Investigations of the effect of heat pipes on the temperature reduction and fatigue life of the components in the turning of high carbon high chromium steels

Abstract

In the present work the twisted Mild steel pipes of lesser and little higher twists are employed for the passive cooling purposes to reduce the temperature at the chip tool interface. It is found that, the pipe of higher twist has resulted in the greater reduction of temperature as compared to that of the lower twist. Further in this work, the twisted mild steel heat pipes of diameters 4 mm, 6 mm, 8 mm and 10 mm were accommodated in HSS carbide tipped tool and the turning of HCHCR work pieces were carried out on a conventional lathe. It is noticed that, the temperature near the cutting zone reduced with the increase in the diameter of the heat pipe. In this work, the effect of diameter of the heat pipe on the fatigue life of the machined parts is also studied. The results shows that, the increase in the diameter of the heat pipe increases the fatigue life of the machined component. Finally in this work, the effect of mass flow rate of the cutting fluid on the fatigue life of the turned HCHCR component using a heat pipe of diameter 6 mm is studied. It is observed that, the increase in the mass flow rate increases the fatigue life of the machined HCHCR component.