公开(公告)号：US20230002867A1

公开(公告)日：2023-01-05

申请号：US17781617

申请日：2020-12-04

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： Akitoshi KASAHARA ,  Naoki KOHYAMA ,  Tomohiro KANAZAWA ,  Kenshi TSUJI ,  Yoshiyuki KITA ,  Atsushi SHIMADA ,  Yuuki SASAGAWA

IPC分类号： C22C27/04

摘要： A metal wire, which is one of a tungsten wire and a tungsten alloy wire, includes alkali metal on the surface thereof. The amount of alkali metal is at most 2.0 μg per 1 g of the metal 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

申请人： PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

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

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

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

摘要： 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.