Method of annealing metal member
AssigneeNippon Steel Corporation
InventorsYasuo Ohsugi, Tsuyoshi Hamaya, Satoshi Arai, Eiji Yanagida, Shinya Sano, Masaaki Kondo, Toshimitsu Takahashi, Yoji Sato
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Abstract
A method of annealing a metal member includes: disposing a first heater in an inner space of a hollow cylindrical metal member having an inner peripheral surface provided with plural teeth protruding toward a central direction, the first heater radiating infrared light and being disposed so as to extend parallel to a direction of a central axis of the metal member; heating the metal member from the inner space with the first heater; and gradually cooling the metal member after heating.
Claims13
A method of annealing a metal member, the method comprising:
- disposing a first heater in an inner space of a hollow cylindrical metal member having an inner peripheral surface provided with a plurality of teeth protruding toward a central direction, the first heater radiating an infrared light and being disposed so as to extend parallel to a direction of a central axis of the metal member;
- and
- annealing including
- heating the metal member throughout the entire length in the central axis direction uniformly 700° C. or higher from the inner space by the infrared light radiated from the first heater in a non-oxidizing environment;
- and
- cooling the metal member after heating.
Dependencies are inferred from the claim text.