Abstract: The disclosure relates an Al—Mg series aluminum alloy sheet, a preparation method and use thereof. The preparation method includes: step S1, melting and casting the alloy raw materials in sequence to obtain an aluminum alloy ingot; step S2, subjecting the aluminum alloy ingot to a two-stage homogenization treatment so as to obtain a homogenized aluminum alloy ingot; and step S3, subjecting the homogenized aluminum alloy ingot to hot rolling, primary cold rolling, intermediate annealing, final cold rolling, and finished product annealing in sequence to obtain the aluminum alloy sheet.

Abstract: The present disclosure provides a 6xxx-series aluminum alloy sheet for an inner panel of a hood, and a preparation method and use thereof. The aluminum alloy sheet includes the following compositions in percentage by weight: 0.75%-0.95% of Si, 0.15%-0.35% of Mg, 0.2%-0.4% of Fe, 0.05%-0.2% of Mn, 0.06%-0.2% of Cr, less than or equal to 0.15% of Cu, and less than or equal to 0.15% of inevitable impurities in total amount, where each inevitable impurity is less than or equal to 0.05%, the balance is Al, and an atomic ratio of Mg to Si is (0.18-0.54):1. The sheet has high formability hood. After baking, the sheet has low yield strength on the premise of maintaining strength slightly exceeding strength requirement of a support structure, and further has a low strain rate sensitivity coefficient, satisfying the pedestrian protection requirement. The aluminum alloy sheet is conducive to recycle and remanufacture.

Abstract: A vehicle-mounted refrigerator with a pull rod limiting structure, comprising a refrigerator body and a pull rod, wherein a pull rod connecting base is centrally arranged on an end face of the refrigerator body, pull rod connecting grooves are arranged on the top of both sides of the pull rod connecting base, two support legs of the pull rod are rotationally connected with the two pull rod connecting grooves respectively, and two side walls of the pull rod connecting base are configured with limiting projections which abut against side walls of the support legs when the pull rod is retracted to prevent the support legs from shaking. The invention has the advantages of simple structure and convenient use. The pull rod used can be limited when retracted so as to prevent it from shaking and making noises.

Abstract: A solar rechargeable vehicle refrigerator with plug-in battery, comprising a refrigerator body (1), wherein one side of the refrigerator body (1) is provided with a battery compartment (7) and a battery pack (2) is inserted into the battery compartment (7); the front end of the battery pack (2) is centrally and symmetrically provided with a pair of unlocking buttons (3) which can relatively and transversely move, and a spring (4) is connected between two unlocking buttons (3) which are correspondingly connected with side lock rods (5), the outer ends (51) of the side lock rods (5) are inserted into the lock holes (71) on sides of the battery compartment (7). The invention has simple structure, and the battery pack can be easily taken out and fixed in place.

Abstract: An aluminum alloy sheet includes an aluminum alloy substrate having a composition containing, by mass percentage, 3.0 to 4.0% of magnesium, 0.2 to 0.4% of manganese, 0.1 to 0.5% of iron, not less than 0.03% but less than 0.10% of copper, and less than 0.20% of silicon, with the remainder being aluminum and unavoidable impurities. A peak concentration of a copper concentration distribution in a thickness direction in a region at a depth of 15 nm to 200 nm from the surface of the aluminum alloy substrate is equal to or more than 0.15%, and the aluminum alloy substrate has a recrystallized structure with an average grain size of 15 ?m or less.

Abstract: An aluminum alloy sheet for motor vehicles is produced by casting a melt, containing 3.0-3.5 mass % Mg, 0.05-0.3 mass % Fe, 0.05-0.15 mass % Si, and less than 0.1 mass % Mn, a balance substantially being inevitable impurities and Al, into a slab having a thickness of 5 to 15 mm in a twin-belt caster so that cooling rate at ¼ depth of thickness of the slab is 20 to 200° C./sec; winding the cast thin slab into a coiled thin slab subjected to cold rolling with a roll having a surface roughness of 0.2 to 0.7 ?m Ra at a cold rolling reduction of 50 to 98%; subjecting the cold rolled sheet to final annealing either continuously in a CAL at a holding temperature of 400 to 520° C. within 5 minutes or in a batch annealing furnace at a holding temperature of 300 to 400° C. for 1 to 8 hours; and subjecting the resulting sheet to straightening with a leveler.

Abstract: An aluminum alloy sheet for motor vehicles is produced by casting a melt, containing 3.0-3.5 mass % Mg, 0.05-0.3 mass % Fe, 0.05-0.15 mass % Si, and less than 0.1 mass % Mn, a balance substantially being inevitable impurities and Al, into a slab having a thickness of 5 to 15 mm in a twin-belt caster so that cooling rate at ¼ depth of thickness of the slab is 20 to 200° C./sec; winding the cast thin slab into a coiled thin slab subjected to cold rolling with a roll having a surface roughness of 0.2 to 0.7 ?m Ra at a cold rolling reduction of 50 to 98%; subjecting the cold rolled sheet to final annealing either continuously in a CAL at a holding temperature of 400 to 520° C. within 5 minutes or in a batch annealing furnace at a holding temperature of 300 to 400° C. for 1 to 8 hours; and subjecting the resulting sheet to straightening with a leveler.