| 李家瑶,褚靖,陶向前,蒋鹏,王松,程宇飞,段鹏.超超临界机组HR3C再热器受热面管组织、性能及持久寿命分析[J].有色金属材料与工程,2025,46(3):86-92. |
| 超超临界机组HR3C再热器受热面管组织、性能及持久寿命分析 |
| Analysis of microstructures, properties and creep rupture life of HR3C heating surface tube at the reheater of an ultra-supercritical unit |
| |
| DOI：10.13258/j.cnki.nmme.20240711001 |
| 中文关键词: HR3C 钢 显微组织 性能 持久寿命 |
| 英文关键词:HR3C steel microstructure properties creep rupture life |
| 基金项目:上海明华电力科技有限公司资助项目（33002599210919） |
|
| 摘要点击次数: 980 |
| 全文下载次数: 441 |
| 中文摘要: |
| HR3C是TP310型奥氏体耐热钢的优化钢种，因其良好的高温力学性能和抗氧化性能，被广泛应用于超临界机组和超超临界机组。以某电厂超超临界机组累积服役约60 000 h的末级再热器出口HR3C受热面管为研究对象，通过布氏硬度测试、拉伸测试、金相观察、扫描电子显微镜和透射电子显微镜观察，以及高温持久强度测试，对其显微组织、性能以及持久寿命进行分析。结果表明：相较于供货态，HR3C受热面管服役态的显微组织中析出相显著增多，其布氏硬度、抗拉强度和屈服强度均提高，在常温拉伸时其塑性明显降低，但在高温拉伸时仍保持较高水平；根据高温持久强度测试数据推算，该受热面管在650 ℃服役条件下的剩余寿命超过100 000 h。 |
| 英文摘要: |
| HR3C, an optimized variant of TP310 austenitic heat-resistant steel, is widely used in supercritical units and ultra-supercritical units because of its good high temperature mechanical properties and high temperature oxidation resistance. The HR3C heating surface tube at the outlet from the final reheater in an ultra-supercritical unit of a power plant with accumulated service of about 60 000 h has been taken as the research object. The microstructures and properties as well as creep rupture life were investigated by Brinell hardness tests, tensile tests, metallographic examination, scanning electron microscope and transmission electron microscope observations, and high temperature lasting strength test. The results show that, compared with the as-received state, the amount of precipitated phases in the microstructure of the HR3C heating surface tube after service increases significantly; the Brinell hardness, the tensile strength and the yield strength all increased, while the plasticity significantly decreases during tensile tests at room temperature, but remains relatively high during tensile tests at high temperatures. Based on the results of the high temperature lasting strength test, the remaining life of the heating surface tube under the service condition of 650 °C is calculated to be greater than 100 000 h. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
