Kennametal Inc.
WEAR RESISTANT ARTICLES AND APPLICATIONS THEREOF

Abstract:

Wear resistant articles are described herein which, in some embodiments, mitigate CTE differences between wear resistant components and metallic substrates. In one aspect, an article comprises a layer of sintered cemented carbide bonded to a layer of iron-based alloy via a metal-matrix composite bonding layer, wherein coefficients of thermal expansion (CTE) of the sintered cemented carbide layer, metal matrix composite bonding layer, and iron-based alloy layer satisfy the relation: x = ( C T E WC - C T E M M C ) ( C T E M M C - C T E Fe ) ##EQU00001## wherein 0.5.ltoreq.x.ltoreq.2 and CTE WC, CTE MMC and CTE Fe are the CTE values for the sintered cemented carbide, metal matrix composite, and iron-based alloy in 1/K respectively at 900.degree. C. to 1100.degree. C.