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1000MW超超临界垂直管圈锅炉水冷壁管横向裂纹实验研究

Xuedong LIANG,Haitao CAO,Rui REN, Genzhou ZHANG,Bin LI,Biao SHI,Huajian WANG,Yang WANG,Hongguang ZHOU

Foundry Technology（2017）

Cited 1|Views13
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Abstract
针对某1 000 MW超超临界垂直管圈锅炉水冷壁管横向裂纹形成的原因,开展了宏观检查、几何尺寸测量、化学成分分析、拉伸性能试验、金相分析、硬度试验、断口扫描电镜分析和外壁及断口附着物X射线能谱分析等实验研究.结果表明:冷壁管外壁横向裂纹为是腐蚀性热疲劳裂纹,是炉管传热过程中金属壁温的频繁波动产生的疲劳应力所致,炉内的还原性腐蚀烟气成分加速裂纹的发展.
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