▎ 摘　　要

NOVELTY - A high toughness nose clip aluminum alloy profile comprises aluminum alloy substrate. The surface of the aluminum alloy substrate is provided with an environmentally-friendly high-toughness paint film. The outer surface of the high-toughness paint film is provided with a high tenacity protective cover. The aluminum alloy profile is provided with a fixing groove. The aluminum alloy substrate comprises 2.75-5.55 wt.% chromium, 0.65-1.45 wt.% molybdenum, 0.55-1.15 wt.% tungsten, 0.18-0.54 wt.% silicon, 0.09-0.25 wt.% rhenium, 0.12-0.36 wt.% titanium, 0.08-0.21 wt.% zirconium, 0.12-0.24 wt.% iron, 0.06-0.12 wt.% boron, 0.05-0.13 wt.% germanium, 0.11-0.15 wt.% copper, 0.08-0.18 wt.% nano silicon nitride, 0.09-0.21 wt.% nano silicon carbide, and balance aluminum and unavoidable impurities. USE - High toughness nose clip aluminum alloy profile for masks. ADVANTAGE - The aluminum alloy profile uses high-toughness aluminum alloy, environmentally-friendly paint film and high-toughness protective cover, which can significantly improve the toughness of the nose clip of the mask, increase the number of folding and bending times of the nose clip, and ensure the service life of the nose clip aluminum alloy profile. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the high toughness nose clip aluminum alloy profile, which involves (1) vacuuming the intermediate frequency induction melting furnace, adding pure aluminum to the smelting furnace for smelting at 750-850 degrees C for 30-60 minutes, cooling to 690-720 degrees C, warming for 20-30 minutes, obtaining molten aluminum, increasing the temperature of molten aluminum to 1200-1500 degrees C and adding chromium, molybdenum, tungsten, rhenium, titanium, zirconium, iron, germanium and copper, turning on the ultrasonic vibration device to fully mix the alloy melt, cooling to 800-1000 degrees C at a rate of 10-15 degrees C/minute, adding balance boron, silicon, nano silicon nitride and nano silicon carbide, ultrasonically processing for 15-25 minutes, adding slag remover to alloy melt, adjusting the alloy melt composition, (2) casting the molten alloy of step (1) under vacuum conditions, obtaining alloy aluminum ingot, subjecting to homogenization heat treatment at 500-550 degrees C for 10-15 hours, air cooling to 400-450 degrees C at a rate of 10-15 degrees C/minute, extruding the alloy aluminum ingot into a bar, air cooling to room temperature at a rate of 20-25 degrees C/minute, performing solution treatment of the bar, performing continuous extrusion processing, (3) increasing the temperature of the alloy aluminum bar ingot in step (2) to 540-550 degrees C for 1-2 hours, air-cooling to 250-260 degrees C, cooling to room temperature, obtaining high-strength and high-toughness alloy aluminum, (4) subjecting the high-strength and high-toughness alloy aluminum to sheeting treatment, obtaining alloy aluminum sheet with a thickness of 1.5-2.5 mm, cutting the alloy aluminum sheet to a strip-shaped aluminum alloy substrate with a width of 2.5-4.5 mm and a length of 4.5-8.5 cm, opening strip-shaped aluminum alloy substrate with a fixed groove, bending into the shape of a mask nose clip, (5) adding aqueous elastic resin, polycarbonate, butyl acetate, leveling agent, dispersant, matting agent, elastic powder and filler into the mixing tank, warming to 120-200 degrees C, stirring, mixing, cooling to 80-120 degrees C, coating the mixed environmentally-friendly high-toughness paint on the strip-shaped aluminum alloy substrate to form the aluminum alloy substrate with a thickness of 1/10-2/5 of the environmentally-friendly high-toughness paint film, (6) combining high-density polyethylene, polycarbonate, graphene-modified cellulose, castor oil-modified hyperbranched polyurethane, butyl acetate, stearic acid, zinc stearate, graphene and carbon fiber at 150-250 degrees C for mixing in a vacuum mixing furnace, ultrasonically processing for 25-45 minutes, placing the aluminum alloy substrate coated with the environmentally-friendly high-toughness paint film in the mold, pouring the melt obtained by mixing into the mold, and cooling to room temperature.