Effect of SUS304 Steel Surface Roughness on Infrared Image
SUS304钢表面粗糙度对红外图像的影响

In order to improve the accuracy of infrared image and measured temperature, the relation between surface roughness and emissivity of SUS304 steel in plastic deformation under uniaxial tension was studied by using infrared imager, CCD camera and laser surface shape measuring microscope, based on the measurement principle of infrared imaging and the principle of infrared radiation. The temperature distribution in plastic deformation was measured by using thermocouple and thermal infrared imager. Results show that the emissivity is increased proportionably with surface roughness, resulting in the plastic deformation zone measured by the thermal infrared imager is larger than practical deformation area. The effective emissivity may be improved through setting the surface roughness of the material in advance, thereby better infrared image and higher temperature measurement precision can be obtained.