26H2MF和St12T钢在高温下扭转时的机械特性
1Faculty of Technical Sciences, University of Warmia and Mazury, Oczapowskiego 11, 10-719 Olsztyn, Poland.
Materials (Basel, Switzerland)
|July 12, 2025
概括
这项研究研究了在热疲劳下耐热钢的材料耗力. 与26H2MF钢相比,St12T钢具有优越的高温耐受性,这对于动力轮机组件设计至关重要.
科学领域:
- 连续机械学的连续力学.
- 材料科学 是一种材料科学.
- 机械工程 机械工程
背景情况:
- "物质努力"的概念是复杂的,主要是使用单一测量 (例如,Huber-Mises-Hencky等效应力) 的简化观点.
- 由于可再生能源的整合,新兴能源部门面临"低循环热疲劳",需要先进的材料表征.
- 现有的模型可能无法充分描述不同操作条件下的材料行为,特别是在快速启动/关闭周期期间.
研究的目的:
- 在高温纯扭转下研究耐热钢 (St12T和26H2MF) 的材料特性和强度特性.
- 分析动力轮组件的扭力强度,并比较St12T和26H2MF钢的高温抵抗.
- 通过结合来自张力,压缩和扭力测试的数据来确定这些钢在高温下的屈服面,从而使得更准确的强度分析成为可能.
主要方法:
- 修改的测试机器用于纯扭力测试,以记录扭矩与扭矩角度的扭矩.
- 在各种高温下 (高达800°C) 实验性确定应力和扭力强度.
- 整合张力,压缩和扭力测试数据以使用Burzyński,Drucker-Prager和Willam-Warnke等标准来建模产率表面.
主要成果:
- 在高温下,St12T钢比26H2MF钢具有更高的耐受性.
- 在600°C时,St12T钢的屈服应力为319.3MPa,扭矩强度为394.4MPa.
- 在550°C,26H2MF钢的屈服应力为311.4MPa,扭矩强度为382.8MPa.
- 确定了不对称性和可塑性系数,使得产量表面可以作为温度的函数来建模.
结论:
- 与26H2MF钢相比,St12T钢更适合在动力轮机中的高温应用.
- 结合实验数据和建模,为受热疲劳影响的动力轮组件的设计和诊断提供了关键的见解.
- 除了简化模型之外,准确的材料表征对于预测性能和确保在能源部门要求苛刻的应用中安全至关重要.
相关概念视频
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