Preparation method of aluminum alloy material for automobile

A technology for aluminum alloy materials and automobiles, applied in the field of aluminum alloy materials, can solve problems such as insufficient strength, toughness and corrosion resistance

Pending Publication Date: 2021-10-22
黄山市龙跃铜业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of science and technology, the requirements for the strength, toughness and corrosion resistance of aluminum alloy are increasing day by day. At present, there are ma

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing an aluminum alloy material for automobiles, comprising the following steps:

[0021] S1. Select raw materials for smelting and casting to obtain ingots; wherein, the composition of the ingots includes: Zn: 9.4%, Mg: 2.4%, Cu: 2.42%, Zr: 0.09%, Cr: 0.11% , Yb: 0.07%, Ag+Li+Sn: 0.4%, Ti: 0.1%, and the balance is Al;

[0022] S2, homogenizing the ingot obtained in S1;

[0023] S3, hot-rolling, intermediate annealing, and cold-rolling after the ingot face milling after the homogenization treatment in S2 to obtain a billet;

[0024] S4. Perform solution treatment and aging treatment on the blank obtained in S3 to obtain the aluminum alloy material for automobiles; wherein, the solution treatment process includes: keeping the blank at 455°C for 5 hours, and then heating the blank at 1°C / min The average cooling rate is lowered to 415°C for 2 hours, and then the temperature is raised to 480°C for 10 minutes at an average heating rate of 18°C / min, and wa...

Embodiment 2

[0026] A method for preparing an aluminum alloy material for automobiles, comprising the following steps:

[0027] S1. Select raw materials for smelting and casting to obtain ingots; wherein, the composition of the ingots includes: Zn: 8.9%, Mg: 3.01%, Cu: 2.05%, Zr: 0.1%, Cr: 0.135% , Yb: 0.09%, Ag: 0.11%, Li: 0.09%, Sn: 0.2%, Ti: 0.15%, and the balance is Al;

[0028] S2, homogenizing the ingot obtained in S1;

[0029] S3, hot-rolling, intermediate annealing, and cold-rolling after the ingot face milling after the homogenization treatment in S2 to obtain a billet;

[0030] S4. Perform solution treatment and aging treatment on the blank obtained in S3 to obtain the aluminum alloy material for automobiles; wherein, the solution treatment process includes: keeping the blank at 470°C for 2.5h, and then heating the blank at 2°C / The average cooling rate of min is to cool down to 360 °C for 5 hours, and then the temperature is raised to 495 °C for 5 min at an average heating rat...

Embodiment 3

[0032] A method for preparing an aluminum alloy material for automobiles, comprising the following steps:

[0033] S1. Select raw materials for smelting and casting to obtain ingots; wherein, the composition of the ingots includes: Zn: 9.2%, Mg: 2.6%, Cu: 2.35%, Zr: 0.14%, Cr: 0.1% , Yb: 0.18%, Ag: 0.08%, Li: 0.056%, Sn: 0.224%, Ti: 0.12%, and the balance is Al; wherein, the melting temperature is 746°C;

[0034] S2. Homogenize the ingot obtained in S1; wherein, the homogenization process includes: heating from room temperature to 350°C at an average heating rate of 45°C / h for 11 hours, and then heating at an average heating rate of 12°C / h The average heating rate is raised to 465°C for 2 hours, then the temperature is raised to 475°C at an average heating rate of 20°C / h for 7 hours, and then the temperature is raised to 495°C at an average heating rate of 20°C / h for 6 hours;

[0035] S3. Hot rolling, intermediate annealing, and cold rolling are performed on the surface milli...

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Abstract

The invention discloses a preparation method of an aluminum alloy material for an automobile. The preparation method comprises the following steps of smelting and casting raw materials containing specific components, and carrying out homogenization, surface milling, hot rolling, intermediate annealing, cold rolling, solid solution and aging treatment on the obtained cast ingot. The solid solution process comprises the following steps of keeping the temperature at 455-470 DEG C for 2.5-5 hours, cooling to 360-415 DEG C at an average cooling speed of 1-2 DEG C/min, keeping the temperature for 2-5 hours, heating to 480-495 DEG C at an average heating speed of 13-18 DEG C/min, keeping the temperature for 5-10 minutes, and carrying out water quenching. The aging treatment comprises three-stage aging, the temperature of the first-stage aging and the third-stage aging is 115-130 DEG C, the time is 15-20 hours, the temperature of the second-stage aging is 175-185 DEG C, the time is tmin, t is equal to 75-100*k*CSn + Ag + Li, CSn + Ag + Li is the sum of the mass fractions of Sn, Ag and Li in the cast ingot, and k is equal to 10-50.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy materials, in particular to a method for preparing aluminum alloy materials for automobiles. Background technique [0002] Aluminum alloy is an alloy composed of aluminum as the matrix element and then adding one or more alloy elements. It has low density, high specific strength, good corrosion resistance, easy forming, and good electrical and thermal conductivity. It has been widely used in the automotive field, and is often used to prepare cylinder heads, cylinder blocks or transmission housings of engines, etc. With the development of science and technology, the requirements for the strength, toughness and corrosion resistance of aluminum alloy are increasing day by day. At present, there are many types of aluminum alloy materials disclosed, which are still insufficient in strength, toughness and corrosion resistance in the automotive field. defects, which limit its application. Conte...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C21/10
CPCC22C1/026C22C21/10
Inventor 金义泉
Owner 黄山市龙跃铜业有限公司
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