METHOD OF FRICTION SEAM WELDING OF PARTS FROM TITANIUM ALLOYS Russian patent published in 2012 - IPC B23K20/12 B23K103/14 

FIELD: process engineering.

SUBSTANCE: invention may be used in jointing vane root and turbomachine disk together by friction, particularly, in production or repair of turbomachine monoblocks from titanium alloys. In heating, work pieces are pressed against each other along contact surface with force making welding pressure at preset amplitude and frequency of relative displacement of parts along said contact surface. Forging is performed after workpiece reciprocation shutdown on applying forging force. Workpiece forging is combined with electric pulse machining at current density of 10 MA/m² to 200 MA/m². Heating by friction is carried out in two steps with different amplitude and frequency. Application pressure varies from 30 MPa to 180 MPa while that of forging varies from 160 MPa to 320 MPa. Coefficient of welding specific power input varies from 2.2 kW to 3.2 kW.

EFFECT: forging combined with machining, higher quality and performances.

7 cl, 1 ex