METHOD OF THERMOMECHANICAL PROCESSING OF RODS FROM BIPHASE TITANIUM ALLOYS FOR PRODUCING LOW VALUES OF LINEAR EXPANSION THERMAL COEFFICIENT IN ROD AXIS DIRECTION Russian patent published in 2017 - IPC C22F1/18 B21C37/04 

Abstract RU 2625376 C1

FIELD: metallurgy.

SUBSTANCE: method of thermomechanical processing of rods from biphase titanium alloys with a molybdenum equivalent of 3.3 to 22% includes hardening of the rod and its cold deforming. Before hardening, the rod is subjected to hot deformation at the temperature in the range of 500°C through Tpt-20°C with the axial texture β-phase <110> with a pole density of, at least, three. Hardening of the rod is carried out at temperatures ranging from 720°C to Tpt followed by a cold deformation along the axis of the rod at the temperature of not more than 300°C and with a relative elongation of 1 to 30%, where Tpt - the temperature of the polymorphic transformation of the alloy.

EFFECT: alloy is characterized by a low thermal coefficient of linear expansion at high strength and satisfactory plasticity.

1 dwg, 2 tbl, 1 ex

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RU 2 625 376 C1

Authors

Demakov Sergej Leonidovich

Stepanov Stepan Igorevich

Gadeev Dmitrij Vadimovich

Dates

2017-07-13Published

2016-03-21Filed