β Scribed by Z.Y. Wang; K.P. Rajurkar
No coin nor oath required. For personal study only.
This paper presents a technique for machining of advanced ceramics with liquid nitrogen LN2 cooled polycrystalline cubic boron Ε½ . nitride PCBN tool, titanium alloys, Inconel alloys, and tantalum with cemented carbide tools. With LN2 cooling, the temperature in the cutting zone is reduced to a lower range, therefore, the hot-strength and hot-hardness of the tool remain high, and the temperature-dependent tool wear reduces significantly under all machining conditions. The surface roughness of all materials machined with LN2 cooling were found to be much better than the surface roughness of materials machined without LN2 cooling after the same length of cutting.
π SIMILAR VOLUMES
Conventional cutting fluid serves both as a coolant and lubricant. In cryogenic machining, liquid nitrogen (LN2) is recognized as an effective coolant due to its low temperature; however, its lubrication properties are not well known. The focus of this study was to investigate how the friction betwe