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. 01, 1992
Filed:
Nov. 13, 1990
Applicant:
Inventors:
Michel Pierantoni, Lausanne, CH;
Eberhard Blank, Lausanne, CH;
Michel Carrard, Buchillon, CH;
Jean-Daniel Wagniere, Lausanne, CH;
Assignee:
Sulzer Brothers Limited, Winterthur, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
428654 ; 148903512 ;
Abstract
A substrate based on aluminum (Al) is given a surface coating of aluminum (Al) and silicon (Si) and of at least one element X from the group iron (Fe), nickel (Ni), cobalt (Co), manganese (Mn and chromium (Cr), the total proportion of elements X being 1 to 35 wt.%. Depending on the concentration (C) of elements X in wt.%, the minimum hardness over at least 50% of the coated surface, measured in HV 0.05, can be calculated from the formula;