Tungsten carbide hardfacing powders and compositions thereof for

Details Tungsten carbide hardfacing powders and compositions thereof for Tungsten carbide hardfacing powders and compositions thereof for

1989-06-29

1990-05-08

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Loose particulate mixture containing metal particles

75240, 75242, C22C 2906

Patent

active

049235117

ABSTRACT:
Disclosed is a hardfacing powder to be deposited by plasma-transferred-arc welding on a substrate so as to provide a facing of super-hard material that can be utilized as a wear resistant surface. Particular examples of use include mining, agricultural, construction, railroad and plastic extrusion molding equipment.
The hardfacing powder of the present invention includes a plurality of different types of tungsten carbide, particularly W.sub.2 C and WC-Co, within a matrix alloy of carbon 0.017-0.52% by weight, silicon 4.3-4.7% by weight, boron 2.7-3.3% by weight, iron 0.27-0.40% by weight and the balance nickel. The total content of tungsten carbide is at least 50% of the total powder by weight.
The result is a facing that is improved in compression as well as shear impact resistance that lasts longer in use and has a lower manufacturing cost than conventional hardened metals.

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