MOTOR VEHICLE MOULDING RING MADE FROM ALUMINIUM/MAGNESIUM ALLOY Russian patent published in 2018 - IPC C22F1/47 C22C21/06 C25D11/08 

FIELD: motor industry.

SUBSTANCE: invention relates to a method for manufacturing an outer moulding ring of a motor vehicle, made from AA5xxx aluminium alloy, a method for manufacture thereof, in particular a window frame or body shell moulding. Method includes obtaining a strip, shaping and polishing the moulding, wherein the strip is made by continuous vertical casting of a high-purity alloy sheet of series AA5xxx, heating the sheet to a temperature of 480 to 530 °C for at least 1 hour, hot rolling to a thickness of 5 to 30 mm and cooling, cold rolling, including intermediate annealing in a continuous passage furnace, with holding between solvus temperature and the burning temperature of the alloy for 3 seconds to 5 minutes, followed by quenching in air or in water before the final cold rolling with a reduction rate of 15 to 70 % to a thickness of 0.4 to 1.5 mm.

EFFECT: invention is directed to the production of an AA5xxx series alloy, which retains its gloss in contact with a strongly alkaline solution, while maintaining the mechanical strength and formability of the sheet or strip used to obtain the final product.

8 cl, 2 dwg, 1 tbl, 4 ex