The Effect of Cooling Rate on Microstructure and Mechanical Properties of GS20Mn5 Steel Used for Manufacturing of Cast Bogie

Hasanpour, Mohammad; Owhadi, Amin; Boutorabi, Seyed Mohammad Ali

doi:10.22068/IJRARE.6.2.73

Volume 6, Issue 2 (12-2019) IJRARE 2019, 6(2): 73-82 | Back to browse issues page

‎ 10.22068/IJRARE.6.2.73

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Hasanpour M, Owhadi A, Boutorabi S M A. The Effect of Cooling Rate on Microstructure and Mechanical Properties of GS20Mn5 Steel Used for Manufacturing of Cast Bogie. IJRARE 2019; 6 (2) :73-82
URL: http://ijrare.iust.ac.ir/article-1-250-en.html

The Effect of Cooling Rate on Microstructure and Mechanical Properties of GS20Mn5 Steel Used for Manufacturing of Cast Bogie

Mohammad Hasanpour

, Amin Owhadi

, Seyed Mohammad Ali Boutorabi

School of Railway Engineering, Iran University of Science and Technology, Tehran, Iran

Abstract: (1648 Views)

The GS20Mn5 steel is a low carbon manganese steel used for cast freight bogies manufacturing. The impact toughness of such steels for freight bogie solebars must be at least 17J/cm² at -60°C according to GOST32400 standard. In the present work, the effect of cooling rate after the austenitizing at two temperatures on the structure and mechanical properties of GS20Mn5 steel is investigated, including toughness at -60°C. The cooling rate varies from 1 to 5.4°C/Sec. The optimum toughness and strength are observed after two hour austenitizing at 930°C and quenching rate of 2.8°C/Sec where the impact energy mean values reached 32J/cm² at -60°C.

Keywords: Heat treatment, Mechanical properties, Cast Bogie, GS20Mn5 steel, Low temperature

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Type of Study: Research | Subject: Railway track and structures