Apex seals for high power rotary piston engines

Details Apex seals for high power rotary piston engines Apex seals for high power rotary piston engines

1984-03-26

1985-10-08

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

148 35, 148 39, C21D 500

Patent

active

045458251

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.

REFERENCES:
patent: 3658451 (1972-04-01), Gomada
patent: 3802927 (1974-04-01), Gomada
patent: 3830601 (1974-08-01), Yamazaki
patent: 4125399 (1978-11-01), Kizu et al.
patent: 4153477 (1979-05-01), Beyer et al.

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