Sintered powder metal friction material
AssigneeAbex Corporation
InventorHerbert W. Lloyd
Life of this patent
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Abstract
An iron-base, sintered powder metal friction material suitable for railroad braking is disclosed. The friction material comprises, by volume, 10-70% carbon; 0-2.5% sulfur; 0-10% alumina; 1-45% of a metal powder additive selected from the group consisting of copper, manganese, ferrochrome, chrome carbide compounds and mixtures thereof; and the balance iron. In preferred embodiments, the powder metal additives are 11-25% copper, or 9-15% manganese, or 5-20% ferrochrome.
Claims10
An iron-base, sintered powder metal friction material for railroad braking use formed by solid phase sintering and consisting essentially of, by volume, 10-70% carbon in the form of coke or graphite;
- 0-2.5% sulfur;
- 0-10% alumina;
- 9-40% of a metal powder additive selected from the group consisting of copper, manganese, ferrochrome, and chrome carbide compounds;
- and the balance iron.
An iron-base, sintered powder metal friction material for railroad braking use formed by solid phase sintering and consisting essentially of, by volume, 30-40% graphite;
- 0-2.5% sulfur;
- 2-8% aluminum oxide;
- 9-15% manganese, and balance iron.
An iron-base, sintered powder metal friction material for railroad braking use formed by solid phase sintering and consisting essentially of, by volume, 15-30% graphite;
- 0-2.5% sulfur;
- 5-10% aluminum oxide;
- 4-25% copper, and balance iron.
An iron-base, sintered powder metal friction material for railroad braking use formed by solid phase sintering and consisting essentially of, by volume, 20-70% carbon in the form of coke or graphite;
- 0-2.5% sulfur;
- 1-20% ferrochrome, and balance iron.
An iron-base, sintered powder metal friction material for railroad braking use formed by solid phase sintering and consisting essentially of, by volume, 30-50% carbon in the form of coke or graphite, 10-20% ferrochrome, and balance iron.
Dependencies are inferred from the claim text.