Synchronizer ring in speed variator made of iron-base sintered a

Details Synchronizer ring in speed variator made of iron-base sintered a Synchronizer ring in speed variator made of iron-base sintered a

1988-03-07

1990-07-24

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75244, 75246, 192107M, C22C 2900

Patent

active

049433210

ABSTRACT:
A novel synchronizer ring for use in speed variators that is made of an iron-base sintered alloy and which has high strength and wear resistance while exhibiting good accommodation by the mating surface is disclosed. This synchronizer ring is made of an iron-base sintered alloy that contains 0.1-0.9 wt % C., and at least one optional element selected from among 0.1-6 wt % of at least one of Mn, Cr and Mo, 0.1-6 wt % of at least one of Ni and Cu, and 0.02-0.5 wt % B, the balance being Fe and incidental impurities (Si, S and P as incidental impurities being present in a total amount not exceeding 0.5 wt %), and which has a porosity of 0.05-5 vol %. The properties of this ring, notably its wear resistance, can be further improved by forming either a hard Ni-P compound layer or a nitrided layer on at least the surface of the above-specified sintered alloy which is to make sliding contact with a tapered cone.

REFERENCES:
patent: 3863318 (1975-02-01), Niimi et al.
patent: 4035159 (1977-07-01), Hashimoto et al.
patent: 4204031 (1980-05-01), Takemura et al.
patent: 4233073 (1980-11-01), Takemura
Kinzoku Hyomen Gijutsu Binran, (Handbook of Surface Treatment for Metals), published by Nikkan Kogyo Shinbunsha on Nov. 30, 1976, pp. 442-444.
Kinzoku Binran (Metals Handbook), published by Maruzen K. K. on Jun. 25, 1971, pp. 1690-1691.
Kanigan Data Sheet of General American Transportation Co.

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