PROCEDURE FOR THERMAL TREATMENT OF WELDED STRUCTURES OUT OF ALUMINIUM ALLOYS AND FACILITY FOR IMPLEMENTATION OF THIS PROCEDURE Russian patent published in 2010 - IPC C22F1/04 B21D1/14 B21D3/16 C21D9/50 

FIELD: metallurgy.

SUBSTANCE: prior to heat treatment welded structure is positioned into facility consisting of case in form of steel pipe with plates arranged on its ends. One of the plates is stationary, while another travels along axis of the facility. Wedge hold-down devices are mounted on the plates; locating blocks with removable stops are installed in an interval between the plates; there is a setting gap between the removable stops. Present deformations and deviations from geometric shape are corrected by means of screw and wedge hold down devices and also with locating blocks and plates. Upon fixation of specified dimensions and shape of the structure the facility with the structure is placed in a furnace, is heated to temperature 350°C and conditioned during 0.5 hour. Then heating is terminated and the structure is removed from the furnace, when temperature drops to 150°C.

EFFECT: removing internal stresses in welded structure and maintaining its geometric shape.

2 cl, 2 dwg