Abstract
Minimum quantity lubrication (MQL) is one of the promising Green Manufacturing Technology to meet the challenge of machining difficult-to-cut material Inconel 182 which is deposited by Shield Metal Arc Welding (SMAW). Unlike the flood lubrication, in MQL, only a small amount of non-toxic biodegradable oil are directly sprayed to the cutting zone by compressed air, which can reduce friction coefficient and temperature. Wear performance of uncoated tool inserts and Physical Vapor Deposition (PVD) coated tool inserts are evaluated by comparison during up and down face milling Inconel 182 with different MQL nozzle positions. Results indicate that uncoated tool inserts are not suitable for face milling Inconel 182 in all lubrication conditions due to the severe flank wear and the catastrophic breakage. On the contrary, PVD coated tool inserts have longer tool life compared to uncoated ones in all lubrication conditions. MQL nozzle positioned at tool cut into workpiece and positioned at tool cut out of workpiece in down milling as well as MQL nozzle positioned at tool cut out of workpiece in up milling can effectively prolong tool life of PVD coated tool inserts, which can be selected as the optimal lubrication solution for face milling Inconel 182.
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