阅读说明：本技术 一种耐腐蚀led电子屏用铝材型边框的生产方法 (Production method of corrosion-resistant aluminum frame for LED electronic screen ) 是由 赵欣泰 唐开健 李�杰 王超 傅凡一 贡玉楼 于 2021-01-07 设计创作，主要内容包括：本发明公开了一种耐腐蚀LED电子屏用铝材型边框的生产方法,包括以下步骤：配料、铸造、均匀化、铸棒表面处理、挤压、时效处理和涂布。其中采用的铝合金,由以下重量百分比的成分组成：Si0.005-0.008%、Fe1.2-1.5%、Mn1.8-2.2%、Zn0.25-0.35%、Mg1.35-1.45%、Y0.022-0.035%、Ti0.008-0.015%、余量为Al和不可避免的杂质。本发明的铝合金配方中加入了少量的元素Y(钇),不但可以有效改善晶粒尺寸,使晶粒更加的均匀细小,而且与高纯氮气处理共同使用,使得到铝合金表面更容易与涂膜结合效果更佳,从而更有利于提升耐腐蚀效果。(The invention discloses a production method of an aluminum material type frame for a corrosion-resistant LED electronic screen, which comprises the following steps: batching, casting, homogenizing, cast rod surface treatment, extrusion, aging treatment and coating. The aluminum alloy adopted by the method comprises the following components in percentage by weight: 0.005-0.008% of Si, 1.2-1.5% of Fe1.8-2.2% of Mn, 0.25-0.35% of Zn0.35%, 1.35-1.45% of Mg1.022-0.035% of Y, 0.008-0.015% of Ti0.008-0.015% of Ti and the balance of Al and inevitable impurities. A small amount of element Y (yttrium) is added into the aluminum alloy formula, so that the grain size can be effectively improved, the grains are more uniform and fine, and the aluminum alloy formula is used together with high-purity nitrogen treatment, so that the surface of the aluminum alloy is easier to combine with a coating film, and the corrosion resistance effect is better promoted.)

1. The production method of the aluminum frame for the corrosion-resistant LED electronic screen is characterized by comprising the following steps of:

A. preparing materials: preparing the components of the aluminum alloy for preparing the aluminum profile frame according to the weight percentage;

B. casting: adding the prepared aluminum alloy raw material into a smelting furnace, uniformly mixing, smelting into liquid aluminum alloy, and performing standing, refining, slagging off, online degassing and filtering to melt and cast the liquid aluminum alloy into an aluminum alloy cast rod;

C. homogenizing: homogenizing the aluminum alloy cast rod in a homogenizing furnace, and cooling the aluminum alloy cast rod discharged from the furnace to room temperature by strong wind;

D. surface treatment of the cast rod: sawing the homogenized aluminum alloy cast rod into 1.0-1.2m short aluminum alloy cast ingots, and turning the as-cast surface skin of the short aluminum alloy cast ingot by using a lathe, wherein the turning thickness is 8-10 mm;

E. heating the aluminum alloy ingot to 450-440 ℃, performing extrusion molding at the extrusion speed of 5-6 m/min, the extrusion ratio of 80-90 and the mold temperature of 430-440 ℃, and cooling the aluminum alloy ingot to room temperature through water;

F. heating the extruded aluminum profile frame to 160-170 ℃, aging for 6-8 hours, and cooling along with the furnace;

G. coating an aluminum alloy coating on the surface of the aluminum profile frame, and drying;

the aluminum alloy comprises the following components in percentage by weight: 0.003-0.015% of Si, 1.0-2.0% of Fe1.5-2.5% of Mn1.12-0.35% of Zn0.05-1.85% of Mg1.012-0.045% of Y, 0.005-0.025% of Ti, and the balance of Al and inevitable impurities.

2. The method for producing the aluminum profile frame for the corrosion-resistant LED electronic screen as recited in claim 1, wherein the aluminum alloy comprises the following components by weight percent: 0.005-0.008% of Si, 1.2-1.5% of Fe1.8-2.2% of Mn, 0.25-0.35% of Zn0.35%, 1.35-1.45% of Mg1.022-0.035% of Y, 0.008-0.015% of Ti0.008-0.015% of Ti and the balance of Al and inevitable impurities.

3. The method for producing the aluminum profile frame for the corrosion-resistant LED electronic screen as recited in claim 1, wherein in the step B, argon with a purity of 99.9% is adopted to blow and refine aluminum alloy liquid in the furnace for 25-35min, and the aluminum alloy liquid is kept still for 10-15min after slagging off.

4. The method for producing the aluminum profile frame for the corrosion-resistant LED electronic screen as recited in claim 1, wherein in the step C, the temperature of the homogenization treatment is 350-.

5. The method for producing the aluminum profile frame for the corrosion-resistant LED electronic screen as recited in claim 1, wherein the aluminum alloy coating comprises the following components by weight percent: 100 parts of acrylic emulsion, 20-30 parts of melamine, 1-2 parts of fluorine-containing organic silicon/silicon dioxide hybrid sol, 0.02-0.05 part of defoaming agent, 3-5 parts of dispersing agent, 80-120 parts of deionized water, 0.5-1 part of flatting agent, 0.1-0.3 part of film-forming assistant and 0.5-0.78 part of cross-linking agent KH 5500.3.

6. The method for producing the aluminum profile frame for the corrosion-resistant LED electronic screen as recited in claim 5, wherein the dry film thickness of the aluminum alloy coating is 0.25-0.32 mm.

Technical Field

The invention relates to the technical field, in particular to a production method of an aluminum frame for a corrosion-resistant LED electronic screen.

Background

With the development of large screen and light weight of electronic products such as smart phones, tablet computers, liquid crystal display screens, smart televisions and the like, a high-strength aluminum alloy frame is urgently needed to improve the bending resistance of a machine body so as to avoid the phenomena of bending, bending and the like of the machine body when the machine body is pressed, and meanwhile, the aluminum alloy is required to have excellent oxidation coloring effect so as to meet the high decorative requirement of consumers on the appearance parts of the electronic products. At present, although the aluminum alloy frame in the market has the advantage of high strength, the oxidation coloring effect is poor, and the oxidation film often has the defects of texture stripes, color difference and the like, so that the aluminum alloy oxidation film has poor texture, low glossiness, poor coloring effect and the like, and cannot meet the high decorative requirement of consumers on electronic product appearance pieces. And certain specific application occasions require that the aluminum alloy has better acid and alkali resistance and salt spray corrosion resistance.

Therefore, the existing preparation method of the aluminum alloy frame still needs to be improved and developed, so that the invention provides a production method of the aluminum material type frame for the corrosion-resistant LED electronic screen.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a production method of an aluminum frame for a corrosion-resistant LED electronic screen.

The technical scheme of the invention is as follows:

a production method of an aluminum material type frame for a corrosion-resistant LED electronic screen comprises the following steps:

A. preparing materials: preparing the components of the aluminum alloy for preparing the aluminum profile frame according to the weight percentage;

B. casting: adding the prepared aluminum alloy raw material into a smelting furnace, uniformly mixing, smelting into liquid aluminum alloy, and performing standing, refining, slagging off, online degassing and filtering to melt and cast the liquid aluminum alloy into an aluminum alloy cast rod;

C. homogenizing: homogenizing the aluminum alloy cast rod in a homogenizing furnace, and cooling the aluminum alloy cast rod discharged from the furnace to room temperature by strong wind;

D. surface treatment of the cast rod: sawing the homogenized aluminum alloy cast rod into 1.0-1.2m short aluminum alloy cast ingots, and turning the as-cast surface skin of the short aluminum alloy cast ingot by using a lathe, wherein the turning thickness is 8-10 mm;

E. extruding: heating the aluminum alloy ingot to 450-440 ℃, performing extrusion molding at the extrusion speed of 5-6 m/min, the extrusion ratio of 80-90 and the mold temperature of 430-440 ℃, and cooling the aluminum alloy ingot to room temperature through water;

F. aging treatment, namely heating the extruded aluminum profile frame to 160-170 ℃, aging for 6-8 hours, and cooling along with the furnace;

G. coating: and (3) coating an aluminum alloy coating on the surface of the aluminum profile frame, and drying.

The aluminum alloy comprises the following components in percentage by weight: 0.003-0.015% of Si, 1.0-2.0% of Fe1.5-2.5% of Mn1.12-0.35% of Zn0.05-1.85% of Mg1.012-0.045% of Y, 0.005-0.025% of Ti, and the balance of Al and inevitable impurities.

Further preferably, the aluminum alloy comprises the following components in percentage by weight: 0.005-0.008% of Si, 1.2-1.5% of Fe1.8-2.2% of Mn, 0.25-0.35% of Zn0.35%, 1.35-1.45% of Mg1.022-0.035% of Y, 0.008-0.015% of Ti0.008-0.015% of Ti and the balance of Al and inevitable impurities.

Preferably, in the step B, argon with the purity of 99.9 percent is adopted to blow and refine the aluminum alloy liquid in the furnace for 25-35min, and the furnace is kept still for 10-15min after slagging off.

Preferably, in the step C, the temperature of the homogenization treatment is 350-400 ℃, and the heat preservation time is 6-8 h.

Preferably, the aluminum alloy coating comprises the following components in percentage by weight: 100 parts of acrylic emulsion, 20-30 parts of melamine, 1-2 parts of fluorine-containing organic silicon/silicon dioxide hybrid sol, 0.02-0.05 part of defoaming agent, 3-5 parts of dispersing agent, 80-120 parts of deionized water, 0.5-1 part of flatting agent, 0.1-0.3 part of film-forming assistant and 0.5-0.78 part of cross-linking agent KH 5500.3.

More preferably, the dry film thickness of the aluminum alloy coating is 0.25-0.32 mm.

The invention has the advantages that: the production method of the aluminum frame for the corrosion-resistant LED electronic screen comprises the following steps: batching, casting, homogenizing, cast rod surface treatment, extrusion, aging treatment and coating. The aluminum alloy adopted by the method comprises the following components in percentage by weight: 0.005-0.008% of Si, 1.2-1.5% of Fe1.8-2.2% of Mn, 0.25-0.35% of Zn0.35%, 1.35-1.45% of Mg1.022-0.035% of Y, 0.008-0.015% of Ti0.008-0.015% of Ti and the balance of Al and inevitable impurities. A small amount of Y (yttrium) element is added into the aluminum alloy formula, the yttrium element is a rare earth metal element, and after the Y (yttrium) element is added, the grain size can be effectively improved, so that grains are more uniform and fine, and the Y (yttrium) element is used together with high-purity nitrogen treatment, so that the surface of the aluminum alloy is easier to combine with a coating film, and the corrosion resistance effect is better promoted.

Detailed Description

Example 1

A production method of an aluminum material type frame for a corrosion-resistant LED electronic screen comprises the following steps:

A. preparing materials: preparing the components of the aluminum alloy for preparing the aluminum profile frame according to the weight percentage;

B. casting: adding the prepared aluminum alloy raw material into a smelting furnace, uniformly mixing, smelting into liquid aluminum alloy, and performing standing, refining, slagging off, online degassing and filtering to melt and cast the liquid aluminum alloy into an aluminum alloy cast rod;

C. homogenizing: homogenizing the aluminum alloy cast rod in a homogenizing furnace, and cooling the aluminum alloy cast rod discharged from the furnace to room temperature by strong wind;

D. surface treatment of the cast rod: sawing the homogenized aluminum alloy cast rod into a short aluminum alloy cast ingot of 1.1m, and turning the cast surface of the surface layer of the short aluminum alloy cast ingot by using a lathe, wherein the turning thickness is 8.5 mm;

E. extruding: heating the aluminum alloy cast ingot to 455 ℃, carrying out extrusion forming under the conditions of extrusion speed of 5.2 m/min, extrusion ratio of 85 and die temperature of 435 ℃, and then cooling the aluminum alloy cast ingot to room temperature through water;

F. aging treatment, namely heating the extruded aluminum profile frame to 1605 ℃, aging for 7 hours, and cooling along with a furnace;

G. coating: and (3) coating an aluminum alloy coating on the surface of the aluminum profile frame, and drying.

The aluminum alloy comprises the following components in percentage by weight: 0.007% of Si, 1.28% of Fe1, 1.95% of Mn1, 0.32% of Zns, 1.41% of Mgs, 0.025% of Y, 0.012% of Tis, and the balance of Al and inevitable impurities.

And in the step B, argon with the purity of 99.9 percent is adopted to blow and refine the aluminum alloy liquid in the furnace for 30min, and the aluminum alloy liquid is kept still for 12min after slagging off.

In the step C, the temperature of the homogenization treatment is 375 ℃, and the heat preservation time is 6.5 h.

The aluminum alloy coating comprises the following components in percentage by weight: 100 parts of acrylic emulsion, 25 parts of melamine, 1.5 parts of fluorine-containing organic silicon/silicon dioxide hybrid sol, 0.045 part of defoaming agent, 3.5 parts of dispersing agent, 105 parts of deionized water, 0.7 part of flatting agent, 0.2 part of film-forming assistant and KH 5500.35 parts of cross-linking agent.

The dry film thickness of the aluminum alloy coating is 0.28 mm.

Example 2

A production method of an aluminum material type frame for a corrosion-resistant LED electronic screen comprises the following steps:

A. preparing materials: preparing the components of the aluminum alloy for preparing the aluminum profile frame according to the weight percentage;

B. casting: adding the prepared aluminum alloy raw material into a smelting furnace, uniformly mixing, smelting into liquid aluminum alloy, and performing standing, refining, slagging off, online degassing and filtering to melt and cast the liquid aluminum alloy into an aluminum alloy cast rod;

C. homogenizing: homogenizing the aluminum alloy cast rod in a homogenizing furnace, and cooling the aluminum alloy cast rod discharged from the furnace to room temperature by strong wind;

D. surface treatment of the cast rod: sawing the homogenized aluminum alloy cast rod into 1.2m short aluminum alloy cast ingots, and turning the as-cast surface skin of the surface layer of the short aluminum alloy cast ingot by using a lathe, wherein the turning thickness is 8 mm;

E. extruding: heating the aluminum alloy cast ingot to 460 ℃, carrying out extrusion forming under the conditions of extrusion speed of 5 m/min, extrusion ratio of 90 and mold temperature of 430 ℃, and then cooling the aluminum alloy cast ingot to room temperature through water;

F. aging treatment, namely heating the extruded aluminum profile frame to 170 ℃, aging for 6 hours, and cooling along with a furnace;

G. coating: and (3) coating an aluminum alloy coating on the surface of the aluminum profile frame, and drying.

The aluminum alloy comprises the following components in percentage by weight: 0.008% of Si, 1.2% of Fe1.2%, 2.2% of Mn2, 0.25% of Zn1.45%, 0.022% of Y, 0.015% of Ti0, and the balance of Al and inevitable impurities.

And in the step B, argon with the purity of 99.9 percent is adopted to blow and refine the aluminum alloy liquid in the furnace for 25min, and the furnace is kept still for 15min after slagging off.

In the step C, the temperature of the homogenization treatment is 350 ℃, and the heat preservation time is 8 h.

The aluminum alloy coating comprises the following components in percentage by weight: 100 parts of acrylic emulsion, 30 parts of melamine, 1 part of fluorine-containing organic silicon/silicon dioxide hybrid sol, 0.05 part of defoaming agent, 3 parts of dispersing agent, 120 parts of deionized water, 0.5 part of flatting agent, 0.3 part of film-forming assistant and KH 5500.3 parts of cross-linking agent.

The dry film thickness of the aluminum alloy coating is 0.25 mm.

Example 3

A production method of an aluminum material type frame for a corrosion-resistant LED electronic screen comprises the following steps:

A. preparing materials: preparing the components of the aluminum alloy for preparing the aluminum profile frame according to the weight percentage;

B. casting: adding the prepared aluminum alloy raw material into a smelting furnace, uniformly mixing, smelting into liquid aluminum alloy, and performing standing, refining, slagging off, online degassing and filtering to melt and cast the liquid aluminum alloy into an aluminum alloy cast rod;

C. homogenizing: homogenizing the aluminum alloy cast rod in a homogenizing furnace, and cooling the aluminum alloy cast rod discharged from the furnace to room temperature by strong wind;

D. surface treatment of the cast rod: sawing the homogenized aluminum alloy cast rod into a short aluminum alloy cast ingot of 1.0m, and turning the cast surface of the surface layer of the short aluminum alloy cast ingot by using a lathe, wherein the turning thickness is 10 mm;

E. extruding: heating the aluminum alloy cast ingot to 450 ℃, carrying out extrusion forming under the conditions of extrusion speed of 6 m/min, extrusion ratio of 80 and mold temperature of 440 ℃, and then cooling the aluminum alloy cast ingot to room temperature through water;

F. aging treatment, namely heating the extruded aluminum profile frame to 160 ℃, aging for 8 hours, and cooling along with a furnace;

G. coating: and (3) coating an aluminum alloy coating on the surface of the aluminum profile frame, and drying.

The aluminum alloy comprises the following components in percentage by weight: 0.005% of Si, 1.5% of Fe1, 1.8% of Mn1, 0.35% of Zn0, 1.35% of Mg1, 0.035% of Y, 0.008% of Ti0, and the balance of Al and inevitable impurities.

And in the step B, argon with the purity of 99.9 percent is adopted to blow and refine the aluminum alloy liquid in the furnace for 35min, and the furnace is kept still for 10min after slagging off.

In the step C, the temperature of the homogenization treatment is 400 ℃, and the heat preservation time is 6 hours.

The aluminum alloy coating comprises the following components in percentage by weight: 100 parts of acrylic emulsion, 20 parts of melamine, 2 parts of fluorine-containing organic silicon/silicon dioxide hybrid sol, 0.02 part of defoaming agent, 5 parts of dispersing agent, 80 parts of deionized water, 1 part of flatting agent, 0.1 part of film-forming assistant and KH 5500.5 parts of cross-linking agent.

The dry film thickness of the aluminum alloy coating is 0.32 mm.

Comparative example 1

The element Y in example 1 was removed, and the rest of the formulation and production method were unchanged.

According to the national standard GB/T16865-2013 sample and method for tensile test of wrought aluminum, magnesium and alloy processing products thereof, the aluminum alloys prepared in the examples and the comparative examples are processed into standard tensile samples, the standard tensile samples are stretched on an HGF-500 type electronic tensile testing machine at room temperature, the tensile rate is 2 mm/min, the tensile strength and the elongation after fracture of the aluminum alloy are detected, and the detection results are shown in Table 1.

Table 1: data on the test of the aluminum profiles prepared in examples 1 to 3 and comparative example 1;

	tensile strength of 25 ℃ and Mpa	Average size of crystal grains	Corrosion resistance	Film thickness mm
					Example 1	537	30μm	EA	28
Example 2	532	31μm	EA	25
					Example 3	544	30μm	EA	32
Comparative example 1	369	59μm	EC	28

According to the test data, the aluminum material type frame for the corrosion-resistant LED electronic screen has finer grains and better corrosion resistance due to the addition of the element Y.

Comparative example 2

The element Y in the embodiment 1 is replaced by the element lanthanum, the element cerium and the element scandium respectively, and after detection, the tensile strength, the average grain size and the corrosion resistance of the aluminum alloy are not obviously changed compared with the comparative example 1, so that the characteristic of adding the element Y in the invention is not considered to be the common property of rare earth elements.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.