Formation of fine intragranular ferrite in cast plain carbon steel inoculated by titanium oxide nanopowder

被引：70
作者：
Nedjad, S. Hossein [1 ]
Farzaneh, A. [1 ]
机构：
[1] Sahand Univ Technol, Fac Mat Engn, Tabriz, Iran
来源：
SCRIPTA MATERIALIA | 2007年 / 57卷 / 10期
关键词：
steel; non-metallic inclusions; intragranular ferrite; titanium oxide; nanopowder;
D O I：
10.1016/j.scriptamat.2007.07.016
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of titanium oxide nanopowder on the microstructure of a plain carbon steel was studied. Remelted base steel showed a microstructure consisting of coarse pearlite and minor allotriomorphic ferrite. After inoculation the volume fraction of ferrite increased considerably. Further, the ferrite was grain-refined down to about 3 mu m in the as-cast condition. Carbon oxidation during melting is proposed to thermodynamically favor a higher volume fraction of ferrite. Titanium oxide nanoparticles refine ferrite grains presumably by virtue of augmented nucleation and retarded growth. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：937 / 940
页数：4
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