Effect of Intercritical Heat Treatment on Mechanical Properties of Reinforcing Steel Bars

Muhammad Ishaque Abro; Riaz Ahmed Memon; Imtiaz Ali Soomro; Umair Aftab

doi:10.22581/muet1982.1703.15

Muhammad Ishaque Abro Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology, Jamshoro.
Riaz Ahmed Memon Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology, Jamshoro.
Imtiaz Ali Soomro Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology, Jamshoro.
Umair Aftab Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology, Jamshoro.

DOI: https://doi.org/10.22581/muet1982.1703.15

Keywords: Reinforcing Steel., Intercritical Heat Treatment, Mechanical Properties

Abstract

Intercritical heat treatments attempts were made to enhance the mechanical properties of reinforcing steel bars milled from scrap metal. For this, two grades of steel bars were obtained from different steel mills and their mechanical properties that include hardness, ultimate tensile strength, and percent elongation before and after intercritical heat treatment were determined. Results indicated that 25.5 and 17.6%, improvements in UTS (Ultimate Tensile Strength) and 18.8 and 14.3% improvement in percent elongation in two grades of reinforcing steel samples containing 0.17 and 0.24% carbon respectively was achieved while heating at 750oC for 2h. Appreciable improvement in the mechanical properties was noted due to birth of sufficient quantity of martensite along with ferrite.