Stable manufacturing method of high-strength, high-toughness and high-allowable-stress aluminum alloy thick plate for pressure vessel

A technology of allowable stress and pressure vessels, which is applied in the field of stable manufacturing of aluminum alloy thick plates, can solve problems such as the difficulty in preparing high-strength, high-toughness, high allowable stress and corrosion-resistant aluminum alloy plates, and achieve high strength and high High toughness, high allowable stress, good surface finish

Pending Publication Date: 2021-05-11
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the existing problem that it is difficult to prepare aluminum alloy plates with high strength, high toughness, high allowable stress and high corrosion resistance, and to provide an aluminum alloy for pressure vessels with high strength, high toughness and high allowable stress Stable manufacturing method for thick plates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0033] Specific implementation mode 1: This implementation mode is a stable manufacturing method of aluminum alloy thick plates for pressure vessels with high strength, high toughness and high allowable stress, which is completed according to the following steps:

[0034] 1. Weighing and smelting:

[0035] The mass percentage of Si is 0.23%-0.26%, the mass percentage of Fe is 3.2%-3.5%, the mass percentage of Cu is 4.3%-4.9%, the mass percentage of Mn is 0.34%-0.41%, and the mass percentage of Mg is 7.2%~7.5%, the mass percentage of Cr is 1.3%~1.5%, the mass percentage of Zn is 8.2%~8.5%, the mass percentage of Ti is 1.1%~1.3%, the mass percentage of B is 0.29%~0.33%, The mass percentage of Zr is 0.27% ~ 0.32% and the balance is Al, respectively weighing aluminum-silicon master alloy, aluminum-iron master alloy, electrolytic copper, magnesium-manganese master alloy, aluminum-chromium master alloy, pure zinc ingot, aluminum-titanium master alloy , aluminum-boron master alloy, ...

specific Embodiment approach 2

[0063] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one, the mass percentage of Si is 0.24%~0.26%, the mass percentage of Fe is 3.3%~3.5%, and the mass percentage of Cu is 4.5% %~4.9%, the mass percentage of Mn is 0.36%~0.41%, the mass percentage of Mg is 7.3%~7.5%, the mass percentage of Cr is 1.4%~1.5%, the mass percentage of Zn is 8.3%~8.5%, Ti The mass percentage of B is 1.2%-1.3%, the mass percentage of B is 0.30%-0.33%, the mass percentage of Zr is 0.30%-0.32%, and the balance is Al. Weigh the aluminum-silicon master alloy, aluminum-iron master alloy, Electrolytic copper, magnesium-manganese master alloy, aluminum-chromium master alloy, pure zinc ingot, aluminum-titanium master alloy, aluminum-boron master alloy, aluminum-zirconium master alloy and aluminum ingot. Others are the same as the first embodiment.

specific Embodiment approach 3

[0064] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the aluminum-silicon master alloy, aluminum-iron master alloy, electrolytic copper, magnesium-manganese master alloy, and aluminum-chromium master alloy that will be weighed in step 1 Alloys, pure zinc ingots, aluminum-titanium master alloys, aluminum-boron master alloys, aluminum-zirconium master alloys and aluminum ingots were put into a dry melting furnace, and smelted for 22 hours at a furnace gas temperature of 709°C. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a stable manufacturing method of an aluminum alloy thick plate, in particular to a stable manufacturing method of a high-strength, high-toughness and high-allowable-stress aluminum alloy thick plate for a pressure vessel. The invention aims to solve the problem that the aluminum alloy plate with high strength, high toughness, high allowable stress and high corrosion resistance at the same time is difficult to prepare in the prior art. The manufacturing method comprises the following steps of 1, weighing and smelting; 2, casting; 3, homogenizing annealing treatment; 4, heating; 5, primary hot rolling; 6, secondary hot rolling; 7, solid solution; 8, high-temperature annealing; 9, primary aging; 10, secondary aging; 11, stabilizing heat treatment; 12, stretching; and 13, tertiary aging. The stable manufacturing method is mainly used for stably manufacturing the high-strength, high-toughness and high-allowable-stress aluminum alloy thick plate for the pressure vessel.

Description

technical field [0001] The invention relates to a stable manufacturing method of an aluminum alloy thick plate. Background technique [0002] Regardless of the alloy composition or production and processing methods of existing aluminum alloys, it is difficult to prepare aluminum alloy sheets with high strength, high toughness, high allowable stress and high corrosion resistance. During the production process, when the strength meets the requirements , but the toughness and allowable stress do not meet the requirements; when the strength and toughness meet the requirements, a coarse structure phase is formed between the grains, which makes the allowable stress, corrosion resistance and fatigue performance of the plate poor, so it cannot meet the requirements of market use standards , and cannot meet the requirements of mass production in the market, so that the application of this aluminum alloy is greatly restricted. Contents of the invention [0003] The purpose of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/02C21D9/00C22B9/16C22C1/02C22C21/10
CPCB21C37/02C22C21/10C22C1/026C22B9/16C21D9/0081
Inventor 韩帅臧家吉姜鹏张旭阳侯兆敏卢潇涵李俊林谢延翠
Owner NORTHEAST LIGHT ALLOY CO LTD
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