• lagisetty lokesh
• K.Govinda Rajulu

Tool life plays a critical role in increasing productivity in the machining industry and thus has important economic value. With the development newer materials for aerospace, marine, automobile industries it became inevitable to develop new cutting tool material properties with competitive performance and productivity. In this regard cemented carbide tools were developed to meet the modern machining requirements. But they failed miserably due to rapid wear in machining high strength and temperature resistance alloys. In this research work the influence of cryogenic treatment on different characteristics of CNMG 120408 MT TT8125 CEMENTED CARBIDE INSERT was studied, followed by performance evaluation in dry turning of Aluminum using untreated and Cryo treated carbide inserts. Cryogenic treatment refers to process of exposing the metals to temperature below -1800C and soaking for a predetermined period and then allowing ascending back to room temperature at slow cooling rates. Cryogenic treatments alters the mechanical properties like hardness, strength and wear resistance. In this work, the inserts are cryogenically treated at -1960C and are subjected to tempering in electrical furnace at temperature +1960C for 120 minutes followed by air cooling, furnace cooling. In this research work micro structural characterization and crystallographic orientation were studied with the help of Scanning Electron Microscopy (SEM) & Surface Roughness measurement by Talysurf surface profile measuring machine.

Cryogenic Treatment, Tempering, Carbide tool insert.

"MACHINING WITH CRYOGENICALLY TREATED CNMG 120408 MT TT8125 CEMENTED CARBIDE INSERT", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.73-80, March-2019, Available :http://www.jetir.org/papers/JETIR1903C11.pdf

"MACHINING WITH CRYOGENICALLY TREATED CNMG 120408 MT TT8125 CEMENTED CARBIDE INSERT", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp73-80, March-2019, Available at : http://www.jetir.org/papers/JETIR1903C11.pdf