外冷铁，冷铁的一大类，指造型（芯）时放在模样（芯盒）表面上的金属块。
球铁前轮毂和差速器原采用手工造型，用外冷铁解决缩孔缺陷。
Manual molding had been used for the nodular iron front wheel boss and differential mechanism case, and chills were used to prevent shrinkage defects.
本文以生产实践为依据，介绍了大块间接外冷铁在轧机牌坊上的应用及工艺措施。
In this paper, according to production practice, the application of bulk indirect external iron chill and the technological measure in mill housings are introduced.
通过对铸钢件外冷铁标准的制定和应用情况的介绍，提出了节约成本、简化工艺、提高质量的一条重要途径。
Through the introduction of formulating standard and the use of external iron chill in cast steel, the paper pointed out a way for saving cost, simplifying working processes and improving quality.
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