在连续冷却过程中,Fe-22Mn-9Al-0.6C低密度钢中的二次阶段沉
Yihao Zhou1, Tinghui Man1, Jun Wang1
1School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China.
Materials (Basel, Switzerland)
|April 9, 2024
概括
本研究研究了Fe-22Mn-9Al-0.6C低密度钢在连续冷却过程中的二次相沉. 较慢的冷却速率促进了特定的相位形成,影响了钢材.
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.
背景情况:
- 低密度Fe-Mn-Al-C钢是先进的材料,在各种工业中具有潜在的应用.
- 了解二次相沉对于优化其机械性能和加工至关重要.
研究的目的:
- 在不同速率的连续冷却下研究Fe-22Mn-9Al-0.6C钢的二次阶段沉.
- 分析冷却速度对微观结构和硬度的影响.
- 阐明 κ-碳化物,β-Mn 和 DO3.3 等二次相的形成机制.
主要方法:
- 使用DIL805A热膨胀扩散计来研究连续冷却.
- 在不同的冷却速度下分析了微观结构变化和硬度变化.
- 在热膨胀曲线上采用触角法来确定降水温度.
主要成果:
- 该矩阵由奥氏体和δ-铁素组成,在室温下 κ-碳化物,β-Mn 和 DO3 作为二次相.
- 确定B2, κ-碳化物和β-Mn的降水温度分别为858°C,709°C和495°C.
- 较慢的冷却速度 (例如0.03°C/s) 导致由于 κ-碳化物和 β-Mn 沉和碳丰富而导致奥氏体硬度增加.
结论:
- 二次阶段沉 (κ-碳化物,DO3,β-Mn) 在奥氏体/铁矿界面发生在0.1°C/s以下.
- 在超过0.1°C/s的冷却速度下, κ-碳化物和β-Mn的沉受到阻碍.
- 这些发现为工业生产Fe-Mn-Al-C低密度钢的热加工工艺设计提供了指导.
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