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Journal of Materials Science

, Volume 42, Issue 22, pp 9453–9459 | Cite as

Effect of copper additions in directly quenched titanium–boron steels

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

Abstract

The present study concerns the effect of copper additions on the microstructural evolution and mechanical properties of directly quenched Ti–B steels. Ti and B are added as microalloying elements with an aim of achieving adequate austenite hardenability and Cu is added to retard the austenite (γ) → ferrite (α) transformation. Therefore, the microalloying and Cu additions together allow the transformation of austenite to occur at a lower temperature, resulting in a finer microstructure containing martensitic constituents. The direct-quenching route is adopted with an aim of facilitating the nucleation of the constituent phases from the deformed austenite. In order to circumvent the hot-shortness due to the Cu addition, 0.79 wt% Ni has been added to one of the 1.5 wt% Cu microalloyed steels. The present study has demonstrated that the Ni-containing 1.5Cu–Ti–B steel is capable of providing an attractive combination of strength and ductility comparable to the high strength varieties of HSLA steels in directly quenched condition.

Keywords

Ferrite Austenite Bainite Impact Toughness Prior Austenite 

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Copyright information

© Springer Science+Business Media, LLC 2007

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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