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Competitive Production – Crucial Information about Compacted Graphite Iron and Cast Iron

Sep 10th 2015 at 9:31 PM

Iron casting is a popular way of producing iron ornaments, valves, and engine blocks among many other items in the agricultural and automotive industries. This process also comes in handy in producing numerous pieces and bits for the military.

The temperatures heating up the raw materials rise up to an average of 2,850 degrees F or even more. This can have quite some warming effects within the surrounding environment. In the recent past, tremendous changes have hit the automotive and iron casting industries. For instance, higher oil prices created a high demand for lighter and smaller style of passenger vehicle. The new fuel economy standards resulted to the renovation of suspension castings as well as carrier and iron blocks to the aluminum in light trucks.

Why change is inevitable

Most Cast Iron Manufacturers Gray, and especially in the United States, have drastically substituted malleable iron in appliances, lighter alloys, composites, ceramics, plastics and aerospace equipment to assist them meet government regulations and compete in the global economy. In 1980, the cast iron usage per lightweight truck and passenger car was roughly 600 pounds. By 1999, this usage had significantly dropped to approximately 330 pounds. By 2005, all combined metal castings sales were estimated at $33.90 billion.

Understanding Compacted Graphite Iron and Cast Irons

Compacted Graphite Iron Vs Cast Iron

Because of the development of dependable methods of production of Compacted Graphite Iron (CGI), it easily became commercially available. Graphite occurs as the interconnected blunt flakes appear within each cell. The graphite structures together with the resulting iron’s resulting properties are intermediate between ductile and gray irons. The compacted graphite shape also goes by the names seminodular, aggregated flake, quasiflake, and vermicular graphite.

The production of CGI is almost the same to that of ductile iron. This is in the sense that both require close metallurgical control as well as addition of rare earth elements. It also needs other alloying elements such as titanium that minimize the formation of spheroidal graphite. CGI usually maintains plenty of the castability of Gray Iron Castings, but tend to have higher tensile strength and ductility. You can use heat treatment or alloying to adjust its matrix structure.

Utilization expansion

The impressive high-speed rail trains in Europe were the premier commercial CGI applications. At first, these applications had cast iron disc brakes. The brakes did not perform as expected because of severe heat checking as well as cracks. CGI came and cured all this. Today, it is the perfect solution for many real-world applications.

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