ALUMINUM-BASED MATERIAL Russian patent published in 2005 - IPC

FIELD: aluminum metallurgy.

SUBSTANCE: claimed material contains zinc, magnesium and nickel and has structure consisting matrix formed from aluminum solid solution with homogeneously dispersed particles of secondary precipitates and homogeneously dispersed particles of crystal-originated nickel aluminide In particular material contains (vol %): nickel aluminides 5.3-7.0, and balance: matrix. Matrix as dispersed particles of secondary precipitates contains 6-10 vol % of phase T' particles being metastable modification of T(Al₂Mg₃Zn₃) phase with average diameter not more than 50 nm and equilibrium solidus temperature not less than 540⁰C. In particular embodiment of invention material contains globular nickel aluminides with average diameter not more than 5 mum. Material has Brinell hardness at least 160 and is made in form of castings having ultimate resistance of ς_B at least 510 MPa, yield strength ς_0.2 at least 420 MPa, aspect ratio δ at least 4 %. Material also may be made in form of strained half-staffs having ultimate resistance of ς_B at least 570 MPa, yield strength ς_0.2 at least 480 MPa, aspect ratio δ at least 5 %. Material of present invention is useful in product manufacturing, operated at 150-200⁰C.

EFFECT: new material capable to heat hardening with improved mechanical characteristics.

5 cl, 3 tbl, 2 ex