Comparative study of metallurgical and machinability characteristics of boronised and coated tungsten carbide inserts using EN19 steel as workpiece

Tungsten carbide is one of the cutting tools which has good wear resistant, abrasion resistant and better toughness during normal machining. To improve its tool life and also the surface finish of the machined component, various types of coatings such as TiAlN, TiN + AlCrN, TiN + TiAlN by physical vapour deposition (PVD) technique and boronising operation were being employed on WC substrate cutting tools. XRD analysis was carried out to check the peaks and phases of the boronised tools. SEM analysis was performed to check the microstructure images and the coating thickness. Hardness test was conducted to check the micro-vickershardness for the coated and boronised samples. Corrosion test was carried out to check the corrosion rate of the coated inserts. Machining studies were carried using EN19 workpiece material with different tools under study. Surface roughness of the workpiece was measured on the workpiece for the different coated tools. The better suitable coated tool was selected for machining EN19 alloy steels. (C) 2020 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Conference on Materials, Manufacturing and Mechanical Engineering for Sustainable Developments-2020.