Tungsten wire, saw wire, and tungsten wire for screen printing
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsTomohiro Kanazawa, Naoki Kohyama, Kenshi Tsuji, Yoshihiro Iguchi, Yui Nakai, Tetsuya Nakaaze
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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.
Claims4
A tungsten wire containing tungsten or a tungsten alloy, wherein
- an average width of surface crystal grains in a direction perpendicular to an axis of the tungsten wire is at most 98 nm,
- a tensile strength of the tungsten wire is at least 3900 MPa, and
- a diameter of the tungsten wire is larger than 100 μm and at most 225 μm, and
- a tungsten content of the tungsten wire is at least 99 wt %.
A tungsten wire containing tungsten or a tungsten alloy, wherein
- an average width of surface crystal grains in a direction perpendicular to an axis of the tungsten wire is at most 98 nm,
- a tensile strength of the tungsten wire is at least 3900 MPa,
- a diameter of the tungsten wire is at least 18 μm and at most 225 μm, and
- T≥4758×D2−7258.3×D+5275.5 is satisfied where T is the tensile strength in MPa and D is the diameter in mm.
A saw wire comprising a tungsten wire containing tungsten or a tungsten alloy, wherein
- an average width of surface crystal grains in a direction perpendicular to an axis of the tungsten wire is at most 98 nm,
- a tensile strength of the tungsten wire is at least 3900 MPa, and
- a diameter of the tungsten wire is larger than 100 μm and at most 225 μm.
Dependencies are inferred from the claim text.