CN-118288633-B - Thin-wall high-strength aluminum alloy material and preparation method thereof

Abstract

The invention provides a thin-wall high-strength aluminum alloy material which is formed by compounding an aluminum alloy and a continuous w-shaped reticular ceramic film, wherein the mass ratio of the aluminum alloy to the reticular ceramic film in the aluminum alloy material is 100:2.5-4, and the aluminum alloy material comprises the following components of 1-1.2 parts of Si, 0.1-0.15 part of Cr, 0.6-0.75 part of Mg, 0.1-0.25 part of Fe, 0.05-0.1 part of Zn and 96-97.5 parts of Al. According to the invention, the ceramic reinforced film is prepared into the w-shaped reticular ceramic film, and the w-shaped reticular film has a better energy absorption effect in the laminated reinforced aluminum alloy of the w-shaped reticular ceramic film, so that the aluminum alloy has an impact-resistant effect.

Inventors

• CUI LIXIN
• XIN WENXIA
• LI CHENG
• XU QINGBIN
• ZHANG XIAO
• YANG GUOQIANG
• LI MING
• XU YINGJIE
• WANG ZHIWEI
• WANG HUANYU
• LIANG PENG
• ZHAO XIAOGUANG
• Gan Weike
• GUO SHUAI
• ZHANG WEI
• ZHAO HU
• SUN YU
• ZHENG TINGTING
• WANG SHICHAO
• FENG ZONGLING
• TANG JIANGUO
• WU SHENGLI
• GAO SHANGHUI
• JIAO PEIYONG
• CUI LEI
• LV TAO

Assignees

• 山东创新金属科技有限公司
• 山东创新合金研究院有限公司

Dates

Publication Date

20260512

Application Date

20240222

Claims (5)

1. 1. A thin-wall high-strength aluminum alloy material is characterized in that the aluminum alloy material is formed by compounding an aluminum alloy and a continuous w-shaped reticular ceramic film, the mass ratio of the aluminum alloy to the reticular ceramic film in the aluminum alloy material is 100:2.5-4, The aluminum alloy material consists of the following components: Si is 1-1.2 parts Cr is 0.1-0.15 part 0.6 To 0.75 part of Mg0 Fe 0.1-0.25 parts Zn in 0.05-0.1 weight portions 96-97.5 Parts of Al; The preparation method of the thin-wall high-strength aluminum alloy material comprises the following steps: S1, preparing an electrostatic spinning solution, namely dissolving Al (NO 3 ) 3 ·9H 2 O in water, then adding Al powder, wherein the mass ratio of the Al powder to the Al (NO 3 ) 3 ·9H 2 O is 4-6:1), removing insoluble impurities after heating reflux reaction, concentrating under reduced pressure, adding a manganese acetate solution, glacial acetic acid and a proper amount of PVP, wherein the mass ratio of the Al 3+ to the Mn 2+ is 15-20:1, and stirring to obtain transparent uniform sol; S2, preparing an electrostatic spinning film, namely carrying out electrostatic spinning on the sol prepared in the step S1 to obtain the electrostatic spinning film with the thickness of 0.1-0.2 mm; S3, sintering the ceramic membrane, namely bending and fixing the electrostatic spinning membrane prepared in the step S2, and sintering to obtain a w-shaped reticular ceramic membrane, wherein the bending angle of the w-shaped reticular ceramic membrane is 30-45 degrees; S4, adding the w-shaped reticular ceramic film prepared in the step S3 into a casting mould in a lamination mode, pouring molten aluminum, cooling and carrying out homogenization treatment to obtain the pressure-resistant aluminum alloy material.
2. 2. The thin-wall high-strength aluminum alloy material according to claim 1, wherein the aluminum content in the sol is 8-10%, and the viscosity is 5.9-7.2mPa.
3. 3. The thin-wall high-strength aluminum alloy material according to claim 1, wherein the sintering parameters are that the temperature is firstly increased from room temperature to 450-500 ℃ at a speed of 1-2 ℃ min -1 , the temperature is kept for 1h, the temperature is continuously increased to 600-650 ℃ at a speed of 1 ℃ min -1 , the temperature is kept for 1h, the temperature is then increased to 900-950 ℃ at a speed of 4-5 ℃ min -1 , and the temperature is kept for 1h and then the material is naturally cooled.
4. 4. The thin-wall high-strength aluminum alloy material according to claim 1, wherein the thickness of the w-shaped reticular ceramic film is 1.5-2.5mm.
5. 5. The thin-wall high-strength aluminum alloy material according to claim 1, wherein the homogenization treatment process is carried out by firstly preserving heat for 1.5-2.5 hours at 520-540 ℃, then preserving heat for 2.5-3.5 hours at 570-585 ℃, and finally cooling to 200 ℃ by strong wind and then cooling by water.

Description

Thin-wall high-strength aluminum alloy material and preparation method thereof Technical Field The invention relates to the field of aluminum alloy materials, in particular to a thin-wall high-strength aluminum alloy material and a preparation method thereof. Background Thin-walled castings are of great advantage in the aerospace and automotive industry because of their lightweight construction which increases the payload and reduces energy loss. And the problem to be solved urgently before is to meet the requirements of designers on the mechanical properties of thin-wall castings. Aluminum alloy materials are promising materials for thin-walled castings due to their low density, high strength coefficient and hardness after casting. The ceramic aluminum alloy combines the advantages of ceramic particles and aluminum alloy, breaks through the performance limitation of single materials, has the advantages of light weight, high rigidity, high strength, high fatigue resistance and high temperature resistance, has mechanical properties far higher than those of aluminum alloy, and simultaneously maintains the good processing and manufacturing properties of aluminum alloy. The nano ceramic aluminum alloy material has the advantages of high rigidity, high strength, high fatigue resistance, high temperature resistance and the like. The nano ceramic aluminum alloy material is developed, and is applied to different parts of an automobile through the optimal design, so that the goals of reducing weight, reducing cost, prolonging fatigue life and the like of the automobile are realized. Disclosure of Invention The invention aims to provide a thin-wall high-strength aluminum alloy material, which is reinforced by adopting an electrostatic spinning ceramic film, wherein the ceramic film is set to be a w-shaped net, and aluminum water can be poured on the ceramic film to obtain the thin-wall high-strength aluminum alloy material. The technical proposal is that the thin-wall high-strength aluminum alloy material is formed by compounding aluminum alloy and a continuous w-shaped reticular ceramic membrane, the mass ratio of the aluminum alloy to the reticular ceramic membrane in the aluminum alloy material is 100:2.5-4, The aluminum alloy material consists of the following components: Si is 1-1.2 parts Cr is 0.1-0.15 part 0.6 To 0.75 part of Mg0 Fe 0.1-0.25 parts Zn in 0.05-0.1 weight portions 96-97.5 Parts of Al. The preparation method of the thin-wall high-strength aluminum alloy material comprises the following steps: S1, preparing an electrostatic spinning solution, namely dissolving Al (NO 3)3·9H2 O) in water, then adding Al powder, wherein the mass ratio of the Al powder to the Al (NO 3)3·9H2 O) is 4-6:1, heating and refluxing for reaction, removing insoluble impurities, concentrating under reduced pressure, adding a manganese acetate solution, glacial acetic acid and a proper amount of PVP, and stirring to obtain transparent and uniform sol; S2, preparing an electrostatic spinning film, namely carrying out electrostatic spinning on the sol prepared in the step S1 to obtain the electrostatic spinning film with the thickness of 0.1-0.2 mm; S3, sintering the ceramic membrane, namely bending and fixing the electrostatic spinning membrane prepared in the step S2, and sintering to obtain a w-shaped reticular ceramic membrane; S4, adding the w-shaped reticular ceramic film prepared in the step S3 into a casting mould in a lamination mode, pouring molten aluminum, cooling and carrying out homogenization treatment to obtain the pressure-resistant aluminum alloy material. Preferably, the mass ratio of Al 3+ to Mn 2+ in the step S1 is 15-20:1. Preferably, the sol contains 8-10% aluminum and has a viscosity of 5.9-7.2mPa. Preferably, the bending angle of the w-shaped reticular ceramic membrane is 30-45 degrees. Preferably, the sintering parameters are that the temperature is firstly increased to 450-500 ℃ from room temperature at the speed of 1-2 ℃ min-1, the temperature is kept for 1h, the temperature is continuously increased to 600-650 ℃ at the speed of 1 ℃ min-1, the temperature is kept for 1h, then the temperature is increased to 900-950 ℃ at the speed of 4-5 ℃ min-1, and the natural cooling is carried out after the temperature is kept for 1h. Preferably, the thickness of the w-shaped reticular ceramic membrane is 1.5-2.5mm. Preferably, the homogenization treatment process is to firstly keep the temperature at 520-540 ℃ for 1.5-2.5h, then keep the temperature at 570-585 ℃ for 2.5-3.5h, and finally cool the mixture to 200 ℃ by strong wind and then cool the mixture by water. The invention has the following advantages: According to the invention, mn element is added into the ceramic material, al (MnFe) Si precipitated phase is generated in alloy casting, and finally, al (MnFe) Si can be better pinned with dislocation through homogenization heat treatment, so that a sample under macroscopic conditions shows higher impact absorpti