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. 17, 1985
Filed:
Dec. 16, 1983
Applicant:
Inventors:
Horst Muhlberger, D-6000 Frankfurt/Main, DE;
Bruno Prinz, Oberursel, DE;
Wolf Wunder, Oberursel, DE;
Ulrich Schafer, Weisloch, DE;
Josef Bognar, St. Leon-Rot, DE;
Assignee:
Other;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148139 ;
Abstract
A high ductility machinable cast iron with mixed austenitic-bainitic structure is made by a method which involves limiting the manganese content to less than 0.3% by weight and utilizing a substantially lower temperature austenitizing heat treatment (820.degree. to 830.degree. C.) for a shorter period (10 to 25 minutes) than has hitherto been considered to be necessary to achieve such structures. The low alloy cast iron can therefore be made from available scrap with low manganese content and at low cost.