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US 4,596,282 AGranted
Heat treated high strength bimetallic cylinder
AssigneeXaloy, Inc.
InventorsWoodrow D. Maddy, Giri Rajendran
Life of this patent
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Abstract
A high strength bimetallic cylinder having a wear-resistant ferrous liner or inlay and capable of withstanding high stresses is provided by a heat treatment process wherein the cylinder steel is transformed into the austenitic phase, followed by rapidly cooling the cylinder to an intermediate temperature so that the ferrous outer housing is transformed to a bainitic structure, and then slowly cooling the cylinder to transform the ferrous liner into a martensitic structure.
Claims8
A method for manufacturing a high strength bimetallic cylinder comprising the steps of:
- depositing a wear and corrosion resistant ferrous alloy liner in a steel cylinder;
- heat treating the cylinder by heating to a temperature sufficient to form an austenitic phase in the cylinder, cooling the cylinder to an intermediate temperature, which is above the start of the martensitic transformation temperature of the alloy liner, so that the ferrous outer casing is transformed to a bainitic structure, and then further cooling the cylinder so that the ferrous alloy liner is transformed into a martensitic structure.
Dependencies are inferred from the claim text.