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Vaporization

  • Author:naky
  • Source:www.diecastingpartsupplier.com
  • Release on:2015-09-11
Under heating high power density of the laser beam, the surface temperature was raised to the boiling temperature of the speed is so fast enough to avoid melting caused by heat conduction, so part of the material is vaporized into steam disappears, as a portion of the material was discharged from the bottom slit was secondary gas flow blown away. Some not molten material, such as wood, carbon materials and some plastics is through this vaporization method cutting forming.

Vaporization process, the steam take with melting and erosion particle debris, the formation of holes. Vaporization process, approximately 40% of the material turned into steam to disappear, while 60% of the material is in the form of droplets by air extermination.
Melting cutting

When the incident laser beam power density exceeds a certain value, the beam irradiation point inside the material begins to evaporate, forming pores. Once the hole is formed, it will serve as blackbody absorbs all the incident beam energy. Holes are surrounded by molten metal wall, and then, with the beam coaxial secondary airflow around the hole molten material away. With the movement of the workpiece, the hole is formed by cutting direction synchronous traverse a slit. Laser beams continue along this frontier slit irradiation sustained or pulse molten material being blown away from the inner seam.