添加Ce-Y复合材料对T91耐热钢的包含演变的影响
Jun Liu1,2, Gen Li2, Chengbin Shi1
1State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian District, Beijing 100083, China.
Materials (Basel, Switzerland)
|April 24, 2025
概括
稀土元素 (Ce) 和 (Y) 显著改进了T91钢中的含有物,减少了它们的尺寸并改变了它们的组成. 优化Y/Ce比率可以最大限度地减少不必要的碳化物,提高钢材的性能.
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:
- T91钢通常含有Mg-Al-O氧化物和 (Nb,V,Ti) (C,N) 碳化物,通常具有利的边缘.
- 钢中的含有物可能会对机械性能和性能产生负面影响.
- 众所周知,稀土元素可以修改包含特征.
研究的目的:
- 为了研究 (Ce) 和 (Y) 对T91钢的入演变的影响.
- 了解含有稀土的含的形成机制和变化.
- 为优化稀土添加用于提高钢材性能提供理论指导.
主要方法:
- 具有不同Ce-Y含量的实验钢在真空感应炉中化.
- 纳入分析是使用热力学计算和不匹配分析进行的.
- 进行了包含的微观结构性表征.
主要成果:
- 添加Ce和Y显著降低了钢的氧含量,并改进了包括在球形稀土氧化物,硫化物和氧硫化物中的含量.
- 平均含量大小从2.8微米 (没有稀土) 减少到1.7-1.9微米,增加了Ce-Y.
- Ce2O3被确定为碳化物潜在的核核,而其他稀土含有物则不那么有效.
结论:
- 通过控制Ce2O3的形成,Ce-Y复合材料的添加提炼了含有物,并减少了有害的初级碳化物.
- 增加Y/Ce比率对于最大限度地减少Ce2和O3以及避免初级碳化物沉至关重要.
- 这项研究为设计和生产具有增强分散增强的先进稀土钢提供了理论见解.
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