PRELIMINARY INVESTIGATION ON NEW GRADE OF ARMOUR

STEEL - PROTAC 500

J. Bernetič

I. Tomažič

Arcroni Jesenice, Slovenia

M. Marčetič

G. Kosec

Arcroni Jesenice, Slovenia

T Vuherer

K. Gotlih

University of Maribor, Faculty of Mechanical Engineering, Slovenia

Z. Burzić

N. Ilić

Military Technical Institute, Serbia

B. Veljanovski,

Yugoimport – SDPR, Serbia

B. Kosec

University of Ljubljana, Faculty of Natural Sciences and Engineering, Slovenia

A.Paligorić

Abstract:  An investigation of new PROTAC 500 armour steel was conducted. Three plates were heat treated to different states. One was quenched, second and third were quenched and low temperature tempered at 220°C and 280°C for 3 hours. A tensile test, hardness measurements, and an instrumented Charpy test were performed. Metallography was performed by optical microscopy (OM). Ballistic resistances of all three steel plates were measured. The behaviour of steel was tested using armour piercing projectiles 7.62´39 mm API BZ. The best results were obtained in quenched state.