PRODUCTION OF BORON-BEARING METAL-MATRIX COMPOSITE BASED ON ALUMINIUM SHEET

摘要

FIELD: metallurgy.SUBSTANCE: this process comprises preparation of aluminium melt containing the following elements in wt %: manganese - 0.5-2, magnesium - 0.5-4, silicon - 0.1-0.3, scandium - 0.15-0.3. Boron-bearing particles are formed in aluminium melt by adding of foundry alloy containing the mix of powders TiBand salts NaCl, MgCland KCl. Melt temperature in foundry alloy mixing is kept equal to 720-800°C for 30-45 minutes. Ingot is made by melt crystallisation and homogenization. Sheet is produced by ingot deformation while strained semi-finished product is annealed at 250-350°C. Produced sheets feature composite structure including the particles of TiBin amount of 4 to 8%.EFFECT: higher strength without homogenization and quenching.2 cl, 2 ex, 2 tbl