阅读说明：本技术 一种5g通讯基站壳体用压铸铝合金材料及方法 (Die-casting aluminum alloy material for 5G communication base station shell and method ) 是由 张军国 于 2020-12-01 设计创作，主要内容包括：本发明公开了一种5G通讯基站壳体用压铸铝合金材料及方法,包括按重量百分比计的如下组分：0.1％的Zn,0.05％的Mg,0.1％的Nb,0.1％的Zr,0.5％的Re,2％的Cu,2％的Si,0.1％的Be,稀土元素0.5％,0.001％的碳纳米管,余量为Al和不可避免的杂质,所述不可避免的杂质的含量不超过0.01％；5G通讯基站壳体用压铸铝合金材料的制备方法,包括如下步骤熔化、精炼、压铸、铸胚固溶；本发明公开了一种5G通讯基站壳体用压铸铝合金材料及方法,该制备方法制备得到的压铸铝合金材料散热性能强,强度和硬度高,抗磨性、耐腐蚀性和稳定性极佳,抗疲劳效果明显,使用寿命长,具有较高的抗拉强度和较好延展性能,具有较高的抗压强度和抗冲击强度。(The invention discloses a die-casting aluminum alloy material for a 5G communication base station shell and a method, wherein the die-casting aluminum alloy material comprises the following components in percentage by weight: 0.1% of Zn, 0.05% of Mg, 0.1% of Nb, 0.1% of Zr, 0.5% of Re, 2% of Cu, 2% of Si, 0.1% of Be, 0.5% of rare earth elements, 0.001% of carbon nanotubes, and the balance of Al and inevitable impurities, wherein the content of the inevitable impurities is not more than 0.01%; the preparation method of the die-casting aluminum alloy material for the 5G communication base station shell comprises the following steps of melting, refining, die-casting and casting blank solid solution; the die-casting aluminum alloy material prepared by the preparation method has the advantages of strong heat dissipation performance, high strength and hardness, excellent wear resistance, corrosion resistance and stability, obvious fatigue resistance effect, long service life, higher tensile strength, better extensibility and higher compressive strength and impact strength.)

1. The die-casting aluminum alloy material for the 5G communication base station shell is characterized by comprising the following components in percentage by weight: 0.1% of Zn, 0.05% of Mg, 0.1% of Nb, 0.1% of Zr, 0.5% of Re, 2% of Cu, 2% of Si, 0.1% of Be, 0.5% of rare earth elements, 0.001% of carbon nanotubes, and the balance of Al and inevitable impurities, wherein the content of the inevitable impurities is not more than 0.01%.

2. The die-cast aluminum alloy material for the 5G communication base station housing as claimed in claim 1, wherein the rare earth element is formed by mixing Dy, Y and Ho in a mass ratio of 1:3: 1.

3. The die-cast aluminum alloy material for the 5G communication base station shell as claimed in claim 1, wherein the preparation method of the die-cast aluminum alloy material for the 5G communication base station shell comprises the following steps:

step S1: adding an aluminum ingot into a smelting furnace for melting, adding silicon when the temperature of the molten metal is increased to 750-800 ℃, stirring the molten metal until the silicon is completely melted, and then preserving the heat for 10-15 minutes; then heating to 820 ℃ and 850 ℃, and adding Nb, Zr, Re, Si and Be into the molten metal; stirring the molten metal and heating the molten metal, adding Zn, Mg, Cu, rare earth elements and carbon nanotubes when the molten metal reaches 880-920 ℃, and stirring for 30-40 minutes to obtain an aluminum alloy molten liquid;

step S2: cooling the aluminum alloy melt prepared in the step S1 to 720-750 ℃, adding a dried refining agent into the aluminum alloy melt, spraying nitrogen or helium for refining, and keeping the temperature for 30 minutes each time; then stirring, slagging off and filtering are sequentially carried out to obtain refined aluminum alloy melt; sampling to test chemical components of the alloy, comparing the difference between the designed components and the actually measured components, carrying out fine adjustment, carrying out secondary sampling test, and entering the next step after ensuring that the alloy components reach the standard;

step S3: pouring the refined aluminum alloy melt qualified in the step S2 into a die, and performing die casting to form a casting blank;

step S4: and (5) carrying out casting blank solution treatment on the aluminum alloy blank die-cast and formed in the step S3, carrying out water quenching, and cooling along with the furnace to obtain the die-cast aluminum alloy material for the 5G communication base station shell.

4. The die-cast aluminum alloy material for the 5G communication base station shell as claimed in claim 3, wherein the refining agent comprises the following components in parts by weight: 40-50 parts of industrial salt, 10-20 parts of potassium chloride, 20-30 parts of calcium fluoride and 10-20 parts of quartz sand.

5. The die-cast aluminum alloy material for a 5G communication base station case as claimed in claim 3, wherein the mass ratio of the molten aluminum alloy to the refining agent in step S2 is 100: 0.5.

6. The die-cast aluminum alloy material for 5G communication base station housings as claimed in claim 3, wherein the solution treatment of the cast billet in the step S4 is to keep the temperature of the cast billet at 500 ℃ for 10h and then quench-cool the cast billet in water at 60-100 ℃.

7. The die-cast aluminum alloy material for the 5G communication base station shell as claimed in claim 3, wherein the die-cast aluminum alloy material has a tensile strength of 391-395 MPa and an elongation of 8.0-8.9% at room temperature.

8. The die-cast aluminum alloy material for the 5G communication base station shell as claimed in claim 3, wherein the filtering is ceramic filtering.

Technical Field

The invention relates to an aluminum alloy material, in particular to a die-casting aluminum alloy material for a 5G communication base station shell and a method.

Background

In recent years, 5G communication base stations have been widely used instead of 2G, 3G and 4G communication base stations, and accordingly, in order to satisfy the commercial application of 5G technology, it is necessary to update the relevant equipment materials, including materials applied to various communication base stations, antenna equipment and equipment terminals.

The die-casting aluminum alloy material for the 5G communication base station shell is a common material for the 5G communication base station related to the application, can provide a base plate for fixing electronic devices and circuit boards in the base station, and can also be a main heat dissipation device for the devices in the base station, and has the characteristics of light weight, good toughness, corrosion resistance and the like. However, the die-casting aluminum alloy used by the existing 2G, 3G and 4G communication base stations is low in strength, elongation and hardness, is easy to deform, break, corrode and the like, and the heat conductivity of the die-casting aluminum alloy needs to be further improved, so that the requirements of light weight and heat dissipation of the 5G wireless base station cannot be met.

Disclosure of Invention

In order to overcome the defects of the technology, the invention provides a die-casting aluminum alloy material for a 5G communication base station shell and a method.

In order to solve the technical problems, the invention adopts the technical scheme that: the die-casting aluminum alloy material for the 5G communication base station shell is characterized by comprising the following components in percentage by weight: 0.1% of Zn, 0.05% of Mg, 0.1% of Nb, 0.1% of Zr, 0.5% of Re, 2% of Cu, 2% of Si, 0.1% of Be, 0.5% of rare earth elements, 0.001% of carbon nanotubes, and the balance of Al and inevitable impurities, wherein the content of the inevitable impurities is not more than 0.01%.

Furthermore, the rare earth elements are formed by mixing Dy, Y and Ho according to the mass ratio of 1:3: 1.

Further, the preparation method of the die-casting aluminum alloy material for the 5G communication base station shell comprises the following steps:

step S1: adding an aluminum ingot into a smelting furnace for melting, adding silicon when the temperature of the molten metal is increased to 750-800 ℃, stirring the molten metal until the silicon is completely melted, and then preserving the heat for 10-15 minutes; then heating to 820 ℃ and 850 ℃, and adding Nb, Zr, Re, Si and Be into the molten metal; stirring the molten metal and heating the molten metal, adding Zn, Mg, Cu, rare earth elements and carbon nanotubes when the molten metal reaches 880-920 ℃, and stirring for 30-40 minutes to obtain an aluminum alloy molten liquid;

step S2: cooling the aluminum alloy melt prepared in the step S1 to 720-750 ℃, adding a dried refining agent into the aluminum alloy melt, spraying nitrogen or helium for refining, and keeping the temperature for 30 minutes each time; then stirring, slagging off and filtering are sequentially carried out to obtain refined aluminum alloy melt; sampling to test chemical components of the alloy, comparing the difference between the designed components and the actually measured components, carrying out fine adjustment, carrying out secondary sampling test, and entering the next step after ensuring that the alloy components reach the standard;

step S3: pouring the refined aluminum alloy melt qualified in the step S2 into a die, and performing die casting to form a casting blank;

step S4: and (5) carrying out casting blank solution treatment on the aluminum alloy blank die-cast and formed in the step S3, carrying out water quenching, and cooling along with the furnace to obtain the die-cast aluminum alloy material for the 5G communication base station shell.

Further, the refining agent comprises the following components in parts by weight: 40-50 parts of industrial salt, 10-20 parts of potassium chloride, 20-30 parts of calcium fluoride and 10-20 parts of quartz sand.

Further, the mass ratio of the aluminum alloy melt to the refining agent in step S2 is 100: 0.5.

Further, in the step S4, the casting blank solution treatment is to keep the temperature of the casting blank at 500 ℃ for 10 hours, and then quench and cool the casting blank in water at 60-100 ℃.

Furthermore, the die-casting aluminum alloy material has tensile strength of 391-395 MPa at room temperature and elongation of 8.0-8.9%.

Further, the filtration adopts a ceramic filtration mode.

The die-casting aluminum alloy material prepared by the preparation method has the advantages of strong heat dissipation performance, high strength and hardness, excellent wear resistance, corrosion resistance and stability, obvious fatigue resistance effect, long service life, higher tensile strength, better extensibility and higher compressive strength and impact strength.

Detailed Description

In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention more comprehensible, the present invention is further described with reference to the following examples. The examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.

Example 1

The die-casting aluminum alloy material for the 5G communication base station shell comprises the following components in percentage by weight: 0.1% of Zn, 0.05% of Mg, 0.1% of Nb, 0.1% of Zr, 0.5% of Re, 2% of Cu, 2% of Si, 0.1% of Be, 0.5% of rare earth elements, 0.001% of carbon nanotubes, and the balance of Al and inevitable impurities, wherein the content of the inevitable impurities is not more than 0.01%. Wherein the rare earth elements are formed by mixing Dy, Y and Ho according to the mass ratio of 1:3: 1.

The preparation method of the die-casting aluminum alloy material for the 5G communication base station shell comprises the following steps:

step S1: adding an aluminum ingot into a smelting furnace for melting, adding silicon when the temperature of the molten metal is increased to 750-800 ℃, stirring the molten metal until the silicon is completely melted, and then preserving the heat for 10-15 minutes; then heating to 820 ℃ and 850 ℃, and adding Nb, Zr, Re, Si and Be into the molten metal; stirring the molten metal and heating the molten metal, adding Zn, Mg, Cu, rare earth elements and carbon nanotubes when the molten metal reaches 880-920 ℃, and stirring for 30-40 minutes to obtain an aluminum alloy molten liquid;

step S2: cooling the aluminum alloy melt prepared in the step S1 to 720-750 ℃, adding a dried refining agent into the aluminum alloy melt, spraying nitrogen or helium for refining, and keeping the temperature for 30 minutes each time; then stirring, slagging off and filtering are sequentially carried out to obtain refined aluminum alloy melt; sampling to test chemical components of the alloy, comparing the difference between the designed components and the actually measured components, carrying out fine adjustment, carrying out secondary sampling test, and entering the next step after ensuring that the alloy components reach the standard;

step S3: pouring the refined aluminum alloy melt qualified in the step S2 into a die, and performing die casting to form a casting blank;

step S4: and (5) carrying out casting blank solution treatment on the aluminum alloy blank die-cast and formed in the step S3, carrying out water quenching, and cooling along with the furnace to obtain the die-cast aluminum alloy material for the 5G communication base station shell.

The refining agent comprises the following components in parts by weight: 50 parts of industrial salt, 10 parts of potassium chloride, 30 parts of calcium fluoride and 10 parts of quartz sand. In step S2, the mass ratio of the aluminum alloy melt to the refining agent is 100: 0.5. And in the step S4, the casting blank solution treatment is to keep the temperature of the casting blank at 500 ℃ for 10h, and then quench and cool the casting blank in water at 60-100 ℃. The filtration adopts a ceramic filtration mode.

The die-casting aluminum alloy material has tensile strength of 393MPa at room temperature and elongation of 8.9%.

Example 2

The die-casting aluminum alloy material for the 5G communication base station shell comprises the following components in percentage by weight: 0.1% of Zn, 0.05% of Mg, 0.1% of Nb, 0.1% of Zr, 0.5% of Re, 2% of Cu, 2% of Si, 0.1% of Be, 0.5% of rare earth elements, 0.001% of carbon nanotubes, and the balance of Al and inevitable impurities, wherein the content of the inevitable impurities is not more than 0.01%. Wherein the rare earth elements are formed by mixing Dy, Y and Ho according to the mass ratio of 1:3: 1.

The preparation method of the die-casting aluminum alloy material for the 5G communication base station shell comprises the following steps:

step S1: adding an aluminum ingot into a smelting furnace for melting, adding silicon when the temperature of the molten metal is increased to 750-800 ℃, stirring the molten metal until the silicon is completely melted, and then preserving the heat for 10-15 minutes; then heating to 820 ℃ and 850 ℃, and adding Nb, Zr, Re, Si and Be into the molten metal; stirring the molten metal and heating the molten metal, adding Zn, Mg, Cu, rare earth elements and carbon nanotubes when the molten metal reaches 880-920 ℃, and stirring for 30-40 minutes to obtain an aluminum alloy molten liquid;

step S2: cooling the aluminum alloy melt prepared in the step S1 to 720-750 ℃, adding a dried refining agent into the aluminum alloy melt, spraying nitrogen or helium for refining, and keeping the temperature for 30 minutes each time; then stirring, slagging off and filtering are sequentially carried out to obtain refined aluminum alloy melt; sampling to test chemical components of the alloy, comparing the difference between the designed components and the actually measured components, carrying out fine adjustment, carrying out secondary sampling test, and entering the next step after ensuring that the alloy components reach the standard;

step S3: pouring the refined aluminum alloy melt qualified in the step S2 into a die, and performing die casting to form a casting blank;

step S4: and (5) carrying out casting blank solution treatment on the aluminum alloy blank die-cast and formed in the step S3, carrying out water quenching, and cooling along with the furnace to obtain the die-cast aluminum alloy material for the 5G communication base station shell.

The refining agent comprises the following components in parts by weight: 45 parts of industrial salt, 15 parts of potassium chloride, 25 parts of calcium fluoride and 15 parts of quartz sand. In step S2, the mass ratio of the aluminum alloy melt to the refining agent is 100: 0.5. And in the step S4, the casting blank solution treatment is to keep the temperature of the casting blank at 500 ℃ for 10h, and then quench and cool the casting blank in water at 60-100 ℃. The filtration adopts a ceramic filtration mode.

The die-casting aluminum alloy material has tensile strength of 391MPa at room temperature and elongation of 8.5 percent.

Example 3

The die-casting aluminum alloy material for the 5G communication base station shell comprises the following components in percentage by weight: 0.1% of Zn, 0.05% of Mg, 0.1% of Nb, 0.1% of Zr, 0.5% of Re, 2% of Cu, 2% of Si, 0.1% of Be, 0.5% of rare earth elements, 0.001% of carbon nanotubes, and the balance of Al and inevitable impurities, wherein the content of the inevitable impurities is not more than 0.01%. Wherein the rare earth elements are formed by mixing Dy, Y and Ho according to the mass ratio of 1:3: 1.

The preparation method of the die-casting aluminum alloy material for the 5G communication base station shell comprises the following steps:

step S1: adding an aluminum ingot into a smelting furnace for melting, adding silicon when the temperature of the molten metal is increased to 750-800 ℃, stirring the molten metal until the silicon is completely melted, and then preserving the heat for 10-15 minutes; then heating to 820 ℃ and 850 ℃, and adding Nb, Zr, Re, Si and Be into the molten metal; stirring the molten metal and heating the molten metal, adding Zn, Mg, Cu, rare earth elements and carbon nanotubes when the molten metal reaches 880-920 ℃, and stirring for 30-40 minutes to obtain an aluminum alloy molten liquid;

step S2: cooling the aluminum alloy melt prepared in the step S1 to 720-750 ℃, adding a dried refining agent into the aluminum alloy melt, spraying nitrogen or helium for refining, and keeping the temperature for 30 minutes each time; then stirring, slagging off and filtering are sequentially carried out to obtain refined aluminum alloy melt; sampling to test chemical components of the alloy, comparing the difference between the designed components and the actually measured components, carrying out fine adjustment, carrying out secondary sampling test, and entering the next step after ensuring that the alloy components reach the standard;

step S3: pouring the refined aluminum alloy melt qualified in the step S2 into a die, and performing die casting to form a casting blank;

step S4: and (5) carrying out casting blank solution treatment on the aluminum alloy blank die-cast and formed in the step S3, carrying out water quenching, and cooling along with the furnace to obtain the die-cast aluminum alloy material for the 5G communication base station shell.

The refining agent comprises the following components in parts by weight: 40 parts of industrial salt, 20 parts of potassium chloride, 20 parts of calcium fluoride and 20 parts of quartz sand. In step S2, the mass ratio of the aluminum alloy melt to the refining agent is 100: 0.5. And in the step S4, the casting blank solution treatment is to keep the temperature of the casting blank at 500 ℃ for 10h, and then quench and cool the casting blank in water at 60-100 ℃. The filtration adopts a ceramic filtration mode.

The die-casting aluminum alloy material has the tensile strength of 395MPa at room temperature and the elongation of 8.0 percent.

The die-casting aluminum alloy material prepared by the preparation method has the advantages of strong heat dissipation performance, high strength and hardness, excellent wear resistance, corrosion resistance and stability, obvious fatigue resistance effect, long service life, higher tensile strength, better extensibility and higher compressive strength and impact strength.

The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.