AN APPROACH TO OVER-TEMPERING AFTER WELDING OF P91 STEEL

XIE Hang-yun1; ZHANG Li-xin2; ZHOU Ping11.Guodian Science & Technology Research Institute

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AN APPROACH TO OVER-TEMPERING AFTER WELDING OF P91 STEEL

Thermal Power Generation Vol. 39, Issue 3, Pages: 9-12(2010)

更新时间：2025-09-28

- AN APPROACH TO OVER-TEMPERING AFTER WELDING OF P91 STEEL
- 作者机构：
  
  1. 国电科学技术研究院
  2. 国电菏泽发电厂
- 作者简介：
- 基金信息：
- DOI：
  CLC： TG162
- Published：2010
- 稿件说明：
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XIE Hang-yun1, ZHANG Li-xin2, ZHOU Ping11.Guodian Science & Technology Research Institute. AN APPROACH TO OVER-TEMPERING AFTER WELDING OF P91 STEEL[J]. Thermal Power Generation, 2010, 39(3): 9-12.
DOI：

XIE Hang-yun1, ZHANG Li-xin2, ZHOU Ping11.Guodian Science & Technology Research Institute. AN APPROACH TO OVER-TEMPERING AFTER WELDING OF P91 STEEL[J]. Thermal Power Generation, 2010, 39(3): 9-12. DOI：

摘要

在焊后热处理过程中

过回火会导致新型耐热钢P91钢的组织劣化

硬度和抗化学腐蚀性能降低。分析认为

P91钢过回火的主要原因是指导性文件或标准欠缺

以及恒温时间和降温速度不合理。讨论了P91钢焊接和焊后热处理工艺的有关问题

提出了在确保焊接接头的韧度和蠕变断裂强度的前提下

合理选择恒温时间和升、降温速度

防止产生过回火现象。

Abstract

In the heat treatment process after welding

over-tempering can lead to worsening of the texture concerning the new type heat-resistant steel

namely P91 steel

making the hardness and chemical corrosion resistant behavior of P91 steel to be reduced.The causes resulting in over-tempering of P91 steel have been analysed

it is believed that the causes are short of guiding document or standard

unresonable constant-temperature time and temperature-reducing rate.The problems related to heat-treatment technology after welding of P91 steel have been discussed

it is put forward that the heat-treatment technology should take ensuring toughness and creep rupture strength of the weld joints as starting point

reasonably selecting the constant-temperature time as well as the temperature-rising rate and the temperature-reducing rate

preventing the voer-tempering phenomenon to be occurred.

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Publicity Resources

STUDY ON PERFORMANCE OF HIGH HARDNESS AND LOW HARDNESS WELD JOINTS ON P91 MAIN STEAM PIPE

QUANTITATIVE ASSESSMENT OF FAILURE RISK FOR HIGH TEMPERATURE HEADER MADE FROM P91 STEEL

Phased array ultrasonic testing of P91 pipe weld in confined space

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