Abstract
Carburizing materials (Carburizer) are used in the process of manufacturing cast iron. Types of Carburizers include electrode
graphite and coke, and Japan is dependent on imports from overseas. Since Carburizer are derived from fossil resources, reducing
the amount of Carburizer used is an issue. Since biomass is a resource of natural origin, the carbon neutral theory holds. In particular,
the effective use of waste-based biomass will lead to a reduction in waste. In recent years, coffee grounds have been discarded at
convenience stores because coffee is brewed from beans. Efforts are being made to reuse paper, but there are only a few and most
companies dispose of it. The results of previous experiments suggest that biocoke produced from woody and herbaceous biomass has
the potential to be an alternative as a carburizing material. However, woody biomass is expensive to collect. As a result, we thought that
we could solve the three points of safe suppl y of energy, environmental safety, and economic effects at the same time, and that we could
manufacture cast iron in an environmentally friendly manner. In this study, biocoke was used as a carburizing material during cast iron
production, and pig iron less casting was performed in a high frequency induction melting furnace. At that time, we investigated the
substitution of coffee grounds as a carburizing material by using a mixture of coffee grounds and wood-based biocoke and investigating
the effect on the amount of carburization and mechanical properties. As a result, it was found that substituting 100% cedar bio-coke
with coffee grounds for 30% did not affect the mechanical properties, and good cast iron castings could be produced.
