Wear part and method of making the same
AssigneeEsco Group LLC
InventorCharles S. Montross
Life of this patent
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Abstract
Incorporating hard particles in a matrix forming the surface of a member can significantly increase wear resistance. Hard particles can degrade when they come in contact with a molten matrix material releasing constituent elements. These elements can locally degrade the matrix material on solidification. Coating the hard particles to limit contact with the matrix material and introducing an alloying element proximate the hard particles improve retention of the particles in the matrix.
Claims20
A wear part comprising a body having an external wear surface, the body being composed of a metallic matrix material having a coated hard material and an alloying element in the matrix material along the wear surface, the alloying material limiting formation of brittle phases in the matrix material adjacent the hard material.
A method of making a wear part comprising coating hard material with at least one protective layer, locating the coated hard material and an alloying element adjacent the coated hard material in a mold, introducing a molten metallic matrix material into the mold to envelop the coated hard material and the alloying element with the alloying element limiting formation of brittle phases in the matrix material adjacent the hard material, and cooling the molten matrix to form the wear part incorporating the coated particle and alloying element.
A method of making a wear part comprising applying coated hard particles and an alloying element on or adjacent a surface of a mold, introducing a molten metal into the mold to envelop the coated hard particles and the alloying element with the alloying element dispersing into the molten metal to limit the formation of brittle phases in the metal adjacent the hard material, and cooling the molten metal to form the wear part incorporating the coated particle and alloying element.
Dependencies are inferred from the claim text.