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Journal of Materials Science

, Volume 44, Issue 2, pp 580–590 | Cite as

The influence of copper addition on microstructure and mechanical properties of thermomechanically processed microalloyed steels

  • S. K. GhoshEmail author
  • A. Haldar
  • P. P. Chattopadhyay
Article

Abstract

The present study concerns the influence of Cu addition on the microstructural evolution and mechanical properties of directly air-cooled microalloyed thin-gauge steel. For this purpose, 1.5 wt% Cu was added to a Ti–B microalloyed steel. It is known that Ni addition to Cu-containing steel is beneficial to eliminate hot shortness caused by Cu. Therefore, the effect of Ni addition (half that of Cu in wt%) on the microstructure formation and mechanical properties has also been studied. Microstructures and mechanical properties of the directly air-cooled steels have demonstrated that addition of 1.5 wt% Cu along with 0.8 wt% Ni in Ti–B microalloyed steel results in a dual phase-like microstructure, which yielded attractive tensile strength (746 MPa) and ductility (31%). However, Cu addition deteriorated the impact toughness of the directly air-cooled Ti–B microalloyed steels.

Keywords

Ferrite Austenite Martensite Dual Phase Steel Intercritical Annealing 

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.Department of Metallurgy and Materials EngineeringBengal Engineering and Science UniversityShibpur, HowrahIndia
  2. 2.R & D DivisionTata Steel LimitedJamshedpurIndia

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