热力学加工用于提高HT9钢的机械性能
Thak Sang Byun1, David A Collins1, Timothy G Lach1
1Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
Materials (Basel, Switzerland)
|August 10, 2024
概括
高钢的改良热机械加工 (TMP) 提高了高温强度和断裂性. 通过特定的炼处理进行快速火,优化了用于先进核反应堆应用的微观结构.
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.
- 核工程 核工程是指核工程.
背景情况:
- 像HT9这样的费里特-马丁 (FM) 钢由于其强度和耐辐射性,对快速反应堆核心组件至关重要.
- 这些钢的传统热力学加工 (TMP) 导致在辐射下性能受到限制,包括脆化和降低高温强度/度.
研究的目的:
- 为了提高HT9钢的断裂性和高温强度.
- 通过快速火和新型炼,通过精细沉物获得超细状马氏体结构.
主要方法:
- 研究了快速火与非传统的炼策略相结合.
- 进行机械测试,以评估不同加工路径的强度和断裂性变化.
- 分析了微观结构的演变,专注于轮精炼和沉物特性.
主要成果:
- 量身定制的TMP,特别快速火与有限的炼,显著提高强度和保存的断裂性.
- 获得的强度与纳米氧化物强化铁合金相当.
- 确定了优越性质的火后最佳回火条件 (1小时500-600°C)
结论:
- 改进的钢化处理对于优化高级核反应堆中高Cr钢的性能至关重要.
- 快速火与精心控制的炼相结合,提供了一条克服传统TMP限制的途径.
- 建议修改炼协议,以提高HT9钢的强度和性,用于未来的反应堆应用.
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