LEAD-IMPREGNATED SINTERED FERROUS ALLOY

摘要

A lead-filled sintered ferrous alloy containing carbon and chrome and preferably also molybdenum and vanadium is prepared in a powder metallurgy method and impregnated in its voids with lead. The alloy is characterized for its increased wear and heat resistant abilities and is accordingly advantageous when used as a material of a valve seat of an internal combustion engine using leadless fuel.