Eugiko Munizio Fabrika Errealeko bi burdinazko balen karakterizazioa

Abstract

Lan honetan, Eugiko Munizio Fabrika Errealean aurkituriko bi burdinazko balen analisi konparatiboa egin zen. Bala hauek, fabrikaren azken produkzio garaikoak dira (1766-1850). Hainbat teknika erabili ziren bi balen manufaktura metodoa identifikatzeko asmoz. Mikroegituraren analisiak fase ezberdinak erakutsi zituen. Analisi kimikoak moldekatze prozesuaren zehar giro oxidatzaile baten pean labearen tenperaturan ezberdintasunak zeudela iradokitu zuen. Mikrogogortasunaren analisiak diametroaren zehar ezberdintasunak erakutsi zituen. Ezaugarri fisikoetan eta lortutako emaitzetan oinarrituz, baletako bat metralla moduan eta bestea ribadolkinetan jaurtikitzeko bala moduko erabilerak zituztela pentsa daiteke.

A comparative analysis of two iron bullets found in The Royal Ammunition Factory of Eugi in Navarra was performed, belonging to the last years of the factory production (1766-1850). Several techniques were used in order to identify the manufacturing process of the two bullets. The analyses of the microstructures showed different phases. The variation found in the chemical analysis could suggest that the foundry temperature under oxidizing environment varied during the casting. The microhardness analyses carried out revealed hardness differences along the diameter. Based on the physical characteristics of the bullets and on the obtained results, it can be concluded that one of the bullets could have been used as a grapeshot projectile and the other one as a bullet for ribauldequins.