COMPOSITE MATERIAL ON BASE OF TITANIUM ALLOY AND PROCEDURE FOR ITS MANUFACTURE Russian patent published in 2018 - IPC C22F1/02 B32B7/02 C23C8/06 C22F1/18 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to composition and method of manufacturing a composite material with predetermined properties, for example high-class armor protection elements, cutting elements, machine components. Composite material based on a titanium alloy consists of a base metal of a titanium alloy and a modified surface layer. Modified surface layer consists of a face layer with a ceramic structure, layer with a cermet structure and a layer with a transition structure from the cermet layer to the base metal of the titanium alloy and contains a saturated solid solution of nitrogen in titanium with TiN_x ceramic particles embedded in it, and/or TiC_x, and/or Ti_xN_yC_z. Face layer has a thickness of 0.08 mm to 0.5 mm and a hardness of at least 62 HRC. Layer with a cermet structure has a thickness of 0.5 to 24 mm and a hardness of 50 HRC to 74 HRC. Layer with a transition structure has a thickness of 5 to 10 % of thickness of cermet layer and a hardness of 60 to 30 HRC, reducing during the transition from the layer with the cermet structure to the base metal of the titanium alloy. Method of manufacturing a composite material includes heating surface of a titanium alloy with a highly concentrated moving source of thermal energy in a gas atmosphere, containing modifying components. Heating and remelting of the surface of the titanium alloy is carried out by a plasma submerged arc of direct action with a specific heat flux at the center of the spot from 10⁴ to 10⁵ W/cm², current strength of 50–450 A, arc voltage from 20 to 40 V, and a travel speed of a thermal energy source relative to the surface of the titanium alloy from 0.003 to 0.01 m/s, and the gas atmosphere contains a mixture of argon with the addition of modifying nitrogen and/or carbon components in the form of a carbon-containing gas.

EFFECT: material is characterized by high strength, hardness, thermal and corrosion resistance and wear resistance.

8 cl, 3 dwg, 1 tbl