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Surface Treatment
- Oct 25, 2016 -

Surface treatment

Through the surface of the workpiece design and laser processing to improve its surface properties of the method. It is the use of laser beam quickly, locally heating the workpiece, to achieve local hot or cold, can be in the atmosphere, vacuum and other environmental processing. By changing the laser parameters, can solve different surface treatment process problems. Workpiece deformation is very small, is a non-contact processing methods. According to the different surface treatment purposes, divided into surface modification treatment (including laser glazing, laser remelting, laser alloying, laser coating) and removal (such as laser cleaning).

Laser surface:modification The use of laser scanning process material itself changes in the organizational structure or the introduction of other materials to improve the surface properties of the workpiece, the technology can selectively handle the workpiece surface is conducive to the workpiece as a whole to maintain adequate toughness and strength at the same time, Surface access to high, specific use performance, such as wear, corrosion and fatigue resistance, anti-oxidation and so on.

Laser alloying:The use of laser energy to heat the surface area of the material to a certain temperature or to form a thin layer of melting, by diffusion or by adding alloying elements or chemical reactions to change the surface chemical composition of the material surface to improve the mechanical, physical and chemical properties of technology. It has the advantages of local treatment, low matrix deformation, no damage to the substrate performance, high efficiency and rapid heating. It is especially suitable for the important parts of the workpiece, such as the joint line of the mold, the valve lifter and the cam surface. .

Coated:Laser coating is similar to laser alloying in that the laser heats the substrate while melting other alloy materials. However, the coating material is rarely diluted by the base material, leaving the original composition substantially unchanged, except that the coating is metallurgically bonded to the molten coating material.

Laser glazing: also known as laser polishing, it uses laser energy density of 10 ~ 10W / cm2, the rapid melting of the metal surface on the surface to form a very thin layer of melting layer, when the laser quickly removed, the metal itself to melt And the cooling rate is as high as 10 ~ 10 ℃ / S. Through this rapid melting and solidification process, a special amorphous layer (metallic glass) is produced on the metal surface. For the material modification is promising, its low cost, easy to control and replication, is conducive to the development of new materials. 

Laser removal:The surface of the workpiece using a laser to dirt, rust or coating layer instantaneous evaporation or stripping, high-speed and efficient cleaning of the workpiece surface. Laser cleaning process without organic solvents, pollution-free, no noise, is a "green" process.

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