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Methods of Shrinkage Defects Elimination in the Bottom Necks of Cast Iron Rolls

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Author(s): E. V. Menyailo

Journal: Metallurgical and Mining Industry
ISSN 2076-0507

Volume: 2;
Issue: 6;
Start page: 397;
Date: 2010;
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Keywords: SHRINKAGE DEFECTS | CAST IRON ROLLS | SAND MOLD | MOLDING | CASTING | CAST

ABSTRACT
The sand mold of the bottom neck often does not provide directional solidification of cast due to accelerated solidification of the roll body when casting rolls in stationary molds. To avoid hot zones and shrinkage defects in the bottom roll necks it is reasonable to make the bottom neck in metal mold with sandy-argillaceous heat-insulation. Bottom neck molding with external chill also helps solve this problem
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