Graphitic steel compositions

Details Graphitic steel compositions Graphitic steel compositions

1994-01-24

1995-12-26

Yee, Deborah

Alloys or metallic compositions

Ferrous

One percent or more carbon containing, but less than 1.7...

420100, 420101, 148593, 148654, 148320, C21D 810, C22C 3802

Patent

active

054785235

ABSTRACT:
A machinable, graphitic steel is disclosed having a composition in weight % of about 1.0 to 1.5 total C; 1.0 to Si; 0.3 to 1.0 Mn; up to 2.0 Ni; up to 0.5 Cr; up to 0.5 Mo; up to 0.1 S; up to 0.5 Al; balance Fe and incidental impurities. The steel is hot worked and cooled to precipitate a controlled amount of graphite for improved machinability and to achieve a controlled amount of matrix carbon for enhanced physical properties. A matrix carbon content of between about 0.2 to 0.8 weight % is desired. The steel may be further heat treated to yield further variations in the microstructure and physical properties.

REFERENCES:
patent: 3099556 (1963-07-01), Jatczak
patent: 4061494 (1977-12-01), Yokokawa et al.

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