REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

microstructure and properties of different preforms for cartridge case production

Nada ilić

Military Technical Institute, Belgrade, nadalic67@vti.vs.rs

ljubica radović

Military Technical Institute, Belgrade, ljubica.radovic@vti.vs.rs

milorad stanić

Sloboda Comany d.o.o,  Čačak

Abstract: The aim of this work was to evaluate properties of two different preforms for production of 23mm steel cartridge case. Full scale testing, including chemical composition, macrostructure, microstructure and hardness were used. It was assumed that both metallurgical properties, presence of slag and coarse inclusions, as well as process parameters affected those defects that appeared during production of cartridge case from ČR2. In the macrostructure and microstructure of the C10E steel bars, different defects were observed which may have decrease formability during deformation.

Keywords: C10E steel,ČR2 steel, cartridge case, slag, inclusions.