Fibre metallurgical processing of cast iron-graphite composite material for self-lubrication service

Abstract

For further development of the high performance self-lubrication materials being proof against vacuum or high temperature, cast iron fibre composites containing a large amount of graphite were investigated. The cast iron fibre of 20~40 μm in diameter and 1.2 mm in length, which was prepared by chatter-machining a ductile cast iron bar, was mixed with graphite powder and consolidated by compacting in a die, sintering and finally repressing. The optimum conditions for the processing were determined experimentally, and the composite of the almost same mechanical strength as grey iron was made with an addition of 28.8 vol% graphite. In conclusion the fibre metallurgical processing of the high performance self-lubrication composite materials of cast iron and graphite is feasible in the production. © 1988, Japan Society of Powder and Powder Metallurgy. All rights reserved.