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Heat treatment method capable of improving surface quality of aluminum profile

A heat treatment method and surface quality technology, which is applied in the field of heat treatment to improve the surface quality of aluminum profiles, can solve problems such as surface oxidation, graying, and blackening of profiles, and achieve the goals of improving anti-corrosion performance, increasing strength and hardness, and improving surface quality Effect

Inactive Publication Date: 2018-06-29
SHANDONG NANSHAN ALUMINUM +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most aluminum profiles are produced by on-line quenching heat treatment. For aluminum profiles with large thickness and strong quenching sensitivity, the online quenching method cannot guarantee their mechanical properties. If the off-line quenching method is used, the surface of the profile will inevitably It will be oxidized, resulting in graying, darkening or even blackening, which will affect the quality of the profile, and also have a negative impact on the anti-corrosion performance of the profile

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Use the following steps to heat treat the aluminum profile: (1) put the aluminum profile in the quenching furnace, and conduct solution treatment at 525°C for 3 hours; into the rare earth organic solvent; wherein, the rare earth organic solvent is configured by rare earth chloride and methanol according to the mass ratio of 5:100.

[0031] (3) Rapidly transfer the aluminum profile that has undergone solid solution treatment to a rare earth solvent below 40°C for cooling treatment; wherein, each L of rare earth solution contains 0.6g of rare earth chloride, CrCl 2 5.4g, MnCl 2 3.1g, NaOH 6g, CsF 3.7g.

[0032] (4) Put the completely cooled aluminum profile in an aging furnace for aging treatment, the temperature of the aging treatment is 162°C, and the holding time is 12.4 hours.

[0033] In this example, the alloy content of each component of the aluminum profile is: Si 0.94wt%, Fe 0.21wt%, Cu0.05wt%, Mn 0.56wt%, Mg 0.92wt%, Cr 0.1wt%, Zn 0.1wt% , Ti 0.05wt%, the ba...

Embodiment 2

[0035] Use the following steps to heat treat the aluminum profile: (1) put the aluminum profile in the quenching furnace, and conduct solution treatment at 527°C for 2.7 hours; into the rare earth organic solvent; wherein, the rare earth organic solvent is configured by rare earth chloride and methanol according to the mass ratio of 2:100.

[0036] (3) Rapidly transfer the aluminum profile that has undergone solid solution treatment to a rare earth solvent below 40°C for cooling treatment; wherein, each L of rare earth solution contains 0.72g of rare earth chloride, CrCl 2 4.8g, MnCl 2 2.4g, NaOH 6.8g, CsF 4.1g.

[0037] (4) Put the cooled aluminum profiles in an aging furnace for aging treatment, the aging treatment temperature is 165°C, and the holding time is 11.5 hours.

[0038] In this embodiment, the alloy content of each component of the aluminum profile is: Si 0.7-1.3wt%, Fe 0.5wt%, Cu0.1wt%, Mn 0.4-1.0wt%, Mg 0.6-1.2wt%, Cr 0.25wt% %, Zn 0.2wt%, Ti 0.1wt%, the ba...

Embodiment 3

[0040] Use the following steps to heat treat the aluminum profile: (1) put the aluminum profile in the quenching furnace, and conduct solution treatment at 534 ° C for 1.75 hours; into the rare earth organic solvent; wherein, the rare earth organic solvent is configured by rare earth chloride and methanol according to the mass ratio of 8:100.

[0041] (3) Rapidly transfer the aluminum profile that has undergone solid solution treatment to a rare earth solvent below 40°C for cooling treatment; wherein, each L of rare earth solution contains 0.82g of rare earth chloride, CrCl 2 7g, MnCl 2 2.3g, NaOH 5.9g, CsF 4.9g.

[0042] (4) Put the completely cooled aluminum profile in an aging furnace for aging treatment, the aging treatment temperature is 169°C, and the holding time is 10.4 hours.

[0043] In this embodiment, the alloy content of each component of the aluminum profile is: Si 0.7-1.3wt%, Fe 0.5wt%, Cu0.1wt%, Mn 0.4-1.0wt%, Mg 0.6-1.2wt%, Cr 0.25wt% %, Zn 0.2wt%, Ti 0.1wt%...

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Abstract

The invention provides a heat treatment method capable of improving the surface quality of an aluminum profile, and belongs to the field of metal heat treatment technologies. The heat treatment methodcomprises the steps that the aluminum profile is subjected to solution treatment under the rare earth organic solution existing condition at the temperature of 525-535 DEG C, then, the aluminum profile subjected to solution treatment is transferred into a rare earth solution to be subjected to cooling treatment, and after cooling, aging treatment is conducted. Through the solution treatment and aging treatment, the strength and hardness of the aluminum profile are improved, in addition, treatment is conducted by adopting a rare earth organic solvent and a rare earth solvent in the solution treatment and cooling processes, and aluminum profile oxidization is prevented.

Description

technical field [0001] The invention relates to the field of metal heat treatment technology, in particular to a heat treatment method for improving the surface quality of aluminum profiles. Background technique [0002] Aluminum profiles have many advantages such as light weight, good formability, corrosion resistance, high strength, long life, and less pollution, and are widely used in rail transit, automobiles, aerospace and other fields. At present, most aluminum profiles are produced by online quenching heat treatment. For aluminum profiles with large thickness and strong quenching sensitivity, the online quenching method cannot guarantee their mechanical properties. If the offline quenching method is used, the surface of the profile will inevitably It will be oxidized, resulting in graying, darkening or even blackening, which will affect the quality of the profile, and also have an adverse effect on the anti-corrosion performance of the profile. Contents of the inven...

Claims

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Application Information

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IPC IPC(8): C22F1/04C22F1/043C22F1/047C22F1/05C22C21/00C22C21/02C22C21/08
CPCC22F1/04C22C21/00C22C21/02C22C21/08C22F1/002C22F1/043C22F1/047C22F1/05
Inventor 程仁策张涵源程仁寨王兴瑞肖栋任阁张启东
Owner SHANDONG NANSHAN ALUMINUM