US Government As Represented by the Secretary of the Army

John J Pittari, Iii

Kristopher Allen Darling

Heather Ann Murdoch

Billy C Hornbuckle

Jeffrey J Swab

Steven M Kilczewski

Robert J Dowding

A sintered cemented carbide body including tungsten carbide, and a substantially cobalt-free binder including an iron-based alloy sintered with the tungsten carbide. The iron-based alloy is approximately 2-25% of the overall weight percentage of the sintered tungsten carbide and iron-based alloy. The tungsten carbide may be approximately 90 wt % and the iron-based alloy may be approximately 10 wt % of the overall weight percentage of the sintered tungsten carbide and iron-based alloy. The tungsten carbide may comprise a substantially same size before and after undergoing sintering. The iron-based alloy may be sintered with the tungsten carbide using a uniaxial hot pressing process, a spark plasma sintering process, or a pressureless sintering process. The sintered tungsten carbide and iron-based alloy has a hardness value of at least 15 GPa and a fracture toughness value of at least 11 MPa&#x221a;m.

Cemented carbide containing tungsten carbide and fine grained iron alloy binder

Cemented carbide containing tungsten carbide and finegrained iron alloy binder

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Nottingham, MD, United States of America

John J Pittari, Iii