Antifriction alloy

Details Antifriction alloy Antifriction alloy

1978-10-26

1981-04-14

Skiff, Peter K.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75134H, 75176, 75231, C22C 2704, C22C 3000

Patent

active

042617413

ABSTRACT:
An antifriction alloy containing iron, molybdenum and sulphur, and having a low coefficient of friction, even in the dry state, is disclosed. The alloy contains 8.0-26.6% iron, 41.0-62.5% molybdenum and 23.3-40.5% sulphur. The alloy may comprise a matrix of Fe.sub.x Mo.sub.3+y S.sub.4, where x and y are less than 1. (e.g. FeMo.sub.4 S.sub.5) in which is dispersed FeMo.sub.2 S.sub.4 and/or the .epsilon. phase of the Fe/Mo/S equilibrium diagram. The alloy reacts with a material against which it rubs, to form the sulphide of that material on the rubbed surface. The alloy may be made by chemical reaction, fusion, vacuum deposition, or powder metallurgy. It can be used alone, or as a surface layer on, or inclusion in, another material, or it can be dispersed as a powder in a lubricant.

REFERENCES:
patent: 2945291 (1960-07-01), Ankeny et al.
patent: 3008225 (1961-11-01), Healy
patent: 3479289 (1969-11-01), Van Wyk
patent: 3918923 (1975-11-01), Inoue
Mizutani, "Formation of Molybdenum Sulfide in Fe-Mo-S Alloys and Its Effect n Frictional Property", Metals Abstracts, Apr., 1977, p. 6 43.

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