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A kind of preparation technology of medium-strength corrosion-resistant high-magnesium aluminum alloy plate

A high-magnesium aluminum alloy and a preparation process technology, which is applied in the field of aluminum alloy processing, can solve the problems of flatness and thickness only controlled by rolls, cannot achieve cold-rolling work hardening, and performance degradation of heat-affected zone, etc., and achieves high flatness. , The effect of shortening production time and low internal stress

Active Publication Date: 2017-07-07
广西南南铝加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cold-rolled work-hardening process has the following disadvantages: (1) After the final annealing of the cold-rolled rolled plate, the structure is a rolling structure. During the welding process, due to the transfer of temperature, the performance of the heat-affected zone will decrease significantly; (2) ) Due to the limitation of the opening of the cold rolling mill, the cold rolling process can only produce plates with a thickness below 10mm, and the plates with larger thicknesses cannot be hardened by cold rolling; (3) The flatness and thickness of the rolled plates are only obtained by rolling Control, precision is difficult to grasp

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]According to the mass percentage of each metal element in the alloy: Mg 4.48%, Mn 0.7%, Zn 0.02%, Cu0.04%, Fe 0.3%, Si 0.15%, Cr 0.10%, Ti 0.02%, the balance is Al and others Avoid impurity elements to carry out the batching of high-magnesium aluminum alloy plates, put the raw materials weighed into the tiltable melting furnace for melting, the melting temperature is 750°C and carry out electromagnetic stirring, sampling and testing the chemical composition to see if it meets the composition control requirements, If it is necessary to control and adjust the composition, after the composition is qualified, transfer to the tiltable holding furnace for refining and slag removal; let the molten aluminum stand for a period of time, transfer to the online degassing filter device for filtration; then enter the crystallizer to start semi-continuous For casting, the crystallizer specifications can be selected according to the requirements of the ingot. The aluminum alloy raw mater...

Embodiment 2

[0042] According to the mass percentage of each metal element in the alloy: Mg3.5%, Mn0.4%, Zn1.0%, Cu0.5%, Fe0.4%, Si0.4%, Cr0.3%, Zr0.25%, Ti 0.25%, the balance is Al and other unavoidable impurity elements to carry out the batching of high-magnesium aluminum alloy plates, put the raw materials weighed into the tiltable melting furnace for melting, the melting temperature is 750 ° C and electromagnetic stirring is performed, and sampling Detect the chemical composition to see if it meets the composition control requirements. If necessary, adjust the composition control. After the composition is qualified, transfer to the tiltable holding furnace for refining and slag removal; let the molten aluminum stand for a period of time, then transfer to online degassing filtration Then enter the crystallizer to start semi-continuous casting. The specifications of the crystallizer can be selected according to the requirements of the ingot. The aluminum alloy raw material is cast into an...

Embodiment 3

[0044] According to the mass percentage of each metal element in the alloy: Mg6.5%, Mn1.3%, Zn0.6%, Cu0.3%, Fe0.3%, Si0.08%, Cr0.1%, Zr0.18% , Ti0.2%, the balance is Al and other unavoidable impurity elements to carry out the batching of high-magnesium aluminum alloy plates, put the raw materials weighed into the tiltable melting furnace for melting, the melting temperature is 700 ° C and electromagnetic stirring is carried out , take a sample to test the chemical composition to see if it meets the composition control requirements. If necessary, adjust the composition control. After the composition is qualified, transfer to the tiltable holding furnace for refining and slag removal; Air filter device for filtration; then enter the crystallizer to start semi-continuous casting, the crystallizer specification can be selected according to the requirements of the ingot, the aluminum alloy raw material is cast into an ingot with a thickness of 520mm, and then the ingot is homogenize...

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Abstract

The invention discloses a preparation process of a medium-strength, corrosion-resistant, high-magnesium aluminum alloy plate, which belongs to the technical field of aluminum alloy processing. A preparation process for a medium-strength corrosion-resistant high-magnesium aluminum alloy plate, including batching; smelting; degassing, filtering; casting; homogenizing annealing; sawing, milling; preheating; hot rolling; Stretching; sawing; Wherein, the stretching refers to that after the plate is naturally cooled, it is first trimmed, and then stretched on the stretching machine, and the stretching amount is 3‑7%. Compared with the high-magnesium aluminum alloy plate prepared by the traditional cold rolling method, the preparation process of the present invention can break through the limitation of the opening of the cold rolling mill and produce a plate with a larger thickness. The obtained plate has high flatness, low internal stress, and low cold deformation. Uniform, excellent corrosion performance.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to a preparation process of a medium-strength corrosion-resistant high-magnesium aluminum alloy plate. Background technique [0002] High-magnesium aluminum alloy plate is widely used in ships, armor, transportation and other fields. Compared with steel, the advantages of aluminum alloy are: low density, corrosion resistance, non-magnetic, good performance in low temperature environment and so on. Therefore, it is the general trend to replace steel with aluminum in the above-mentioned transportation industry. [0003] The production method of high-magnesium aluminum alloy high-strength and corrosion-resistant plates is mainly cold rolling work hardening process. The typical production process of rolled plate is as follows: batching; smelting; refining, degassing, filtering; casting; homogenizing annealing; sawing head and tail; milling; preheating; ;Crosscutting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/047C22C1/02C22C21/06B21C37/02
Inventor 何建贤赵启忠李春流黄奎
Owner 广西南南铝加工有限公司
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