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. 04, 1984
Filed:
Sep. 30, 1982
Guy R Nicolas, 91200 Athis-Mons, FR;
Other;
Abstract
The invention concerns an abrasion resistent coating for steel and a method which makes it possible to obtain such a coating. The coating comprises two surface layers. The first surface layer, the outer layer, is formed of the phase (Cr, Fe).sub.2 B and possibly the phase M.sub.23 C.sub.6, while the second surface layer, the inner one, is formed of the phase (Fe, Cr).sub.2 B. In order to obtain this coating, a boriding is effected on steels at a temperature less than or equal to 950.degree. C. for a period of time greater than or equal to four hours, followed by a chromizing at a temperature less than or equal to 950.degree. C. for a period of time greater than or equal to 10 hours. Application to all steels in order to increase their resistance to wear is possible.