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Method for achieving rapid low-temperature extrusion formation of 6063 aluminum alloy

An extrusion molding and aluminum alloy technology, which is applied in heat treatment equipment, quenching equipment, manufacturing tools, etc., can solve problems such as unsatisfactory results, and achieve the effects of reducing extrusion force, enhancing rheology, and increasing inhomogeneity

Active Publication Date: 2015-02-18
JIANGXI XIONGYING ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Individual domestic aluminum factories have engaged in research and production practices in this area, but the results seem to be unsatisfactory
Probably due to technical secrecy and other reasons, there are almost no reports on low-temperature rapid extrusion technology in foreign countries.

Method used

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  • Method for achieving rapid low-temperature extrusion formation of 6063 aluminum alloy
  • Method for achieving rapid low-temperature extrusion formation of 6063 aluminum alloy
  • Method for achieving rapid low-temperature extrusion formation of 6063 aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Melting and preparing (mass percentage) 6063 alloy with Si content of 0.445% and Mg content of 0.536% in the smelting and holding furnace, refining, cooling to casting temperature and holding for 20 minutes to make the temperature and composition of the alloy melt uniform, and then casting into alloy rods. Before extrusion, the aluminum rod is preheated to 435°C. The mold inlet chamfer used in the extrusion process is 37°, the discharge port is chamfered at 25°, and the outflow angle is inclined at 5°. The cooling rate of the extruded profile is 250°C / min, the mechanical properties of the profile: the tensile strength is 210MPa-218MPa, and the elongation is 9.31%-9.63%.

Embodiment 2

[0025] Melting and preparing (mass percentage) 6063 alloy with Si content of 0.453% and Mg content of 0.522% in the smelting and holding furnace, refining, cooling to casting temperature and holding for 20 minutes to make the alloy melt temperature and composition uniform, and then casting into alloy rods. Before extrusion, the aluminum rod is preheated to 425°C. During the extrusion process, the chamfering angle of the mold inlet is 35°, the chamfering angle of the outlet is 25°, and the outflow angle is inclined at 4°. The cooling rate of the extruded profile is 280°C / min, the mechanical properties of the profile: the tensile strength is 222MPa-232MPa, and the elongation is 9.15%-9.49%.

Embodiment 3

[0027] Melting and preparing (mass percentage) 6063 alloy with Si content of 0.459% and Mg content of 0.514% in the melting and holding furnace, refining, cooling to casting temperature and holding for 20 minutes to make the alloy melt temperature and composition uniform, and then casting into alloy rods. Before extrusion, the aluminum rod is preheated to 415°C. The mold inlet chamfer used in the extrusion process is 33°, the outlet chamfer is 25°, and the outflow angle is inclined 3°. The cooling rate of the extruded profile is 300°C / min, the mechanical properties of the profile: the tensile strength is 212MPa-224MPa, and the elongation is 8.91%-9.23%.

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Abstract

The invention discloses a method for achieving rapid low-temperature extrusion formation of a 6063 aluminum alloy. The method comprises the following steps: 1) preparing the following components of an aluminum alloy bar (in percentage by mass): 0.440-0.465% of Si, and 0.480-0.525% of Mg; 2) preheating the aluminum alloy bar to be 410-440 DEG C before extrusion; 3) performing mold design, thereby confirming that the chamfering of a discharge hole is 25 degrees, wherein the chamfering of a feeding hole is 30-45 degrees, and a discharge angle inclines for 3-5 degrees; and 4) rapidly quenching an extruded aluminum profile, wherein the cooling speed is up to 250-300 DEG C / minute. By increasing the content of Si and reducing the content of Mg, the rheological property of the alloy is improved, the extrusion force is reduced, and the extrusion speed is increased; preheating temperature of the alloy bar is reduced, and damage caused by heating effect is reduced; as the chamfering of the feeding hole of a mold is increased, on one hand, the pressure borne in the bridge location extrusion process is reduced, and on the other hand, as the chamfering of the feeding hole is increased, the split ratio is greatly increased, flowing and welding of metal are facilitated, the extrusion pressure is also reduced, and the extrusion speed is increased; as the profile is rapidly quenched, separation of the strengthening phase Mg2Si is inhibited, and the aluminum profiled obtained through extrusion has ideal strength.

Description

technical field [0001] The invention belongs to the technical field of metal material forming, and relates to a method for rapid extrusion forming of aluminum alloy at low temperature. Background technique [0002] 6XXX series aluminum alloy is the most widely used and most used wrought aluminum alloy, and is widely used in extruded building profiles and industrial profiles. At present, my country's aluminum alloy hot deformation extrusion process has gradually approached maturity, but there is still a big gap compared with foreign developed countries in terms of the quality of extruded products or the efficiency and standardization of extrusion production. Japan Yoshida Industry Co., Ltd. adopts low-temperature and rapid extrusion technology for aluminum profiles, and the extrusion speed reaches more than 25m / min, which is much higher than the extrusion speed of 18m / min in our country. The low-temperature rapid extrusion technology is rarely used in the domestic metal proc...

Claims

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Application Information

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IPC IPC(8): B21C23/02C21D1/667
Inventor 丁良生杨湘杰王言兵
Owner JIANGXI XIONGYING ALUMINUM
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