Metal treatment – Process of modifying or maintaining internal physical... – With measuring – testing – or sensing
Patent
1992-09-09
1995-06-13
Wyszomierski, George
Metal treatment
Process of modifying or maintaining internal physical...
With measuring, testing, or sensing
148510, 148511, C21D 134
Patent
active
054239265
ABSTRACT:
A plate temperature and an emissivity are determined at the outlet of an insulated heated zone, and compensations are established which reduce deviations between the respective measured values and the respective target values. A heat input is compensated for in accordance with the greater one of the compensations relating to the plate temperature and the emissivity, respectively. For a U-pattern material, .DELTA.Q is previously added to the heat input for the leading and the trailing end portion of the material. The band steel is irradiated by laser radiation at the outlet of the heating zone in order to detect the degree of alloying on the basis of the intensity of reflected radiation. When an unalloyed surface is detected, a target value of the heat input is modified. ITV camera is used to determine the optical reflectivity of the surface of the band steel at the outlet of a cooling zone in order to detect the degree of alloying. After the process has been stabilized, the heat input is gradually decremented, and when any slight insufficiency in the degree of alloying is detected, a fixed compensation is added to the heat input under that condition, subsequently ceasing to update the heat input.
REFERENCES:
patent: 4913748 (1990-04-01), Sellitto et al.
patent: 5052661 (1991-10-01), Dunlay et al.
Masuda Masahiro
Miyazaki Tetsuya
Nakamura Isao
Sashihara Yoichi
Sekimoto Kazuhiro
Nippon Steel Corporation
Wyszomierski George
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