660 MW 汽轮机主汽阀壳铸造工艺设计

摘要

分析了660 MW汽轮机主汽阀壳铸件结构特点、技术条件、铸件制造过程中可能存在的质量问题，详细介绍了660 MW汽轮机主汽阀壳的铸造工艺设计及质量控制要点。%The structure characteristics , the technical specification and the possible quality problem appeared dur-ing the production process of main stop valve casing casting for 660 MW steam turbine have been analyzed .Meanwhile , the casting process design and the quality control points of main stop valve casing for 660 MW steam turbine have been described in details .