Effects of tool coating materials and coating thickness on cutting temperature distribution with coated tools

Abstract

Coated tools are currently widely used tool technology in machining. The influence of tool coating on heat transfer has become an active field of research enjoying constantly increasing attention in the field of machining. This paper is devoted to the cutting temperature in machining H13 hardened steel with monolayer coated tools (TiN, TiAlN, and Al2O3) and multilayer coated tools (TiN/TiC/TiN and TiAlN/TiN). Equivalent composite thermal conductivity and thermal diffusivity of multilayer coated tools were calculated using the equivalent approach. The established heat transfer analytical models estimated coating temperature in turning. The effect of tool coating in steady and transient heat transfer was studied, as well as the cutting temperature distribution. It reveals that the tool coating material and coating thickness can influence the cutting temperature distribution of coated tool. Thermal conductivity of coating material affects the steady cutting temperature distribution, and thermal diffusivity of coating material affects the transient cutting temperature distribution of coating tools.

Ultrafine WC–Co cemented carbide end mills prepared by spark plasma sintering and wear mechanism in milling of AISI H13

“…Coated cemented carbide tools are an ideal tool for the precision machining of hardened steel due to their high oxidation and bond resistance, which reduce friction and heat between the tool and the machined material. 11 Ghani et al 12 investigated the properties of TiN-coated tools in the precision machining of AISI H13 steel under high-speed cutting conditions. The study revealed that a favorable surface roughness of approximately .4 μm was achieved with a cutting depth of .3 mm.…”

“…Coated cemented carbide tools are an ideal tool for the precision machining of hardened steel due to their high oxidation and bond resistance, which reduce friction and heat between the tool and the machined material 11 . Ghani et al 12 .…”

Measurement of Cutting Temperature in Interrupted Machining Using Optical Spectrometry

“…Zhang Shijun et al [7] proposed a new approach to improve the prediction of the temperature of coated cutting tools, resulting in a model that can be used to design coated tools. Jingjie Zhang et al [8] studied the effect of tool coating materials and coating thickness on the distribution of cutting temperature with coated tools, and observed that cutting temperature decreases with the increase in coating thickness of the same type. Moreover, they concluded that thermal conductivity and diffusion affect cutting temperature in transient and steady heat transfer.…”

Effects of Substrate Roughness on Microstructure and Fatigue Behavior of Plasma Electrolytic Oxidation-Coated Ti-6Al-4V Alloy

“…Ceramic coatings have extensive applications in cutting tools due to the higher hardness, wear resistance, and thermal stability [1]. For example, Al 2 O 3 -coated tools can effectively improve machining efficiency and machining accuracy [2,3].…”