金属加工（热加工）Issue(3)：70-76,7.
核电压力容器钢SA508-Ⅲ焊接热影响区冲击韧度与补偿策略研究
Study on impact toughness and compensation strategy of welding heat affected zone of SA508-Ⅲ for nuclear power pressure vessel
郭城湘 1王朗 1朱海宇1
作者信息
- 1. 中核集团中国核电工程有限公司 北京 100840
- 折叠
摘要
Abstract
In this study,the welding heat-affected zone(HAZ),specifically the coarse-grained region of SA508-Ⅲ steel,was simulated using thermal cycle simulation techniques.Charpy impact tests were conducted at various temperatures to construct the ductile-to-brittle transition curve.The results indicate a significant reduction in impact toughness in the HAZ compared to the base material,supporting the rationality of ASME nuclear codes in requiring impact toughness compensation for HAZ regions.Furthermore,the influence of different welding processes-represented by varying thermal cycle curves-and the effects of post-weld heat treatment(PWHT)were systematically investigated.It was found that both welding parameters and thermal treatment have notable effects on HAZ impact performance.In particular,the impact toughness of the simulated HAZ was significantly improved after heat treatment,demonstrating the effectiveness of PWHT in restoring toughness degraded by welding thermal cycles.关键词
热模拟/SA508-Ⅲ钢/冲击韧度Key words
thermal simulation/SA508-Ⅲ steel/impact toughness引用本文复制引用
郭城湘,王朗,朱海宇..核电压力容器钢SA508-Ⅲ焊接热影响区冲击韧度与补偿策略研究[J].金属加工（热加工）,2026,(3):70-76,7.
