在Nb-V微合金钢中再结晶和第二阶段沉:热模拟研究
Qilin Ma1,2, Shubiao Yin3, Chengjia Shang2
1Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China.
Materials (Basel, Switzerland)
|July 12, 2025
概括
这项研究表明,与 (Nb) 钢相比,- (Nb-V) 微合金钢在粗过程中表现出优越的颗粒精细化. 在Nb-V钢中微细 (Nb,V) C颗粒的增强沉显著改进了奥氏体颗粒大小.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 物理化学 物理化学
背景情况:
- 了解奥氏体再结晶和第二阶段沉对于高性能微合金钢来说至关重要.
- (Nb) 和- (Nb-V) 微合金是精炼谷物和增强沉的关键策略.
- 变形,温度和微合金元素之间的相互作用影响了钢铁微结构的演变.
研究的目的:
- 研究Nb-V微合金钢的再结晶行为和第二阶段沉之间的关系.
- 分析变形量和温度对奥氏体再结晶的影响.
- 评估Nb-V微合金对第二阶段降水特性和动力学的影响.
主要方法:
- 进行了热模拟实验,以研究钢在粗滚动过程中的行为.
- 用热力学和动力学计算来分析微合金对降水的影响.
- 微结构分析的重点是奥氏体再结晶,谷物精炼和第二阶段沉物特性.
主要成果:
- 变形量和温度都对奥氏体再结晶有重大影响.
- 与Nb钢相比,Nb-V微合金钢表现出更明显的颗粒精炼.
- 与Nb钢的NbC (33.85 nm) 相比,Nb-V钢主要是沉 (Nb,V) C,具有较小,均分散的颗粒 (10.60 nm).
结论:
- Nb-V微合金加快了第二阶段沉动力学,并比单独的Nb更有效地提炼了奥氏体颗粒大小.
- 在Nb-V钢中的细二相颗粒显著阻碍了颗粒边界运动,超过了固体溶液原子的影响.
- 这些发现为设计高性能微合金钢提供了洞察力,通过控制降水和谷物精炼来设计高性能微合金钢.
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