Abstract：The important development progresses of the nickel- based alloy thick plate used as the steam generator divider plate in the pressurized water reactor nuclear power plant produced were introduced in Baosteel Special Metal Co. Ltd. during the 12th Five- year Plan period. The technological progress of nickel- base alloy thick plate, such as the optimization of the alloying elements, the homogenization of the large- scale alloy ingot, the homogenization of the microstructures during the hot- working and heat treatment processes, are mainly introduced. All these progresses benefit the homogenization of alloying elements and microstructures of thick hot- rolled nickel- based alloy plate, and the capacity of the industrialized production of alloy 690 has been achieved by the establishment of the entire manufacturing process. Both the microstructure and mechanical properties of the plates coincide the design standards of the divider plate, indicating that the present products can substitute the imported products completely.
2018, Vol. 25 
