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:
Jul. 30, 1985
Filed:
Nov. 02, 1983
Applicant:
Inventors:
Andre Gueussier, Paris, FR;
Edmond Vachiery, Solesmes, FR;
Assignee:
Vallourec, Adenauer, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21C / ;
U.S. Cl.
CPC ...
75 58 ; 75 53 ;
Abstract
The invention relates to the methods for the preparation of steels with high machinability, comprising globular inclusions which allow for high cutting speeds by means of carbide tools. The method according to the invention consists of introducing into a liquid steel which has been deoxidized carefully with aluminum, and desulfurized, additions of calcium and sulfur, carried out by a cored wire, the contents obtained being from 20 to 100 ppm calcium and 150 to 500 ppm sulfur. The steels prepared under this method offer a particular aptitude for high speed machining with the aid of carbide cutting tools.