METHOD OF LINEAR FRICTION WELDING OF PARTS FROM ALUMINIUM ALLOY Russian patent published in 2024 - IPC B23K20/12 B23K103/10 

FIELD: various technological processes.

SUBSTANCE: invention can be used in production or repair of monoblocks of turbomachines from aluminium alloys using linear friction welding. Prior to friction welding, contact surfaces of elements of parts 1 and 3 are prepared. Vacuum is created in the vacuum chamber, then argon is fed into it, at pressure in range of 0.8·10^-1 to 1.0·10^-1 Pa, induction high-frequency discharge plasma is ignited, negative bias voltage from 400 to 600 V is supplied and parts contact surfaces are cleaned to remove oxides therefrom. Then, heating and forging are performed in the same vacuum chamber. Elements of part 1 and 3 are heated, pressed to each other along contact surfaces with a force providing pressure at the specified amplitude and frequency of their relative movement. After displacement is stopped, forging is performed with application of forging pressure.

EFFECT: method ensures high operational reliability of parts made of aluminium alloys produced by linear friction welding by increasing their endurance limit.

5 cl, 2 dwg, 1 ex