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In the laser melting and cutting, the workpiece is partially melted and sprayed with the molten material by means of air flow. Because the transfer of material occurs only in its liquid condition, the process is known as laser melting and cutting.
The laser beam is equipped with a high purity inert cutting gas that prompts the molten material to leave the slit, and the gas itself does not participate in cutting. Laser-Fused cutting can get a higher cutting speed than gasification cutting. The energy required for gasification is usually higher than the energy required to melt the material. In laser melting and cutting, the laser beam is only partially absorbed. The maximum cutting speed increases with the increase of the laser power, and decreases with the increase of sheet thickness and the melting temperature of the material. In the case of a certain laser power, the limiting factor is the pressure at the slit and the heat conduction rate of the material. Laser melting and cutting for iron materials and titanium metal can be no oxidation incision. The laser power density, which produces molten but not gasification, is between 104w/cm2~105 $literal for steel materials.