Precision forming aluminum alloy material suitable for high-toughness structural part of new energy automobile and preparation method of precision forming aluminum alloy material

Abstract

The invention belongs to the technical field of aluminum alloy, and particularly relates to a precise forming aluminum alloy material suitable for a high-toughness structural part of a new energy automobile and a preparation method of the precise forming aluminum alloy material. 5.0 wt% to 7.0 wt% of Mg; zr: 0.2 wt% to 0.6 wt%; 0.1 wt% to 0.5 wt% of Sm; gd: 0.5 wt% to 0.8 wt%; cu: 0.8 wt% to 1.2 wt%; 0.6 wt% to 1.0 wt% of Zn; fe: lt; the aluminum alloy comprises the following components in percentage by weight: 0.5 wt% of Al, 3.0 wt%-7.0 wt% of silicon carbide whiskers, the sum of inevitable impurities such as Ti, B, Ca and the like is controlled to be 0.1 wt% or below, and the balance of Al. The yield strength of the material reaches 410-510 MPa, the tensile strength reaches 310-350 MPa, and meanwhile the ductility of the material is not lower than 12%.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to a precision-molded aluminum alloy material suitable for high-strength and tough structural parts of new energy vehicles and a preparation method thereof. Background technique [0002] Aluminum alloy components for new energy vehicles mainly include body, wheels, chassis, anti-collision beams, floors, power batteries and seats. The body includes the body frame made of high-performance aluminum profiles, the skin and doors made of high-precision aluminum plates, the aluminum alloy wheels and chassis include high-strength large-section aluminum profile structural parts and aluminum alloy forgings, and the anti-collision beam made of aluminum profiles Bumpers, new energy bus floors, lithium-ion batteries, aluminum-ion batteries (including battery positive aluminum foils, battery aluminum shells and battery aluminum trays), new energy bus seat systems, etc. The ap...

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Problems solved by technology

[0003] At the same time, the current ADC12 aluminum alloy is far from meeting the requirement of elongation of more than 6% for automotive structural parts. The existing Al-Mg alloys have problems such as low strength, poor casting performance, and difficult die-casting.

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