公开(公告)号：US11355258B2

公开(公告)日：2022-06-07

申请号：US16681534

申请日：2019-11-12

Applicant: Hitachi Metals, Ltd.

Inventor： Toru Sumi ,  Kazuya Nishi ,  Shohei Hata ,  Takashi Hayasaka ,  Takeshi Usami

IPC: H01B1/02 ,  C22F1/04 ,  C22F1/00 ,  C22C21/00

Abstract: A wire rod made of an aluminum alloy. The aluminum alloy includes Al crystal grains, an Al—Zr compound, and an Al—Co—Fe or Al—Ni—Fe compound. The aluminum alloy includes high-angle tilt crystal grain boundaries, each of which has a difference between crystal orientations in both its sides of 15 degrees or more, and low-angle tilt crystal grain boundaries, each of which has a difference between crystal orientations in both its sides of 2 degrees or more and less than 15 degrees. An average grain diameter of ones of the Al crystal grains surrounded by the high-angle boundaries is 12 μm or more. An average grain diameter of the ones of the Al crystal grains surrounded by the high-angle boundaries, ones of the Al crystal grains surrounded by the high-angle boundaries and the low-angle boundaries, and ones of the Al crystal grains surrounded by the low-angle boundaries, is 10 μm or less.

公开(公告)号：US20210005342A1

公开(公告)日：2021-01-07

申请号：US16681534

申请日：2019-11-12

Applicant: Hitachi Metals, Ltd.

Inventor： Toru SUMI ,  Kazuya Nishi ,  Shohei Hata ,  Takashi Hayasaka ,  Takeshi Usami

IPC: H01B1/02 ,  C22C21/00 ,  C22F1/00 ,  C22F1/04

Abstract: A wire rod made of an aluminum alloy. The aluminum alloy includes Al crystal grains, an Al—Zr compound, and an Al—Co—Fe or Al—Ni—Fe compound. The aluminum alloy includes high-angle tilt crystal grain boundaries, each of which has a difference between crystal orientations in both its sides of 15 degrees or more, and low-angle tilt crystal grain boundaries, each of which has a difference between crystal orientations in both its sides of 2 degrees or more and less than 15 degrees. An average grain diameter of ones of the Al crystal grains surrounded by the high-angle boundaries is 12 μm or more. An average grain diameter of the ones of the Al crystal grains surrounded by the high-angle boundaries, ones of the Al crystal grains surrounded by the high-angle boundaries and the low-angle boundaries, and ones of the Al crystal grains surrounded by the low-angle boundaries, is 10 μm or less.

公开(公告)号：US11053569B2

公开(公告)日：2021-07-06

申请号：US15010780

申请日：2016-01-29

Applicant: Hitachi Metals, Ltd.

Inventor： Keisuke Fujito ,  Takashi Hayasaka ,  Takeshi Usami ,  Toru Sumi

IPC: C22C9/00 ,  C22C1/06 ,  C22C1/02 ,  B21C37/04 ,  H01B1/00 ,  B21C1/02 ,  B21C1/00

Abstract: An alloying-element additive for adding an alloy element to a copper melt formed by melting a base material including a copper in manufacturing a copper alloy. The alloying-element additive includes a wire-shaped or plate-shaped core including an alloy element, and an outer layer material including a copper and covering the core. A weight ratio of the copper in the outer layer material and the alloy element in the core is in a range of weight ratio where the alloying-element additive has a liquid phase in a temperature range of not more than a melting point of the copper in a copper-alloy element phase diagram.

公开(公告)号：US10920306B2

公开(公告)日：2021-02-16

申请号：US16191622

申请日：2018-11-15

Applicant: HITACHI METALS, LTD.

Inventor： Toru Sumi ,  Kazuya Nishi ,  Shohei Hata ,  Takashi Hayasaka ,  Takeshi Usami

IPC: C22C21/00 ,  C22F1/04 ,  H01B1/02

Abstract: An aluminum alloy wire rod has a chemical composition consisting of 0.1 to 1.0 mass % of Co, 0.2 to 0.5 mass % of Zr, 0.02 to 0.09 mass % of Fe, 0.02 to 0.09 mass % of Si, 0 to 0.2 mass % of Mg, 0 to 0.10 mass % of Ti, 0 to 0.03 mass % of B, 0 to 1.00 mass % of Cu, 0 to 0.50 mass % of Ag, 0 to 0.50 mass % of Au, 0 to 1.00 mass % of Mn, 0 to 1.00 mass % of Cr, 0 to 0.50 mass % of Hf, 0 to 0.50 mass % of V, 0 to 0.50 mass % of Sc, 0 to 0.50 mass % of Ni, the balance being Al and inevitable impurities, and a metal structure including Al crystal grains, an Al—Co—Fe compound and an Al—Zr compound. The Al crystal grains having a crystal grain diameter of 10 μm or less have an area ratio of 90% or more. The wire rod has a tensile strength of 150 MPa or more, an electrical conductivity of 55% IACS or more and when heated at 200 deg C. for 10 years, a strength of 90% or more of its initial state strength.