Extrusion process of ultra-thin aluminum alloy profile

Abstract

The invention relates to an ultra-thin aluminum alloy profile extrusion process. The process comprises the following steps that aluminum alloy cast ingots are heated, extruded, subjected to heat preservation, quenched, straightened and subjected to heat preservation, ultra-thin aluminum alloy profile is obtained, the extrusion discharge temperature is 490-510 DEG C, air-cooling is adopted for cooling at first, then water mist is adopted for rapid cooling, artificial aging treatment is conducted after straightening, a two-stage forced quenching scheme is adopted for rapid cooling, the problem that water is directly used for cooling, the cooling speed is too high, and consequently metal is fractured is solved, meanwhile, air is used for cooling at first, then water is used for cooling quenching, a certain degree of toughness can be maintained while the strength is improved, a heat insulation box is used for heat preservation, the situation that water is splashed on a mold in the quenching process is avoided, the usage safety is improved, and the service life of the mold is prolonged.

Description

technical field [0001] The invention relates to the production field of aluminum alloy profiles, in particular to an extrusion process for ultra-thin aluminum alloy profiles. Background technique [0002] As a material, aluminum and aluminum alloys are playing an increasingly important role in more and more fields with the maturity of their production and processing technology. The application of aluminum and its alloys in many fields is inseparable from its excellent performance. Aluminum extruded products are one of the four major categories of aluminum primary processing products. It is still after the aluminum ingot is heated to the plastic temperature, and the extruder uses the power of oil pressure to extrude the aluminum (alloy) ingot through the extrusion type. The die becomes the required profile. In the redesign and manufacture of aluminum extrusion, objects with complex shapes can be directly extruded, and high strength can be obtained, so it is widely used. Chi...

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Problems solved by technology

[0003] Therefore, in view of the above-mentioned problems, the present invention proposes an ultra-thin aluminum alloy profile extrusion process, which solves the problem that the online quenching is relatively close to the extrusion end. The mold causes damage, and direct quenching with water may cause the ultra-thin aluminum alloy profile to cool too quickly, resulting in excessive internal stress, which in turn leads to a decrease in the strength of the aluminum alloy profile, and in extreme cases may lead to technical problems of damage