Nuclear power station control rod drive mechanism's detachable joint and its preparation method

• Main Authors: YANG CHUNLE, DAI CHANGNIAN, CHEN ZHIQIANG, RAN XIAOBING, MI DAWEI, DENG XIAOYUN, YANG MENGJIA, WU HAO, LIU BAOTING, TANG MAO
• Format: Patent
• Language: Chinese; English
• Published: 28.05.2014
• Subjects: ALLOYS; CHEMISTRY; COMBINED OPERATIONS; FERROUS OR NON-FERROUS ALLOYS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR REACTORS; OTHER WORKING OF METAL; PERFORMING OPERATIONS; PHYSICS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; UNIVERSAL MACHINE TOOLS

The invention discloses a preparation method of a nuclear power station control rod drive mechanism's detachable joint, comprising the following steps: 1) selecting raw materials and carrying out vacuum melting to obtain molten steel; 2) pouring an electrode by the use of the molten steel; 3) carrying out electroslag remelting of the electrode to obtain an electroslag remelting ingot, wherein the electroslag remelting ingot contains, by weight, 0.080-0.140% of C, Si being less than or equal to 0.50%, Mn being less than or equal to 0.80%, S being less than or equal to 0.020%, P being less than or equal to 0.030%, 0.50-1.00% of Ni, 11.50-13.00% of Cr, Co being less than or equal to 0.10%, Al being less than or equal to 0.050%, Mo being less than or equal to 0.60% and the balance Fe; 4) carrying out annealing treatment on the electroslag remelting ingot and then carrying out forging-cogging; and 5) carrying out annealing treatment on billets, carrying out hot rolling on round steel, carrying out quenching and te