METHOD FOR PROCESSING ARTICLES, WHICH ARE MADE FROM MAGNETICALLY SOFT AMORPHOUS ALLOYS Russian patent published in 2000 - IPC

FIELD: metallurgy, in particular, production of chokes, magnetic amplifiers, transformers. SUBSTANCE: method involves cryogenic treatment before annealing in order to achieve cooling of at least one 10e4-10e5 C/s. Processing time conforms to condition τ = C₁exp[-C₂αt/(R)²]+τ₂, where α is heat conductance rate (sq. m/s), R is half of mean thickness of article (m), t is total cooling time (s), C1 and C2 are constants, which depend on article shape, τ₂ is time required for transition of amorphous ally into new metastable equilibrium state. This results in possibility to increase magnetic induction B and technical saturation induction Bs, while keeping constant coercive force in low magnetic fields (below 1 erg) and decreasing it in heavy magnetic fields (above 10 erg). EFFECT: increased magnetic induction and technical saturation induction, decreased repeated magnetization losses, increased efficiency of manufactured devices. 1 tbl, 1 ex