Sintered material having good machinability and process for prod

Details Sintered material having good machinability and process for prod Sintered material having good machinability and process for prod

1996-03-22

1997-10-21

Mai, Ngoclan

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75235, 419 19, 419 38, C22C 3300, B22F 312

Patent

active

056799098

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.

REFERENCES:
patent: 5259860 (1993-11-01), Ikenoue et al.
patent: 5326526 (1994-07-01), Ikenoue et al.
patent: 5534220 (1996-07-01), Purnell et al.
European Search Report dated Jul. 4, 1996 (2 pages).
Communication dated Jul. 12, 1996 (1 page).
Statement of Relevancy (1 page) (Discussing Japanese Patent Publication (KOKAI) No. 63-93842).
Statement of Relevancy (1 page) (Discussing Japanese Patent Publication No. 7-11006).

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