The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 1987
Filed:
Aug. 15, 1984
Allegheny Ludlum Corporation, Pittsburgh, PA (US);
Abstract
A ferritic stainless steel alloy is provided which is hot workable and is resistant to thermal cyclic oxidation and scaling at elevated temperatures. The iron-chromium-aluminum alloy contains cerium, lanthanum and other rare earths and is suitable for forming thereon an adherent textured aluminum oxide surface. Also provided are an oxidation resistant catalytic substrate made from the alloy and a method of making the steel article and products having a textured aluminum oxide surface. The method includes steps of heat treating the cold worked steel article to form the adherent textured oxide surface and, optionally, pretreatment heating of the cold worked article before the texture heat treatment.