INTERNATIONAL JOURNAL OF RESEARCH IN AERONAUTICAL AND MECHANICAL ENGINEERING WWW.IJRAME.COM ISSN (ONLINE): 2321-3051 Vol.12 Issue 8, August 2024 Pg:- 46 - 75 Mohammed Shahzeb Siddiqui and Dr.Shrikisan Parihar 46 Performance evaluation of cryogenically treated tungsten carbide tool in milling operation on OHNS material Mohammed Shahzeb Siddiqui 1 , Dr.Shrikisan Parihar 2 1 PG StudentDepartment of Mechanical Engineering, DIEMS,Chh.Sambhajinagar, Maharashtra, India 2 Asst. professorDepartment of Mechanical Engineering, DIEMS, Chh.Sambhajinagar, Maharashtra, India Author Correspondence: Old BhajiMandiBundalPuraBeed, +91-8857868504, shahzeb0296@gmail.com Abstract Improvement in wear resistance and hardness of cutting tool material is one of the most important challenges in machining operation. This issue can be overcome by improving the wear resistance and hardness by cryogenic treatment of tungsten carbide. In this work it is tried to study the effect of different soaking periods in cryogenic treatment of tungsten carbide. The experiments were conducted at temperature of 88K at different soaking periods of 8hrs, 20hrs, 24hrs and 30hrs, on commercially used tungsten carbide. Further efforts were made to quantify and confirm the effect of different soaking period along with the mechanism responsible for change in the hardness and wear resistance by measuring Rockwell hardness and weight loss during wear test. The obtained result shows that there is a significant decrease in weight loss of 8hr soaked sample out of different soaking periods but, there was no change in bulk hardness. The weight loss during sliding wear test indicates the cryogenically treated tungsten carbide is more wear resistance due to increase in population density of carbides. Microstructure analysis of worn surface reflects the mechanism behind the improvement of mechanical properties. Keywords:Cryogenic treatment, Soaking period, Tungsten carbide, Tool life. 1. Introduction The cryogenic treatment of steels is to expose the material to sub-zero temperatures so as to Impart or enhance the properties of the material. The literature describes the heat treatments mainly cryogenic treatments done on various types of tool steels. The Sequence of different heat treatment cycles followed by deep cryogenic treatment (DCT). The research conducted by a number of authors explains the effect of DCT on various material properties such as wear resistance, hardness, toughness and fatigue resistance, corrosion resistance in some cases. The mechanism of DCT has also been explained in later sections. M. Prabhakaran, D. Madan, C. Sivakandhan, K. Anandan, S. Marichamy: