Synchronizer ring

摘要

A synchronizer ring for performing synchronous sliding operation with and separating operation from a rotating object member, comprises a ring body having a sliding surface in slidable contact with the object member and a molybdenum or molybdenum alloy flame-coated film formed on the sliding surface, the film having a ceramic present in an amount of 5 to 30 weight %. The flame-coated film may have a surface roughness (Rz) of 20 to 60 mu m. The flame-coated film may further have a surface porosity of 5 to 30%, preferably 7 to 25% and a film thickness of 70 to 200 mu m, preferably 90 to 120 mu m.