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:
Dec. 10, 2019
Filed:
Sep. 16, 2015
L'air Liquide, Sociétéanonyme Pour L'etude ET L'exploitation Des Procédés Georges Claude, Paris, FR;
Anna Fraczkiewicz, Saint Etienne, FR;
Karolina Maminska, Saint Etienne, FR;
Pascal Del-Gallo, Dourdan, FR;
Jader Furtado, Andresy, FR;
Daniel Gary, Montigny-le-Bretonneux, FR;
Abstract
The invention relates to a microstructure of an alloy for a tube for reformers, having an austenitic matrix structure, characterised in that: i) primary micrometric precipitates in the form of MC-type carbides, where M=Fe, Ni or Cr, and/or M(C,N)-type carbides, where M==Nb or Ti, are formed during the solidification of the alloy; ii) secondary nanometric precipitates in the form of MC-type carbides, where M=Fe, Ni or Cr and/or M(C,N)-type carbides, where M==Nb or Ti, are formed during the activation of the tube; and iii) between 0.1 and 0.3% of NiSi7Nb-type intermetallic precipitates is formed during the use of the tube.