Volume 12 Issue 3 - January 2019

  • 1. Machinability of en24 steel (817m40)

    Authors : Nikhil Bharat, Dr. Kalyan Chakraborty

    Pages : 1-7

    DOI : http://dx.doi.org/10.21172/1.123.01

    Keywords : Machinability; Chip thickness; Strain hardening; Von Mises stress;

    Abstract :

    EN24 steel is medium carbon steel containing high strength steel alloy, and the grade is a nickel-chromium-molybdenum combination (34CrNiMo6). The En 24 steel has good shock and impact resistance as well as wear and abrasion resistance in the hardened condition. The steel properties offer good ductility in the annealed condition, allowing it to be bent or formed. Fusion and resistance welding is also possible with this steel. It is often utilized where other alloy steels do not have the hardenability to give the strength required. For highly stressed parts it is an excellent choice. It provides a good combination of high tensile strength, with good ductility and wear resistance characteristics. EN24 is most acceptable for the production of parts such as heavy-duty axles and shafts, gears, bolts, studs and it is capable of retaining good impact values at low temperatures. The paper presents the experimental study on machinability of the EN24 steel. During experimentation, chemical vapour deposition (CVD) coated carbide tool was used. The input parameters are speed, feed and depth of cuts and chip reduction coefficient, material removal rate (MRR) and Von Mises stress are the output responses. The input parameters were assigned with code and arranged in 3^3 factorial design, according to the Design of Experiment (DOE). Strain hardening exponent and strength coefficient are the material properties that were evaluated from the true stress-true strain curve and with the use of these properties corresponding Von Mises stress was calculated, and further analysis was done. From the study, it showed that high cutting speed is the favourable condition for machining with EN24 steel.

    Citing this Journal Article :

    Nikhil Bharat, Dr. Kalyan Chakraborty, "Machinability of en24 steel (817m40)", https://www.ijltet.org/journal_details.php?id=942&j_id=4743, Volume 12 Issue 3 - January 2019, 1-7, #ijltetorg