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Aluminum alloy for manufacturing automobile security castings and preparation method thereof

An aluminum alloy and security technology, applied in the field of alloys, can solve problems such as cracking, achieve the effects of improving strength and toughness, improving material mechanical properties, and purifying the structure of molten ingots

Active Publication Date: 2011-05-04
JILIN LIYUAN REFINED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production process of transverse bending of profiles, the phenomenon of cracking of products along extrusion marks is greatly increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 0.95kg of Si, 0.6kg of Mg, 0.42kg of Mn, 0.05kg of Sc, 0.20kg of Cr, 0.03kg of Ti and 0.01kg of B into 97.74kg of industrial pure aluminum for smelting, using the same level of heat The top casting machine casts aluminum alloy long ingots into a homogenizing furnace for homogenization heat treatment at a temperature of 555°C, holding for 12 hours, then enters the cooling furnace to cool to room temperature with strong cold air, cut into short sections and then reheats in the heating furnace The 500℃ aluminum alloy ingot is extruded on the machine, and the discharge port temperature is 525℃. It adopts online water cooling treatment. Through the quenching device, the profile is passed through the water. Before the profile enters the water, the fan is cooled. The quenching temperature of the profile is 510℃ After the water-cooling treatment, the profile is heated to 180°C and kept for 3 hours, then the temperature is lowered to 150°C, kept for 8 hours, and is the product...

Embodiment 2

[0027] Add 1.0kg of Si, 0.58kg of Mg, 0.48kg of Mn, 0.03kg of Sc, 0.1kg of Cr, 0.04kg of Ti and 0.008kg of B into 97.762kg of industrial pure aluminum for smelting, using the same level of heat The top casting machine casts aluminum alloy long ingots into a homogenizing furnace for homogenization heat treatment at a temperature of 558°C, holding for 10 hours, and then enters the cooling furnace to cool to room temperature with strong cold air, cut into short sections and then reheats in the heating furnace The 510℃ aluminum alloy ingot is extruded on the machine, and the outlet temperature is 530℃. It adopts online water cooling treatment. Through the quenching device, the profile is passed through the water. Before the profile enters the water, the fan is cooled, and the quenching temperature of the profile is 505℃ After the water-cooling treatment, the profile is heated to 183°C and kept for 2.5 hours, then the temperature is lowered to 153°C, kept for 7 hours, and is the prod...

Embodiment 3

[0029] Add 1.05kg of Si, 0.55kg of Mg, 0.52kg of Mn, 0.02k of Sc, 0.08kg of Cr, 0.05kg of Ti and 0.005kg of B to 97.725kg of industrial pure aluminum for smelting, using the same level of heat The top casting machine casts aluminum alloy long ingots into a homogenizing furnace for homogenization heat treatment at a temperature of 560°C for 8 hours, and then enters the cooling furnace to cool to room temperature with strong cold air, cut into short sections and reheat in the heating furnace The 520℃ aluminum alloy ingot is extruded on the machine, and the discharge port temperature is 535℃. It adopts online water cooling treatment. Through the quenching device, the profile is passed through the water. Before the profile enters the water, the fan is cooled, and the quenching temperature of the profile is 500℃. After the water-cooling treatment, the profile is heated to 185°C and kept for 2 hours, then the temperature is lowered to 155°C, and kept for 6 hours. After being discharge...

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Abstract

The invention relates to an aluminum alloy for manufacturing automobile security castings and a preparation method thereof. The aluminum alloy is characterized by consisting of 0.95 to 1.05 percent of Si, 0.55 to 0.6 percent of Mg, 0.42 to 0.52 percent of Mn, 0.02 to 0.05 percent of Sc, 0.08 to 0.20 percent of Cr, 0.03 to 0.05 percent of Ti, 0.005 to 0.01 percent of B and the balance of industrial pure aluminum. The preparation method comprises the following steps of: smelting, performing heat treatment, extruding at high temperature, performing online hydrocooling, introducing into a quenching device, heating sections, reducing temperature, discharging from a furnace and cooling. The aluminum alloy has the advantages that: the aluminum alloy has a product optimization formula, the tensile strength of 330-360MPa, the stipulated non-proportional extension strength of 280-310MPa and the elongation of above 12-14 percent, and ensures that products prepared from the aluminum alloy have good strength and impact toughness.

Description

Technical field [0001] The invention relates to an aluminum alloy, especially an aluminum alloy used for manufacturing automobile security parts, and belongs to the field of alloys. [0002] The invention also relates to a preparation method of the aluminum alloy. Background technique [0003] Automobile front and rear bumper assemblies, anti-collision beams, etc. are all automobile security parts. Most of the existing security parts mentioned above are mainly made of aluminum alloy extruded profiles, which are generally made of 6082 alloy. Their shortcomings usually have tensile strength. The non-proportional elongation strength is low and the elongation rate is low, and the mechanical properties of the product cannot be reached. In the production process of the transverse bending of the profile, the product cracks along the extrusion line. Some manufacturers have optimized the alloy on this basis, but the principle has not changed. A well-equipped aluminum profile factory uses ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/02C22F1/043
Inventor 罗颖俊韩宝利
Owner JILIN LIYUAN REFINED
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