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:
May. 20, 1980
Filed:
Sep. 18, 1978
Applicant:
Inventors:
Marios Economopoulos, Liege, BE;
Yves J Respen, Herstal, BE;
Assignee:
Centre de Recherches Metallurgiques, Brussels, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148 124 ; 148 39 ; 148145 ; 148146 ; 148152 ; 148153 ;
Abstract
The elastic limit and breaking load of steel sections are improved by a process of surface quenching and self-tempering comprising a cooling stage followed by rapid cooling which is interrupted to allow the quenched surface layer of the section to be tempered by heat from non-quenched inner portions of the section. The rapid cooling is succeeded by a slow cooling.