Effect of copper additions in directly quenched titanium–boron steels |
| |
Authors: | S K Ghosh A Haldar P P Chattopadhyay |
| |
Affiliation: | (1) Department of Metallurgy and Materials Engineering, Bengal Engineering and Science University, Shibpur, Howrah, 711 103, India;(2) R & D Division, Tata Steel Limited, Jamshedpur, 831 001, India |
| |
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: | |
本文献已被 SpringerLink 等数据库收录! |
|