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A 2, 7-series small-section profile shaping preparation process

A preparation process and small cross-section technology, applied in the field of metal material manufacturing, can solve the problems of bending and twisting deformation that are not easy to be corrected, and achieve the effects of reducing shaping processes and labor, reducing quenching deformation and improving yield.

Active Publication Date: 2019-02-15
CHINA ZHONGWANG
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, in order to solve the problem that the bending and twisting deformation that occurs after heat treatment of 2 and 7 series aluminum alloy small-section corner profiles is not easy to be corrected, a preparation process for shaping and preparing 2 and 7 series small-section profiles is provided.

Method used

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  • A 2, 7-series small-section profile shaping preparation process

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Comparison scheme
Effect test

Embodiment 1

[0031] A 2, 7-series small-section profile shaping preparation process, the specific steps are as follows:

[0032] A. Furnace loading of ingredients: According to the process performance of aluminum alloy itself and the processing conditions of aluminum alloy processed products, the standard addition amount of each component of aluminum alloy ingredients is determined, and each component of aluminum alloy is preheated and added to the melting furnace. The temperature is 150°C, and the preheating time is 20 minutes;

[0033] B. Melting and casting: Use an electric heater to heat the melting furnace. The melting temperature of the melting furnace is 750 ° C. The aluminum alloy ingredients are melted and cast. The specific process of melting and casting is melting, stirring, slag removal, sampling and testing, standing heat preservation, refining, secondary Stirring, secondary slag removal, on-line refinement, degassing, filtration, casting, the aluminum alloy ingredient mixture...

Embodiment 2

[0043] The difference between embodiment 2 and embodiment 1 is that the deformation of the profile in step D in the length direction is 2%, and the load holding time is 20S.

Embodiment 3

[0045] The difference between embodiment 3 and embodiment 1 is that the deformation of the profile in step D in the length direction is 2.5%, and the load holding time is 30S.

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Abstract

The invention belongs to the technical field of metal material preparation and relates to a 2-7-series small-section sectional material shaping preparation process. The shaping preparation process comprises the steps that before a sectional material is squeezed and sectional material heat treatment is performed, a load in the length direction is exerted on the sectional material, the deformation of the sectional material in the length direction is 1.5-2.5%, unloading is performed after the load is maintained for 15-30 S, in other words, the squeezed sectional material is firstly subjected to stretching processing, pre-deformation is loaded on the sectional material in advance, and after heat treatment is completed, the sectional material is shrunk back in the length direction while bending and twisting deformation of the sectional material is reduced. The small-section sectional material shaping process is convenient to operate, and the finished product rate of the sectional material is increased to 80-90% from the original 20%.

Description

technical field [0001] The invention belongs to the technical field of metal material manufacturing, and relates to a shaping preparation process of 2 and 7 series small-section profiles. Background technique [0002] 2. 7-series aluminum alloys require high performance when used. High performance requires heat treatment of aluminum alloy profiles, that is, heating the aluminum alloy profiles to a higher temperature and then rapidly cooling them, and rapid cooling gives the aluminum alloy profiles It brings a large internal stress, so that the 2 and 7 series aluminum alloy profiles after heat treatment will be seriously deformed, especially the uneven wall thickness of the profiles, and the deformation of the profiles with small cross-sections is more serious. [0003] At present, 2 and 7-series aluminum alloy profiles with small cross-sections are prone to bending and twisting deformation after extrusion and heat treatment. The existing rectification technology can only sha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/04B22D11/12
CPCB22D11/003B22D11/1206C22F1/04
Inventor 苗隽杨璐齐芃芃赵鑫刘兆伟
Owner CHINA ZHONGWANG
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