Performance Analysis of TiAlSiN Coated Tungsten Carbide End Milling Tool Subjected to Shallow and Deep Cryogenic Treatments

Abstract

Cryogenic treatment enhances the properties of cutting tools. This study investigates the effects of shallow and deep cryogenic treatments to TiAlSiN coated tungsten carbide tool used in end milling of maraging steel C300. Experiments are conducted in a three axis CNC vertical milling machine at various spindle speeds using TiAlSiN coated tool without cryogenic treatment (UCT), shallow (SCT) and deep (DCT) cryogenically treated coated tools. The surface finish obtained during milling of slots, built-up edge of tools and the tool wear are investigated and compared. With an increase in spindle speed, SCT tool showed an improvement of 13.3% with UCT and 33.5% with DCT. Formation of built-up edge on the cutting tools are also evaluated and compared. Tool wear is quantified, in which SCT tool showed lowest tool wear in comparison with UCT and DCT tools.

Keywords

• Cryogenic treatment
• Micro structure
• Tungsten carbide tool
• TiAlSiN Coating
• Surface roughness
• End milling
• Tool wear