针对生产大型球铁壳体的诸多难点,分别从造型制芯工艺,浇冒口设计,冷铁设计,合箱尺寸控制以及熔炼等方面指出控制要点,成功生产了大型球铁壳体铸件,铸件品质达到了用户的验收标准。 Aiming at many difficulties in producing large ductile iron shell, the key points of control were pointed out from modeling core making process, pouring riser design, chill iron design, co-box size control and smelting etc. The successful production of large ductile iron castings, castings Quality has reached the user acceptance criteria.