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High-strength corrosion-resistant aluminum alloy for automobile and preparation method thereof

A corrosion-resistant aluminum alloy, high-strength technology, applied in the field of aluminum alloy materials, can solve problems such as poor corrosion resistance and strength, and unsatisfactory fatigue resistance.

Pending Publication Date: 2021-10-22
黄山市龙特金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing aluminum alloys still have deficiencies, such as poor corrosion resistance and strength, and unsatisfactory fatigue resistance, which cannot meet the rapid development of my country's automobile industry. The corrosion resistance and mechanical strength of aluminum alloys are getting higher and higher. requirements, it needs to be modified

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A high-strength corrosion-resistant aluminum alloy for automobiles proposed by the present invention, its composition includes: Si: 0.7%, Fe: 0.138%, Cu: 0.5%, Mn: 1.2%, RE: 0.15%, Ti: 0.02%, Cr: 0.1%, Zr: 0.035%, Sc: 0.01%, Ni: 0.2%, Mo: 0.056%, V: 0.05%, Ir: 0.09%, the balance is Al; among them, RE is La, Sm , Ce, Er mixture.

[0022] The present invention also proposes a method for preparing the high-strength corrosion-resistant aluminum alloy for automobiles, comprising the following steps:

[0023] S1. Select raw materials according to the mass ratio, and smelt the selected raw materials to obtain alloy liquid;

[0024] S2, performing continuous casting of the alloy liquid obtained in S1 to obtain a slab;

[0025] S3. Continuously rolling the slab obtained in S2; wherein, during the rolling process, the rolling temperature is T1, the finishing temperature is T2, T1=525°C, T2=241°C.

Embodiment 2

[0027] A high-strength corrosion-resistant aluminum alloy for automobiles proposed by the present invention, its composition includes: Si: 1%, Fe: 0.11%, Cu: 1.3%, Mn: 0.9%, La: 0.2%, Sm: 0.1%, Ce: 0.1%, Er: 0.1%, Ti: 0.015%, Cr: 0.14%, Zr: 0.045%, Sc: 0.015%, Ni: 0.52%, Mo: 0.02%, V: 0.17%, Ir: 0.02%, and the balance is Al.

[0028] The present invention also proposes a method for preparing the high-strength corrosion-resistant aluminum alloy for automobiles, comprising the following steps:

[0029] S1. Select raw materials according to the mass ratio, and smelt the selected raw materials to obtain alloy liquid;

[0030] S2, performing continuous casting of the alloy liquid obtained in S1 to obtain a slab;

[0031] S3. Continuously rolling the slab obtained in S2; wherein, during the rolling process, the rolling temperature is T1, the finishing temperature is T2, T1=540°C, T2=262°C.

Embodiment 3

[0033] A high-strength corrosion-resistant aluminum alloy for automobiles proposed by the present invention, its composition includes: Si: 0.8%, Fe: 0.12%, Cu: 0.8%, Mn: 1%, La: 0.2%, Sm: 0.1%, Ce: 0.1%, Er: 0.1%, Ti: 0.027%, Cr: 0.106%, Zr: 0.04%, Sc: 0.005%, Ni: 0.3%, Mo: 0.028%, V: 0.08%, Ir: 0.07%, and the balance is Al.

[0034] The present invention also proposes a method for preparing the high-strength corrosion-resistant aluminum alloy for automobiles, comprising the following steps:

[0035] S1. Select raw materials according to the mass ratio, and smelt the selected raw materials to obtain alloy liquid;

[0036]S2. Continuously casting the molten alloy obtained in S1 to obtain a slab; wherein, the casting temperature is 680°C;

[0037] S3. Continuously rolling the cast slab obtained in S2; wherein, during the rolling process, the rolling temperature is T1, the finishing rolling temperature is T2, T1=532°C, T2=266°C; Including performing homogenization treatment on...

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Abstract

The invention discloses a high-strength corrosion-resistant aluminum alloy for an automobile and a preparation method thereof. The aluminum alloy is prepared from, by mass, 0.7%-1% of Si, 0.11%-0.138% of Fe, 0.5%-1.3% of Cu, 0.9%-1.2% of Mn, 0.15%-0.5% of RE, 0.015%-0.027% of Ti, 0.07%-0.14% of Cr, 0.035%-0.045% of Zr, 0.005%-0.015% of Sc, 0.2%-0.52% of Ni, 0.02%-0.056% of Mo, 0.05%-0.17% of V, 0.02%-0.09% of Ir and the balance of Al. RE is a mixture of La, Sm, Ce and Er. The preparation method is simple in process, and the obtained aluminum alloy is high in strength, good in corrosion resistance and fatigue resistance, capable of meeting the use requirements of the automobile and long in service life.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy materials, in particular to a high-strength corrosion-resistant aluminum alloy for automobiles and a preparation method thereof. Background technique [0002] Aluminum alloy is light in weight, high in strength, good in toughness, can be processed into various profiles, and has excellent electrical conductivity, thermal conductivity and corrosion resistance. It has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. industry and other fields. However, the existing aluminum alloys still have deficiencies, such as poor corrosion resistance and strength, and unsatisfactory fatigue resistance, which cannot meet the rapid development of my country's automobile industry. The corrosion resistance and mechanical strength of aluminum alloys are getting higher and higher. needs to be modified. Contents of the invention [0003] Based on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C21/00C22C21/02C22C21/14C22F1/04C22F1/043C22F1/057C21D9/00B21B37/74B21B3/00
CPCC22C1/026C22C1/03C22C21/02C22C21/14C22C21/00C22F1/043C22F1/057C22F1/04C21D9/0081B21B3/00B21B37/74B21B2003/001
Inventor 刘逢高峰
Owner 黄山市龙特金属制品有限公司
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