Processing method of aluminum alloy profile and aluminum alloy profile prepared with method

Abstract

The invention provides a processing method of an aluminum alloy profile and the aluminum alloy profile prepared with the method. The processing method comprises steps as follows: (1), homogenizing treatment: aluminum bars comprising 0.42%-0.52% of Mg, 0.28%-0.38% of Si, smaller than or equal to 0.025% of Mn, smaller than or equal to 0.18% of Fe, smaller than or equal to 0.018% of Zn, smaller thanor equal to 0.012% of Cr, smaller than or equal to 0.03% of Ti and the balance Al are heated to 530-580 DEG C from the room temperature at a heating rate of 50-220 DEG C / h, a mass ratio of Si to Mg is0.538-0.905, the temperature is kept for 5-20 h, and then the aluminum bars are cooled at a cooling rate of smaller than 100 DEG C / h and cooled to be lower than 100 DEG C; (2), extruding treatment: the extruding temperature of the aluminum bars is 450-480 DEG C, die temperature is 450-470 DEG C, the speed of an extruding bar is 3.0-4.0 mm / s, and the temperature of a profile outlet is controlled at 500-540 DEG C; (3), online strong wind cooling treatment; (4), stretch strengthening treatment; and (5), artificial aging treatment: the heat preservation temperature is 185-195 DEG C, and the heatpreservation time is 2-3 h. The aluminum alloy profile prepared with the new processing method has small yield strength and tensile strength fluctuation and good bending processing performance, firstpass yield of bending processing is higher than or equal to 95%, and production cost is reduced.

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...

AI Technical Summary

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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