Review of materials selection and welding with evaluation technology for use in high-temperature components of 700 ℃ A-USC unit

CHEN Biqiang; LIU Junfeng; YUAN Yong; HUANG Jinyang; DANG Yingying; LI Pei; YIN Hongfei; LIU Peng; LI Limin; YANG Zhen; ZHOU Yongli; ZHANG Peng; YAN Jingbo; HUANG Linhao; LIU Heng

doi:10.19666/j.rlfd.202402026

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Review of materials selection and welding with evaluation technology for use in high-temperature components of 700 ℃ A-USC unit

更新时间：2025-09-28

- Review of materials selection and welding with evaluation technology for use in high-temperature components of 700 ℃ A-USC unit
- Thermal Power Generation Vol. 53, Issue 7, Pages: 1-13(2024)
- 作者机构：
  
  西安热工研究院有限公司高效灵活煤电及碳捕集利用封存全国重点实验室
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202402026
  CLC： TM621
- Published：2024
- 稿件说明：
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CHEN Biqiang, LIU Junfeng, YUAN Yong, et al. Review of materials selection and welding with evaluation technology for use in high-temperature components of 700 ℃ A-USC unit[J]. Thermal power generation, 2024, 53(7): 1-13.
DOI：

CHEN Biqiang, LIU Junfeng, YUAN Yong, et al. Review of materials selection and welding with evaluation technology for use in high-temperature components of 700 ℃ A-USC unit[J]. Thermal power generation, 2024, 53(7): 1-13. DOI： 10.19666/j.rlfd.202402026.

摘要

为适应700℃等级先进超超临界燃煤发电（700℃A-USC）机组严苛的服役环境，助力高效低碳燃煤发电技术的发展，高温合金拟被用于制造电站锅炉和汽轮机的高温构件。结合本国火电发展特点，美国、欧洲、日本、中国、印度等国家及地区先后提出并实施了具有各国特色的700℃技术研究计划。高温合金由于元素种类多、焊接难度大、产生焊接缺陷的倾向大，因此焊接技术和接头综合性能评价技术对高温构件的厂内制造、现场加工与修复以及服役安全性与完整性的影响重大。当前国内外700℃技术实际应用进展缓慢，主要原因是制造、连接、检测等技术障碍未完全解决。综述了国内外700℃技术的研究计划，并分析其发展前景，讨论了锅炉侧和汽轮机侧高温构件的选材现状，总结了当前高温合金焊接技术的现状与优缺点，分析了高温构件接头综合性能评价的关注重点，最后提出中国发展700℃技术的建议。

Abstract

In order to adapt to the harsh service environment of 700 ℃ advanced ultra-supercritical coal-fired power generation unit(700 ℃ A-USC)

and facilitate the development of high efficiency

low consumption and low carbon coal-fired power generation technology

high temperature superalloy will be used to manufacture the high-temperature components in boiler and turbine. Many countries and regions such as the United States

Europe

China

Japan and India have put forward research plans of 700 ℃ A-USC technology with national characteristics

respectively. Due to the variety of elements

high welding difficulty

and high tendency to produce welding defects in high-temperature alloys

welding technology and weld joint comprehensive performance evaluation technology have a significant influence on the factory manufacturing

on-site processing and repair

as well as service safety and integrity of high-temperature components. The current progress in practical application of the 700 ℃ technology at home and abroad is slow

which is mainly due to incomplete resolution of technical barriers such as manufacturing

connection

and testing. The research plans and development prospects of the 700 ℃A-USC technology around the world are summarized. The material selection of high temperature components including the boiler side and the turbine side is discussed. The current status

advantages and disadvantages of the welding technology for superalloy are summarized

and the critical focus points of the joint comprehensive properties evaluation technology for high temperature components are analyzed. Finally

some suggestions on developing the 700 ℃ A-USC technology are put forward.

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