QIN Chengpeng1, WANG Liang1, LI Liang1, et al. TUBE BURST OF FINAL REHEATER ON BOILER OF A 1 000 MW ULTRA SUPERCRITICAL UNIT:CAUSE ANALYSIS[J]. Thermal power generation, 2012, 41(10): 69-72.
QIN Chengpeng1, WANG Liang1, LI Liang1, et al. TUBE BURST OF FINAL REHEATER ON BOILER OF A 1 000 MW ULTRA SUPERCRITICAL UNIT:CAUSE ANALYSIS[J]. Thermal power generation, 2012, 41(10): 69-72.DOI:
Series of tests such as macroscopic morphology observation
metallographic analysis
tensile test at room temperature
flattening test
hardness test and intergranular corrosion test etc.were conducted for the burst HR3C tube.Besides
the scanning electron microscopy(SEM) with energy dispersive spectroscopy(EDS) was used to determine the corrosion product.Results show that
no solution treatment is done on the HR3C tube after its cold bending
so when it starts working
the intergranular stress corrosion cracking can easily occur in corrosive environment due to the bending residual stress and internal pressure stress.Therefore