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:
Oct. 21, 1997
Filed:
Mar. 22, 1996
Applicant:
Inventors:
Tadataka Kaneko, Nagoya, JP;
Takehiko Esumi, Kyoto, JP;
Assignees:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ; B22F / ;
U.S. Cl.
CPC ...
75246 ; 75235 ; 419 19 ; 419 38 ;
Abstract
Disclosed are a sintered material having good machinability and process for producing the same. In the material, a composite oxide of CaO--MgO--SiO.sub.2 family are dispersed in Fe-dominant metal matrix. Wherein the composite oxide has the molar ratio of CaO/MgO from 0.05 to 2.0 wt. %, and also has the content of SiO.sub.2 from 50 to 75 wt. %. Hard particles of FeMo or such can be dispersed in the metal matrix. The maximum content of composite oxides in the sintered material are suggested to be 1.5 wt. % with the consideration of the mechanical strength. The sintered material can be cut with less tool wear and is produced by the process with low cost.