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Alloy for casting space shuttle liquid hydrogen fuel tank

A space shuttle and fuel tank technology, applied in the field of alloys, can solve the problems of limiting the carrying capacity of the space shuttle and reducing the storage capacity of the fuel tank of the space shuttle, and achieve the effects of improving mechanical properties, ensuring low temperature resistance, and good construction technology

Inactive Publication Date: 2017-11-28
NANJING LVZHICHENG PATENT TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, since the boiling point of liquid hydrogen is 20.35 K, and the boiling point of liquid oxygen is 90.188 K, in the fuel tank design of the space shuttle, the liquid hydrogen fuel tank and the liquid oxygen fuel tank must be completely separated, and a long distance must be separated between them. In order to prevent liquid hydrogen from freezing liquid oxygen, this greatly reduces the storage capacity of the fuel tank of the space shuttle and limits the carrying capacity of the space shuttle to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] An alloy for casting a liquid hydrogen fuel tank of a space shuttle is made of the following raw materials in parts by weight: 85 parts of Al, 3.0 parts of Li, 2.0 parts of Cu, 0.25 parts of Zr, and 0.1 part of Sr.

[0030]A kind of described production process for casting the alloy of space shuttle liquid hydrogen fuel tank, concrete steps are:

[0031] (1) Take the aluminum ingot with the brand name Al99.85 and place it in the electron beam melting furnace body, adjust the vacuum degree in the electron beam melting furnace body to 0.04Pa, and increase the beam current to 150mA at the speed of 1mA / s in the electron gun body to make it Bombard the aluminum ingot for remelting until it is completely melted, and control the temperature of the molten aluminum to 715°C;

[0032] (2) Then add Al-10wt%Cu master alloy, Al-3wt%Zr master alloy, Al-0.8wt%Sr master alloy to the molten aluminum, and increase the electron gun beam current from 150mA to 200mA at a speed of 1mA / s, Ad...

Embodiment 2

[0041] An alloy used for casting liquid hydrogen fuel tanks of space shuttles is made of the following raw materials in parts by weight: 90 parts of Al, 2.0 parts of Li, 3.0 parts of Cu, 0.1 parts of Zr, and 0.2 parts of Sr.

[0042] A kind of described production process for casting the alloy of space shuttle liquid hydrogen fuel tank, concrete steps are:

[0043] (1) Place the aluminum ingot for remelting with the brand name Al99.85 in the electron beam melting furnace body, adjust the vacuum degree in the electron beam melting furnace body to 0.05Pa, and increase the beam current of the electron gun body to 150mA at a speed of 1mA / s, so that Bombard the aluminum ingot for remelting until it is completely melted, and control the temperature of the molten aluminum to 700°C;

[0044] (2) Then add Al-20wt%Cu master alloy, Al-0.5wt%Zr master alloy, Al-2wt%Sr master alloy to the molten aluminum, and increase the electron gun beam current from 150mA to 200mA at a speed of 1mA / s, ...

Embodiment 3

[0053] An alloy used for casting liquid hydrogen fuel tanks of space shuttles is made of the following raw materials in parts by weight: 87 parts of Al, 2.5 parts of Li, 2.4 parts of Cu, 0.21 parts of Zr, and 0.15 parts of Sr.

[0054] A kind of described production process for casting the alloy of space shuttle liquid hydrogen fuel tank, concrete steps are:

[0055] (1) Place the aluminum ingot for remelting with the brand name Al99.85 in the electron beam melting furnace body, adjust the vacuum degree in the electron beam melting furnace body to 0.045Pa, and increase the beam current to 150mA in the electron gun body at a speed of 1mA / s to make it Bombard the aluminum ingot for remelting until it is completely melted, and control the temperature of the molten aluminum to 710°C;

[0056] (2) Then add Al-14wt%Cu master alloy, Al-2.2wt%Zr master alloy, Al-1.2wt%Sr master alloy to the molten aluminum, and increase the beam current of the electron gun from 150mA to 200mA at a spe...

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Abstract

The invention discloses alloy for casting a space shuttle liquid hydrogen fuel tank. The alloy is prepared from the following raw materials in parts by weight: 85-90 parts of Al, 2.0-3.0 parts of Li, 2.0-3.0 parts of Cu, 0.1-0.25 parts of Zr and 0.1-0.2 parts of Sr. The alloy has the advantages as follows: with adoption of electron beams for smelting the alloy, harmful impurity elements such as O, N, S and the like can be greatly reduced in the alloy smelting process, purity and content of Al, Ni and Cu in the alloy are increased, low temperature resistance of the alloy is guaranteed, and as the temperature decreases, strength, ductility and toughness of the alloy are greatly improved; the aluminum ingot with the grade of Al99.85 is used as a raw material, purity of Al in the alloy is further improved; an ultra-low-temperature-resistant pressure-sensitive adhesive is solvent-free, the curing temperature is low, curing time is short, the ultra-low-temperature-resistant pressure-sensitive adhesive is used for bonding flexible foam plastic and a pipe rapidly, the on-site construction process is good, the ultra-low-temperature-resistant pressure-sensitive adhesive still realizes a better adhesion effect under the condition of ultra-low temperature; and transmission of low temperature can be better insulated by the soft foam plastic layer.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to an alloy used for casting liquid hydrogen fuel tanks of space shuttles. Background technique [0002] Liquid hydrogen is a high-energy, low-temperature liquid fuel. It is a colorless, odorless, transparent low-temperature liquid with a boiling point of 20.35K, a freezing point of 13.55K, and a density of 0.07 g / cm3. The bicomponent low-temperature liquid propellant composed of liquid hydrogen and liquid oxygen has extremely high energy, and has been widely used in launch vehicles such as communication satellites, spacecraft and space shuttles. [0003] Among them, since the density of liquid hydrogen is 0.07 g / cm3, in comparison, the density of liquid hydrogen is less than one tenth of kerosene and unsymmetrical dimethylhydrazine. This brings about a huge problem that the space shuttle needs a huge Fuel tanks to store liquid hydrogen. At the same time, since the boiling point of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/12C22C21/00C22C1/03C22B9/22C22F1/04C22F1/057B64D37/30
CPCB64D37/30C22B9/228C22C1/026C22C1/03C22C21/00C22C21/12C22F1/04C22F1/057Y02T90/40
Inventor 张桂芳
Owner NANJING LVZHICHENG PATENT TECH DEV CO LTD
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