SURFACE TEMPERATURE MEASURING METHOD, SURFACE TEMPERATURE MEASURING APPARATUS, AND STEEL MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a surface temperature measuring method which can perform temperature measurement with high precision even in a low-temperature range in which a material for temperature measurement is under water cooling and its surface temperature is about 200°C.;SOLUTION: The method for measuring the surface temperature of a material for temperature measurement detects thermal radiation emitted from the surface of the material for temperature measurement M under water cooling by a radiation thermometer 1 arranged facing the surface of the material for temperature measurement. The wavelength of the thermal radiation detected by the radiation thermometer is set to be 1.60 to 1.80 μm. Air is injected from the radiation thermometer toward the surface of the material for temperature measurement, thereby forming an air column in between the surface of the material for temperature measurement and the radiation thermometer. The thermal radiation emitted from the surface of the material for temperature measurement is detected by the radiation thermometer through the air column.;COPYRIGHT: (C)2011,JPO&INPIT