In hypereutectic nodular cast irons, primary precipitation of graphite may lead to graphite flotation in thick section castings . Graphite degeneracy such as so-called exploded graphite is then often associated with this flotation phenomenon and it appears as precipitates where the nodular form is replaced by star-like or flower-like shape. It has been reported that exploded graphite develops …
3/23/2010 · Exploded graphite in SG Iron casting Exploded graphite in SG Iron casting smurali1 (Automotive) (OP) 23 Mar 10 06:26. We have some SG Iron castings . We found exploded graphite formation in some of the castings after machining. (The confirmation was done by destructive study of one casting ) Are there any NDT method to find out how much depth is …
The use of ductile iron casting (DI) has been increasing constantly all over the world. In the … Charges consisting of 250kg SG iron returns, 200kg steel scraps, 50kg … Low nodule count and exploded graphite are found in the structure. Similarly Fig. 3.1, 3.2 and, Thin Wall Compacted Graphite Iron Castings . … high carbon levels create the risk of exploded graphite . Accordingly, for the following heats the target carbon content was … 40% SG iron returns …
Degenerated graphite layer deposited on the surface of the sphe-roidal graphite ( SG ) cast iron as a ?ake graphite seam. Incidence of the defect Depending on the casting wall thickness and rate of cooling, a 0.2 to 1 mm thick degenerated seam of ?ake graphite can occur on SG iron castings . This seam then blends smoothly into the struc-, Spheroidal Graphite Cast Iron Grades, Properties, Composition …
A Possible Mechanism for the Formation of Exploded …
SG Iron Casting Grades and Standards, Spheroidal Graphite Cast Iron Grades, Properties, Composition …
SG Iron Casting Grades and Standards : SG Iron is known as Spheroidal Graphite Iron , and also known as Ductile Cast Iron , Nodular Cast Iron , or Spherulitic Graphite Cast Iron . SG Iron is a type of cast iron that has been treated while molten with an element such as magnesium or cerium to induce the formation of free graphite as nodules or …
Spheroidal Graphite Cast Iron Grades, Properties, Composition, Microstructure, Density and Castings . Spheroidal graphite cast iron can be short as S.G . cast iron , and also can be called as ductile iron , or nodular graphite iron .Therefore, SG cast iron has completely same grades and all mechanical and chemical properties as ductile iron .
VI “ exploded ” graphite forms can occur in ductile iron . Type VII “flake” graphite occurs in gray iron and sometimes on the cast surfaces of ductile iron castings . Methods of Rating Nodularity The rating of nodule types and the determination of percent nodularity is almost always a requirement in the casting specification. The various …
SG Iron is also known as Ductile Cast Iron , Nodular Cast Iron , Spheroidal Graphite Iron and Spherulitic Cast Iron . This grade of Iron was developed over 60 years ago and in the USA. As the name Ductile Iron suggests this grade of Cast Iron has a degree of ductility. The main characteristic of this material is the structure of the graphite .
Ductile iron , also known as ductile cast iron , nodular cast iron , spheroidal graphite iron , spheroidal graphite cast iron and SG iron , is a type of graphite -rich cast iron discovered in 1943 by Keith Millis. While most varieties of cast iron are weak in tension and brittle, ductile iron has much more impact and fatigue resistance, due to its nodular graphite inclusions.
