Why are super hard coatings like TRD, CVD, and PVD popular among the industries?
Mankind has used steel since the Iron Age and has continued to improve it along with the evolution of the industries. We found that the more hard carbide particles in a tool steel provided, the better the abrasive resistance. As a result, “High Speed Cutting Steel” was developed in the late 19th century. However the high speed steel contained only 20% carbide. “Powder high speed material” introduced 40 years ago contained a maximum of only 30% carbide. “Tungsten Carbide” (WC) material (Cemented Carbide) was developed. This material contained 80-90% carbide, but had poor “machine-ability”. It became very brittle and this restricted its use.
