METHOD OF THE THERMOMECHANICAL PROCESSING OF THE ARTICLES MADE OUT OF THE TITANIUM ALLOYS Russian patent published in 2008 - IPC C22F1/18 

FIELD: aerospace industry; nonferrous metallurgy; other industries; methods of the thermomechanical processing of the articles made out of the titanium alloys.

SUBSTANCE: the invention is pertaining to the field of nonferrous metallurgy, in particular, to the thermomechanical processing of the articles made out of the titanium alloys and may be used in the aeronautical engineering for manufacture of the skins, envelopes, containers, partitions, the bottoms. The invention presents the method intended to up-grade the level of the mechanical processing of the articles, which provides for the thermomechanical processing of the articles made out of the titanium alloys, including their multiple heatings up to the temperature of above or below the temperature of the polymorphic transformation Т_tp and deformation. The thermomechanical processing includes nine phases. At that at the first phase they conduct the heating of the titanium alloy up to the temperature of(T_tp +230 ÷ T_tp +270)°С, its deformation with the level of 50÷90 %; at the second phase - the heating up to the temperature of(T_tp - 20 ÷ T_tp-40)°С, the deformation with the deformation level of 30÷60 %; at the third phase - heating up to the temperature of (T_tp +60 ÷ T_tp+160)°С, the deformation with the level of 20-60%; at the fourth phase - heating up to the temperature of (T_tp-10 ÷ T_tp -40)°С, deformation with the level of 40-70%; at the fifth phase - heating up to the temperature of(T_tp -40 ÷ T_tp+200)°С, the deformation with the level of 65-95 %; at the sixth phase - heating up to the temperature of (T_tp -100 ÷ T_tp -160)°С, the deformation with the level of 40-70 %; at the seventh phase - heating up to the temperatures of(T_tp-100 ÷ T_tp -160)°С, the deformation with the level of 20-50 %; at the ninth phase - hearing up to the temperature of (T_tp -150 ÷ T_tp -190)°С, the deformation with the level of 2-5 %.

EFFECT: the invention ensures the increased level of the mechanical properties of the articles made out of the titanium alloys.

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