Titanium nitride coating (tin)
Tin is a general-purpose pvd coating, which can improve the tool hardness and have high oxidation temperature. The coating has good processing effect for high speed steel knives.
Nitrogen-TiC coating (ticn)
Carbon element in ticn coating improves tool hardness and lubricity. It is an ideal coating for high-speed steel tool.
Nitrogen, aluminum and titanium coatings (tialn/altin)
A layer of alumina formed in the coating of nitrogen, aluminum, titanium and aluminum can improve the life of cutting tools at high temperature. Coatings for dry or semi-dry cutting.The ratio of aluminum to titanium in the coating is different, and the nitrogen-titanium-aluminium coating has higher hardness than the nitrogen-aluminium-titanium coating.
Chromium nitride coating (CrN)
The good adhesion resistance of chromium nitride coating makes it the preferred coating in the processing of chip tumor. After coating this almost invisible coating, the machining performance of cutting tools such as high speed steel and cemented carbide will be improved.
Diamond coating (Diamond)
The diamond coating is the best coating for non-ferrous metal machining tools. It is an ideal coating for machining graphite, metal-based composites (mmc), high silicon aluminum alloy and high abrasion materials .(Pure diamond coated tool can not process steel parts, processing steel parts will produce a large amount of cutting heat, and lead to chemical reaction, so that the adhesion layer between the coating and the tool is destroyed). The coatings used for hard milling, tapping and drilling are different and they are used in specific cases. In addition, there are multi-layer coatings, such coatings are embedded between the surface layer and the tool substrate, which improves the tool life.
Oxidation coating (Homo)
The tool is heated in a water vapor of 500~550 oc for 30~60 minutes to form a fe3o4 layer on the surface of the tool, which is an oxidation treatment method with the thickness of the oxide skin film in the range of 1~3μ. Because of its porous nature, the film can keep the cutting oil and reduce the friction heat. It is very effective for hard cutting materials, high tensile steel, stainless steel and cast iron.
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