公开(公告)号：US20230002867A1

公开(公告)日：2023-01-05

申请号：US17781617

申请日：2020-12-04

Applicant: Panasonic Intellectual Property Management Co., Ltd.

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

IPC: C22C27/04

Abstract: 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：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.