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. 18, 1984
Filed:
Oct. 07, 1981
Applicant:
Inventors:
Assignees:
Linde Aktiengesellschaft, Wiesbaden, DE;
Xaver Fendt & Co., Marktoberdorf, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148 13 ; 148 165 ; 148 166 ;
Abstract
A method of carburizing a metal workpiece and a carburizing apparatus in which the workpiece, generally of steel, is introduced into an annealing oven and subjected to a high temperature in the presence of a carbon-containing gas mixture as a result of which the workpiece is hardened. According to the invention, one or more of the carbon-containing gas components of the mixture effective upon the surface of the work-piece, can be periodically and impulsively injected into the gas mixture for sudden increases in carbon potential followed by longer diffusion phase.