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US 12,473,614 B2Granted
Tungsten wire and saw wire
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsTomohiro Kanazawa, Yoshihiro Iguchi, Naoki Kohyama, Atsushi Shimada, Kenshi Tsuji, Yui Nakai
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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.
Claims5
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 76 nm,
- a tensile strength of the tungsten wire is greater than 5000 MPa, and
- a diameter of the tungsten wire is at most 100 μm.
A tungsten wire containing tungsten or a tungsten alloy,
- wherein an average crystal grain size in a cross section perpendicular to an axis of the tungsten wire is at most 0.16 μm,
- the average crystal grain size in the cross section is smaller in a periphery portion than in a center portion by at least 5%, the periphery portion being outside the center portion in the cross section,
- a tensile strength of the tungsten wire is greater than 5000 MPa, and
- a diameter of the tungsten wire is at most 100 μm.
1 more element
Dependencies are inferred from the claim text.