Panasonic Intellectual Property Management Co., Ltd.

Yoshihiro Iguchi

Tomohiro Kanazawa

Naoki Kohyama

Yui Nakai

Kenshi Tsuji

Tetsuji Shibata

Yuuki Sasagawa

Atsushi Shimada

Tetsuya Nakaaze

Toshiyuki Tani

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.

Tungsten wire and saw wire

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.

Tungsten wire, saw wire, and tungsten wire for screen printing

A tungsten wire is a tungsten wire containing tungsten or a tungsten alloy, a diameter of the tungsten wire is at most 100 &#x3bc;m, 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&#xd7;exp(&#x2212;0.026&#xd7;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.

Tungsten wire and tungsten product

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 &#x3bc;m. 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 &#x3bc;m.

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Osaka, Japan

Yoshihiro Iguchi