A kind of 7000 series alloy material for automobile bumper and its production method

A technology for automobile bumpers and alloy materials, which is applied to 7000 series alloy materials for automobile bumpers and its production field, which can solve the problems of reducing the welding performance of alloys, achieve the effects of reducing welding cracks, broad application prospects, and good surface quality

Active Publication Date: 2019-11-19
温州市赢创新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When people develop 7xxx series aluminum alloys, they encounter the bottleneck that increasing the strength of the alloy will inevitably reduce the welding performance of the alloy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A 7000-series alloy material for automobile bumpers, characterized in that: the alloy composition of the aluminum alloy is calculated by mass fraction: the alloy composition of the aluminum alloy is calculated by mass fraction as Zn: 8.8, Mg: 1.5, Cu: 0.7, Zr: 0.6, Ti: 0.4, Sn: 0.1, Mn: 0.2, Ag: 0.03, Co: 0.01, Sc: 0.01, Yb: 0.01, B: 0.001, Cr: 0.002, the balance is aluminum and unavoidable impurities, and make The ratio of Mg / Zn is 0.17, the ratio of Cu / Mg is 0.47, the ratio of Cu / Ti is 1.75, other individual impurities are ≤0.005%, and the sum of impurities is ≤0.1%.

[0039] The production method of described automobile bumper with 7000 series alloy material, concrete production method is:

[0040](1) According to the designed aluminum alloy component distribution ratio, industrial pure aluminum and pure zinc with more than 99.99% are used as the main raw materials respectively, and the melting temperature of pure aluminum is set at 680°C. After the pure aluminum is ...

Embodiment 2

[0045] A 7000 series alloy material for automobile bumper, characterized in that: the alloy composition of aluminum alloy is Zn: 9.0, Mg: 1.6, Cu: 0.75, Zr: 0.65, Ti: 0.45, Sn: 0.15, Mn : 0.25, Ag: 0.035, Co: 0.015, Sc: 0.015, Yb: 0.015, B: 0.002, Cr: 0.003, the balance is aluminum and unavoidable impurities, and the Mg / Zn ratio is 0.178, Cu / Mg ratio is 0.47, Cu / Ti ratio is 1.67, other individual impurities are ≤0.005%, and the sum of impurities is ≤0.1%.

[0046] The production method of described automobile bumper with 7000 series alloy material, concrete production method is:

[0047] (1) According to the designed aluminum alloy component distribution ratio, industrial pure aluminum and pure zinc with more than 99.99% are used as the main raw materials respectively, and the melting temperature of pure aluminum is set at 680°C. After the pure aluminum is melted, an appropriate amount of 99.99% is added in sequence More than pure magnesium, more than 99.99% pure Sn, Al-10Zr ...

Embodiment 3

[0052] A 7000-series alloy material for automobile bumpers, characterized in that: the alloy composition of the aluminum alloy is calculated by mass fraction: the alloy composition of the aluminum alloy is calculated by mass fraction: Zn: 9.3, Mg: 1.7, Cu: 0.8, Zr : 0.7, Ti: 0.5, Sn: 0.2, Mn: 0.3, Ag: 0.05, Co: 0.02, Sc: 0.02, Yb: 0.02, B: 0.005, Cr: 0.004, the balance is aluminum and unavoidable impurities, and The Mg / Zn ratio is 0.183, the Cu / Mg ratio is 0.47, the Cu / Ti ratio is 1.6, other single impurities are ≤0.005%, and the sum of impurities is ≤0.1%.

[0053] The production method of described automobile bumper with 7000 series alloy material, concrete production method is:

[0054] (1) According to the designed aluminum alloy component distribution ratio, industrial pure aluminum and pure zinc with more than 99.99% are used as the main raw materials respectively, and the melting temperature of pure aluminum is set at 680°C. After the pure aluminum is melted, an appropr...

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Abstract

The invention discloses a 7, 000-series alloy material for automobile bumpers. The 7, 000-series alloy material for the automobile bumpers is characterized in that the aluminum alloy comprises the alloy ingredients of Zn, Mg, Cu, Zr, Ti, Sn, Mn, Ag, Co, Sc, Yb, B, Cr4 and the balance aluminum and unavoidable impurities, wherein the ratio of Mg to Zn ranges from 0.17 to 0.19, the ratio of Cu to Mgranges from 0.43 to 0.53, the ratio of Cu to Ti ranges from 1.5 to 1.8, the content of one single impurity is smaller than or equal to 0.005%, the total content of the impurities is smaller than or equal to 0.1%, the average grain diameter of aluminum alloy grains ranges from 20 microns to 40 microns. When the alloy is observed through SEM and TEM, the area percentage of the strengthening phase MgZn2 ranges from 1% to 1.6% while the average size of the MgZn2 ranges from 50 nanometers to 60 nanometers, the area percentage of the strengthening phase Mg2Sn ranges from 0.3% to 0.6% while the average size of the Mg2Sn ranges from 30 nanometers to 50 nanometers, the area percentage of the strengthening phase Al6Mn ranges from 0.3% to 0.4% while the average size of the Al6Mn ranges from 20 nanometers to 30 nanometers, the area percentage of the strengthening phase Al3Ti ranges from 0.5% to 0.8% while the average size of the Al3Ti ranges from 20 nanometers to 30 nanometers, the yield strengthranges from 580 MPa to 650 Mpa, the tensile strength ranges from 670 MPa to 720 MPa, and the elongation ranges from 18% to 23%.

Description

technical field [0001] The content of the invention belongs to the field of metal materials, and specifically discloses a 7000 series alloy material for automobile bumpers and a production method thereof. Background technique [0002] In recent years, in order to save resources and energy and reduce environmental pollution, high strength and light weight have gradually become the consensus of research and development in the field of metal materials. With the continuous improvement of automobile production and sales, the demand for lightweight auto parts is also becoming stronger and stronger. In order to cope with such increasing material demand, researchers are paying more and more attention to the panel (hood, door, roof, etc. outer panel, inner panel), bumper reinforcement and door anti-collision beam in the car body. Aluminum alloy materials such as aluminum alloys are applicable, and some steel materials such as steel plates can be replaced. However, in order to reduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/03C22F1/053
CPCC22C1/026C22C1/03C22C21/10C22F1/053
Inventor 周建武
Owner 温州市赢创新材料技术有限公司
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