The formation of the cutting tool microgeometry by pulsed laser ablation

Abstract

Laser ablation is considered as an alternative to other methods that allow precise processing of various tool materials and work with both the base material and thin films of wear-resistant coatings. This article presents an investigation of the possibility of setting the microgeometry of the surface of cutting tool made of high-speed steel M2 and hard alloy WCCo3 using ablation with nanosecond infrared marking Nd:YVO4 laser. Dependencies of the width and depth of the resulting tracks on the specified laser power are obtained. It was revealed that their depth depends on a set of several specified factors: power, scanning speed, pulse frequency rate, and a number of passes. The modes with a radiation power of up to 70% are of interest for the treatment of the tool surface using a laser because they have a more predictable profile and more efficient energy distribution. The most uniform and smooth surface were obtained after laser treatment with the following parameters: power 60%, frequency 10 kHz, scanning speed 200 mm/s irrespective of the material being processed. The greater flexibility of the coating material for laser processing was observed. The depth of tracks on the coated (TiAl)N samples is larger than on the uncoated samples. The possibility to obtain a chamfer with the specified width and angle parameters by laser processing based on the obtained dependencies is demonstrated.

Technological Principles of Complex Plasma-Beam Surface Treatment of Al2O3/TiC and SiAlON Ceramics

“…However, the share of industrial use of ceramics in the total global market for structural and tool materials is small despite all their known advantages [9,10]. The broader distribution of ceramics in the industry is hampered by their inherent disadvantages, such as primarily fragility and complexity in shaping processes [11,12]. The limitations of ceramics are especially pronounced when there is a combination of increased thermal and mechanical loads when accelerated microdestruction of the contact surfaces of ceramic products is often observed.…”

Improving the Efficiency of Metalworking by the Cutting Tool Rake Surface Texturing and Using the Wear Predictive Evaluation Method on the Case of Turning an Iron–Nickel Alloy

“…They can associate with the use of new cutting strategies, the development of new tool materials and systems, progressive lubricating and cooling technological means (LCTM), and methods of modifying the working surfaces of the tool, which are one of the foremost modern directions for improving efficiency. At the same time, approaches are used for surface alloying [1,2], application of protective wear-resistant coatings [3][4][5][6][7], and various kinds of energy effects designed to provide the required structural and chemical changes or to affect the macro-and micro-geometry of the instrument [8][9][10].…”