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Cast-rolling method for 6xxx series aluminum alloy plate for automobile

An aluminum alloy plate, casting and rolling technology, applied in the field of aluminum alloy casting and rolling, can solve the problems of few production units, complex procedures, low efficiency, etc., and achieve the effects of improving production efficiency, improving heat exchange rate, and reducing penetration

Active Publication Date: 2020-10-13
甘肃东兴嘉宇新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few domestic 6××× aluminum alloy production units, and the efficiency is low. Most of them use semi-continuous casting ingots, and then cold-roll the finished products after hot-rolling. The process is complicated and the cost is high.

Method used

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  • Cast-rolling method for 6xxx series aluminum alloy plate for automobile
  • Cast-rolling method for 6xxx series aluminum alloy plate for automobile
  • Cast-rolling method for 6xxx series aluminum alloy plate for automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Step 1, the smelting furnace is loaded with raw materials and melted;

[0054] Pour the raw materials into the molten aluminum and heat to melt. Stir twice during the melting process. Stir the bottom material in the furnace evenly. The stirring time is 4 minutes each time. Add slagging agent during the second stirring. The raw material is pure aluminum ingots. And electrolytic aluminum liquid, without adding other waste materials, aluminum ingots account for 30%;

[0055] Step 2. Adjust alloy content:

[0056] Sampling the melt obtained in step 1, adding different alloys after detecting the alloy composition, and adjusting the mass ratio of alloy content and composition: Fe0.3%, Mg 0.3%, Si 1.0%, Cu≤0.2%, Zn≤0.2% , Mn0.15%, Ti0.1%, Cr0.10%, and the balance is Al. After the charge is completely melted, when the temperature of the melting furnace rises to 710°C, slag removal and stirring are carried out for 8 minutes, and then the first sampling is carried out. When the...

Embodiment 2

[0063] Step 1, the smelting furnace is loaded with raw materials and melted;

[0064] The raw materials are poured into molten aluminum and then heated and melted. Stir three times during the process of melting the material. Stir the bottom material in the furnace evenly. The stirring time is 6 minutes each time. Add slagging agent during the second stirring. The raw material is pure aluminum ingot And electrolytic aluminum liquid, without adding other waste materials, aluminum ingots account for 45%;

[0065] Step 2. Adjust alloy content:

[0066] Sampling the melt obtained in step 1, adding different alloys after detecting the alloy composition, adjusting the mass ratio of the alloy content to: Fe0.5%, Mg0.8%, Si1.5%, Cu0.2%, Zn0. 2%, Mn0.2%, Ti0.15%, Cr0.10%, and the balance is Al. After the charge is completely melted, when the temperature of the smelting furnace rises to 720°C, carry out slag removal and stirring for 10 minutes, and then take the first sampling , when t...

Embodiment 3

[0073] Step 1, the smelting furnace is loaded with raw materials and melted;

[0074] The raw materials are poured into molten aluminum and then heated and melted. Stir 2-3 times during the process of melting the material. Stir the bottom material in the furnace evenly. The stirring time is 5 minutes each time. Add slagging agent during the second stirring. The raw material is pure Aluminum ingots and electrolytic aluminum liquid, without adding other waste materials, aluminum ingots account for 40%;

[0075] Step 2. Adjust alloy content:

[0076] Sampling the melt obtained in step 1, adding different alloys after detecting the alloy composition, adjusting the mass ratio of the alloy content to: Fe 0.2%, Mg0.35%, Si 1.2%, Mn0.1%, Ti0.08% , Cr0.05%, and the balance is Al. After the charge is completely melted, when the temperature of the smelting furnace rises to 710-720°C, carry out slag removal and stirring for 8-10min, then take the first sampling, and add compounding at th...

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Abstract

The invention discloses a cast-rolling method for a 6xxx series aluminum alloy plate for an automobile. The method comprises the following steps of loading raw materials through a smelting furnace andmelting; adjusting the alloy content; performing electromagnetic stirring, refining, slagging-off, standing and turning down; and performing discharging, online crystal refining, degassing, slag filtering and cast-rolling to obtain a strip; and shearing and coiling the strip to form a cast-rolled blank. The cast-rolled blank processed by the method has good mechanical properties, wherein the strip hardness is 60 to 90 HV, the tensile strength is 150 to 200 MPa, the yield strength is 120 to 160 MPa, the elongation after fracture is 20% to 30%, a product can be bent at 90 degrees and has no crack, and the requirements for next production are met.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy casting and rolling, in particular to a casting and rolling method of 6××× series aluminum alloy plates for automobiles. Background technique [0002] The production of cold-rolled strip by twin-roller casting-rolling machine has the advantages of short process, low investment, energy saving and environmental protection, etc., but the production efficiency of conventional aluminum strip casting and rolling process is low, the types of alloys that can be cast and rolled are limited, and the internal structure of cast-rolled slab And the mechanical properties are far lower than those produced by traditional hot-rolled slabs. For the production of high-alloy products with high deep-drawing properties, especially the production of automotive sheet blanks, and for the large improvement in casting and rolling production efficiency, it is still It is a difficult problem in the development of a new...

Claims

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Application Information

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IPC IPC(8): B22D11/06B22D11/07B22D11/117C22C21/02
CPCB22D11/0651B22D11/0622B22D11/003B22D11/07B22D11/117C22C21/02
Inventor 张宏强李少东周耀邦张开宝
Owner 甘肃东兴嘉宇新材料有限公司
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