Comparative Analysis of Coated and Non Coated HSS Tool with Zinc, Nickel, and Chromium

Machining is the heart of any manufacturing process so coating material have been used in the coating of tool steels. The tool used is high speed steel and are coated with Zinc, Nickel and Chromium separately. The various reasons to coat cutting tools are to increase tool life and improve the surface quality of the product, and to increase the production rate. The advantage of Zi, Ni, Cr coating include high hardness, good ductility, excellent lubricity, high chemical stability and tough resistance to wear, corrosion and temperature. In this paper, the principle, advantage and limitation of various Zn, Ni, Cr coating processes are summarized. This paper involves of machining hardened steel using Zi, Ni, Cr, coated HSS cutting tool is studied. This paper discussed about the wear and also hardness factor after coating compared with conventional cutting tool(high speed steel).