To provide a method for manufacturing an endless metallic belt by which the endless metallic belt having high strength can be obtained by preventing the generation of nitrogen compound on the surface after nitriding-treatment, when the endless metallic belt manufactured with a maraging steel as a base steel plate and used for power transmitting belt, such as non-stage transmission, is manufactured.
After applying a solution-treatment to a ring-like member 12, with which the maraging steel is used as the base steel plate 11, the surface of the ring-like member 13 is polished or ground to about 0.5-3μm thickness with e.g. barrel-polishing, and an element condensed layer and an oxide layer formed at solution-treating time, are mechanically removed. In this way, in a nitriding-treatment thereafter, it can be avoided to generate the nitrogen compound on the front and the back surfaces and the endless metallic belt having high strength can be obtained. Desirably, the solution-treatment is applied by using a high frequency induction heating under inert gas atmosphere. In this way, the thickness of the surface layer to be removed can be thinned and the manufacturing cost can be reduced.
Sekiya Mitsuo
Yasushi Hayakawa