Aluminum hardened copper alloy
AssigneeFord Motor Company
InventorsUck I. Chang, Chia-Ming Yen
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Abstract
A high temperature wear resistant material is disclosed for use in engine components such as an exhaust valve seat insert to reduce high temperature exhaust valve seat wear. The material consists by weight of about 40-70% Cu, about 20-60% Ni, about 3-14% Al and up to about 1.5% other alloying ingredients with normal processing impurities.
Claims8
An as-alloyed annular high temperature wear resistant exhaust valve seat insert for use in an internal combustion engine, said insert consisting of about 40-70% Cu, about 20-60% Ni, about 3-14% and up to about 1.5% other metallic alloying ingredients with the normal processing impurities, said insert having a hardness in the range of 25-40 R.sub.c when experiencing temperatures of 800.degree.-900.degree. F.
An exhaust valve seat insert for use in an internal combustion engine, said engine having an exhaust port with walls defining an annular grooved mouth, said insert comprising a machinable annular member integrated in and to said grooved mouth, said member consisting of an as-alloyed material forming about 57-64% Cu, about 26-51% Ni, about 7-12% Al, and up to about 1.5% other alloying ingredients with the normal processing impurities.
An engine valve assembly comprising an exhaust valve consisting of iron based alloy and a valve seat facing material consisting essentially of about 40-70% copper, about 20-60% nickel and about 3-14% aluminum, said alloy being laser heated to provide high temperature resistant intermetallic compounds.
Dependencies are inferred from the claim text.