Evaluation of Mechanical Properties of Medium Carbon Low Alloy Forged Steels Quenched in Water, Oil and PolymerChandan BR* and Ramesha CM
Department of Mechanical Engineering, MS Ramaiah Institute of Technology, Bangalore, Karnataka, India
- *Corresponding Author:
- Chandan BR
Department of Mechanical Engineering
MS Ramaiah Institute of Technology
Bangalore, Karnataka, India
E-mail: [email protected]
Received Date: November 06, 2016; Accepted Date: January 25, 2017; Published Date: February 04, 2017
Citation: Chandan BR, Ramesha CM (2017) Evaluation of Mechanical Properties of Medium Carbon Low Alloy Forged Steels Quenched in Water, Oil and Polymer. J Material Sci Eng 6: 320. doi: 10.4172/2169-0022.1000320
Copyright: © 2017 Chandan BR, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Medium carbon low alloy forged steels (EN 18, EN19, EN 24, and EN25) have been investigated with respect to their mechanical properties after heat treatment. For heat treatment solutionizing temperature of 855°C with a soaking period of 60 min was used. Thereafter quenching was carried out in three media, viz., Step water, oil and polymer (polyethylene glycol) separately. The quenched samples were step tempered at 575°C and at 220°C sequentially for 60 min each. Hardness, tensile strength, Charpy impact strength and metallographic were carried out on the untreated and heat treated specimens. The heat treated specimens showed higher hardness (10-30%), higher strength (20-100%) and higher impact energy (20-160%). The specimens quenched in poly ethylene glycol exhibited the best mechanical properties. The heat treated specimens had a structure of fine tempered martensite with small amount of bainite.