Research on Welding Repair for Tee Joint Crack of Subcritical Power Station Boiler Platen Superheater Header

Qing Wang; Xiang Feng Zheng; Yan Ting Feng; Xiao Guang Niu; Xiao Jun Hao; Wen Bin Li; Ji Feng Zhao; Guo Zhen Dong

doi:10.4028/www.scientific.net/AMR.628.173

Paper Titles

Effect of Applying Air Pressure on Gas Porosity in Lost Foam Casting of Al-Si Alloy
p.150

Study on the Data-Bases for Fire Engineering Design of Structural Steels Members
p.156

Perpendicular Axis Magnetorheological Finishing of Spherical Optics
p.161

The New Effective Methodology for Prediction and Optimization of Distortion of Large Welded Structures
p.166

Research on Welding Repair for Tee Joint Crack of Subcritical Power Station Boiler Platen Superheater Header
p.173

Thermal Behavior of Cast Steel Industrially Produced
p.179

Advancement of Laser Micro-Welding
p.183

Effect of Doped Cobalt on Performance of Tungsten Filament
p.187

Hybrid Welding of AA5754-H111 Alloy Using a Fiber Laser
p.193

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 628Research on Welding Repair for Tee Joint Crack of...

Research on Welding Repair for Tee Joint Crack of Subcritical Power Station Boiler Platen Superheater Header

Abstract:

Through methods, such as microscope analysis, metallography examination, the causes resulting in tee joint crack of subcritical power station boiler platen superheater header have been analyzed. The result indicates the tee joint crack originated in the original defects, expanded to connect with reheat cracking and leaked finally. In repair crack, the measures of reducing residual stress, such as lower welding heat input, reducing thickness of welding layer, hammer blowing, assigning reasonably heat treatment power ,lengthening holding time and so on, were taken. The welding repair succeeded greatly.