1Department of Production Technology, MIT, Anna University, Chennai, India.
2Department of Production Engineering, Sethu Institute of Technology, Kariapatti, Tamilnadu, India.
3Department of Mechanical Engineering, Thiagarajar College of Engineering, Madurai, Tamilnadu, India.
* Corresponding Authour.
The major needs in machining are high material removal rate, good surface finish and better tool life. These objectives can be achieved by reducing tool wear during machining. Cryogenic treatment is being used for the purpose of extending tool life, toughness, and wear resistance and it is one of the effective secondary processes to improve the performance of cutting tool. Cermet cutting tools have a balanced combination of hardness and toughness, excellent thermal crack resistance and wear resistance and it is widely used for machining cast iron and steels. Cryogenic treatment was carried out on Ti(C,N) based cermet cutting tool to analyse its effect on the performance of cermet cutting tool. Machining studies were carried out on AISI 4340 steel hardened to 45 HRC in a precision lathe at different cutting speeds and at constant feed and depth of cut. Flank wear, crater wear of the cutting tool and surface roughness of the machined surface were observed to comparatively analyse the performance between cryogenically treated cermet tool and untreated cermet tool. Cryogenically treated cermet cutting tool exhibited better wear resistance and produced lower surface roughness than the untreated cermet tool.
Cryogenic treatment, cermet tool, Tool wear, Surface roughness, Chip formation
