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:
Feb. 02, 1982
Filed:
May. 23, 1978
Applicant:
Inventor:
Philippe A Paulus, Liege, BE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ; C21D / ;
U.S. Cl.
CPC ...
148142 ; 148 / ; 148 123 ; 148143 ;
Abstract
In a continuous heat-treatment process, cold-rolled steel strip having a thickness of 0.05 to 1 mm, e.g. for producing tin plate, is heated to 650.degree.-850.degree. C. and held in this temperature range for more than 1 s. The strip is then quenched for less than 12 seconds in an aqueous bath at above 75.degree. C., the strip emerging at below 550.degree. C. Temperatures, times, and subsequent steps such as overaging and final cooling are chosen depending on the hardness desired.