An Advanced Casting Technology for the Recycling of High-Tensile Steel Sheet Press Edge

Manganese (Mn), which is one of the common constituents of cast iron, should be present in larger and larger quantities in the near future due to the increased usage of high-tensile steel sheet in automotive industry foundries. When the quantity of Mn augments in cast iron, the production of high-ductile spheroidal graphite cast iron, for example for the production of steering knuckles and many other car parts, is compromised because of decreased elongation and greater hardness. The technology presented in this paper dramatically increased the elongation of spheroidal graphite cast iron with a high concentration of Mn. It is the fundamental technology to recycle press edge from high-tensile steel sheet as a raw material for cast iron. It is also a universal technology which can control metal structure in the casting process, and should contribute to the development of future cast iron materials.