Comparison and investigation on the properties of low-alloy steel weld metal in the reactor pressure vessel of the third generation nuclear power reactor
By simulating the girth weld of the pressure vessel of the third generation pressurized water reactor in China,the domestic welding material and imported welding material were comparatively analyzed in terms of welding process performance,weld metal chemical composition,tensile strength,impact toughness,drop-weight and low-cycle fatigue tests.The results show that the welding process performance and mechanical properties of the weld metals of domestic and imported welding materials are equivalent.The average impact absorption energy at-28.3℃of the weld metal at different sampling positions of the test weldment is greater than 90 J,indicating a significant design margin.At present,the domestic welding materials have been applied in the pressure vessels of the third generation nuclear power plant in China,and are expected to be further applied in other plants in the future.
reactor pressure vesselSA-508 Gr.3 Cl.1 steeldomestic welding consumablesweld metal properties
国家科技期刊平台
NSTL
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