Research on the Aging Behavior of 316H Steel Sodium for Intermediate Heat Exchangers of Demonstration Fast Reactors in Sodium
316H steel is the main material for the intermediate heat exchangers of China's demonstration fast reac-tors.With the increase of operating time,its aging effect continues to accumulate.To explore the aging behavior of 316H steel under the operating conditions of the intermediate heat exchangers of demonstration fast reactors,this study conducted the compatibility test of 316H steel pipe and plate specimens for 1000-8000 h under the static so-dium conditions of 353℃and 535℃,and analyzed the microstructure characterization,corrosion rate measure-ment and mechanical property test of the samples after the test.The results showed that there was almost no corro-sion phenomenon on the samples under the condition of 353℃,and that under the condition of 535℃,high temperature accelerated diffusion,resulting in the significant aging behavior of the material,and the corrosion of the material in sodium shifted to a steady-state stage with the increase of test time.The research shows that the aging behavior of 316H steel in sodium is affected by factors such as the temperature of sodium,soak time and the manu-facturing process of the material,and that it has good anti-aging ability in the low-oxygen,low-carbon and low-temperature sodium environment and has the sign of aging in the relatively high-temperature and long-time so-dium environment.
316H steelSodium-cooled fast reactorIntermediate heat exchangerAgingCorrosion rate
NETL
NSTL
万方数据
维普
