Apex seals for high power rotary piston engines
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United States of America Patent
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-
Oct 8, 1985
Grant Date -
N/A
app pub date -
Mar 26, 1984
filing date -
Mar 26, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apex seal for rotary piston engines comprising a material containing in weight 2.5 to 4.0% of C, 1.5 to 3.0% of Si, less than 1.0% of Mn, 0.25 to 2.0% of Ni, 0.25 to 2.0% of Mo, 0.25 to 2.0% of Cu, 0.05 to 0.3% of B, 0.2 to 1.5% of Cr, 0.05 to 1.0% of V and balance substantially of Fe. The sliding surface portion of the seal is of a chilled structure containing in area ratio more than 55% of carbides and the body portion is essentially of bainite structure containing in area ratio less than 15% of carbides.
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