Proven Metallurgical Techniques for Eliminating Slag Inclusion Defects from Ductile Iron Casting
Producing high-quality ductile iron castings is a priority for every foundry. However, one of the most common and troublesome defects that affects ductile iron is slag inclusion. These defects not only compromise the surface finish but also weaken the mechanical properties of the casting. To achieve defect-free results, foundries must adopt proven metallurgical techniques that effectively minimize or eliminate slag inclusions. In this article, we’ll discuss the causes of slag inclusion, its impact on casting quality, and the best metallurgical practices to prevent it. What Are Slag Inclusions in Ductile Iron? Slag inclusions are non-metallic impurities that get trapped inside the molten metal during casting. They usually consist of oxides, silicates, or other residues formed during melting. When these inclusions solidify with the metal, they appear as defects within the casting, leading to reduced strength, poor machinability, and possible rejection of the final product. This is where ...