公开(公告)号：US11761065B2

公开(公告)日：2023-09-19

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 ,  A61L31/02 ,  A61L31/14 ,  B21C1/02 ,  C22F1/18

CPC classification number: C22C27/04 ,  A61L31/022 ,  A61L31/14 ,  B21C1/02 ,  C22F1/18 ,  Y10T428/12431

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 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：US10967447B2

公开(公告)日：2021-04-06

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 ,  B23D65/00 ,  B23D57/00 ,  B28D5/04 ,  C22C38/12 ,  C22C27/04 ,  B24B27/06 ,  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.