Tungsten wire and fiber product

Abstract

A tungsten wire has a resistivity of at least 6.2 μΩ·cm and at most 6.9 μΩ·cm, and a diameter of at most 50 μm. Crystal grains of the tungsten wire include dislocation. For example, the tensile strength of the tungsten wire is at least 2200 MPa and at most 2800 MPa.

1 . A tungsten wire, the tungsten wire having:
 a resistivity of at least 6.2μΩ·cm and at most 6.9μΩ·cm; and   a diameter of at most 50 μm, wherein   crystal grains of the tungsten wire include dislocation.   
     
     
         2 . The tungsten wire according to  claim 1 , wherein
 a tensile strength of the tungsten wire is at least 2200 MPa and at most 2800 MPa.   
     
     
         3 . The tungsten wire according to  claim 1 , wherein
 an average width of surface crystal grains in a direction perpendicular to an axis of the tungsten wire is at least 220 nm.   
     
     
         4 . A fiber product comprising:
 the tungsten wire according to  claim 1 .   
     
     
         5 . The fiber product according to  claim 4 , wherein
 the fiber product is a plied yarn or a mesh.