Sulphur and nitrogen treated iron based rotor for rotary piston

Rotary expansible chamber devices – With wear surface treatment or integrally plated wear layer

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418179, F01C 2100

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active

040749568

ABSTRACT:
A rotary piston engine has a pair of side housings made of high silicon aluminum alloy and a rotor made of iron-based material. The side surfaces of the rotor are subjected to a surface treatment called "Sulfinuz" to form surface layers rich in sulphur and nitrogen for minimizing scuffing between the side surfaces of the side housings and the side surfaces of the rotating rotor due to thermal expansion of the side housings and vibration of the rotor.

REFERENCES:
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patent: 3197125 (1965-07-01), Bachman et al.
patent: 3333579 (1967-08-01), Shockley et al.
patent: 3359956 (1967-12-01), Bentele
patent: 3712767 (1973-01-01), Beutter
patent: 3808955 (1974-05-01), Hamada et al.
patent: 3903951 (1975-09-01), Kaweko et al.

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