Study on Material Property Supervision Technology of P92 Steelfor Long-term Service in Ultra-supercritical Units

ZHANG Lu; ZHAO Yanfen; ZHU Baoyin; JIN Xiao; LAI Yunting; MA Qinzheng

doi:10.19805/j.cnki.jcspe.2026.240714

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Study on Material Property Supervision Technology of P92 Steelfor Long-term Service in Ultra-supercritical Units

更新时间：2026-10-10

- Study on Material Property Supervision Technology of P92 Steelfor Long-term Service in Ultra-supercritical Units
- Chinese Journal of Power Engineering Vol. 46, Issue 2, Pages: 21-27(2026)
- 作者机构：
  
  苏州热工研究院有限公司,江苏,苏州,215004
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2026.240714
  CLC：
- Online First：10 February 2026，
  
  Published：10 February 2026
- 稿件说明：
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张路,赵彦芬,朱保印,金晓,赖云亭,马芹征. 超超临界机组用P92钢长时服役材质监督技术研究动力工程学报, 2026, 46(2): 21-27 https://doi.

org/10.19805/j.cnki.jcspe.2026.240714
张路,赵彦芬,朱保印,金晓,赖云亭,马芹征. 超超临界机组用P92钢长时服役材质监督技术研究动力工程学报, 2026, 46(2): 21-27 https://doi. DOI： 10.19805/j.cnki.jcspe.2026.240714.

org/10.19805/j.cnki.jcspe.2026.240714 DOI：

摘要

P92钢由于具备优异的高温综合性能而大量应用于超超临界机组的高温部件(蒸汽管道、联箱等)中

但目前迫切需要开展材质退化机理及有效监督手段研究

以保障机组长时安全运行。对电站高温部件用P92钢的原始材质开展微观组织、力学性能检验评价;持续10 a跟踪了高温高压服役环境下材质特性、微观亚结构的变化特性

总结了组织、性能的变化规律并开展了服役退化机理研究;在此基础上

建立了92级钢在全寿期中材质的硬度、组织与老化级别的对应关系

提出了便捷无损的服役监督方法。结果表明:所提出的方法为核电站9Cr钢部件的监造、材质评价、运行监督等方面提供了参考依据。

Abstract

P92 steel had been widely used in high temperature components of ultra-supercritical units (such as steam piping and header) because of its excellent high-temperature comprehensive properties. However

there was still an urgent need to conduct research on the material degradation mechanisms and effective supervision methods to ensure the units' safe operation for long-term service. Microstructure analysis and mechanical property test of original P92 steel material for high temperature components of power plants were implemented. The evolution characteristics of material property and substructure had been traced for more than 10 years. The evolution law of microstructure and property was summarized and the degradation mechanism was studied. On this base

the relationship between material hardness

microstructure and degradation level was established for grade 92 steel during the whole lifetime

and a quick and nondestructive method for service supervision was proposed. Results show that the proposed method can provide a reference evidence for inspection

material evaluation and operational supervision of 9Cr steel in nuclear power plants.

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references

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