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Research Paper | Mechanical Engineering | Volume 15 Issue 6, June 2026 | Pages: 573 - 581 | India
Evaluation of Surface Roughness of Medium Carbon Low Alloy Forged Steels Quenched in Polymer
Abstract: Medium carbon steels are similar to low carbon steels except that the carbon ranges from 0.30 to 0.50% and manganese from 0.60 to 1.65% [1]. The uses of medium carbon steels include shafts, axles, gears, crankshafts, couplings and forgings. Steels of 0.40 to 0.60% C range are used for rails, railway wheels and rail axles. Therefore, medium carbon low Alloy steels have found enormous application aerospace, structural in automotive, engineering, agricultural engineering, railways, marine and power sectors due to high strength and specific mechanical properties. EN18 (AISI 5140), EN19 (AISI 4140), EN 24 (AISI 4340) and EN25 (AISI 3430) are MCLA steels under High Strength Low Alloy (HSLA) category. In some applications, there is a need to increase the strength along with the high ductility. In practice, heat treatment is the process by which changes in mechanical properties can be achieved. It mainly depends on the microstructural transformation, the microstructural changes occurring at different heat treatment conditions [2] with varying holding time and varying tempering temperature. The final end structure of the heat-treated components decides the applications where it can be used with the environmental conditions. The synthetic polymer quenchant, polyethylene glycol (PEG) [3]. has the advantages of lesser risk of cracking and less distortion, resulting in better mechanical properties compared to untreated samples.
Keywords: EN Steels, Heat Treatment, Polymer Quenching, Forged Steels, Surface Roughness
How to Cite?: Chandan B R, Shashank S, "Evaluation of Surface Roughness of Medium Carbon Low Alloy Forged Steels Quenched in Polymer", Volume 15 Issue 6, June 2026, International Journal of Science and Research (IJSR), Pages: 573-581, https://www.ijsr.net/getabstract.php?paperid=SR26608200933, DOI: https://dx.dx.doi.org/10.21275/SR26608200933