FIELD: pressure processing of metals.
SUBSTANCE: invention can be used in manufacturing of large-sized profile annular products from corrosion-resistant heat-resistant steel, in particular turbine housing. A circular blank is obtained by upsetting and subsequent piercing of an ingot of electroslag remelt with a diameter of 700 mm. The circular blank is subjected to hot drawing, calibration and hot rolling to obtain a circular blank with rectangular cross section. The blank is subjected to deformation on the expander until the required profile is formed in three cycles, each of which includes heating and expansion. Heat treatment of the profile is carried out by hardening at a temperature of 1110-1130°C, exposure for 2.0-3.0 hours, cooling in oil for 3-4 minutes. Then it is drawn at a temperature of 670-690°C with exposure for 7 hours and cooling in air.
EFFECT: obtaining large-sized circular profile products with high efficiency.
5 cl, 1 dwg, 1 tbl, 1 ex
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