评估10CrMo9-10电力工程钢的退化状态,使用小冲击试验
Kamil Majchrowicz1, Barbara Romelczyk-Baishya1, Monika Wieczorek-Czarnocka1
1Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warsaw, Poland.
Materials (Basel, Switzerland)
|September 13, 2025
概括
小冲击测试 (SPT) 提供了一种可靠的方法来评估退化的电力工程钢的机械性能. 该技术通过将SPT结果与10CrMo9-10钢的抗拉强度相关联,准确估计剩余的使用寿命.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 结构完整性 结构完整性
背景情况:
- 电力工程钢结构随着时间的推移而退化,需要对机械性能进行监测,以预测剩余的使用寿命.
- 准确评估材料退化对于确保关键基础设施的安全性和可靠性至关重要.
研究的目的:
- 开发和验证使用小型冲击试验 (SPT) 确定10CrMo9-10钢在长期使用后机械性能变化的方法.
- 建立SPT结果与常规拉伸测试属性 (产量和最终拉伸强度) 之间的相关性.
主要方法:
- 模拟了10CrMo9-10钢在770°C的温度下通过化进行不同时间的降解.
- 根据EN 10371:2021使用单轴拉伸试验和小冲击试验 (SPT) 进行机械性质的表征.
- 开发一种公式,将SPT参数 (弹性-塑料过渡力,最大力) 与屈服强度 (Rp0.2) 和最终抗拉强度 (Rm) 相关联起来.
主要成果:
- 已确定的相关系数:βRp0.2 = 0.437 和 βRm = 0.255.
- 用于利用的10CrMo9-10钢的SPT估计:Rp0.2 = 236 ± 27 MPa和Rm = 459 ± 17 MPa.
- SPT结果与单轴拉伸试验值 (Rp0.2 = 218 ± 3 MPa,Rm = 454 ± 4 MPa) 非常相匹配.
结论:
- 小冲击测试 (SPT) 是一种可行且有前途的方法,用于在高温下长时间使用后评估结构钢的机械性质变化.
- SPT为评估材料降解和估计电力工程组件剩余使用寿命提供了更简单的替代方案.
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