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A high-strength heat-resistant aluminum tube and its preparation method

A heat-resistant aluminum, high-strength technology, used in the field of aluminum tubes, can solve the problems of insufficient high strength and durability, and hardness that cannot meet practical applications, and achieve the effect of enhancing tensile strength and ductility.

Active Publication Date: 2018-04-24
宁国市华骏铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the high-strength heat-resistant aluminum alloys reported publicly generally have insufficient high strength and durability, and the hardness cannot meet the needs of practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A high-strength heat-resistant aluminum tube proposed by the present invention, its components include by weight percentage: Cu: 0.5%, Mn: 0.4%, Li: 0.04%, Ti: 1%, Zr: 0.4%, Be: 0.6% , Mg: 0.1%, Ni: 0.12%, Sn: 0.01%, In: 0.25%, Sb: 0.05%, Cd: 0.3%, Cr: 0.2%, Y: 0.05%, B: 0.05%, Si: 0.3% , the balance being Al.

[0028] The preparation method of the above-mentioned high-strength heat-resistant aluminum pipe proposed by the present invention includes the following steps: smelting and casting, hot extrusion, finishing, solution treatment, and aging treatment.

[0029] In the hot extrusion step, the extrusion temperature was 380°C.

[0030] In the solid solution treatment step, the temperature was raised to 320°C, kept for 40 minutes, then raised to 400°C, kept for 25 minutes, then raised to 460°C, kept for 2 hours, and cooled with water.

[0031] In the aging treatment step, natural aging is 150 minutes, followed by artificial aging for 120 minutes, and the artificial ag...

Embodiment 2

[0033] A high-strength heat-resistant aluminum tube proposed by the present invention, its components include by weight percentage: Cu: 0.9%, Mn: 0.1%, Li: 0.08%, Ti: 0.6%, Zr: 0.8%, Be: 0.3% , Mg: 0.2%, Ni: 0.08%, Sn: 0.05%, In: 0.15%, Sb: 0.08%, Cd: 0.1%, Cr: 0.5%, Y: 0.02%, B: 0.1%, Si: 0.1% , the balance being Al.

[0034] The preparation method of the above-mentioned high-strength heat-resistant aluminum tube proposed by the present invention includes the following steps: smelting and casting, hot extrusion, finishing, solution treatment, and aging treatment.

[0035] In the hot extrusion step, the extrusion temperature was 400°C.

[0036] In the solid solution treatment step, the temperature was raised to 300°C, kept for 50 minutes, then raised to 380°C, kept for 30 minutes, then raised to 450°C, kept for 3 hours, and cooled with water.

[0037] In the aging treatment step, natural aging is 90 minutes, followed by artificial aging for 200 minutes, and the artificial ag...

Embodiment 3

[0039]A high-strength heat-resistant aluminum tube proposed by the present invention, its components include by weight percentage: Cu: 0.6%, Mn: 0.3%, Li: 0.05%, Ti: 0.9%, Zr: 0.5%, Be: 0.5% , Mg: 0.12%, Ni: 0.11%, Sn: 0.02%, In: 0.22%, Sb: 0.06%, Cd: 0.25%, Cr: 0.3%, Y: 0.04%, B: 0.079%, Si: 0.25% , the balance being Al.

[0040] The preparation method of the above-mentioned high-strength heat-resistant aluminum pipe proposed by the present invention includes the following steps: smelting and casting, hot extrusion, finishing, solution treatment, and aging treatment.

[0041] In the hot extrusion step, the extrusion temperature was 385°C.

[0042] In the solid solution treatment step, the temperature was raised to 315°C, kept for 42 minutes, then raised to 395°C, kept for 26 minutes, then raised to 458°C, kept for 2.2 hours, and cooled with water.

[0043] In the aging treatment step, natural aging is 130 minutes, followed by artificial aging for 140 minutes, and the artifi...

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Abstract

The invention discloses a high-strength heat-resisting aluminum pipe which comprises, by weight, 0.5-0.9% of Cu, 0.1-0.4% of Mn, 0.04-0.08% of Li, 0.6-1% of Ti, 0.4-0.8% of Zr, 0.3-0.6% of Be, 0.1-0.2% of Mg, 0.08-0.12% of Ni, 0.01-0.05% of Sn, 0.15-0.25% of In, 0.05-0.08% of Sb, 0.1-0.3% of Cd, 0.2-0.5% of Cr, 0.02-0.05% of Y, 0.05-0.1% of B, 0.1-0.3% of Si and the balance Al. The invention further discloses a manufacturing method of the high-strength heat resisting aluminum pipe. The manufacturing method includes the following steps of melting casting, hot extruding, finishing, solution treatment and aging treatment.

Description

technical field [0001] The invention relates to the technical field of aluminum tubes, in particular to a high-strength heat-resistant aluminum tube and a preparation method thereof. Background technique [0002] The density of pure aluminum is small (ρ=2.7g / cm 3 ), low melting point, face-centered cubic structure, high plasticity, easy processing, and can be made into various profiles and plates. Aluminum has good corrosion resistance; however, the strength of pure aluminum is very low, so it is not suitable for structural materials. Through long-term production practice and scientific experiments, people have gradually strengthened aluminum by adding alloying elements and using heat treatment, which resulted in a series of aluminum alloys. The aluminum alloy formed by adding certain elements can also have high strength while maintaining the advantages of pure aluminum such as light weight, and the σb value can reach 24-60kgf / mm respectively 2 . In this way, the "specif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/16C22C21/14C22C1/02
CPCC22C1/026C22C21/14C22C21/16
Inventor 朱家亮李有平
Owner 宁国市华骏铝业有限公司