METHOD OF INCREASING FATIGUE STRENGTH OF STRUCTURAL METALLIC MATERIALS Russian patent published in 2012 - IPC C21D7/02 C22F1/04 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, particularly, to development of methods designed to increase fatigue life of structural metals on the basis of material energy structure conversion in both production and operation. Hardening the plates of structural metallic materials comprises aging the plate by applying external mechanical effects thereon to cause cyclic expansion, varying said effects in the range of cyclic dozed compression stresses from σ = (3÷10) kg/mm² to σ_max = (+1÷+4) kg/mm² and shear stresses up to τ = (±3.0÷±5.0) kg/mm².

EFFECT: higher fatigue resistance of structural metallic materials.

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