Aluminum alloy thick plate for liquefied natural gas carrier storage cabin and manufacture method of aluminum alloy thick plate

A technology of aluminum alloy and thick plate, which is applied in the field of aluminum alloy thick plate (hereinafter referred to as "LNG aluminum thick plate") and its preparation field, can solve the problems of unsuitable transportation volume, high density and high price.

Inactive Publication Date: 2013-02-20
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Among them, Ni36 Invar alloy and Ni9% steel have excellent performance, but they should not be used in large quantities because of their high price and high density, which affects the transportation volume.

Method used

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  • Aluminum alloy thick plate for liquefied natural gas carrier storage cabin and manufacture method of aluminum alloy thick plate
  • Aluminum alloy thick plate for liquefied natural gas carrier storage cabin and manufacture method of aluminum alloy thick plate

Examples

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example 1

[0061] Example 1: The production specification is 70×1800×7500mm for 5083-O state LNG carrier spherical storage tank plate, the mass fraction contains Mg4.7%, Fe0.23%, Mn0.53%, Si0.12% , containing Ti0.0056%, Cu≤0.05%, Ni≤0.05%, the balance is Al, and Fe / Si is 1.5~2:1.

[0062] Smelting and melt treatment: the smelting process is carried out according to the general Al-Mg series aluminum alloy, that is, first batching - melting in the melting furnace - alloying - slag removal - pouring into the static furnace for refining - degassing in the furnace - static treatment - out of the furnace On-line degassing, on-line filtration-on-line grain refinement-into the crystallizer for semi-continuous casting and other processes when passing through the launder. Pay attention to control the content of harmful gases such as impurity elements, slag inclusions, hydrogen and oxygen in the melt. The focus is on degassing and filtering slag removal: nitrogen degassing is used in the furnace, ...

example 2

[0069] Example 2: The production specification is 30×1500×5000mm 5183-O state industrial LNG storage tank aluminum plate, the mass fraction contains 4.9% Mg, 0.26% Fe, 0.61% Mn, 0.12% Si, and Ti0.0045%, Cu≤0.05%, Ni≤0.05%, the balance is Al, Fe / Si is 1.5~3:1.

[0070] Smelting and melt treatment: the smelting process is carried out according to the general Al-Mg series aluminum alloy, that is, first batching - melting in the melting furnace - alloying - slag removal - pouring into the static furnace for refining - degassing in the furnace - static treatment - out of the furnace On-line degassing, on-line filtration-on-line grain refinement-into the crystallizer for semi-continuous casting and other processes when passing through the launder. Pay attention to control the content of harmful gases such as impurity elements, slag inclusions, hydrogen and oxygen in the melt. The focus is on degassing and filtering slag removal: nitrogen degassing is used in the furnace, on-line de...

example 3

[0077] Example 3: The production specification is 160 × 1800 × 7500mm. The main aluminum plate for the central shaft reinforcement of the spherical storage tank of the LNG carrier in the 5083-O state with a specification of 160 × 1800 × 7500mm, the mass fraction contains Mg4.7%, Fe0.25%, Mn0.55%, Contains Si0.11%, Ti0.0056%, Cu≤0.05%, Ni≤0.05%, the balance is Al, Fe / Si is 1.5~3:1.

[0078] Smelting and melt treatment: the smelting process is carried out according to the general Al-Mg series aluminum alloy, that is, first batching - melting in the melting furnace - alloying - slag removal - pouring into the static furnace for refining - degassing in the furnace - static treatment - out of the furnace On-line degassing, on-line filtration-on-line grain refinement-into the crystallizer for semi-continuous casting and other processes when passing through the launder. Pay attention to control the content of harmful gases such as impurity elements, slag inclusions, hydrogen and oxygen...

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Abstract

The invention discloses an aluminum alloy thick plate for manufacturing a liquefied natural gas carrier storage cabin or a land liquefied natural gas storage tank and a manufacture method of the aluminum alloy thick plate. The aluminum alloy thick plate is used at an environment temperature of room temperature-196DEG C below zero. Aiming at the defects of low temperature brittleness and the like of conventional metal materials, through other special preparation processes of preferably selecting an aluminum alloy grade, controlling chemical components, enhancing the processing of molten aluminum melt, increasing the adding quantity of a grain refiner, annealing a plate ingot, controlling the total deformation of hot rolling, annealing a finished product, carrying out low-temperature deep cooling and the like, the improved aluminum alloy thick plate with excellent room temperature and low-temperature comprehensive mechanical properties and thickness of 25-300mm is obtained.

Description

technical field [0001] The present invention relates to the field of new material processing of non-ferrous metals and the field of ships, and is aimed at an aluminum alloy thick plate (hereinafter referred to as the Unified abbreviation "LNG aluminum thick plate") and its preparation method. Background technique [0002] Non-renewable resources such as oil and natural gas will become more and more precious. With the development of my country's national economy and the continuous advancement of science and technology, my country's dependence on foreign oil and natural gas is getting higher and higher. In 2011, China's dependence on foreign countries exceeded 56%. Energy experts predict that my country's oil dependence on foreign countries will reach 80% in 2030. The transportation mode of natural gas mainly depends on the length of transportation distance. Under normal circumstances, pressurized pipelines are used for short-distance LNG transportation of less than 1,000 km...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/047C22C1/06C22C21/06
Inventor 蒋显全蒋诗琪张秀锦
Owner SOUTHWEST UNIVERSITY
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