在现场观察 Y 对 7Mo-SASS 在低冷却速率下固化过程的影响
Wenqiang Liu1, Lijun Wang1, Qi Wang2
1The Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China.
Materials (Basel, Switzerland)
|November 14, 2023
概括
的添加增强了奥氏体核化,并在低冷却速率固化过程中提炼了7Mo超奥氏体不钢 (7MoSASS) 的微观结构. 这导致更均的固化结构和减少沉阶段.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是一种金工业.
- 固化科学 固化科学
背景情况:
- 超奥氏体不钢 (SASS) 在苛刻的环境中至关重要.
- 控制固化微结构是材料性质的关键.
- 低冷却速率固化对微观结构的发展提出了独特的挑战.
研究的目的:
- 研究 (Y) 在低冷却速率下对7MoSASS的固化过程的影响.
- 了解Y在奥氏体核和微观结构进化中的作用.
- 分析Y对阶段沉和元素分离的影响.
主要方法:
- 高温共聚焦激光扫描显微镜 (HT-CLSM) 用于现场观察.
- 差异分析以评估微观结构的统一性.
- 约翰逊-梅尔-阿弗拉米-科尔莫戈罗夫 (JMAK) 理论用于核化动力学.
- 用能量分散光谱 (SEM-EDS) 扫描电子显微镜进行元素分析.
主要成果:
- Y的加入显著增加了奥氏体核化密度 (149.53 / mm2在10秒).
- Y提高了7MoSASS固化微观结构的统一性.
- 核化模式转移,YAlO3作为一个异质核化核心.
- Y精炼了微观结构,减少了约7.5%的沉相.
- Y改变了元素分离,增加了Cr和减少了Mo分离.
结论:
- 有效地促进了奥氏体核化,并在低冷却速度下完善了7MoSASS的固化微结构.
- 的添加增强了凝固的均性,并改变了元素分离的行为.
- 像YAlO3这样的以为基础的化合物作为有效的异质核化场所.
关键词:
7Mo奥氏体不钢不钢的使用情况在JMAK中,JMAK就是JMAK.没有,没有,没有.与焦点一致的激光扫描显微镜低冷却速度的低冷却速度精炼 refinement 精炼 refinement 精炼 refinement 精炼 refinement 精炼 refinement 精炼 refinement 精炼 refinement 精炼 refinement 精炼 refinement 精炼固化过程中的固化过程.更多相关视频
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