电焊机2025，Vol.55Issue(6)：88-94,111,8.DOI:10.7512/j.issn.1001-2303.2025.06.12
超超临界机组用G115钢埋弧焊材的研制
Development of Submerged Arc Welding Materials for G115 Steel Used in Ultra-Supercritical Units
缪兴平 1楚成刚 1范阳阳 2龙柄宏 1王学3
作者信息
- 1. 四川西冶新材料股份有限公司,四川 成都 611730||四川省特种焊接材料研究开发工程实验室,四川 成都 611730
- 2. 四川省特种焊接材料研究开发工程实验室,四川 成都 611730||哈工大郑州研究院,河南 郑州 450046
- 3. 武汉大学 动力与机械学院,湖北 武汉 430072
- 折叠
摘要
Abstract
To meet the demands for large-scale application of the new generation martensitic heat-resistant steel G115 in ultra-supercritical units,a systematic formulation design and performance evaluation were carried out for its supporting sub-merged arc welding materials.The flux was designed based on a CaF2-CaO-MgO-Al2O3-SiO2 ultra-low hydrogen high-alkalinity slag system(with a basicity BIIW=3.6),achieving an ultra-low hydrogen level of H4.Through the Barton rigid fixed cold crack test,it was verified that cold crack occurrence can be effectively prevented under a preheating temperature of 200℃.The welding wire adopts a Cr-W-Co-V-Nb-C-N composite strengthening route to ensure the comprehensive per-formance stability of the deposited metal under different welding parameters and heat treatment conditions.High-temperature creep tests showed that the strength of the deposited metal at 650℃for 100,000 hours is 86.5 MPa,meeting the design requirements of ultra-supercritical units.The XY-AF93 flux and XY-S93 welding wire formulations developed in this study balance strength and toughness with weldability,and are key to achieving excellent crack resistance and high-temperature sustained strength of the weld.The research results provide a reliable welding material solution for the applica-tion of G115 steel in ultra-supercritical units.关键词
G115钢/埋弧焊材/超超临界/抗裂性/高温持久Key words
G115 steel/submerged arc welding materials/ultra-supercritical/crack resistance/high temperature endurance分类
矿业与冶金引用本文复制引用
缪兴平,楚成刚,范阳阳,龙柄宏,王学..超超临界机组用G115钢埋弧焊材的研制[J].电焊机,2025,55(6):88-94,111,8.
