An Analysis of Mechanisms on the Bad Collapsibility of the Shell of Calcined Alumina Used in Precision Casting[J]. Special Casting & Nonferrous Alloys, 1987,(5):3-7.
An Analysis of Mechanisms on the Bad Collapsibility of the Shell of Calcined Alumina Used in Precision Casting[J]. Special Casting & Nonferrous Alloys, 1987,(5):3-7.DOI：
精铸铝矾土型壳溃散性差的机理分析
摘要
<正> 国内自推广铝矾土熟料作精铸型壳材料以来
感到这种材料的脱壳性差
甚至有些厂认为问题相当严重;另外还有些厂感到铝矾土熟料易粉尘出
须经常对挂砂料过筛。对于这些现象应当如何解释?其规律如何?能否进一步改善?这是大家长期以来关心的
Abstract
The bad collapsibility of the shell of calcined alumina used in precies sion casting is studied by microanalysis method.Two mechanisms have been suggested based on the residual strength of shell and the dimensional changes of shell after pouring.Causes of these two kinds of sintering are studied and the opinions are proposed for the improvement of the shell materials used in precision casting at home.
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