Method of manufacturing laminated ring and molten salt composition for use in such method

摘要

A laminated ring for use as a belt in transmitting power in a continuously variable transmission is produced by welding opposite ends of a sheet (1) of maraging steel to produce a plurality of rings (3), and rolling said rings to a predetermined length. The rings (4) are nitrided in a salt-bath nitriding process by dipping the rings in a molten salt composition containing 38 - 46% of CNO<-> and 1-2% of CN<-> and heated to a temperature in the range from 480 to 530 DEG C, for a period of time ranging from 10 to 25 minutes. The nitrided rings (4) are finally stacked into a laminated ring.