Tungsten Carbide Powder

Patent metadata

Field	Value
Publication number	US-2020346935-A1
Application number	US-201716341624-A
Country	US
Kind code	A1
Filing date	Oct 12, 2017
Priority date	Oct 13, 2016
Publication date	Nov 5, 2020
Grant date	—

Abstract

Provided is a tungsten carbide powder satisfying such a condition that when the Fsss particle size thereof is represented by a (μm) and the BET particle size thereof converted from the BET specific surface area is represented by b (μm), a is 0.40 μm or more and 1.50 μm or less, and b/a is 0.17 or more and 0.35 or less.

First claim

1 . A tungsten carbide powder satisfying such a condition that when the Fsss particle size thereof is represented by a (μm) and the BET particle size thereof converted from the BET specific surface area is represented by b (μm), a is 0.40 μm or more and 1.50 μm or less, and b/a is 0.17 or more and 0.35 or less, and the taped volume (cm 3 /100 g) is represented by y, y=−5.97a+z (z=22.56 or less).

2 . (canceled)

3 . The tungsten carbide powder according to claim 1 , wherein the Fsss particle size a (μm) is 0.40 μm or more and 1.00 μm or less.

4 . The tungsten carbide powder according to claim 1 , wherein when the tungsten carbide powder is pressed at a pressure of 98 MPa and molded into a press-molded body, and the density (g/cm 3 ) of the press-molded body is represented by p, p=1.86a+q (q=6.8 or more).

Assignees

• Almt Corp

Inventors

• Hayashi Takehiko
• Ishida Tomoyuki
• Yamakawa Takahiro

Classifications

• C01P2006/12

  Surface area · CPC title

• C01P2006/10

  Solid density · CPC title

• C01P2004/62

  Submicrometer sized, i.e. from 0.1-1 micrometer · CPC title

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• C01B32/949 Primary

  Tungsten or molybdenum carbides · CPC title