PURPOSE: To improve the heavy load high speed sliding performance, abrasion resistance and burning resistance by forming a sintered material layer composed of Al-Si system alloy on the sliding face against a swash plate made of steel base material.
CONSTITUTION: Al-Si system alloy is pressure crashed and heated for 15W50min under the temperature of 450W550°C to produce a porous sintered material layer 8 having the volume porosity of 5W35% which is adhered to a ferrous substrate 9 contacting against a swash plate 2 of slipper 3. Fe-Al compound 11 is placed as binder between said substrate 9 and said layer 8. While a recess 12 to be fitted with a ball 4 is formed in the opposite side face of said substrate 9 where a coating layer 10 composed of metal salt (for instance metallic soap) or sulfide is formed on the inner surface of said recess 12. Consequently, the heavy load high speed sliding characteristic, abrasion resistance and burning resistance are improved considerably.
ASAHI NAOTATSU
KISHI ATSUO
