Back to results
US 10,519,523 B2Granted
Infrared heating method, infrared heating and forming method of steel sheet and automobile component obtained thereby, and infrared heating furnace
AssigneeAisin Takaoka Co., Ltd.
InventorRyozo Wada
Life of this patent
Estimating the term…
Abstract
An infrared heating method comprises: wholly infrared heating a steel sheet uniformly up to a temperature which is A3 point or above; and temperature distribution controlling, wherein, after the wholly infrared heating, partial lowering of a light intensity of infrared rays irradiated toward the steel sheet is performed to provide a first region having a temperature of A3 point or above and a second region having a temperature less than A1 point in the steel sheet.
Claims10
An infrared heating method, comprising:
- wholly infrared heating a steel sheet uniformly up to a temperature which is A3 point or above;
- and
- temperature distribution controlling, wherein, after the wholly infrared heating, partial lowering of a light intensity of infrared rays irradiated toward the steel sheet is performed to provide a first region having a temperature of A3 point or above and a second region having a temperature less than A1 point in the steel sheet, wherein
- in the wholly infrared heating and the temperature distribution controlling,
- one surface of the steel sheet is irradiated directly by the infrared rays without being irradiated by reflected rays generated by reflection of the infrared rays, and simultaneously,
- an opposite surface of the steel sheet is irradiated by the reflected rays without being irradiated directly by the infrared rays.
3 more elements
An infrared heating and forming method of a steel sheet, comprising:
- wholly infrared heating a steel sheet uniformly up to a temperature which is A3 point or above;
- temperature distribution controlling, wherein, after the wholly infrared heating, partial lowering of a light intensity of infrared rays irradiated toward the steel sheet is performed to provide a first region having a temperature of A3 point or above and a second region having a temperature less than A1 point in the steel sheet;
- and
- processing the steel sheet, wherein, after the temperature distribution controlling, the first region is subjected to rapidly cooling and forming to be quench-hardened at or above a critical cooling rate, while the second region is subjected to cooling and forming at a cooling rate below the critical cooling rate, wherein
- in the wholly infrared heating and the temperature distribution controlling,
- one surface of the steel sheet is irradiated directly by the infrared rays without being irradiated by reflected rays generated by reflection of the infrared rays, and simultaneously,
- an opposite surface of the steel sheet is irradiated by the reflected rays without being irradiated directly by the infrared rays.
4 more elements
Dependencies are inferred from the claim text.