Cobaltbased alloy Wear resistant Powder shape and size are adjustable in accordance with customer's maufacturing processes and applications.For development of wear resistance,High alloy powders are mixed with Fe-based alloy powder functioning as hard particels in the sintered metal matrix.Hiroji Henmi Inventions,Patents and Patent Applications Abstract The present invention provides a valve seat of a Co-free,sintered iron-based alloy having excellent heat resistance,oxidation resistance and wear resistance,as well as excellent machinability,which is usable for internal combustion engines using a gas fuel.The valve seat is produced by using a prealloy containing 12% or more by mass of Cr in a matrix for,and hard particles
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