The laser cutting machine uses a high-power-density laser beam to irradiate the material, so that the material is quickly heated to a molten or vaporized state. Laser processing has high efficiency, high energy density and flexibility, no matter in terms of precision, speed or efficiency, it is the only choice for all walks of life.
When the laser is absorbed by the processed material and converted into heat energy, different power density changes will occur on the surface of the material. As the temperature rises, the material undergoes state changes such as phase transition, melting, and vaporization. Different states and changes have a great influence on the absorption of laser light.
Many sheet metal processing customers will ask whether the fiber laser cutting machine can cut high-resistant materials such as aluminum and copper when purchasing a fiber laser cutting machine. In fact, fiber laser cutting machines can cut aluminum plates a few years ago. After repeated attempts and innovations, the quality of cutting highly reflective materials is getting higher and higher.
Method 1: Judging by the laser output wavelength
For different output wavelengths of laser light, different materials exhibit different absorption rates (high or low).
Method 2: Judging from the surface structure
The smoother the material surface, the lower the laser absorption rate. High enough for laser processing if smooth enough (even stainless steel).
Method 3: Judgment of resistivity
Generally speaking, the smaller the resistivity of the material, the lower the laser absorption rate (high inverse). The higher the resistivity, the higher the absorption rate.
Method 4: Judging the Surface State
The surface temperature of the material (solid, liquid) is the same, but the laser absorption rate is different (high or not high). In general, the higher the temperature or the surface of the liquid, the higher the absorption rate of the laser. Cold or solid states generally have lower absorption rates than liquid states.