Effect of Solute Drag and Precipitate Pinning on Austenite Grain Growth in Ti-Nb Microalloyed Steels

被引：0
|
作者：
FU Li-ming 1
2.Department of Structural Steels
机构：
来源：
Journal of Iron and Steel Research(International) | 2011年 / 18卷 / S1期
关键词：
grain growth; precipitates pinning; solute drag; Ti-Nb microalloyed steels;
D O I：
10.13228/j.boyuan.issn1006-706x.2011.s1.086
中图分类号：
TG142.33 [合金钢];
学科分类号：
080502 ;
摘要：
A metallurgical model concerning the co-effect of the Nb solute drag and the complex carbonitride precipitates pinning is proposed to predict the recrystallization austenite grain growth of low carbon Nb-containing microalloyed steels.The analysis,both predicted and experimental,reveals the precipitate pinning plays a dominate role in suppressing the austenite grain growth with less Nb solute drag effect in high temperature region whereas the Nb solute drag predominates in relatively low temperature region.A factor p is suggested to assess the effectiveness of drag and pinning.The pinning and the drag are more effective in restraining grain growth as p>0 and p<0,respectively.A low carbon Nb microalloyed steel and a kind of Ti-modified low carbon Nb steel by Ti substituting for part of Nb are employed to validate the modeling results.The theoretical calculations show a good agreement with experimental results.
引用
收藏
页码：383 / 387
页数：5
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