FIELD: metallurgy. SUBSTANCE: invention relates to heat treating of metals and alloys and may be used in mechanical engineering and other industries consuming high-strength steels with low coefficient of thermal expansion. Method includes heating to 1150 C, isothermal aging, 20% deformation when cooling to 600-620 C, isothermal aging at this temperature for 2-3 h, cooling in water, and cold deformation. EFFECT: increased strength properties. 1 tbl
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