大型球铁件的铸造工艺设计

摘要

The main casting method design principles of heavy ductile iron castings were introduced: putting the faces to be machined downwards; adopting single parting line as possible; adopting bottom gating system; pouring simultaneously from two ends for castings with large length, and using stop plug type pouring basin for the heavy and important castings; setting open risers on the top of castings; full utilizing graphitization expansion to compensate contraction. Some practical examples were showed to explain the principles and characteristics of various casting methods suitable to heavy ductile iron castings, as well as their gating system design, riser design and chill usage.%介绍大型球铁件铸造工艺设计的主要原则为:加工面向下；尽量采用一个分型面；采用底注；长度大的铸件采用两端同时浇注,重大件采用拔塞浇包浇注；铸件顶部设置明冒口；充分利用石墨化膨胀补缩.用具体实例说明适合于大型球铁铸件的各种铸造工艺原理和特点,以及浇注系统设计、冒口设计和冷铁使用的要点.