Q & A


Q & A

Q & A on the scope of application of PVD

2022-04-24 11:32

1. What is the scope of application of sembil's PVD?

Our company mainly focuses on the development and application of functional coatings

2. What are the requirements of PVD functional coating on substrate?

Usually, metal materials need to have conductivity. Of course, non-metallic materials can also be used, but the process is special, and metal materials can not release metal gases such as zinc due to temperature and pressure in the PVD process. Moreover, the tempering temperature of the substrate must be higher than the coating process temperature, otherwise the workpiece will be deformed and the hardness will be reduced.

3. Can the assembly be treated with PVD?

Generally, the assembly can not be PVD treated, because it is an assembly of different materials. After coating, due to the different properties of materials, material cracking and workpiece separation may occur. If it can only be assembly parts, special treatment is required before coating.

4. Can PVD reduce the use cost?

For cutting tools, PVD coating treatment for molds increases the cost, but the service life and cutting quality of cutting tools and molds will be greatly improved after coating. For the mold, the coating can be de plated. After de plating and re plating before the coating is worn, the mold can be reused.

5. Can PVD increase hardness?

PVD coating only increases the surface hardness of the workpiece and cannot change the hardness of the substrate of the workpiece itself. Generally, the coating is only the icing on the cake. Generally, the service life of the workpiece before the original unmodified material can not be achieved by reducing the quality of the substrate and then performing PVD coating surface treatment. Moreover, if the tempering temperature of the workpiece is lower than the coating process temperature, the material will be deformed and the actual hardness of the workpiece will be reduced after PVD treatment.

6. Is the coating as thick and hard as possible?

The thicker the coating, the harder the better. When any coating reaches a thickness and hardness on a specific material, the comprehensive performance of the coating will be the best. If it is thicker or harder, the comprehensive properties of the coating will be reduced. The coating will peel off more easily. Because it is very soft for some base materials.

7. Is the friction coefficient of the coating the lubricity of the workpiece surface?

The surface friction coefficient of coating is an international standard test method. The actual friction coefficient of workpiece surface is determined by the machining condition of workpiece surface. PVD method usually can not change the surface finish of the workpiece. Unlike electroplating, it can not turn the rough surface into a smooth surface.