From the chemical composition, trace element, inoculation and thermal exchange of metal mold casting, the principle of chill formation and the effective methods for preventing chill were studied.
文章从铸铁的化学成分、微量元素、孕育处理及金属型的热交换方面叙述了产生白口的原理及防白口的有效方法。
The casting technique with top gating system, outer shaped iron chill, compound casting mold and core assembly molding was used for producing aluminum impeller on a large scale successfully.
详细介绍了采取顶注式浇注系统、成形外冷铁、复合铸型、组芯造型的铸造工艺，成功地生产出批量铝叶轮。
The basic principle of the proportional solidification theory was introduced, and the influences of casting construction, feeder position and chill on feeding effect was described.
介绍均衡凝固的基本原理，叙述铸件结构、冒口位置和冷铁对补缩的影响。
The hardness and depth of chill layer on the roller outer surface can be raised with adding trace Bi into liquid Fe in centrifugal casting.
离心铸造时在铁水中加入微量的铋，可以提高滚筒外壳冷硬层的硬度和深度。
Using thin, wide ingate and chill can prevent the shrinkage defect, and improve casting yield by 3%.
采用薄、宽的内浇道和冷铁工艺消除了飞轮铸件的缩孔缺陷，铸造工艺出品率提高3%；
Carbofrax used as the chill material for casting may make casting obtain compact and wear-resistant structure.
碳化硅作为铸铁件激冷材料，可以使铸件获得致密而耐磨的组织。
The producing process of a kind of micro-chill suitable for suspension casting of heavy section ductile iron is briefly described.
简要介绍了一种适合于大断面球铁悬浮铸造用微型冷铁的制备工艺；
Therefore, the main process parameters of casting have been optimized using orthogonal design, thus obtaining high-quality castings without chill layer.
本研究通过正交试验对基本工艺参数进行优化组合，得到无白口的优质铸件。
Therefore, the main process parameters of casting have been optimized using orthogonal design, thus obtaining high-quality castings without chill layer.
本研究通过正交试验对基本工艺参数进行优化组合，得到无白口的优质铸件。
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