ALUMINIUM ALLOY-BASED LAMINAR ARMORED PLATE (VERSIONS) Russian patent published in 2012 - IPC F41H5/04 

FIELD: metallurgy.

SUBSTANCE: proposed plate comprises front, medium and rear layers from aluminium alloys and thin layers of thickness making 1-3% of said plate arranged between aforesaid layers and on outer surfaces of front and rear layers. Note here that said thin layers are made from aluminium alloy containing Zn, Si, Mn, Fe, Ti and admixtures with different ratio of components in wt %. Thickness of front and rear layers makes 3-23% of thickness of plate from aluminium alloy containing Zn, Mg, Mn, Cr, Ti, Zr, Cu, Fe, Si and admixtures. Medium layer is made from aluminium alloy containing Zn, Mg, Mn, Cr, Ti, Zr, Cu, Fe, Si and admixtures, while total content of Zn and Mg making 7.0-10.8 wt %. Laminar armored plate comprises additionally 1 to 3 thin layers dividing rear layer into equal parts.

EFFECT: higher strength and safe stress level σ_cr in welded structures.

2 cl, 2 dwg,1 tbl