Laser Modification of Metal Cutting Tool: Assessment of the Influence on Wear Resistance and Quality of the Processed Surface

• Published in: Key engineering materials 2020-03, Vol.836, p.118-123
• Main Authors: Shastin, V.I., Kargapol’tsev, S.K., Gozbenko, V.E.
• Format: Article
• Language: English
• Subjects: Amorphization; Cutting resistance; Cutting tools; Cutting wear; Drill bits; Hardening; High speed tool steels; Inserts; Lasers; Mechanical properties; Metal cutting; Parameters; Phase transitions; Resistance factors; Surface layers; Surface roughness; Tool wear; Wear resistance
• ISSN: 1013-9826; 1662-9795; 1662-9795
• DOI: 10.4028/www.scientific.net/KEM.836.118

The paper reflects the relevance of hardening the working surfaces of the tool, where the surface layer plays a fundamental role. The main factors determining the wear resistance of the tool and their influence on the quality of the processed surface are analyzed. The purpose of the research is to study the effect of laser modification of tool alloys on wear resistance and on the roughness parameters of the machined surface. A small-sized drill bit (steel P6M5) and carbide inserts T15K6 are used as objects of research. The paper presents the results of experimental studies on the impact of laser radiation on the microstructure of materials, indices of wear resistance and quality parameters of the treated surface. It is established that there is a certain relationship between these indices. The modes of laser modification of the tool most acceptable for practical use are determined. Along with an increase in the wear resistance of a metal-cutting tool, a manifestation of the effect of an increase in surface roughness indices is found and experimentally confirmed. It is established that hardening of the surface layer is caused by structural and phase transformations with enhanced physical and mechanical properties, and the roughness indices depend on the degree of dispersion (amorphization) of the modified layer.