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:
Sep. 09, 1986
Filed:
Mar. 01, 1985
Applicant:
Inventors:
Jurgen Hartwig, Essen, DE;
Paul Pant, Essen, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
148120 ; 148121 ; 148 / ; 148 / ; 148135 ; 148-2 ;
Abstract
The corrosion resistant chromium steel which includes 3 to 45% chromium, 0.2 to 5% nitrogen and other elements. Its structure contains at least 50% ferromagnetic structure components. It is directly magnetizable and, at 400.degree. C., has a yield strength of R.sub.p0.2 >400 N/mm.sup.2 and, at 600.degree. C., a yield strength of R.sub.p0.2 >250 N/mm.sup.2. To produce this chromium steel, a prealloy containing at least 50% ferromagnetic structure components is nitrogen enriched under pressure, is then hot worked, then annealed at 800.degree. to 1250.degree. C. and finally cooled to room temperature. A tempering treatment at 450.degree. to 750.degree. C. may follow.