Abstract
An attempt was made to develop an automotive plane bearing material having improved wear-resistant and anti-seizure properties to meet severe requirements for the greater load and boundary lubrication. Wear-resistant and hard cobalt-base alloy powder up to 7wt% was blended in the soft Cu-3%Sn-23%Pb matrix alloy powder. The mixture was spread over the backing steel sheet, primarily sintered in the decomposed propane gas, rolled for densifying and secondarily sintered. The cobalt-base hard particles containing molybdenum and chromium are evenly dispersed in the soft matrix. These dispersoids having heterogeneous microstructure lead to hardening of the sintered composite alloy and to improvements in its wear-resistance and anti-seizure property. The wear of shaft is also lightened.
