通过使用3D处理地图来确定Fe-Cr-Mo-Mn钢的热可加工性和微观结构演变
Cunchao Dou1, Zhendong Sun1, Depeng Shen1,2
1School of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
Materials (Basel, Switzerland)
|June 19, 2024
概括
这项研究开发了Fe-Cr-Mo-Mn钢的准确模型,包括流应力和动态再结晶 (DRX),以优化热加工以获得所需的微观结构和特性.
科学领域:
- 材料科学与工程 材料科学与工程
- 金工业是金工业的一个方面.
- 物理金学 物理金学
背景情况:
- 了解Fe-Cr-Mo-Mn钢的热力学行为对于优化其热工作流程至关重要.
- 准确的构成模型和处理图对于预测微观结构演变和防止热变形过程中的缺陷至关重要.
研究的目的:
- 建立和验证Fe-Cr-Mo-Mn钢的流应力,动态再结晶 (DRX) 和粒径预测模型.
- 构建热处理图 (HPM),以确定最佳的处理参数和微观结构特征.
- 调查加工条件对流量应力的影响,DRX动力学,粒径,以及由此产生的微观结构.
主要方法:
- 对Fe-Cr-Mo-Mn钢进行了同热压缩测试,以收集模型开发的数据.
- 使用Laasraoui细分和Arrhenius模型来描述流应力行为.
- 建立了DRX动力学,粒径演变和热处理图,并通过颠覆测试进行实验验证.
主要成果:
- 流应力随着温度的降低和延展率的增加而增加,而粒度大小和DRX体积分数则减少.
- 确定了1050-1200°C和0.369-1s-1的最佳热加工范围,产生DRX颗粒和多阶段马氏体.
- 不稳定的加工区域导致了晶圆形的谷物边界,颗粒间裂和无序的马氏体结构.
结论:
- 开发的模型和HPM准确地预测了热加工过程中Fe-Cr-Mo-Mn钢的行为.
- 处理参数显著影响微观结构,最优的窗口促进了理想的DRX和马氏体结构.
- 该研究为通过优化热加工控制Fe-Cr-Mo-Mn钢的微观结构和性能提供了有价值的框架.
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