Method of manufacturing a laminated ring

摘要

A cylindrical drum (2) is prepared by welding opposite ends of a thin sheet (1) of maraging steel. A first solution treatment is effected on the cylindrical drum (2), and then the cylindrical drum (2) is severed into a plurality of rings (4) each having a predetermined width. After the rings (4) are rolled, a second solution treatment is effected on the rings (4) which have been rolled, and then the circumferential length of each of the rings (4) is corrected. The rings (4) are aged and nitrided, and then stacked into a laminated ring. The first solution treatment and the second solution treatment are effected using the same heating furnace in the same atmosphere in the same temperature range.