Tohoku Univ. Technology : Spherical Graphite Cast Iron Semi-Solid casting method : T16-106
Method for producing fine and uniform Ductile cast iron
In recent years, the development of lightweight and strong spherical graphite cast iron (ductile cast iron) has been promoted from the viewpoint of CO2 emission reduction and fuel efficiency reduction for automotive parts. In addition, efforts have been made to make ductile cast iron with highly productive die casting from the viewpoint of manufacturing cost reduction. In conventional die casting, heat treatment is necessary to suppress the generation of chill. In addition, the number of spheroidal graphite cast iron produced was small, and the mechanical properties such as strength and elongation were not sufficiently obtained. The ductile cast iron in which the spheroidal graphite is further refined and made uniform in the as-cast state without heat treatment can be obtained by combining a technique for suppressing chilling by free nitrogen with a semi-solidification casting technique.
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The revenue generated from technology transfer is reinvested as new research funding for universities and researchers, and is utilized to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will vigorously promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by signing basic technology transfer agreements with the following universities (as of June 1, 2025): Tohoku University, Hirosaki University, Iwate University, Akita University, Fukushima University, Yamagata University, Tohoku Gakuin University, Iwate Medical University, Fukushima Medical University, Aizu University, Miyagi University, Hokkaido University, Muroran Institute of Technology, and Showa Medical University.
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