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根据有限元模拟软件ANSYS原理,对AP1000核电主管道锻件进行淬火过程数值模拟,以获得主管道淬火不同时刻温度场分布及应力场的情况。结果表明,当淬火结束时(t=600 s),锻件表面已冷却至室温,而管接口心部仍然保持较高温度;淬火开始阶段,锻件中最大的热应力点,会相应急速上升至最大值;随着淬火结束,锻件中热应力会逐渐变小;淬火阶段,主管道大部分区域的畸变都很小,最大的畸变区域主要集中在管接口与主管道接口之间。
According to the finite element simulation software ANSYS, the numerical simulation of the quenching process of the main pipe forgings of AP1000 nuclear power plant was carried out to obtain the distribution of temperature field and the stress field at different time of main pipe quenching. The results show that when the quenching is finished (t = 600 s), the surface of the forging has been cooled to room temperature, while the core of the pipe interface still maintains a higher temperature. In the initial stage of quenching, the maximum thermal stress point in the forging will rapidly increase to the maximum Value; With the end of quenching, forging thermal stress will gradually become smaller; quenching stage, the main pipe in most parts of the distortion is small, the largest distortion of the region mainly concentrated in the pipe interface and main pipe interface.