Sintered tungsten alloy

Abstract

There is provided a flat plate-like sintered tungsten alloy that can be molded into a complex shape by press working or forge processing. The flat plate-like sintered tungsten alloy contains 85% by mass or more and 98% by mass or less of W, 1.4% by mass or more and 11% by mass or less of Ni, and 0.6% by mass or more and 6% by mass or less of at least one substance selected from the group consisting of Fe, Cu and Co, wherein an elongation percentage of the flat plate-like sintered tungsten alloy in a planar direction is 20% or more.

1 - 3 . (canceled) 
     
     
         4 . A flat plate-like sintered tungsten alloy, containing 85% by mass or more and 98% by mass or less of tungsten, 1.4% by mass or more and 11% by mass or less of nickel, and 0.6% by mass or more and 6% by mass or less of at least one substance selected from the group consisting of iron, copper and cobalt, wherein
 an elongation percentage of the flat plate-like sintered tungsten alloy in a planar direction is 20% or more; and   an X-ray diffraction intensity ratio of a (111) plane of a Ni—(Fe, Cu, Co) phase in a flat plate surface of the flat plate-like sintered tungsten alloy (assuming that X-ray diffraction intensities of the (111) plane, a (100) plane, a (110) plane, and a (311) plane are I(111), I(100), I(110), and I(311), respectively, the X-ray diffraction intensity ratio of the (111) plane is a value of [I(111)/{I(111)+I(100)+I(110)+I(311)}]) is 0.68 or more and 0.9 or less.   
     
     
         5 . The sintered tungsten alloy according to  claim 4 , wherein a thickness of the flat plate-like sintered tungsten alloy is 1.5 mm or smaller.