Preparation method of large-diameter 6061 aluminum alloy extruded pipe for hydrogen storage of new energy automobile

A new energy vehicle and aluminum alloy technology, which is applied in the field of aluminum alloy profile processing, can solve the problems such as the inability to meet the technical requirements of lightweight and high hydrogen storage density of new energy vehicles.

Pending Publication Date: 2022-07-29
西北铝业有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional steel pressure vessels cannot meet the technical requirements of lightweight and high hydrogen storage density for new energy vehicles

Method used

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  • Preparation method of large-diameter 6061 aluminum alloy extruded pipe for hydrogen storage of new energy automobile
  • Preparation method of large-diameter 6061 aluminum alloy extruded pipe for hydrogen storage of new energy automobile
  • Preparation method of large-diameter 6061 aluminum alloy extruded pipe for hydrogen storage of new energy automobile

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Experimental program
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Effect test

Embodiment 1

[0033] A preparation method of large-diameter 6061 aluminum alloy extruded pipe for large-diameter new energy vehicles, the state and specifications of the product are shown in Table 1,

[0034]

[0035] Including the following process flow:

[0036] (1) Alloy composition optimization: optimize the Mg / Si ratio and the ratio of other alloying elements in 6061 aluminum alloy, and control the content of impurity elements, in terms of weight percentage, among which: Si0.65%, Fe0.18%, Cu0.3 %, Mn0.15%, Mg0.86%, Zn0.18%, Ti0.14%, Cr0.17%, Ni0.05%, the balance is Al, the content of Pb and Bi≤0.003%;

[0037] (2) Smelting: Select high-purity ingots of various other alloying elements, metal additives and intermediate alloys, and then put them into an electric furnace with a furnace temperature of 900 °C, the melting temperature is 725 °C, and the temperature to be smelted to 730 °C When slag removal, magnesium ingots and various additives are added, the magnesium ingots must be add...

Embodiment 2

[0049] A preparation method of large-diameter 6061 aluminum alloy extruded pipe for large-diameter new energy vehicles, the state and specifications of the product are shown in Table 3:

[0050]

[0051] Including the following process flow:

[0052] (1) Alloy composition optimization: optimize the Mg / Si ratio and the ratio of other alloying elements in 6061 aluminum alloy, and control the content of impurity elements, in terms of weight percentage, among which: Si0.60%, Fe0.16%, Cu0.3 %, Mn0.17%, Mg0.90%, Zn0.20%, Ti0.15%, Cr0.18%, Ni0.05%, the content of Pb and Bi is ≤0.003, and the balance is Al;

[0053] (2) Smelting: Select high-purity ingots of various other alloying elements, metal additives and intermediate alloys, and then put them into an electric furnace with a furnace temperature of 900 °C, the melting temperature is 735 °C, and the temperature to be smelted to 730 °C When slag removal, magnesium ingots and various additives are added, the magnesium ingots must...

Embodiment 3

[0065] A preparation method of large-diameter 6061 aluminum alloy extruded pipe for large-diameter new energy vehicles, the state and specifications of the product are shown in Table 5:

[0066]

[0067] Including the following process flow:

[0068] (1) Alloy composition optimization: optimize the Mg / Si ratio and the ratio of other alloying elements in 6061 aluminum alloy, and control the content of impurity elements, in terms of weight percentage, among which: Si0.69%, Fe0.19%, Cu0.35 %, Mn0.20%, Mg0.90%, Zn0.25%, Ti0.15%, Cr0.18%, Ni0.05%, the content of Pb and Bi is ≤0.003, and the balance is Al;

[0069] (2) Smelting: Select high-purity ingots of various other added alloying elements, metal additives and intermediate alloys, and then put them into an electric furnace with a furnace temperature of 890 °C, the melting temperature is 735 °C, and the temperature to be smelted to 730 °C When slag removal, magnesium ingots and various additives are added, the magnesium ingo...

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Abstract

The invention discloses a preparation method of a large-diameter 6061 aluminum alloy extruded pipe for a new energy automobile. The preparation method sequentially comprises the working procedures of alloy component optimization, smelting, melt purification, standing, degassing and deslagging, casting, homogenizing annealing, machining and extrusion. The alloy comprises the following elements in percentage by weight: 0.6%-0.70% of Si, 0.15%-0.20% of Fe, 0.28%-0.35% of Cu, 0.15%-0.20% of Mn, 0.85%-1.1% of Mg, 0.18%-0.25% of Zn, 0.14%-0.15% of Ti, 0.1%-0.3% of Cr, 0.05% of Ni and the balance of Al, the ratio of Mg to Si is adjusted to be 1.40%-1.53, and a heat treatment process of a cast ingot is optimized. Meanwhile, in order to ensure that the pipe meets the precision requirement and the surface quality requirement, a tool, a mold and extrusion parameters are designed, the aluminum alloy extruded pipe with good plasticity, toughness and rigidity, uniform component distribution and fine crystal grains is obtained, and therefore the use requirement of a hydrogen storage pipe of a new energy automobile is met.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy profile processing, and in particular relates to a preparation method of a large-diameter 6061 aluminum alloy extruded pipe for new energy vehicles. Background technique [0002] In recent years, the number of new energy vehicles in my country has continued to increase. Hydrogen has become the preferred gas for new energy vehicles due to its abundant resources, high calorific value, and cleanliness. Its application prospects are limitless. There are two types of hydrogen energy vehicles, hydrogen internal combustion engine vehicles and hydrogen fuel cell vehicles. No matter which type of hydrogen energy vehicle it is, the first thing to do is to solve the problem of hydrogen storage. Conventional steel pressure vessels cannot meet the technical requirements of lightweight and high hydrogen storage density for new energy vehicles. [0003] 6061 aluminum alloy uses Mg and Si as the main allo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C21/08C22B9/05C22B21/06B22D11/00C22F1/047B21C23/08B21C37/06
CPCC22C1/026C22C1/03C22C21/08B22D11/003C22B9/055C22B21/066C22F1/047B21C37/06B21C23/085
Inventor 章伟张文斌周霞林茂李维忠赵刚王守业张秋锦杨凤琦刘旭云马步云黄嵘魏新民赵锦辉
Owner 西北铝业有限责任公司
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