Transactions of Materials and Heat Treatment

Title：Springback simulation and compensation of molded forming for steel AP1000 containment vessel head petals

Authors： Yang Zhongwei Yan Guizhen Wang Guobiao Yang Zhaodong Gao Wei

Unit： Shandong Nuclear Power Equipment Manufacturing Co. Ltd.

KeyWords： head petals molded forming spring-back FE simulation compensation

ClassificationCode：TG386

year,vol(issue):pagenumber：2015,40(8):30-33

Abstract：

For steel AP1000 containment vessel with large dimension, medium thickness, tempered and quenched high strength elliptical head petals, the spring-back processes of molded forming under the different temperatures were simulated by finite element analysis software PAM-STAMP 2G. The iterative spring-back values of the die profile were compensated and corrected by the algorithm of smoothing geometry compensation, and the deviation of the actually formed petals was verified by the simulated result. The result shows that the forming quality of the head petals can be significantly improved by warm forming, and its spring-back reaches the minimum value at 500 ℃. Therefore, molded forming is an effective method to obtain perfect petal forming accuracy by designing reasonable profile dimensions based on the compensation and correction of die profile.

Funds：

国家科技重大专项（2010ZX06001-019）；山东省自主创新成果转化重大专项（2011ZHZX1A0501）

杨中伟(1960-)，男，学士，高级工程师

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