Low binder, wear resistant hard metal

Patent metadata

Field	Value
Publication number	US-9624417-B2
Application number	US-201314434156-A
Country	US
Kind code	B2
Filing date	Oct 9, 2013
Priority date	Oct 9, 2012
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

The invention is a low binder, wear resistant material including, in weight percent of raw materials, from 15% to 20% of molybdenum carbide added in either elemental or compound form, an alloy of 0.9% to 3% cobalt, nickel or a combination of cobalt and nickel, of 0 to 0.1% of chromium carbide, optionally also titanium carbide or titanium tungsten carbide and the balance of tungsten carbide.

First claim

What is claimed is:

1. A method of making a low binder, wear resistant material comprising the steps of
providing from about 15 to of about 20% of molybdenum carbide added in either individual molybdenum and carbon elemental or compound form, providing about 0.9 to of about 3% of cobalt, nickel or a combination of cobalt and nickel, providing 0 to of about 0.1% of chromium carbide, and providing the balance of tungsten carbide to form a powder blend;
milling the powder blend;
drying the powder blend;
sieving the powder blend;
pressing the powder blend; and
sintering the powder blend at a temperature of from about 1450° C. under a pressure of about 50 bar in an argon atmosphere.

2. The method of claim 1 , further comprising the step of providing titanium carbide.

3. The method of claim 1 , further comprising the step of providing titanium tungsten carbide.

4. The method of claim 1 , further comprising the step of providing about 20% molybdenum and about 1.8% cobalt.

5. The method of claim 1 , further comprising the step of providing about 20% molybdenum and about 1.8% nickel.

6. The method of claim 1 , further comprising the step of providing about 0.1% chromium carbide.

Assignees

• Sandvik Intellectual Property

Inventors

• Hirsch Alexander
• Meilland Annabelle
• Ederyd Stefan
• Fumaroli Marion
• Gerharson Ylva

Classifications

• C04B35/5626

  based on tungsten carbides · CPC title

• C04B2235/422

  Carbon · CPC title

• C09K5/14 Primary

  Solid materials, e.g. powdery or granular · CPC title

• C04B2235/96

  Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance · CPC title

• C04B2235/785

  Submicron sized grains, i.e. from 0,1 to 1 micron · CPC title