Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Metal and nonmetal in final product
Patent
1987-09-03
1988-05-10
Lechert, Jr., Stephen J.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Metal and nonmetal in final product
419 23, 419 26, 419 29, 419 38, 419 44, 419 47, 419 54, 419 57, 419 58, 419 60, 75242, 75238, 75246, B22F 100
Patent
active
047434252
ABSTRACT:
A method of producing ferrous sintered alloys comprises the steps of preparing mixed alloy powder containing Fe-P-C eutectic alloy powder which includes phosphorus within the range of 2.0% to 3.0% by weight, carbon not more than 4.0% by weight and one of molybdenum within the range of 8.0% to 11.0% by weight and boron within the range of 0.5% to 3.0% by weight, graphite, and ferroalloy powder containing chromium within the range of 11% to 14% by weight; causing the mixed alloy powder to be subjected to compression molding to have a green compact; and sintering the green compact to have a ferrous sintered alloy containing compound carbides in a matrix structure thereof. The graphite is so selected that the sum total of the graphite and the carbon included in the Fe-P-C eutectic alloy powder constitutes a part within the range of 5% to 8% by weight of the sum total of the graphite and the Fe-P-C eutectic alloy powder. Further, the ferroalloy powder is so selected as to constitute a part within the range of 30% to 70% by weight of the whole mixed alloy powder.
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Kamino Sumio
Nitta Minoru
Ohsaki Shigemi
Ferguson Jr. Gerald J.
Foycik, Jr. Michael J.
Hoffman Michael P.
Kawasaki Steel Corp.
Lechert Jr. Stephen J.
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