A 1 mm thick, 100 mm × 100 mm steel plate coated with blackbody paint was locally heated using a halogen point heater.
The temperature distribution during heating was observed using a thermographic camera with an emissivity setting of 0.94. The blackbody coating equalizes surface emissivity and reduces measurement errors caused by reflections from the metal surface.
Steel has a thermal conductivity of approximately 80 W/m·K and is characterized by heat diffusing outward while maintaining a high-temperature region around the heated area. This video visualizes the temperature rise and heat diffusion behavior during localized infrared heating using thermographic imaging.
By comparing the heat diffusion behavior of metals with different thermal conductivities, the influence of material properties on temperature distribution can be observed.
Infrared heating is widely used for localized heating, joining, drying, heat treatment, and temperature distribution evaluation in various industrial applications.
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