Development and application of powder metallurgy double-linked cam for lightweight dental drilling rig
The double-linked cam,as the main transmission part of a lightweight electric dental drill,is required to have lightness and excellent mechanical properties.In this paper,the finite element software-Deform was used to simulate and analyze the green compact under different die structure schemes.Based on Fe-Cr-Mo sin-tered hardening material,the effects of four different processes,including conventional sintering,copper infiltra-tion sintering,conventional sintering+carburizing quenching and copper infiltration sintering+carburizing quench-ing,on mechanical properties were analyzed from the aspects of alloy composition,density and microstructure.Finally,the mold structure scheme of'two upper punches and three lower punches'is selected,and a combina-tion of copper dipping and carburizing is adopted to successfully prepare the double-linked cam,which owns ex-cellent hardness and wear resistance.
powder metallurgydouble-linked camdeform simulationcopper infiltrationcarburizing and quenching
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