Influence of Cr, Mn and Mo Addition on Structure and Properties of V Microalloyed Medium Carbon Steels

J. Mater. Sci. Technol. ›› 2012, Vol. 28 ›› Issue (11): 1053-1058.

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Influence of Cr, Mn and Mo Addition on Structure and Properties of V Microalloyed Medium Carbon Steels

Abdunnaser Fadel, Dragomir Glišic, Nenad Radovic, Djordje Drobnjak

Department of Metallurgical Engineering, Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia

Received:2011-11-16 Revised:2012-03-04 Online:2012-11-09 Published:2012-11-09
Contact: Nenad Radovic
Supported by:
Ministry of Education and Science of Serbia for financial support (Project OI174004) and Serbian Oil Company for supplying experimental material.

Abstract

Abstract:

The effect of austenitizing temperature and Cr, Mo and Mn addition on microstructure and mechanical properties of V microalloyed medium carbon steel has been studied by means of metallography and mechanical testing. The addition of Cr, Mn and Mo leads to a decrease in yield strength (YS) by approximate 100 MPa in comparison to the base steel. It is assumed that Mn and Mo increase hardenability by promoting the formation of bainitic sheaves (BS), i.e. by suppressing the formation of ferrite-pearlite and acicular ferrite (FP-AF). Cr at the level used in this work is not that e®ective. Presence and packet size of bainitic sheaves decrease the Charpy V-notch impact energy at 20 °C (CVN20) in comparison to ferrite-pearlite and acicular ferrite microstructures.

Key words: Medium-carbon steels , Chromium , Molybdenum , Manganese addition , Bainite , Acicular ferrite

Abdunnaser Fadel, Dragomir Gli?ic, Nenad Radovic, Djordje Drobnjak. Influence of Cr, Mn and Mo Addition on Structure and Properties of V Microalloyed Medium Carbon Steels[J]. J. Mater. Sci. Technol., 2012, 28(11): 1053-1058.

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Influence of Cr, Mn and Mo Addition on Structure and Properties of V Microalloyed Medium Carbon Steels

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