The Assist Effect of Nitrogen Atmosphere on MQL Cutting Performance

Abstract

This paper investigates the effects of using nitrogen gas on Mist cutting. In this study we tried to improve the cooling effect of mist on cutting by using N2 gas to assist cooling. As a result, tool breakage was prevented when using carbide tools and a large reduction in tool wear was confirmed when using cermet tools. Our conclusion is that N2 gas assisted mist cutting reduces oxidation wear, which means that the cutting characteristics are better than in conventional mist cutting.

Machinability of Stainless Tool Steel using Nitrogen Oil-Mist coalant

“…This indicates that the later lubricant method (nitrogen-oilmist) is very practical lubrication for extending the tool life. These good results is attributed to the fact that nitrogen gas atmosphere retards oxidation due to the developed heat at cutting zone during machining, which leads to reduce the cutting temperature and extend the tool life [7]. Tool life of nitrogen-oil-mist at high level of cutting speed and feed rate seems to be moderately extended.…”

“…The result shows that the machining performance with nitrogen-oil mist was better than air-oil mist in terms of tool life and surface finish. Shizuka et al [7] investigated the use of nitrogen-oil-mist when turning carbon steel (AISI 1045) using both cemented carbide and cermet tools. It was found that N2 significantly reduces the oxidation that occurs at the chip and the tool interface, and the tool wear took place by different wear mechanisms such as adhesion, chipping and abrasion.…”