In order to realize the non-perforation and non-weld in the lower part of CAP1000 nuclear reactor pressure vessel core barrel and eliminate the possibility of loss of coolant accident caused by equipment leakage,an integrative bottom head forging with transition section and lower head combination was developed. The forging and heat treatment process of CAP1000 nuclear reactor pressure vessel integrative bottom head forging was verified and optimized by numerical simulation and laboratory physical simulation. Integrative bottom head forging for CAP1000 nuclear reactor pressure vessel was completed by prefabricated slab combined with twice stamping forging technology. Through normalizing-quenching-tempering performance heat treatment and optimization of quenching process equipment,the ultra-deep spherical integrative bottom head forging performance-controlled heat treatment is realized. The test results show that the forging size and various indicators meet the requirements of procurement specifications.
维普
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