Applicability of Permanent Mold Casting for Lead Free Bronze with Sulfide Dispersion (Post-Print Version)

摘要

The leaded bronze, the leaded brass, the lead free bronze including bismuth and the lead free bronze with sulfide dispersion were cast into the permanent mold for thesolidification cracking test. The applicability of the permanent mold casting process for bronzes was evaluated with comparison of the range of the solidificationtemperature. The lead free bronze with sulfide dispersion was more unbreakable than the other copper alloys. There were differences of the dendrite form near by the fracture and the distribution of the residual melt segregated at a part of theend of the solidification. The lead free bronze with sulfide dispersion may have a solidification form being unlikely to crack. It dispersion is possible to apply the permanent mold castings process rather than the other copper alloys, and the applicability is almost same as brass castings.