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. 09, 1996
Filed:
Sep. 30, 1994
Applicant:
Inventors:
Assignee:
Brico Engineering Limited, Coventry, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22F / ;
U.S. Cl.
CPC ...
419 45 ; 419 10 ; 419 32 ; 419 38 ; 75228 ; 75230 ; 75231 ; 75245 ; 75246 ;
Abstract
A method is described for the manufacture of a sintered ferrous-based material having improved machinability, the method comprises the steps of making a mixture of a ferrous-based powder, the mixture including a compound containing at least one metal from the group comprising manganese and the alkaline-earth series of metals; at least one sulphur donating material; pressing the powder mixture and sintering the pressed mixture so as to cause the formation by reaction during sintering of at least one stable metal sulphide within the sintered material. Materials and articles made by the method are also described.