Taking several ductile iron castings having shrinkage depression defects as examples,the formation reason of shrinkage depression and the factors causing shrinkage depression were discussed,and the prevention measures was proposed.

The causes of back end defects of copper alloy extruded products were analyzed, provide preventive measures, the product quality had been improved effectively, thus achieving good economic benefit.

Solidification Simulation and Shrinkage Defect Prediction of S.G. Iron Casting in Sand Lined Metal Mold;

Adopting optimizing design of risers, sound turbochargers were prepare d, and solidification process and shrinkage defects of turbocharger castings wer e analyzed.

Influence of the initial temperature fields and mold hardness on the shrinkage defect of ductile iron casting by EPC process was mainly investigated in this paper.

After analyzing glaze shrinkage freckle on cap and pin insulator body observed in manufacturing process,the author attributes it firstly to deviation of body moisture from technological specification,and secondly to low temperature at glazing and thick ink for marking.