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US 3,944,396 AGranted
Pressure bonded, low yield strength composite
AssigneeAllegheny Ludlum Industries, Inc.
InventorJoseph A. Chivinsky
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Abstract
A pressure bonded composite article and a method for producing it. The article is comprised of a layer of plain carbon steel containing up to 1.5% of carbide former, a layer of stainless steel, and a layer of not readily oxidizable metal therebetween. The method comprises the steps of superimposing the layers, heating them at a temperature of from 1200.degree. to 2400.degree.F, and subsequently hot rolling them.
Claims5
A pressure bonded composite article having at least two ferrous layers and at least one nonferrous layer, comprised of:
- at least one layer of plain carbon steel having up to 0.75 % of carbide former from the group consisting of titanium and columbium, said carbide former being present in a carbide former-to-carbon ratio of from 5 to 15;
- at least one layer of stainless steel;
- and at least one layer of a nonferrous third metal having a free energy of oxide formation less negative than the free energy of oxide formation for said plain carbon steel at any particular temperature between 1200.degree. and 2400.degree.F, at least one layer of said third metal being between a layer of said plain carbon steel and a layer of said stainless steel;
- said composite material having a 0.2% yield strength of less than 50,000 pounds per square inch.
1 more element
Dependencies are inferred from the claim text.