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首页> 外文会议>International conference on advances in materials technology for fossil power plants >Long-Term Creep Rupture Strength of Weldment of Candidate Ni and Fe-Ni Based Materials for Tube and Pipe of A-USC Boilers
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Long-Term Creep Rupture Strength of Weldment of Candidate Ni and Fe-Ni Based Materials for Tube and Pipe of A-USC Boilers

机译：A-USC锅炉管和管道候选Ni和Fe-Ni材料焊接长期蠕变破裂强度

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Continuous and active works have been going to develop 700°C A-USC (Advanced Ultra Super Critical) power plants in Europe, United States and also Japanese national project has launched in 2008. In this new Japanese project Fe-Ni based alloy HR6W (45Ni-24Fe-23Cr-7W-Ti) is one of the candidate materials for boiler tube and pipe as well as Ni based alloys such as well-known Alloy617, Alloy263 and Alloy740. The most important issue in boiler fabrication is the welding process of these alloys and long-term reliability of their weldments. Authors investigated the weldability of HR6W thick-wall pipe. The integrity of the weldment was confirmed with metallurgical investigation, mechanical testing and long term creep rupture test. It is proved that the narrow gap HST welding procedure can meet the requirements for Ni based or Fe-Ni based alloys and provides excellent strength properties.
机译：欧洲，美国和日本国家项目的连续和积极的作品一直在开发700°C A-USC（高级超级关键）发电厂2008年推出。在这款新的日本项目Fe-Ni基金HR6W中（ 45Ni-24Fe-23cr-7w-Ti）是锅炉管和管道的候选材料之一以及诸如众所周知的合金617，合金263和合金740的Ni基合金之一。锅炉制造中最重要的问题是这些合金的焊接过程和其焊接的长期可靠性。作者研究了HR6W厚壁管的可焊性。用冶金调查，机械测试和长期蠕变破裂试验证实了焊接的完整性。证明窄间隙HST焊接程序可以满足基于Ni或Fe-Ni基合金的要求，并提供优异的强度特性。

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