Abstract

A new kind of Al Zn based alloy containing Pb has been designed. Its friction and wear behaviour was studied in comparison with that of SAE 660 bronze and ZA27 zinc alloy. The results showed that the addition of Pb is effective in improving the antifrictional property of aluminum alloys. The Al Zn Pb alloy is superior to SAE 660 bronze and ZA27 alloy in wear resistance and antifriction; its load bearing capacity is higher than that of SAE 660 bronze. Furthermore, Al Zn Pb alloy is superior to ZA27 alloy in corrosion resistance and dimensional stability. It is concluded that Al Zn Pb alloy has good bearing properties and could work under medium sliding speed at a higher load condition with lower cost; so using Al Zn Pb alloy to substitute for bronze to make some sliding bearing parts has economical significance. The microstructure and microhardness of Al Zn Pb and SAE 660 bronze have been examined in order to explain the mechanism of their friction and wear behaviour.

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