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Technology for producing aluminum alloy section bar for ships

A technology for aluminum alloy profiles and ships, applied in the field of aluminum alloy manufacturing, can solve the problems that the performance cannot meet the use requirements, the heat treatment process is complicated, and the extrusion difficulty is difficult, and the dimensional tolerance is small, the product surface quality is high, and the physical and chemical properties are excellent. Effect

Active Publication Date: 2014-02-19
CHINA ZHONGWANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the special composition, the extrusion of this alloy profile is difficult and the heat treatment process is complicated; the conventional production process often has a low yield and the performance cannot meet the use requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The process of producing aluminum alloy profiles for ships in this embodiment includes the steps of composition optimization, casting billet, extrusion molding, quenching, stretching and straightening, and aging treatment steps. After composition optimization, the composition and mass ratio of the aluminum alloy are as follows: Si : 0.27%, Fe: 0.20%, Cu: 0.02%, Mn: 0.33%, Mg: 1.35%, Cr: 0.06%, Zn: 0.09%, Ti: 0.11%, Al: balance; the extrusion molding step The medium extrusion speed is 1.3m / min, the casting rod temperature is 545°C during extrusion molding, the mold temperature is 435°C, and the extrusion cylinder temperature is 475°C.

[0016] As an improvement of this embodiment, the profile obtained in the extrusion molding step is quenched immediately after being released from the mold, and the quenching medium is high-pressure water mist.

[0017] As an improvement of this embodiment, the stretching ratio in the stretching and straightening step is 2.7%.

[0018] As...

Embodiment 2

[0020] The process of producing aluminum alloy profiles for ships in this embodiment includes the steps of composition optimization, casting billet, extrusion molding, quenching, stretching and straightening, and aging treatment steps. After composition optimization, the composition and mass ratio of the aluminum alloy are as follows: Si : 0.37%, Fe: 0.16%, Cu: 0.04%, Mn: 0.22%, Mg: 1.65%, Cr: 0.04%, Zn: 0.11%, Ti: 0.09%, Al: balance; the extrusion molding step The medium extrusion speed is 2.2m / min, the casting rod temperature is 515°C during extrusion molding, the mold temperature is 465°C, and the extrusion cylinder temperature is 445°C.

[0021] As an improvement of this embodiment, the profile obtained in the extrusion molding step is quenched after being released from the mold, and the quenching medium is high-pressure water mist to ensure the performance and opening size of the profile.

[0022] As an improvement of this embodiment, the stretching ratio in the stretchin...

Embodiment 3

[0025] The process of producing aluminum alloy profiles for ships in this embodiment includes the steps of composition optimization, casting billet, extrusion molding, quenching, stretching and straightening, and aging treatment steps. After composition optimization, the composition and mass ratio of the aluminum alloy are as follows: Si : 0.3%, Fe: 0.18%, Cu: 0.03%, Mn: 0.26%, Mg: 1.45%, Cr: 0.05%, Zn: 0.09%, Ti: 0.11%, Al: balance; the extrusion molding step The medium extrusion speed is 1.7m / min, the casting rod temperature is 528°C during extrusion molding, the mold temperature is 455°C, and the extrusion cylinder temperature is 465°C.

[0026] As an improvement of this embodiment, the profile obtained in the extrusion molding step is quenched immediately after being released from the mold, and the quenching medium is high-pressure water mist.

[0027] As an improvement of this embodiment, the stretching ratio in the stretching and straightening step is 1.9%.

[0028] As ...

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Abstract

The invention discloses a technology for producing an aluminum alloy section bar for ships. The technology orderly comprises component optimization, pouring blank-making, extrusion molding, quenching, stretching straightening and aging treatment. The optimal aluminum alloy comprises, by mass, 0.27-0.37% of Si, 0.16-0.20% of Fe, 0.02-0.04% of Cu, 0.22-0.33% of Mn, 1.35-1.65% of Mg, 0.04-0.06% of Cr, 0.09-0.11% of Zn, 0.09-0.11% of Ti and the balance Al. In the extrusion molding, an extrusion rate is in a range of 1.3-2.2m / min, a bar casting temperature is in a range of 515-545 DEG C, a mold temperature is in a range of 450+ / -15 DEG C and an extrusion cylinder temperature is in a range of 460+ / -15 DEG C. The aluminum alloy section bar obtained by the technology has excellent physical and chemical performances, small dimensional tolerance and high product surface quality.

Description

technical field [0001] The invention belongs to the field of aluminum alloy manufacturing, and relates to a process for producing aluminum alloy profiles, in particular to a process for producing aluminum alloy profiles for ships. Background technique [0002] Aluminum alloy has the advantages of light weight, high strength, good wear resistance, and not easily deformed after processing. It is widely used in automobiles, aerospace, shipping and other fields. 5050 aluminum alloy has medium strength and good formability, and is widely used in the field of shipbuilding. However, due to the special composition, the extrusion of this alloy profile is difficult and the heat treatment process is complicated; the conventional production process often has a low yield and its performance cannot meet the use requirements. [0003] Therefore, it is necessary to develop a new process for producing aluminum alloy profiles for ships. The aluminum alloy profiles produced by this process ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22F1/047B23P15/00
Inventor 李延军王笠玮冯小东卢百鹏王裕峰赵启平
Owner CHINA ZHONGWANG
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