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:
Mar. 04, 1980
Filed:
May. 02, 1978
Philippe A Paulus, Liege, BE;
Marios Economopoulos, Liege, BE;
Abstract
Cold-rolled steel sheet or strip (e.g. containing max. 0.15% C., max. 0.60% Mn, max. 0.020% Si, and 0.001-0.050% B) is heated to a temperature higher than its recrystallization temperature and then cooled by immersion in an aqueous bath at above 75.degree. C. The cooling by immersion consists of two successive stages, in the first of which cooling occurs at a rate of 25.degree.-180.degree. C./s to 200.degree.-425.degree. C., the product of the cooling rate v in .degree. C./s times the sheet or strip thickness e in mm being greater than 25, and in the second of which v is 90.degree.-500.degree. C./s and v times e is at least 35. Optionally a further annealing or overageing step comprises holding at 275.degree.-525.degree. C. for 30-250 s.