Analysis of Influence of Material on Laser Cutting Machine

When the laser cutting machine work, metal absorption of light has a series of factors, such as laser wavelength, temperature, surface conditions.
First of all, the impact on the nature of the material
In the visible light and its adjacent areas, the reflectivity of the different metallic materials exhibits a complex change. However, in the infrared range of laser wavelength> 2um, the reflectivity of the metal is sorted: silver> steel> aluminum> nickel> carbon steel, that is, the better the conductivity of the material, the higher the reflectance of infrared. In this infrared band, photon energy is low, only coupling with the metal in the free electron.

The effect of laser wavelength 

In general, the longer the laser wavelength, the higher the reflectance, the lower the absorption ratio.   

The effect of laser temperature   

The resistivity of the metal increases with temperature increasing, at 20 ° C, the resistivity of the metallic material and the resistance temperature coefficient can calculate the absorption ratio at different temperatures, the absorption ratio increases with increasing temperature.