Mechanical characterization of Heat treated en 9 steel

Kini, Achutha U and Sharma, S S and Nayak, Suhas Y and Shenoy, Srinivas H (2017) Mechanical characterization of Heat treated en 9 steel. In: International Conference on Engineering and Information Technology, 17th - 18th March 2017, Kuala Lampur, Malaysia.

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EN 9 (AISI 1015) is a low carbon steel having general engineering applications that includes blades for axes, knives, and sickles as well as shafts, bushes, crankshafts, screws and wood working drills. In normalised condition, it can be used for gears, sprockets and cams. The purpose of heat treatment is to soften the metal, to change the grain size, to modify the structure of the material and relive the stresses set up in the material during manufacturing. In the present work, annealing, normalizing and hardening treatments are given to EN 9 steel. The mechanical properties (Hardness, Tensile and Impact strengths) are determined and compared in untreated and heat treated conditions. Microstructure study is also performed on as bought and heat treated specimens. It is found that hardness increases substantially with hardening treatment and decreases marginally with annealing and normalizing treatments compared to as bought condition. An increase of more than two fold is observed in tensile strength of hardened specimen and three fold increase in % elongation for annealed specimen in comparison with as bought specimen. Impact strength increases in the order: Normalizing > Annealing > Hardening treatments.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Medium carbon Steel, Hardness Test, Tensile Test, Heat Treatment
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 01 Apr 2017 10:43
Last Modified: 01 Apr 2017 10:43

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