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. 13, 1993
Filed:
May. 16, 1991
Applicant:
Inventors:
Lars-Ake Norstrom, Hagfors, SE;
Henrik Jespersson, Hagfors, SE;
Assignee:
Uddeholm Tooling Aktiebolag, Hagfors, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ; C22C / ;
U.S. Cl.
CPC ...
420 63 ; 148318 ; 148326 ; 148327 ;
Abstract
The invention relates to a precipitation-hardenable tool steel intended for plastic forming tools manufactured therefrom. The tool steel at the manufacturing of the tool and prior to hardening through ageing treatment but after solution heat treatment and cooling to room temperature has a hardness less than 40 HRC, but after the manufacturing of the tool and the subsequent age hardening treatment, i.e. in the precipitation hardened condition, is harder than 45 HRC and has a high corrosion resistance and a toughness sufficient for plastic forming tools. The steel contains in weight-%: