CAUSES LEADING TO FAILURE OF BOILER TUBES MADE FROM 18-8 TYPE AUSTENITIC STEEL AFTER OPERATION UNDER HIGH TEMPERATURE

ZHANG Xiao-yu; OUYANG Jie; GUO Li-feng; WU Nan; YAN Guang-zong 1.Hebei Provincial Electric Power Reseach Institute

doi:10.19666/j.rlfd.2007.09.028

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CAUSES LEADING TO FAILURE OF BOILER TUBES MADE FROM 18-8 TYPE AUSTENITIC STEEL AFTER OPERATION UNDER HIGH TEMPERATURE

更新时间：2025-09-28

- CAUSES LEADING TO FAILURE OF BOILER TUBES MADE FROM 18-8 TYPE AUSTENITIC STEEL AFTER OPERATION UNDER HIGH TEMPERATURE
- Thermal Power Generation Issue 9, Pages: 92-94(2007)
- 作者机构：
  
  1. 河北省电力研究院
  2. 华能上安电厂
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2007.09.028
  CLC： TG115.21
- Published：2007
- 稿件说明：
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ZHANG Xiao-yu, OUYANG Jie, GUO Li-feng, et al. CAUSES LEADING TO FAILURE OF BOILER TUBES MADE FROM 18-8 TYPE AUSTENITIC STEEL AFTER OPERATION UNDER HIGH TEMPERATURE[J]. Thermal power generation, 2007, (9): 92-94.
DOI：

ZHANG Xiao-yu, OUYANG Jie, GUO Li-feng, et al. CAUSES LEADING TO FAILURE OF BOILER TUBES MADE FROM 18-8 TYPE AUSTENITIC STEEL AFTER OPERATION UNDER HIGH TEMPERATURE[J]. Thermal power generation, 2007, (9): 92-94. DOI： 10.19666/j.rlfd.2007.09.028.

摘要

通过对火电厂锅炉用18-8型奥氏体不锈钢受热面管长期高温运行过程中失效事故的研究和分析

认为晶界出现连续和封闭的碳化物析出相及针状σ相、氧化皮成长和剥落以及弯头在复杂应力状态下发生的相变等金相组织老化现象直接造成材料性能的劣化

是18- 8型奥氏体不锈钢高温运行中失效的重要原因

其结果可为18-8型奥氏体钢锅炉管运行监督提供一定的参考。

Abstract

Through study and analysis of failure accidents occurred on boiler tubes made from 18-8 type austenitic steel in course of long-term operation under high temperature

it is believed that the important causes resulting directly in failure of 18-8 type auste- nitic steel tube in operation under high temperature are as follows:continuous and blocked separating-out phase and needle like O phase of carbide appeared in the grain boundary;growth and peeling-off of the oxide layers;phase change of the elbow under com- plicated stress conditions;deterioration of material′s performance resulted directly from mettalographic structure ageing.The results of analysis provide with certain reference for operation supervision of said boiler tubes.

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