基于水玻璃的模塑混合物组成的工艺添加剂的选择

IF 1.3 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

International Journal of Cast Metals Research Pub Date : 2021-11-02 DOI:10.1080/13640461.2021.2015889

N. A. Kidalov, A. S. Adamova, N. V. Grigoreva

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引用次数: 1

摘要

在铸造厂生产模具和芯材时，以水玻璃为基础的混合物被广泛使用。在硬化过程中，玻璃液发生凝固，使混合物具有高强度特性。基于水玻璃的模塑混合物的一个显著缺点是由于水玻璃与型砂的烧结能力增加而导致敲除率低。为了提高敲除效果，在混合模的组成中引入了弱添加剂。本文分析了有机弱添加剂在水玻璃基模混合物组成中的特点。结果表明，影响混合物淘汰的主要指标是析出气体的数量和形成碳的形成。随着热破坏系数的增大，水玻璃混合料的淘汰率随着形成碳量的增加而降低。

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Selection of technological additives to the composition of the moulding mixtures based on water glass

ABSTRACT In the foundry for the production of moulds and cores, mixtures based on water glass are widely used. During their hardening, the coagulation of liquid glass occurs, as a result of which the mixture obtains high strength characteristic. A significant drawback of moulding mixtures based on water glass is low knockout due to increased sintering ability of water glass with moulding sand. To improve knockout, weak additives are introduced into the composition of moulding mixtures. This paper analyses the characteristics of organic weak additives for the composition of moulding mixtures based on water glass. It is shown that the main indicators which affecting to the knockout of mixtures are the amount of evolved gases and the forming carbon formation. With an increase in coefficient of thermal destruction, the knockout of the mixtures based on water glass mixture is reduced by increasing the amount of formed carbon.

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来源期刊

International Journal of Cast Metals Research 工程技术-冶金工程

CiteScore

2.70

自引率

7.10%

发文量

审稿时长

7.5 months

期刊介绍： The International Journal of Cast Metals Research is devoted to the dissemination of peer reviewed information on the science and engineering of cast metals, solidification and casting processes. Assured production of high integrity castings requires an integrated approach that optimises casting, mould and gating design; mould materials and binders; alloy composition and microstructure; metal melting, modification and handling; dimensional control; and finishing and post-treatment of the casting. The Journal reports advances in both the fundamental science and materials and production engineering contributing to the successful manufacture of fit for purpose castings.