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Al-Mg-Si-Cu alloy and preparation method thereof

A technology of copper alloy and Al-Mg-Si, which is applied in the field of industrial profile Al-Mg-Si-Cu alloy and its preparation, can solve the problems of large flow stress, difficulty in mass production of small and medium-sized enterprises, and low extrusion speed of industrial profiles. problem, to achieve the effect of increasing the extrusion speed and reducing the cost

Inactive Publication Date: 2009-12-09
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, with the development of urban light rail, subway and automobile lightweight, the demand for industrial profiles is increasing; in addition, the current domestic production equipment for industrial profiles is mainly 100MT ultra-large extruders, which are not suitable for Many small-area profiles are produced. For small and medium-sized enterprises, since the extruders for the production of building profiles generally do not have an online water quenching device, the commonly used 6000 series industrial profiles 6061, 6005 and 6082 alloys generally require water quenching to meet performance requirements; Moreover, due to excessive rheological stress in the extrusion process of industrial profiles, the extrusion speed of industrial profiles is much lower than that of architectural profiles, so it is difficult to achieve mass production in small and medium-sized enterprises

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A) Alloy preparation

[0018] Mix 0.6% Mg, 0.45% Si, 0.5% Cu, 0.2% Mn, 0.1% Cr, 0.1% Zn, 0.02% Ti, control Fe content not more than 0.3% and the balance of pure aluminum in the crucible resistance Smelt in the furnace, fully stir, and cast into ingots of φ95×300mm. After fully cooling, samples are taken and analyzed by DTA to analyze the alloy solid-liquid temperature. The homogenization annealing is carried out in a box furnace. The homogenization temperature is 560℃ and the time is 8h.

[0019] B) Hot extrusion

[0020] After the ingot is homogenized and annealed, the surface is machined into a φ88×300m round rod, and then it is processed into a profile of a specific size using a GB ZM1HC001 mold.

[0021] C) Heat treatment

[0022] The extruded samples were subjected to online air quenching treatment at a quenching temperature of 500°C, followed by artificial aging after a delay of 3 hours. The aging temperature was 200°C and the aging time was 3 hours. After aging, it w...

Embodiment 2

[0026] A) Alloy preparation

[0027] Mix 0.4% Mg, 0.6% Si, 0.7% Cu, 0.2% Mn, 0.1% Cr, 0.3% Zn, 0.02% Ti, control Fe content not more than 0.3%, and the balance of pure aluminum in the crucible Smelt in a resistance furnace, fully stir, and cast into ingots of φ95×300mm. After fully cooling, samples are taken and analyzed by DTA to analyze the alloy solid-liquid temperature, and homogenized annealing is carried out in a box furnace. The homogenization temperature is 560℃ and the time is 8h. .

[0028] B) Hot extrusion

[0029] After the ingot is homogenized and annealed, the surface is machined into a φ88×300m round rod, and then it is processed into a profile of a specific size using a GB ZM1HC001 mold.

[0030] C) Heat treatment

[0031] The extruded sample is subjected to online air quenching treatment at a quenching temperature of 500°C, artificial aging is carried out without delay, the aging temperature is 200°C, the aging time is 3 hours, and the aging is cooled with water. ...

Embodiment 3

[0035] A) Alloy preparation

[0036] Mix 0.4% Mg, 0.6% Si, 0.3% Cu, 0.2% Mn, 0.1% Cr, 0.7% Zn, 0.02% Ti, Fe content not more than 0.3%, and the balance of pure aluminum in the crucible resistance Smelt in the furnace, fully stir, and cast into ingots of φ95×300mm. After fully cooling, samples are taken and analyzed by DTA to analyze the alloy solid-liquid temperature. The homogenization annealing is carried out in a box furnace. The homogenization temperature is 560℃ and the time is 8h.

[0037] B) Hot extrusion

[0038] After the ingot is homogenized and annealed, the surface is machined into a φ88×300m round rod, and then it is processed into a profile of a specific size using a GB ZM1HC001 mold.

[0039] C) Heat treatment

[0040] The extruded sample is subjected to online air quenching treatment at a quenching temperature of 500°C, artificial aging is carried out without delay, the aging temperature is 200°C, the aging time is 3 hours, and the aging is cooled with water.

[00...

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Abstract

The invention discloses Al-Mg-Si-Cu alloy and a preparation method thereof. The alloy consists of the following components in percentage by mass: 0.4 to 0.6 percent of Mg, 0.45 to 0.6 percent of Si, 0.3 to 0.8 percent of Cu, 0.1 to 0.2 percent of Mn, 0.1 to 0.7 percent of Zn, 0 to 0.1 percent of Cr, 0.01 to 0.02 percent of Ti, not more than 0.3 percent of Fe, not more than 0.1 percent of other impurities (total content), and the balance of Al. The alloy has the characteristics of the reduction of deformation resistance, improves extrusion speed and production efficiency, and can improve the yield under the condition of constant productivity. In addition, the alloy does not need an extra water quenching process, and can reduce investment cost of equipment by on-line air quenching after hot extrusion.

Description

Technical field: [0001] The invention relates to an Al-Mg-Si-Cu alloy used for industrial profiles and a preparation method. Background technique: [0002] Aluminum alloy has the characteristics of high strength, high toughness, lightweight structure, corrosion resistance, processability, and easy return. These performance characteristics are the most promising metal materials pursued by modern society. It is widely used in civil and military fields such as transportation, building materials, aviation, aerospace, etc., and plays an irreplaceable important role in the national economy and national defense construction. On the one hand, with the development of urban light rail, subway and automobile lightweight, the demand for industrial profiles is increasing; in addition, the current domestic production of industrial profile equipment is mainly based on 100MT ultra-large extruders, which is not suitable Many small-area profiles are produced. For small and medium-sized enterprises...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C21/08C22C21/10C22C21/18C22C1/02C22F1/043C22F1/047C22F1/053C22F1/057C21D1/26
Inventor 杨伏良尹德艳熊落保李文意张国鹏马政党小荔
Owner CENT SOUTH UNIV
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