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Aluminum alloy plate for liquefied gas storage tank and preparation method thereof

A technology of aluminum alloy plates and gas storage tanks, applied in the field of aluminum alloys, can solve problems such as poor corrosion resistance, performance not meeting the performance requirements of liquefied natural gas storage tanks, low strength of natural gas storage tanks, etc., and achieve low energy consumption , prevent poisoning phenomenon, simple processing effect

Active Publication Date: 2019-12-13
HENAN MINGTAI AL INDUSTRIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Most of the aluminum alloys used in existing aluminum alloy gas storage tanks are 1060, 5052, 5083 and other series alloys. Among them, the natural gas gas storage tanks made of 1060 and 5052 aluminum alloys have low strength and poor corrosion resistance. Although 5083 aluminum alloys have better corrosion resistance Good, but its compressive strength is only 270-290MPa and its yield strength is 140-160MPa. Under the strict requirements for LNG gas storage tanks, the performance of 5083 aluminum alloy is far from the performance of LNG gas storage tanks. Require

Method used

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  • Aluminum alloy plate for liquefied gas storage tank and preparation method thereof

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Embodiment 1

[0044] An aluminum alloy plate for a liquefied gas storage tank, the mass percentage of each chemical element in the aluminum alloy plate is as follows: Si is 0.15%, Fe is 0.35%, Cu≤0.05%, Mn is 0.4%, Mg is 5.1%, Cr≤0.05%, Zn≤0.10%, Ti is 0.02%, and the balance is Al.

Embodiment 2

[0046] An aluminum alloy plate for a liquefied gas storage tank, the mass percentage of each chemical element in the aluminum alloy plate is as follows: Si is 0.25%, Fe is 0.45%, Cu≤0.05%, Mn is 0.5%, Mg is 5.4%, Cr≤0.05%, Zn≤0.10%, Ti is 0.03%, and the balance is Al.

Embodiment 3

[0048] An aluminum alloy plate for a liquefied gas storage tank, the mass percentage of each chemical element in the aluminum alloy plate is as follows: Si is 0.20%, Fe is 0.40%, Cu≤0.05%, Mn is 0.45%, Mg is 5.3%, Cr≤0.05%, Zn≤0.10%, Ti is 0.02%, and the balance is Al.

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Abstract

The invention discloses an aluminum alloy plate for a liquefied gas storage tank and a preparation method thereof. The aluminum alloy plate contains chemical elements such as Si, Fe, Cu, Mn, Mg, Cr, Zn, Ti, the balance Al, and the like. In the preparation method, an independent soaking treatment process is adopted, and through a good soaking control process, the composition segregation of a cast ingot is effectively eliminated, the inner stress of the cast ingot is reduced, and the chemical compositions are uniform; the aluminum alloy plate for liquefied natural gas prepared through the invention is an O-state finished product with the tensile strength reaching to 310 to 320 MPa, the ductility being 25 to 30 percent, the yield strength being 170 to 190 MPa, and the hardness being HV80 to 90; the aluminum alloy plate is good in roller arc performance, easy to cut and weld, free of cracking, attractive in surface after treatment, and free of quality defects such as pores and included slags in the thick plate.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to an aluminum alloy plate for a liquefied gas storage tank and a preparation method thereof, and mainly relates to a special aluminum alloy plate for a liquefied natural gas storage tank and a preparation method of the aluminum alloy plate. [0002] technical background [0003] Natural gas is a combustible gas naturally extracted from gas fields, mainly composed of methane, which can be condensed into a liquid when cooled to -162°C under normal pressure. Natural gas liquefaction can greatly save storage and transportation space, and has a large calorific value and high performance. Therefore, as a clean, efficient, convenient and safe energy source, liquefied natural gas has become one of the high-quality energy sources that modern society can choose due to its high calorific value, low pollution, and convenient storage and transportation. [0004] Liquefied na...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22C1/03C22C1/06B22D43/00B22D1/00C22F1/047F17C1/14
CPCB22D1/002B22D43/004C22C1/026C22C1/03C22C1/06C22C21/08C22F1/047F17C1/14Y02E60/32
Inventor 李国锋
Owner HENAN MINGTAI AL INDUSTRIAL CO LTD
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