Research on 50-ton Large FB2 Intermediate Pressure Rotor Forgings
To manufacture the first large FB2 intermediate pressure rotor product with the delivery weight exceeding 50 tons,the company analyzed the challenges associated with manufacturing processes,including the smelting of 100-ton electroslag remelting ingots,the forging of 80-ton billets,and the heat treatment of 60-ton rotor forging,in view of the manufacturing difficulties of smelting,forging and heat treatment processes,corresponding process control measures were taken.After completing the preparation of 100 t class electroslag ingot,forging and heat treatment processes,comprehensive ultrasonic,chemical composition,mechanical properties,metallographic structure and other tests were carried out on large FB2 intermediate pressure rotor forgings,and the results met the requirements.The research and development of 50 t class large FB2 intermediate pressure rotor forging are successfully completed.
FB29%~12%Crmartensitic heat-resistant steelhigh and intermediate pressure rotorultra-supercritical