A kind of processing method of aluminum alloy profile and aluminum alloy profile prepared therefrom

Abstract

The present application provides a processing method of an aluminum alloy profile and an aluminum alloy profile prepared therefrom, the processing method comprising steps: (1) homogenization treatment: comprising 0.42-0.52% of Mg, 0.28-0.38% of Si, ≤0.025% of Mn, ≤0.18% of Fe, ≤0.018% of Zn, ≤0.012% of Cr, ≤0.03% of Ti, the balance is Al, and the mass ratio of Si / Mg is 0.538‑0.905. Room temperature is raised to 530-580°C at a heating rate of 50-220°C / h, then kept at a temperature of 5-20h, and then cooled at a cooling rate of >100°C / h to <100°C; (2) Extrusion treatment: aluminum Rod extrusion temperature is 450-480°C, mold temperature is 450-470°C, extrusion rod speed is 3.0-4.0mm / s, and profile outlet temperature is controlled at 500-540°C; (3) On-line strong wind cooling treatment; (4) Stretching and straightening treatment; and (5) artificial aging treatment: the holding temperature is 185-195°C, and the holding time is 2-3h. The yield strength and tensile strength of the aluminum alloy profiles prepared by the above-mentioned new processing method have small fluctuations in bending processing performance, and the first pass rate of bending processing is ≥ 95%, which reduces production costs.

Description

technical field [0001] The invention relates to the technical field of metal material processing, in particular to a processing method of an aluminum alloy profile and an aluminum alloy prepared by the method. Background technique [0002] 6063 aluminum alloy is a wrought aluminum alloy that can be strengthened by heat treatment in the Al-Mg-Si series. It has the advantages of high strength, good plasticity and corrosion resistance, and is widely used in the components of doors and windows, container racks, automobiles, trains, etc. . Due to the variety of shapes and structures constructed, it is often necessary to bend aluminum alloy profiles to obtain components with specific shapes and structures. Among them, with the development of automobile lightweight, the application of aluminum alloy profiles in automobiles is becoming more and more extensive, and the requirements for aluminum alloy profiles are also getting higher and higher, especially some curved profiles that r...

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Problems solved by technology

[0004] In order to solve the problem in the prior art that the yield strength fluctuation range of the 6063 aluminum alloy is relatively large, the first pass rate of the aluminum profile bending process is low, the first aspect of the present invention provides a processing method for the aluminum alloy profile, comprising the steps of:

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