Application, process and color of titanium film plating

One, the use of titanium film
Titanium plating is generally used to improve the wear resistance of the surface of the object, for example, the tap and drill used in the high-speed machining center are coated with titanium to improve the wear resistance of the tool, and the surface treatment of the piston ring is also coated with titanium in order to improve the wear resistance.

Decorative titanium plating, generally titanium plating processing. Mainly golden color, good-looking, prevent the surface of the object oxidation, rust, etc.

Two, titanium plating commonly used process
1. Titanium plating process: vacuum coating and spraying process.
Vacuum coating includes: magnetron sputtering, arc ion plating, etc., if nitrogen can form titanium nitride in the coating process, the color of the coating is golden yellow, otherwise white. The method of thin coating, generally about 15 microns, coating brightness does not need subsequent processing.

Spraying method has cold spraying method. The coating is very thick, up to the order of millimeter, and the surface is rough and requires subsequent processing.

2. The difference between titanium carbide and titanium nitride coating:

Different colors: Titanium carbide (black) titanium nitride (gold).

Hardness is different: titanium carbide is harder than titanium nitride.

But titanium carbide is inferior to titanium nitride in high temperature oxidation resistance, so titanium nitride film is derived. In recent years, there are also more popular titanium aluminum nitride, chromium nitride membrane.

Titanium carbide process is more difficult than titanium nitride process, the control range is narrower.

The above two coating process has been very mature, divided into decorative plating and tool plating, decorative plating is generally very thin not more than 1 micron, tool plating requirements are 3-5 microns thick.

3. The reasons for the rough film layer: such as the substrate surface finish is not high, the surface ion bombardment before the coating is too long and so on.