Performance of deep cryogenically treated and non-treated PVD inserts in milling

Purpose: The purpose of the research was to analysis the tool performance between cryogenic treated and non-treated PVD inserts by milling process on Inconel 718 material in terms of surface roughness and tool wear. Design/methodology/approach: The methodology adopted is milling process with various cutting parameters like cutting speed, feed rate and constant depth of cut. Cutting speeds are 20,30,40 m/min with feed rate 0.05, 0.08 & 0.10 mm/ tooth and constant depth of cut is 0.50 mm. Findings: From the experimental work, the results were encouraging and performance is analysed on surface roughness and tool wear. Cryogenic treated inserts performed better than non treated inserts. Treated PVD inserts produced low surface roughness at high cutting speed with low feed rate. PVD treated inserts formed low flank wear where as untreated inserts formed more flank wear. Chips produced were saw tooth chips. Research limitations/implications: There are some limitations in carrying out this work due to machine vibration. There was a constraint in measuring the crater wear of the tool. Originality/value: This experimental work will help other researchers to follow on flank and crater wear using cryogenic treatment. This process can be used for difficult to cut materials like Titanium.