Archives

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Porosity casting defects and prevention methods

Porosity casting defect refers to the defect caused by the bubbles left in the casting before the liquid metal solidifies completely in the mold. There are three main sources of gases in castings: metal melting process, mold and pouring process. The source of gas in the melting process is...

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Prediction of porosity and shrinkage defects in sand casting

Shrinkage and porosity defects are common defects in sand casting production. The main purpose of numerical simulation of temperature field in solidification process is to predict the possible shrinkage and porosity defects in sand casting, so as to control the internal quality of sand casting and optimize the sand...

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Causes of shrinkage cavity and porosity casting defects

There are many reasons for shrinkage and porosity casting defects in castings. Deficiencies in product structure, smelting process, core sand, process design and other aspects may lead to shrinkage and porosity casting defects. ① Product structure: the casting wall is thick and uneven, and the heat feeding is insufficient;...

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Prediction of shrinkage porosity defects in sand castings

The prediction of shrinkage defects in sand castings during solidification is mainly realized by using shrinkage defect criterion. Shrinkage porosity defects are generally related to the speed of solidification process, the size of section and alloy composition. When the shrinkage rate of each element is divided by the critical...

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