EVALUATION OF MATERIAL DEGRADATION FOR AUSTENITIC HEAT-RESISTING STEEL BY USING MAGNETIC METHOD

YUE Zeng-wu1; LIU Rui2; FENG Gang2; ZHAO Yong-ning2; TIAN Xue-lei11.Key Laboratory of Liquid Structure and Heredity of Materials under Educational Ministry

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EVALUATION OF MATERIAL DEGRADATION FOR AUSTENITIC HEAT-RESISTING STEEL BY USING MAGNETIC METHOD

更新时间：2025-09-28

- EVALUATION OF MATERIAL DEGRADATION FOR AUSTENITIC HEAT-RESISTING STEEL BY USING MAGNETIC METHOD
- Thermal Power Generation Vol. 38, Issue 12, Pages: 33-35(2009)
- 作者机构：
  
  1. 山东大学材料液态结构及其遗传性教育部重点实验室
  2. 山东电力研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TG142.73
- Published：2009
- 稿件说明：
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YUE Zeng-wu1, LIU Rui2, FENG Gang2, et al. EVALUATION OF MATERIAL DEGRADATION FOR AUSTENITIC HEAT-RESISTING STEEL BY USING MAGNETIC METHOD[J]. Thermal power generation, 2009, 38(12): 33-35.
DOI：

YUE Zeng-wu1, LIU Rui2, FENG Gang2, et al. EVALUATION OF MATERIAL DEGRADATION FOR AUSTENITIC HEAT-RESISTING STEEL BY USING MAGNETIC METHOD[J]. Thermal power generation, 2009, 38(12): 33-35. DOI：

摘要

奥氏体耐热钢在高温和高应力条件下长期服役后

会发生材质老化和蠕变损伤

在这一过程中由于奥氏体钢中相结构的变化而使其磁性能发生了显著变化。此外

高温服役后随着合金碳化物和σ相的析出

在析出相周围产生贫Cr区

使这些区域合金成分发生显著变化致使马氏体起始形成温度(Ms)上升

在冷却至室温后转变为马氏体

会引起耐热钢磁性能的显著变化。对此

通过测量合金中马氏体相的成分

利用磁性测量方法可评估奥氏体耐热钢长期高温服役后的老化程度。

Abstract

The austenitic heat-resisting steel will be aged and damaged by creep after long-term service under high temperature and high stress.This process is accompanied with remarkable change of magnetic property due to phase transformation in said steel.In addition

the precipitation of metallic carbides and σ phase after service under high temperature makes Cr depletion areas appeared around the precipitated phase

resulting in remarkable change of the composition in alloy

and makes Ms (initial temperature for formation of Martensite steel) to rise

and the Martensite transformation occurred after cooling to room temperature

leading to remarkable change of magnetic property in heat-resisting steel.For this

through measuring the Martensite phase composition in alloy

the evaluation of aged degree for austenitic heat-resisting steel after long-term service under high temperature can be carried out by adopting the magnetic property measuring method.

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