Grain-refined extruded aluminum alloy tubular product with large wall thickness and preparation method thereof

A technology of grain refinement and aluminum alloy, which is applied in the field of large-wall extruded aluminum alloy pipes and its preparation, can solve problems such as coarse grains on the surface and large crystal spots, so as to improve purity and reduce impurity elements and alkali Metal, the effect of improving the inner quality

Active Publication Date: 2014-09-17
龙口市丛林铝材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the 6XXX series aluminum alloy large-wall extruded aluminum alloy pipe has coarse grains in the matrix and surface, and has large crystal spots after anodic oxidation. Therefore, it is necessary to invent a large-wall extruded aluminum alloy pipe with fine grain necessary

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The technical problem to be solved by the present invention is to provide a large-wall extruded aluminum alloy pipe material that prevents large crystal spots and fine grains after anodic oxidation.

[0040] A large-wall-thick extruded aluminum alloy pipe with refined grains, which contains the following metal substances in mass percentages:

[0041] Mg: 1.0-1.15%, Si: 0.60-0.75%, Cu: 0.20-0.35%, Fe: ≤0.35%, Mn: ≤0.10%, Cr: 0.05-0.08%, Zn: ≤0.15%, Ti: ≤0.10 %, and the rest is aluminum.

[0042] The large-wall-thick extruded aluminum alloy pipe with refined grains of the present invention contains the following metal substances in mass percentage:

[0043] Mg: 1.1%, Si: 0.65%, Cu: 0.30%, Fe: 0.12%, Mn: 0.02%, Cr: 0.06%, Zn: 0.05%, Ti: 0.04%, and the rest is aluminum.

[0044] A method for preparing a grain-refined large-wall extruded aluminum alloy pipe, which includes the following steps:

[0045] (1) Furnace cleaning before feeding: use a regenerative melting furnac...

Embodiment 2

[0054] A method for preparing a grain-refined large-wall extruded aluminum alloy pipe, comprising the steps of:

[0055] (A) Casting process:

[0056] (1) Incoming material inspection

[0057] Use read-only spectrometer or chemical analysis to test the composition of remelted aluminum ingots (electrolytic aluminum liquid), use read-only spectrometer or chemical analysis, check fracture, internal microstructure, tensile test and other methods for master alloys and additives to enter the factory Inspection, and those that meet the procurement requirements can be put into storage for use.

[0058] (2) Ingredients

[0059] Calculate the feeding amount according to the alloy composition and the charging amount of the smelting furnace: the amount of aluminum ingot (electrolytic aluminum liquid) shall not be less than 40%, and the amount of waste shall not exceed 60%. All raw and auxiliary materials must be clean and dry before feeding, and the workshop workers weigh the materials...

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PUM

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Abstract

The invention discloses a grain-refined extruded aluminum alloy tubular product with large wall thickness and a preparation method thereof. The tubular product comprises the following metallic substances in percentage by weight: 1.0-1.15% of Mg, 0.60-0.75% of Si, 0.20-0.35% of Cu, 0.35% of Fe, 0.10% of Mn, 0.05-0.08% of Cr, 0.15% of Zn, 0.10% of Ti and the balance of aluminum. The invention further discloses a preparation method of the grain-refined extruded aluminum alloy tubular product with large wall thickness. The grain-refined extruded aluminum alloy tubular product with large wall thickness provided by the invention solves the problem that the grains of the base and surface of a 6061 alloy extruded aluminum alloy tubular product with great wall thickness are thick and big, the deficiency of bulky crystal spots generated after anodic oxidation can be eliminated and indexes of the final product, such as inner welding quality and mechanical performance, can satisfy the GB / T6892-2006 standard requirement.

Description

technical field [0001] The invention relates to an aluminum alloy and a preparation method thereof, in particular to a grain-refined large-wall-thick extruded aluminum alloy pipe and a preparation method thereof Background technique [0002] The 6XXX series aluminum alloys use magnesium and silicon as the main alloying elements and Mg 2 The aluminum alloy in which the Si phase is the strengthening phase belongs to the alloy that can be strengthened by heat treatment. The alloy has the advantages of medium strength, high corrosion resistance, no stress corrosion cracking tendency, good welding performance, constant corrosion performance in the welding zone, good formability and process performance, etc. It is widely used in architectural profiles, industrial profiles, large-diameter pipes, etc. field. The aluminum alloy duplicator hub not only needs to ensure long-term, continuous and repeated pressure and heat resistance effects, but also ensures corrosion resistance and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/03C22F1/047B21C37/06
Inventor 张培良宗岩徐群峰吕庆玉
Owner 龙口市丛林铝材有限公司
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