Abstract
The mechanisms of interaction of various ultradisperse substances with molding materials, as well as their influence on physical and technological properties, are considered. Examples of using of ultrafine nano-sized additives in foundry are given. The possibilities of increasing level of technological properties (initial strength, gas permeability and non-stick properties) of mixtures due to additives of UPC, which contributes the improvement of the surface quality of castings and to the reduction laboriousness of finishing operations are described.
Highlights
The mechanisms of interaction of various ultradisperse substances with molding materials, as well as their influence on physical and technological properties, are considered
The possibilities of increasing level of technological properties of mixtures due to additives of UPC, which contributes the improvement of the surface quality of castings and to the reduction laboriousness of finishing operations are described
В результате модифицирования поверхностное натяжение раствора кальцийфосфатного связующего (КФС) уменьшается с 121 до 60 мН/м, прочность КФС возрастает с 40 до 61 МПа; строение кристаллов изменяется от сложных, пространственно-разветвленных форм до простых, пластинчатых кристаллов
Summary
The mechanisms of interaction of various ultradisperse substances with molding materials, as well as their influence on physical and technological properties, are considered. Однако данные о влиянии ультрадисперсных материалов на свойства полимеризующихся систем как органической, так и неорганической природы, в том числе связующих, используемых при изготовлении литейных форм, таких, как химический состав, размер частиц и способ получения материалов, носят ограниченный характер. Исследования закономерностей влияния ультрадисперсных порошков на физико-механические и тех нологические свойства связующих материалов представляют интерес как с теоретической, так и практической точки зрения.
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