• POBBITHI YAGANTESWARA
• PIKKLI SREENIVASULU

In this research paper, the influence of cryogenic treatment on different characteristics of CNMG 120408 MT TT8125 CEMENTED CARBIDE INSERT is presented. Further the performance in dry turning of Aluminum using untreated and cryo treated carbide inserts were evaluated. Microstructural characterisation and crystallographic orientation were studied with the help of scanning electron microscopy (SEM) and X-ray diffraction (XRD) respectively. The results indicated that cryo treatment resulted in formation of hard and wear resistant η phase. At the same time, the concentration of binder phase i.e. cobalt on the top surface region increased. The turning tests were conducted at three different cutting speeds (500, 600, and 700 rpm.) while feed rate and depth of cut were kept constant at 0.2 mm/rev and 0.5 mm, respectively. The influences of cryogenic treatment were investigated on the flank wear and chip characteristics. Both the worn parts of the cutting tools as well as the chips were also examined using SEM. The results showed that cryogenic treatment significantly improved the surface finish. The cryogenically treated demonstrated superior resistance to tool wear compared to its untreated counterpart in the entire range of cutting speeds. The chip thickness along with chip reduction coeffiecient was found to decrease for cryogenically treated insert compared to those for untreated insert during dry turning of Aluminum

Cryogenic treatment, cemented carbide, microstructure, dry turning, tool wear.

"MACHINING WITH CRYOGENICALLY TREATED CEMENTED CARBIDE INSERT", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 12, page no.928-937, December-2020, Available :http://www.jetir.org/papers/JETIR2012329.pdf

"MACHINING WITH CRYOGENICALLY TREATED CEMENTED CARBIDE INSERT", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 12, page no. pp928-937, December-2020, Available at : http://www.jetir.org/papers/JETIR2012329.pdf