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. 29, 2000
Filed:
Mar. 20, 1998
Applicant:
Inventors:
Peter Ernst, Stadel, CH;
Peter Uggowitzer, Ottenbach, CH;
Markus Speidel, Birmenstorf, CH;
Alkan Gocmen, Baden-Dattwil, CH;
Assignee:
ABB Research Ltd., Zurich, CH;
Primary Examiner:
Int. Cl.
CPC ...
C22C / ; C22C / ; C21D / ;
U.S. Cl.
CPC ...
148325 ; 148333 ; 148663 ; 148654 ; 420 38 ; 420107 ;
Abstract
A fully martensitic quenching and tempering steel (AP) essentially consists of (measured in % by weight): 8 to 15% of Cr, up to 15% of Co, up to 4% of Mn, up to 4% of Ni, up to 8% of Mo, up to 6% of W, 0.5 to 1.5% of V, up to 0.15% of Nb, up to 0.04% of Ti, up to 0.4% of Ta, up to 0.02% of Zr, up to 0.02% of Hf, at most 50 ppm of B, up to 0.1% of C and 0.12-0.25% of N, the content of Mn+Ni being less than 4% and the content of Mo+W being less than 8%, the remainder being iron and usual impurities resulting from smelting.