TP347H FG耐热钢超超临界机组服役50 000 h后组织与力学性能研究

傅硕; 鲁金涛; 黄锦阳; 徐雅欣; 党莹樱; 李文亚

doi:10.19805/j.cnki.jcspe.2025.240040

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TP347H FG耐热钢超超临界机组服役50 000 h后组织与力学性能研究

基础研究 | 更新时间：2026-01-27

- TP347H FG耐热钢超超临界机组服役50 000 h后组织与力学性能研究
- Study on Microstructure and Mechanical Properties of Heat Resistant Steel TP347H FG in Ultra-supercritical Unit After 50 000 Hours of Service
- 动力工程学报 2025年45卷第4期页码：489-495
- 作者机构：
  
  1. 西安热工研究院有限公司高效灵活煤电及碳捕集利用封存全国重点实验室,陕西,西安,710032
  2. 西北工业大学材料学院,陕西,西安,710072
- 作者简介：
  
  [ "傅硕(1999—),男,山东淄博人,硕士研究生,主要从事激光熔覆耐磨涂层等方面的研究" ]
  [ "徐雅欣(通信作者),女,副教授,博士,E-mail:xu.yaxin@nwpu.edu.cn" ]
- 基金信息：
  
  国家自然科学基金资助项目(52271070);中国华能集团有限公司重点科技项目(HNKJ23-H56)
- DOI：10.19805/j.cnki.jcspe.2025.240040
  中图分类号： TM621;TG142.73
- 网络出版：2025-04-28，
  
  纸质出版：2025
- 稿件说明：
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傅硕,鲁金涛,黄锦阳,徐雅欣,党莹樱,李文亚. TP347H FG耐热钢超超临界机组服役50 000 h后组织与力学性能研究动力工程学报, 2025, 45(4): 489-495 https://doi.

org/10.19805/j.cnki.jcspe.2025.240040
傅硕,鲁金涛,黄锦阳,徐雅欣,党莹樱,李文亚. TP347H FG耐热钢超超临界机组服役50 000 h后组织与力学性能研究动力工程学报, 2025, 45(4): 489-495 https://doi. DOI： 10.19805/j.cnki.jcspe.2025.240040.

org/10.19805/j.cnki.jcspe.2025.240040 DOI：

摘要

为研究TP347H FG管材高温服役安全性

对某600 ℃超超临界火电机组工况环境热暴露50 000 h的TP347H FG管材微观组织、腐蚀产物及力学性能进行了研究。采用金相显微镜、X射线衍射、扫描电子显微镜及能谱分析等测试手段

对服役后工件的管壁内外侧晶粒度、腐蚀机制、拉伸性能进行了综合分析。结果表明:相较于未服役工件

服役后工件表层出现晶粒细化层厚度降低现象;向火侧与背火侧氧化层均呈现双层结构

在高温烟气环境下有效增强了材料耐蚀性能;向火侧与背火侧由于晶内细小析出相的析出

其屈服极限相较于未服役管材有所提高

但析出相弱化了晶界的作用

致使工件延伸率大幅降低

并出现局部脆性断裂的特征。

Abstract

To investigate the high-temperature service safety of TP347H FG pipe material

a study was conducted on the microstructure

corrosion products

and mechanical properties of TP347H FG pipe material exposed to a thermal environment of a 600 ℃ ultra-supercritical thermal power unit for 50 000 hours. A comprehensive analysis was conducted on the grain size of the inner and outer walls of the workpiece

the corrosion mechanism

and the tensile properties after service

using metallographic microscopy

X-ray diffraction

scanning electron microscopy

and energy-dispersive spectroscopy analysis. Results show that the surface of the service-exposed workpiece shows a reduction in the thickness of the grain refinement layer

compared to the as-received workpiece. Both the fire-facing side and the non-fire-facing side oxidation layers exhibit a double-layer structure

which effectively enhances the corrosion resistance of the material in high-temperature flue gas environment. Due to the precipitation of fine intragranular phases of both the fire-facing side and the non-fire-facing side

the yield limit is improved compared to the as-received pipe material. However

the precipitation phases weaken the role of the grain boundaries

resulting in a significant reduction in the elongation of the workpiece and the emergence of local brittle fracture.

关键词

Keywords

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