核电站钢制安全壳焊后热处理仿真技术研究

Simulation Technology for Post Weld Heat Treatment of Steel Containers for Nuclear Power Plants

利用SYSWELD软件模拟安全壳筒体第1大环和第2大环之间环焊缝的焊后热处理过程,分析局部整圈和局部分段热处理后安全壳的残余应力及变形情况;通过实测残余应力与数值模拟残余应力结果的对比,证明数值模拟结果的正确性和可靠性,同时结合工程实际情况,证明局部分段热处理方法的合理性,并确定了合理且经济的局部热处理分段方案。研究结果为大壁厚、大体积的钢制安全壳热处理提供了一种有效的途径。

The post weld heat treatment process of the weld between the first ring and the second ring in the containment was simulated by SYSWELD software, and then the residual stress and deformation of the whole circle and segment of the containment was calculated and analyzed. Afterwards, the effectiveness of the simulation was proved by comparison with experimental residual stress results, and the rationality of the partial segmentation heat treatment method was determined by combining with the actual situation of the project. Therefore, the research provided an effective way for post weld heat treatment of the nuclear steel containment with large wall thickness and large volume.