奥氏体生长行为和预测模型的Ti微合金钢的模型
Jun Wang1, Man Liu1, Lifan Wang1
1The State Key Laboratory of Refractories and Metallurgy, Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China.
Materials (Basel, Switzerland)
|July 13, 2024
概括
这项研究开发了一种新模型,用于预测加热期间微合金钢中的奥氏体粒度增长. 该模型准确地预测了颗粒大小,为热处理过程提供了洞察力.
科学领域:
- 金与材料科学 金与材料科学
- 物理化学 物理化学
- 热力学是一种热力学.
背景情况:
- 之前的奥氏体颗粒生长研究经常使用固定的温度,在加热过程中缺乏定量分析.
- (Ti) 微合金元素通过碳化物沉和溶解来影响钢材的性能.
- 在非平衡加热过程中了解奥氏体颗粒生长动力学对于材料加工至关重要.
研究的目的:
- 开发一个在加热过程中在Ti微合金钢中奥氏体粒度增长的预测模型.
- 分析含有Ti的碳化物的扩散和沉行为.
- 为了研究加热速度和温度对奥氏体颗粒大小的影响.
主要方法:
- 基于扩散原理的Ti含碳化物扩散的分析.
- 结合降水和奥氏体生长模型,创建一个预测模型.
- 使用光学,扫描电子和传输电子显微镜进行实验验证.
- 在各种加热速率 (0.5100 °C/s) 下计算奥氏体颗粒大小.
主要成果:
- 建立了一个新型模型,用于在加热过程中预测Ti微合金钢中的奥氏体颗粒大小.
- 实验数据与模型的预测密切匹配,验证了它的准确性.
- 奥斯石的颗粒大小随着加热温度的增加而增加,但在长时间的异热保持下显示出最小的变化.
- 据估计,奥氏体粒的粗化温度在1100~1200°C之间.
结论:
- 拟议的模型提供了一种新的方法,用于在非平衡加热条件下预测奥氏体颗粒大小.
- 微合金元素的行为,特别是沉和溶解,决定了奥氏体颗粒生长动力学.
- 这些发现为优化Ti微合金钢的热处理过程提供了宝贵的见解.
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