Nanostructured wear-resistant coating for the composite turning inserts

Abstract

Abstract The article presents the results of study of microstructural and strength properties of developed nanostructured wear-resistant high-hardness coating with high strength characteristics, resistance to shock and vibration loads on the surface of cutting inserts for instrumental and high-speed steel turning treatment. The specificity of the turning operating conditions of the composite cutting tool inserts shows that the cutting inserts working surface should have such characteristics as high hardness, strengths, increased vibration resistance, resistance dynamic loads and thermal shock, as well as increased wear resistance. Therefore, one of the ways to solve this problem proposed in the report is applying a wear-resistant hard oxide phase nanostructured coating on the surface of the cutting edge of the composite cutting inserts. Technological modes were selected for the wear-resistant hard protective coating which provides high microhardness due to the nanostructure by magnetron sputtering deposition of the developed compositions that have high adhesion to substrates made of composite cutting turning inserts. The results are shown on the example of high-speed turning of 30KhGSA by using composite turning inserts with developed nanostructured wear-resistant hard protective coating.