The future development of coating industry must be vacuum coating

The future development of coating industry must be vacuum coating

there are two main types of professional coating methods,one is chemical deposition (CVD), one is physical climate accumulation, also called vacuum deposition (PVD).

Chemical coating is rich in a membrane element of gaseous reaction agent or liquid reaction required for other gas introducing echo chamber, in the process of chemical reaction to generate film substrate appearance attack. In the process of chemical film, simple solution pollution, if the coating appearance more impurities, owe better plating.

Chemical coating demand response temperature is very high, usually to control at 1000 ℃ or more, but many matrix data cannot be influenced by the high temperature, timely and cemented carbide, although can endured high temperature, because of the high temperature in chemical coating manufacturing environment will also constitute a coarse grains,which cause the brittle phase, function deterioration. If on the carbide TiN plating, diffusion of carbon will attack response and solution decarburized layer, the layer patience is poor, low flexural strength, constitute a taking shorten tool use.

Vacuum coating machine dispose of chemical coating attack in a series of questions excellently. Vacuum coating is under the condition of vacuum, choose low voltage, high current arc discharge skills, using gas discharge ability, use other discharge is the transpiration and restore the transpiration of target material and gas ionization, all using the accelerating effect of electric field, the accumulation and reaction products made by transpiration material on the workpiece.

All coating materials are in a vacuum environment after plasma accumulation in the appearance of workpiece, the disposal of the chemical plating solution of pollution question, not toxic or pollutants, plating film hardness higher, good wear resistance and corrosion resistance, more safe. Disposal of vacuum coating technology can control the temperature below 150 ℃ ~ 500 ℃, suitable for a variety of substrate materials, preparation of colorful coating, plating system of carbide cutting tools can make its full progress 2 ~ 10 times.