公开(公告)号：US20230227951A1

公开(公告)日：2023-07-20

申请号：US17925071

申请日：2021-05-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomohiro KANAZAWA ,  Naoki KOHYAMA ,  Kenshi TSUJI ,  Yoshihiro IGUCHI ,  Yui NAKAI ,  Tetsuya NAKAAZE

IPC: C22C27/04 ,  C22C1/04 ,  C22F1/18

CPC classification number: C22C27/04 ,  C22C1/045 ,  C22F1/18 ,  C25F3/26

Abstract: A tungsten wire that contains tungsten or a tungsten alloy is provided. An average width of surface crystal grains in a direction perpendicular to an axis of the tungsten wire is at most 98 nm. The tungsten wire has a tensile strength of at least 3900 MPa. The tungsten wire has a diameter of at least 100 μm and at most 225 μm.

公开(公告)号：US20220098708A1

公开(公告)日：2022-03-31

申请号：US17414442

申请日：2019-11-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomohiro KANAZAWA ,  Yoshihiro IGUCHI ,  Naoki KOHYAMA ,  Atsushi SHIMADA ,  Kenshi TSUJI ,  Yui NAKAI

IPC: C22C27/04 ,  C22F1/18 ,  B21C1/00 ,  B21C9/00

Abstract: A tungsten wire contains tungsten or a tungsten alloy. An average width of surface crystal grains in a direction perpendicular to an axis of the tungsten wire is at most 76 nm. The tungsten wire has a tensile of at least 4800 MPa, and a diameter of at most 100 μm.

公开(公告)号：US20220220591A1

公开(公告)日：2022-07-14

申请号：US17604859

申请日：2020-04-13

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomohiro KANAZAWA ,  Naoki KOHYAMA ,  Yoshihiro IGUCHI ,  Yui NAKAI

IPC: C22C27/04 ,  C22F1/18 ,  B21C1/02 ,  A61L31/02 ,  A61L31/14

Abstract: A tungsten wire is a tungsten wire containing tungsten or a tungsten alloy, a diameter of the tungsten wire is at most 100 μm, and a total number of torsional rotations to breakage per length of 50 mm of the tungsten wire (10) is greater than or equal to 250×exp(−0.026×D) when a tension that is 50% of a breakage tension of the tungsten wire is applied as a load, D denoting the diameter of the tungsten wire.

公开(公告)号：US20190232404A1

公开(公告)日：2019-08-01

申请号：US16256636

申请日：2019-01-24

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Tomohiro KANAZAWA ,  Naoki KOHYAMA ,  Yoshihiro IGUCHI ,  Yuuki SASAGAWA ,  Tetsuji SHIBATA ,  Toshiyuki TANI

IPC: B23D61/18 ,  B28D5/04 ,  B23D57/00 ,  B24B27/06 ,  C25D15/02 ,  C22C38/12

CPC classification number: B23D61/185 ,  B23D57/0007 ,  B24B27/0633 ,  B28D5/045 ,  C22C38/12 ,  C25D15/02

Abstract: A metal wire containing tungsten is provided. A tungsten content of the metal wire is at least 90 wt %. A tensile strength of the metal wire is at least 4000 MPa. An elastic modulus of the metal wire is at least 350 GPa and at most 450 GPa. A diameter of the metal wire is at most 60 μm. An average crystal grain size of the metal wire in a cross-section orthogonal to an axis of the metal wire is at most 0.20 μm.