| 摘要 |
<p>Disclosed is a method for producing a laminated ring, which is capable of enhancing nitridation efficiency of a plurality of strip-shaped metal members constituting the laminated ring. The method includes a nitriding treatment step (P11) for applying nitriding treatment in which slits (S) formed in some between the layers of a first strip-shaped metal member (121) to a ninth strip-shaped metal member (129) in the circumferential direction, which are laminated to one another, are maintained for predetermined time in a predetermined concentration of a nitriding gas atmosphere while inducing the relative displacement of each of the slits (S) in the circumferential direction, thereby diffusing nitrogen into the surface layers of the first strip-shaped metal member (121) to the ninth strip-shaped metal member (129). Thus, even if the nitriding treatment is applied in the state in which the strip-shaped metal members (12) are laminated to one another, the nitriding gas is adequately supplied over the entire circumference between the layers of the strip-shaped metal members (12) so as to adequately nitride the strip-shaped metal members (12), thus making it possible to increase the number of strip-shaped metal members (12) which can be treated at a time so as to enhance the nitridation efficiency of the strip-shaped metal members (12).</p> |
