  C22C21/02 ,  C22F1/043 ,  F28F1/10 ,  F28F1/12 ,  F28F19/06

Abstract: There is provided a heat exchanger and a fin material for the heat exchanger that can suppress occurrence of hollow corrosion in a fin and hold cooling performance for a long period of time under a high corrosion environment. The heat exchanger includes an aluminum tube through which a working fluid circulates and an aluminum fin which is bonded to the tube. The fin has a region B around a grain boundary, and a region A around the region B. In the region B, 5.0×104 pieces/mm2 less of Al—Fe—Mn—Si based intermetallic compound, each of which has equivalent circle diameters of 0.1 to 2.5 μm, are present. In the region A, 5.0×104 pieces/mm2 to 1.0×10′ pieces/mm2 of Al—Fe—Mn—Si based intermetallic compound, each of which has equivalent circle diameters of 0.1 to 2.5 μm, are present.

Abstract translation: 提供了用于热交换器的热交换器和翅片材料，其可以在高腐蚀环境下长时间地抑制翅片中的中空腐蚀的发生并保持冷却性能。 热交换器包括工作流体循环的铝管和结合到管的铝翅片。 翅片具有围绕晶界的区域B和区域B周围的区域A.在区域B中，Al x Fe-Mn-Si系金属间化合物的5.0×104个/ mm 2以下具有相同的圆 存在0.1〜2.5μm的直径。 在区域A中，存在Al x Fe-Mn-Si系金属间化合物的5.0×10 4个/ mm 2〜1.0×10 6个/ mm 2，各自具有0.1〜2.5μm的当量圆直径。