Review of Research on Titanium Oxides in Low‐Carbon Steel

Abstract

Titanium oxides, which act as nuclei for intragranular ferrite, are common inclusions in low carbon steel. The interlocking structure of intragranular ferrite greatly improves the mechanical properties of low carbon steel. To make the best use of this kind of oxide, we reviewed the types, sizes and distribution properties of effective titanium oxides that can promote intragranular ferrite nucleation. We summarized the control techniques of titanium oxides as follows: (1) Ti2O3 is one of the most effective of the common titanium oxides, followed by TiO and TiO2. The type of titanium oxide can be affected by controlling the Ti/O mass ratio in molten steel. (2) Titanium oxide with the size range of 0.4‐4 μm can effectively promote the nucleation of IGF or IAF, among them, titanium oxide about 1 μm is the most beneficial to IAF nucleation. (3) In order to obtain the titanium oxides with effective size, the precipitation of titanium oxides should be controlled during the solidification process, and this process can be achieved in the existing rapid solidification technology. Under the same conditions, the higher solidification rate can obtain finer titanium oxide.This article is protected by copyright. All rights reserved.