Composite material with a high proportion of intermetallic phases, preferably for friction bodies
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United States of America Patent
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Sep 3, 2002
Grant Date -
N/A
app pub date -
Aug 9, 1999
filing date -
Aug 14, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A metallic cast material for friction bodies in acceleration or deceleration devices, particularly in the brake or clutch systems of road or rail vehicles, is produced from the iron/aluminum/carbon tertiary group so that the material is largely in the intermetallic phase having an ordered crystal lattice structure, and free carbon in lamellar, sphoroidal or vermicular form is present therein. The proportion of aluminum in the alloy is between 20 and 28% by weight, preferably 24% by weight. The material may be melted and cast open to the air. Solid or internally ventilated brake discs are mentioned as appropriate friction bodies. The friction bodies are lighter, more resistant to corrosion and wear, have a higher alternate bending fatigue strength and are at least as easily workable as previously known friction bodies made from ferrous materials.
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