Influence of the properties of a multilayer nanostructured coating Ti-TiN-(Ti,Cr,Mo,Al)N on the wear resistance of a cutting tool when turning steel

• Main Authors: Grigoriev, Sergey, Vereschaka, Alexey, Milovich, Filipp, Andreev, Nikolay
• Format: Conference Proceeding
• Language: English
• Subjects: Aluminum; Chromium; Coating effects; Crack propagation; Crystal structure; Cutting resistance; Cutting tools; Cutting wear; Diffusion barriers; Diffusion coating; Diffusion layers; Interlayers; Iron oxides; Molybdenum; Multilayers; Nanostructure; Oxidation; Steel; Titanium; Tool wear; Turning (machining); Wear resistance
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0222426

The article presents the results of a study of the process of tool wear with a multilayer nanostructured wear-resistant coating Ti-TiN-(Ti,Cr,Mo,Al)N during steel turning. Particular attention is paid to the study of the diffusion of iron from the processed material into the coating and coating elements into the processed material. It was found that the diffusion of iron into the nanolayer structure of the coating has a periodic decaying character. Coating nanolayers with a high Cr-Mo content exhibit the best barrier functions with respect to iron diffusion. The active oxidation of the layer of the processed material in contact with the coating was established, while the formation of individual grains of iron oxide, which can have an abrasive effect on the coating surface, is noticeable. The diffusion of iron into the coating to a depth of 600 nm and the diffusion of elements of the coating (primarily chromium) into the processed material to a depth of 100 nm was established. The process of crack formation in the coating and the role of the crystal structure and interlayer interfaces in the inhibition of crack propagation are investigated.