Failure Analysis and Welding Repair for Water Wall Tube Burst of 600MW Station Boiler

Xiang Feng Zheng; Er Song Chen; Qing Wang; Ji Feng Zhao; Guo Zhen Dong; Wen Bin Li; Nan Wu; Yan Ting Feng; Qiang Wang

doi:10.4028/www.scientific.net/AMR.706-708.1339

Paper Titles

Dynamics Simulation Study of the Axial Piston Pump
p.1323

Electric Connecting Piece Cutting Blanking Punching Compound Die Design
p.1327

EMD Analysis of Power Harmonics
p.1331

Experiment Research of Two-Span Rotor-Bearing System with Rub-Impact and Crack Faults
p.1335

Failure Analysis and Welding Repair for Water Wall Tube Burst of 600MW Station Boiler
p.1339

Finite Element Analysis for Pendulum Rod Support Based on ANSYS
p.1344

Finite Element Analysis of Bioprosthetic Heart Valve on Suture Densities
p.1348

Finite Element Analysis of Glass Lens Molding Process
p.1353

Finite Element Analysis of the Roll Collar's Temperature Field of Universal Rolling Mill
p.1357

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 706-708Failure Analysis and Welding Repair for Water Wall...

Failure Analysis and Welding Repair for Water Wall Tube Burst of 600MW Station Boiler

Abstract:

Through methods, such as microscope analysis, mechanical analysis, chemical analysis, metallography examination etc, the causes resulting in water wall tube bursting of 600MW station boiler have been analyzed. The result indicates this water wall tube burst is the high temperature creep fracture. The higher operating temperature, microstructure aging and high temperature strength degradation are the primarily inducement of bursting failure. In welding tube, the measures of reducing residual stress, such as lower welding heat input, reducing thickness of welding layer, assigning reasonably heat treatment power, lengthening holding time and so on, were taken. The welding repair succeeded greatly.