Failure Analysis and Welding Repair for Reheater Tube Crack of 12Cr1MoV Steel

Xiang Feng Zheng; Nan Wu; Rong Gang Xue; Wen Bin Li; Guo Zhen Dong; Ji Feng Zhao; Er Song Chen; Peng Sun; Qiang Wang

doi:10.4028/www.scientific.net/AMM.401-403.619

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Electromagnetic Wave Absorbing Properties of Glass Fiber Reinforced Cement Composites with Special-Shaped Structure Surfaces
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Failure Analysis and Welding Repair for Reheater Tube Crack of 12Cr1MoV Steel
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Fluorescence Spectrophotometric Determination of Bisphenol A in Plastic Food Packing Materials
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 401-403Failure Analysis and Welding Repair for Reheater...

Failure Analysis and Welding Repair for Reheater Tube Crack of 12Cr1MoV Steel

Abstract:

Through methods, such as microscope analysis, chemical analysis, hardness analysis, metallography examination etc, the causes resulting in reheater tube cracking of 300MW station boiler have been analyzed. The result indicates this reheater tube cracking is reheat crack. The higher sensitive temperature in operating, excessive welding residual stress are the primarily inducement of cracking. In welding repair, the measures , such as replacing the material ,lower welding heat input, preheat treatment and so on, were taken. The welding repair succeeded greatly.