The zonal porosity in centrifugal casting of high aluminum ZA alloy is described and its formation mechanism is analyzed.

Based on the analysis of formation mechanism of shrinkage, dispersed shrinkage, gas cavity and blow hole shrinkage in the brake hub castings of Santana car, some methods are put forward to solve these problems.

This paper analyzed the structure characteristic of hub transfer and improved its casting technique with Proportional Solidification Technology,made use of densener,thin-small and tangential ingate to achieve graphitizing expansion self-supply of the cast,effectively prevented the defects of shrinkage cavity and dispersed shrinkage.

The different causes of dispersed shrinkage, for example:the trace element of iron melt, cast-iron heredity and process design, were analyzed during the casting process of diesel engine multi-cylinder head.

Effects of 45° Chamfer Angle and Fillet on Shrinkage Porosity (hole) in Investment Castings;

Study on shrinkage porosity criterion under pressure conditions;

Modeling of Shrinkage Porosity (Hole) in Ti Alloy Castings in Vertical Centrifugal Field;

New technology of cavity and porosity predication for aluminum alloy casting;

It was studied that the effect of carbon equivalent, inoculation and casting modulus on porosity of spheroidal graphite iron using a series of castings.

In this paper, an overview on porosity forming mechanism of spheroidal graphite iron is proposed based on its solidification characteristics, solidification process and the metallurgical factors.

Solving the Defects of Shrinkage Cavity and Porosity by Proportional Solidification Theory on Gas Turbine Shell Castings;

Solution to the Shrinkage Defects in Machine Tool Bed Castings Using Proportional Solidification Theory;

The influences of CE content, Si/C ratio, inoculant sorts and inoculant addition amount, addition amount of Cr-Fe, as well as some trace elements on shrinkage-caused leakage was summarized.