Staged uniform extrusion forming method of hollow thin-walled aluminum alloy tubular profile

A tubular profile and extrusion molding technology, applied in the field of metal materials, can solve problems such as unsatisfactory application process, tube wall thickness, and large size of dispersed phase precipitation, etc., to achieve efficient and orderly operation process, high tensile strength, and high-quality finished products high effect

Inactive Publication Date: 2019-04-16
苏州市智永亿精密五金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. At present, the non-equilibrium eutectic phase in the microstructure of aluminum alloy treated by single-stage homogenization thermal process is not sufficient, and the size of the dispersed phase precipitation is relatively coarse
Research on double-stage or multi-stage homogenization heat treatment methods has been carried out at home and abroad, but the application process is not satisfactory
[0007] 2. At present, the homogenization heat treatment technology has a strong pertinence, which cannot be applied to aluminum alloys of different product grades, and is often limited in the actual production process
[0008] 3. At present, the cooling method and heating method used in the homogenization heat treatment technology are relatively simple, which makes the working environment more limited and the application scope is also narrowed accordingly.
[0009] 4. The tube wall of the finished product in the current homogenization heat treatment technology is relatively thick, and it cannot be produced for aluminum alloy tubular equipment with a thin tube wall

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] In this embodiment, the 1060 aluminum alloy with a diameter of 30cm is the operation object, then there are:

[0062] The alloy ingot rough slab includes the following components in mass percentage:

[0063] Zn 0.05%;

[0064] Mg 0.05%;

[0065] Cu 0.05%;

[0066] Si 0.25%;

[0067] Mn 0.05%;

[0068] Fe 0.4%;

[0069] Ti 0.03%;

[0070] V 0.05%;

[0071] The remainder is Al.

[0072] Furthermore, a method for hierarchically homogenized extrusion molding of hollow thin-walled aluminum alloy tubular profiles is characterized in that it includes three-stage uniform processing, wherein:

[0073] ① The first level of homogenization: put the ingot rough billet of a hollow thin-walled aluminum alloy tubular equipment obtained by semi-continuous casting into a heating furnace and heat it to 390 °C at a speed of 15 °C / min, perform homogenization and extrusion, and then keep it warm 15 hours;

[0074] ② Primary cooling: Cool the rough embryos after the first homogeniza...

Embodiment 2

[0080] In this embodiment, the 3003 aluminum alloy with a diameter of 20cm is the object of operation, then:

[0081] The alloy ingot rough slab includes the following components in mass percentage:

[0082] Zn 0.1%;

[0083] Cu 0.1%;

[0084] Si 0.6%;

[0085] Mn 1.25%;

[0086] Fe 0.7%;

[0087] The remainder is Al.

[0088] Furthermore, a method for hierarchically homogenized extrusion molding of hollow thin-walled aluminum alloy tubular profiles is characterized in that it includes three-stage uniform processing, wherein:

[0089] ① The first level of homogenization: put the ingot rough billet of a hollow thin-walled aluminum alloy tubular equipment obtained by semi-continuous casting into a heating furnace and heat it to 460 °C at a speed of 12 °C / min, perform homogenization and extrusion, and then keep it warm 10 hours;

[0090] ② Primary cooling: Cool the rough embryos after the first homogenization treatment to 220°C and then cool to room temperature;

[0091] ...

Embodiment 3

[0096] In this embodiment, the 4043 aluminum alloy with a diameter of 40cm is the object of operation, then:

[0097] The alloy ingot rough slab includes the following components in mass percentage:

[0098] Zn 0.01%;

[0099] Mg 0.05%;

[0100] Cu 0.03%;

[0101] Si 5%;

[0102] Mn 0.05%;

[0103] Fe 0.08%;

[0104] Zr 0.01%;

[0105] Ti 0.02%;

[0106] V 0.05%;

[0107] The remainder is Al.

[0108] Furthermore, a method for hierarchically homogenized extrusion molding of hollow thin-walled aluminum alloy tubular profiles is characterized in that it includes three-stage uniform processing, wherein:

[0109] ① The first level of homogenization: Put the ingot rough billet of a hollow thin-walled aluminum alloy tubular equipment obtained by semi-continuous casting into the heating furnace and heat it to 380 °C at a speed of 20 °C / min, perform homogenization and extrusion, and then keep it warm 20 hours;

[0110] ② Primary cooling: Cool the rough embryos after the fir...

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Abstract

The invention discloses a staged uniform extrusion forming method of a hollow thin-walled aluminum alloy tubular profile. The staged uniform extrusion forming method comprises the steps that three-stage uniform treatment is conducted, specifically, a hollow thin-walled aluminum alloy tubular device ingot rough blank obtained through semicontinuous casting is placed in a furnace to be heated to P DEG C at the speed of 12-20 DEG C / min, uniformly extruded and then subjected to heat preservation for A minutes; then the rough blank subjected to uniformization treatment is cooled to 220-270 DEG C and then cooled to the room temperature; then the cooled and air-cooled rough blank is placed in the furnace to be heated to Q DEG C at the speed of 20-25 DEG C / min, uniformly extruded and then subjected to heat preservation for B minutes; the rough blank subjected to second-time uniformization treatment is cooled to 300-350 DEG C and then cooled to the room temperature; the rough blank secondarilycooled and air-cooled is placed into the furnace to be heated to L DEG C at the speed of 24-30 DEG C / min, uniformly extruded and then subjected to heat preservation for C minutes; and finally, the rough blank subjected to third-time uniformization treatment is cooled to the room temperature, and thus a finished product is obtained.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a graded and homogenized extrusion molding method for hollow thin-walled aluminum alloy tubular profiles. Background technique [0002] Aluminum alloy is an alloy based on aluminum, the main alloying elements are copper, silicon, magnesium, zinc and manganese. Aluminum alloy is the most widely used non-ferrous metal structural material in industry. With the rapid development of the economy, aluminum alloy materials have been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industries, especially in recent years, with the global economic integration, the rapid development of logistics and transportation, and logistics and transportation have driven the vigorous development of the transportation industry, and the application of aluminum and aluminum alloy materials in the transportation equipment manufacturing i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04C22F1/043C22F1/047
CPCC22F1/04C22F1/043C22F1/047
Inventor 王化龙
Owner 苏州市智永亿精密五金有限公司
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