Wyniki wyszukiwania - BazTech

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Composite space armours with the bainitic-austenitic and maraging steel layers

Wiśniewski A., Garbarz B., Burian W., Marcisz J.

Problemy Techniki Uzbrojenia

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2013

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R. 42, z. 128

33--41

EN

The paper includes results of firing tests of the steel plates with nano-structures, i.e. bainitic NANOS-BA® and maraging of size 50x50x5-10 mm, 100x100x5-10 mm and 150x150x5-10 mm, placed on the armour plate RHA (Rolled Homogenous Armour) type Armox 500T or Armox 600T of size 500x500x10 mm, so called "witness plate". There are also presented results of firing tests of the composite space panels CAWA-3+ and CAWA-4 for protection of light armoured vehicles against the anti-tank ammunition type B-32 of 12.7 mm and 14.5 mm calibre. The space panels of size 3300x17.2-22 mm and 254x300x17.2-22 mm were placed at the distance L< 150 mm from the protected thin armour RHA type Armox 500T of 8 mm thickness. These panels included, among others steel plates with nano-structures (of size from 150x150x5-10 mm to 300x350x7-8 mm), i.e. bainitic NANOS-BA® and maraging, armoured steel plates and light metal plates. Effective stopping Af se projectiles in the tested panels was achieved without any traces of the projectile impact on toe RHA plate of 8 mm thickness.

PL

Artykuł zawiera wyniki badań ostrzałem płyt ze stali nanostrukturalnych, tj. bainitycznych NANOS-BA® i maraging o wymiarach 50x50x5-10 mm, 100x100x5-10 mm oraz 150x150x5-10 mm umieszczonych na płycie pancernej RHA (Rolled Homogenous Armour) typu Armox 500T lub Armox 600T o wymiarach 500x500x10 mm, tzw. płycie "świadek" Przedstawiono również wyniki ostrzałów kompozytowych paneli przestrzennych CAWA-3+ i CAWA-4 do ochrony o opancerzonych pojazdów przed przebiciem pociskami przeciwpancernymi B-32 kalibru 12.7 mm i 14.5 mm. Panele przestrzenne o wymiarach 300x300x17.2-22 mm i 254x300x17.2-22 mm umieszczono w odległości L < 150 mm od ochranianego cienkiego pancerza RHA typu Armox 500T o grubości 8 mm. Panele te zawierały między innymi płyty ze stali nanostrukturalnych (o wymiarach od 150x150x6-10 mm do 300x350x7-8 mm), tj. bainityczne (NANOS-BA®) i maraging, stalowe płyty pancerne oraz płyty z metali lekkich. Uzyskano skuteczne zatrzymanie tych pocisków w badanych panelach bez śladów uderzenia pocisku na płycie RHA o grubości 8 mm.

2

The Nano-Duplex NANOS-BA Steel for Application in Construction of Armours

Garbarz B., Burian W., Marcisz J., Wiśniewski A.

Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa

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2012

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Vol. 3, Nr 4 (10)

7-22

EN

The paper presents mechanical and physical properties measured in static conditions, and some properties determined in dynamic conditions, of plates of new nano-composite bainite-austenite (NANOS-BA) steel to be used for construction of armours. Firing tests of NANOS-BA steel plates fixed on a base plate of RHA (Rolled Homogenous Armour), Armox 500T and Armox 600T steel, carried out by means of 12.7 mm B-32 projectiles have demonstrated that in the conditions of tests, NANOS-BA steel shows better protective properties than 500BHN and 600BHN – grade commercial plates. NANOS-BA steel plate of minimum 5 mm thickness has protected Armox 500T and Armox 600T plate from piercing. Quantitative effects were assessed of firing the NANOS-BA steel plates of 50 x 50 mm and 100 x 100 mm surface dimensions, and thickness in the range of 5÷10 mm, as well as sets of the NANOS-BA steel plates of 100 x 100 x (4÷8) mm dimensions, arranged in layers on the base plate. It was determined that ballistic limit V50 for NANOS-BA plate of 6.0 mm thickness, for the 7.62 x 51 mm M61 AP (Armour Piercing) projectile, amounts to 797±10 m/s. Based on the analysis which compared results of tests carried out with the application of various parameters it was estimated that the value of V50 obtained for NANOS-BA steel is higher than the parameters of the highest grade steel plates offered in the global market. The tests imply that NANOS-BA steel is a prospective material for armour construction which can enable to reduce weight of armours and/or to improve their protective parameters in comparison with the presently used structures. Due to very high protective capability, monolithic plates of NANOS-BA steel can be used as one of the layers of the composite armour.

3

New Nano-Precipitates Hardened Steels of Wide Range of Strength and Toughness and High Resistance to Piercing With Projectiles

Marcisz J., Garbarz B., Adamczyk M., Wiśniewski A.

Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa

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2012

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Vol. 3, Nr 4 (10)

39-54

EN

Results of tests of mechanical properties and resistance to perforation with small-calibre armour-piercing projectiles for new designed grades of nano-precipitates hardened steels have been presented. The results comprise of mechanical properties essential for materials used in armour and microstructure which influences the mechanisms of piercing. Plate segments of high-alloyed maraging steels and low-carbon Ni-Mo steels were produced using semi-industrial lines for melting, casting and thermo-mechanical treatment. Plate segments were produced with the use of different parameters of final heat treatment in order to achieve a wide range of mechanical properties. Preliminary assessment of the protection capability concerning piercing was carried out based on the results of firing tests with 12.7 mm B-32 incendiary projectiles at square steel plates of 50÷150 mm in dimension and of 5÷10 mm in thickness placed on an RHA (Armox 500T and Armox 600T) "witness" plate. A minimal thickness of plates which protected the "witness" plate and did not fragment was determined. The microstructure in the area of the projectile impact was examined. The usability of newly designed grades of steel in layered armour and the possibilities of the production of these plates from the steel in domestic steel plants were pointed out.

4

Badania stali pancernych w aspekcie ich skuteczności ochronnej

Starczewski L., Szczęch S., Tudyka D.

Prace Instytutu Metalurgii Żelaza

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2010

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T. 62, nr 1

110-117

PL

Podstawowym kryterium oceny właściwości funkcjonalnych stosowanych w budowie pojazdów wojskowych blach pancernych jest ich odporność na przebicie pociskami przeciwpancernymi. W prowadzonych badaniach, zastosowano metodę wyznaczenia krytycznej prędkości uderzenia pocisku w badaną blachę dla której zachodzi prawdopodobieństwo 50% skuteczności ochronnej - kryterium V50. W referacie zostanie opisana metodyka badań i sposób wyznaczania krytycznej prędkości V50. Zostaną przedstawione, niepublikowane dotychczas, wyniki badań uzyskane dla blach pancernych o grubościach 3,5 mm do 8 mm ostrzelanych pociskami przeciwpancernymi kalibru 7,62 mm. Uzyskane wartości krytycznych prędkości zostaną zestawione z wynikami badań właściwości mechanicznych i budowy strukturalnej blach.

EN

Resistance to perforation by armour-piercing missiles is a fundamental criterion in assessment of the functional properties of armour plates used in construction of the military vehicles. The method of determination of the critical velocity of missile hit into the examined plate, with 50% probability of protective effectiveness - V50 criterion was applied in the concerned research. The paper will present the methodology of research and manner of determining the critical velocity V50. The hitherto unpublished results of research will be presented, obtained for armour plates of thickness from 3.5 mm to 8 mm, shot with armour-piercing missiles, calibre 7.62 mm. The achieved values of critical velocities shall be compared with results of mechanical properties tests and examination of structural composition of plates.

5

Model obliczeniowy do oszacowania odporności balistycznej pancerzy stalowych

Sperski M.

Zeszyty Naukowe Akademii Marynarki Wojennej

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2009

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R. 50 nr 4 (179)

51-59

PL

Przedstawiono nieskomplikowany model obliczeniowy do oszacowania zdolności na przebicie pociskami karabinowymi osłon pancernych zbudowanych z materiałów ciągliwych. Metoda umożliwia wyznaczenie minimalnej grubości pancerza odpornego na ostrzał, gdy znane są masa, prędkość i kaliber pocisku oraz wytrzymałość na rozciąganie materiału, z którego wykonano pancerz. Jeżeli pocisk przebija osłonę, możliwe jest obliczenie prędkości końcowej pocisku, a także czasu przebijania.

EN

The paper presents a simple calculation model for assessment of a possibility to pierce armor plates made of ductile materials with riffle bullets. The method makes it possible to determine the plate thickness if the weight, caliber and speed of the bullet as well as the ultimate tensile strength of the plate material are known. If the bullet penetrates the armour the calculation of final velocity of bullet and the time of piercing is possible.

6

Advanced Structural Ceramic Materials: in Lieu of Preface

Pampuch R.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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1999

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Vol. 47, nr 4

325-334

EN

As an introduction to the publication dealing with research into advanced ceramic structural materials an outline of the main properties and apllications of these materials is given in the present essay.