Determination of the Strain Chasracter and Hardening of the Surface with Nano-Coating
Nanocoatings of CrN and WC are used to harden a cutting tool used in the processing industry. A method describing the imprint formation upon indentation of nanocoatings and character of deformation around them is developed. Mathematical processing of images obtained upon microhardness measurements revealed zones of plastic deformation around the imprint of the indenter in the material without coating. Coating of the disk knife surface increases hardness, thus preventing plastic deformation. Comparative study of nano- and microhardness demonstrated the possibility of reliable evaluation of the microhardness of the coatings at different loads and challenges in the measuring process.