Sinter material for sealing strips in rotary piston engines
AssigneeGoetzewerke Friedrich Goetze AG
InventorsHorst Beyer, Ulrich Buran, Norbert Dautzenberg, Joseph Hewing
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Abstract
A sinterable material for use as sealing strips for rotary piston engines, the material being based on a known mixture of iron and vanadium carbide and further including a material which will be liquid at the sintering temperature and which will wet the carbide grains and partially dissolve them to give them a rounded form in the finished strip.
Claims15
In a sintered material for a sealing strip of a rotary piston engine and produced from a powder mixture of 15 to 45 weight percent of vanadium carbide or a mixture of vanadium carbide with at least one other metal carbide and balance essentially iron or iron alloy, the improvement wherein the powder mixture further comprises at least one additive selected from the group consisting of (1) the compound Cu.sub.3 P, (2) an alloy of the system Fe--B, (3) an alloy of the system Cu-Mn, and (4) an alloy of the system Ni--Mn--B, the amount of said additives (1), (2) and (3) when present being 4 weight percent and the amount of said additive (4) when present being 3 to 5 weight percent, said additive being liquid at the material sintering temperature and being effective to wet and partially dissolve the vanadium carbide during the sintering process and prevent the vanadium carbide from breaking out of the sintered material.
Dependencies are inferred from the claim text.