Material selection for water wall of ultra supercritical unit boilers with steam temperature of 700 ℃

WANG Chongbin; XU Xueyuan; CHU Yufeng; JIN Yongqiang; TONG Hui; WANG Yu; LU Xiaoli

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Material selection for water wall of ultra supercritical unit boilers with steam temperature of 700 ℃

更新时间：2025-09-28

- Material selection for water wall of ultra supercritical unit boilers with steam temperature of 700 ℃
- Thermal Power Generation Vol. 44, Issue 7, Pages: 66-71(2015)
- 作者机构：
  
  上海锅炉厂有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621
- Published：2015
- 稿件说明：
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WANG Chongbin, XU Xueyuan, CHU Yufeng, et al. Material selection for water wall of ultra supercritical unit boilers with steam temperature of 700 ℃[J]. Thermal power generation, 2015, 44(7): 66-71.
DOI：

WANG Chongbin, XU Xueyuan, CHU Yufeng, et al. Material selection for water wall of ultra supercritical unit boilers with steam temperature of 700 ℃[J]. Thermal power generation, 2015, 44(7): 66-71. DOI：

摘要

针对超超临界600 MW机组主蒸汽温度为700℃的锅炉(700℃锅炉)水冷壁选材问题

分析比较了T12

12Cr1MoVG

T23

T24

T91

T92

T122(HCM12A)

VM12SHC和617mod等备选管材的适用性

包括母材和焊接接头的持久强度、热疲劳和蠕变疲劳

母材和焊接接头的抗蒸汽腐蚀和抗烟气腐蚀性能

热成型性能及可焊性。同时

提出超超临界700℃锅炉水冷壁应选用T92高强度马氏体钢管和617mod镍基合金管

应采用电加热板对T92水冷壁管对接焊接接头进行焊后热处理。

Abstract

The properties and serviceability of candidate water wall materials for 600 MW ultra supercritical(USC)unit boilers with main steam temperature of 700 ℃ were investigated

such as T12

12Cr1 MoVG

T23

T24

T91

T92

T122(HCM12A)

VM12 SHC and 617 mod.According to analysis on these materials' performances

including the rupture strength

thermal fatigue

creep fatigue

steam-corrosion resistance

gas-corrosion resistance

thermal mechanical properties and weldabilities

it suggests the high-strength martensite steel T92 and nickel alloy 617 mod should be selected as the water wall material for 700 ℃ USC boilers.During installation

post weld heat treatment should be carried out for the T92 welded joints using electric heating panel.

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