阅读说明：本技术 一种3004铝合金瓶盖料及其制备方法 (3004 aluminum alloy bottle cap material and preparation method thereof ) 是由 赵江涛 李浩杰 孙志远 乔文杰 于 2020-07-31 设计创作，主要内容包括：本发明公开了一种3004铝合金瓶盖料及其制备方法。包含有以下重量比的元素：Si 0.2-0.25％,Fe 0.4-0.5％,Cu 0.06-0.1％,Mn 0.8-0.9％,Mg 0.9-1.0％,Cr 0.05％,Zn 0.05％,Ti 0.015-0.02％,余量为Al。将原料废料依次进行熔炼、铸锭、锯头、铣面、均热加热、热粗轧、热精轧、冷轧、一次中间退火、箔轧半成品、二次中间退火、箔轧成品、低温稳定化处理,得到3004铝合金瓶盖料。本发明以回收废料为主要原料,通过对其创新性的加工创造,所得瓶盖料的抗拉强度、屈服强度、延伸率均得到明显提高,良好的制耳率和延伸率能带来优异的冲压效果,较高的抗拉强度使瓶盖料产品的扭断力更好。有效解决了现有国内市场中瓶盖料强度低,无法适用于含气类饮料瓶盖的问题。应用范围更加广泛,减少了资源浪费,避免了对环境的污染。(The invention discloses a 3004 aluminum alloy bottle cap material and a preparation method thereof. Comprises the following elements in percentage by weight: 0.2 to 0.25 percent of Si, 0.4 to 0.5 percent of Fe, 0.06 to 0.1 percent of Cu, 0.8 to 0.9 percent of Mn, 0.9 to 1.0 percent of Mg, 0.05 percent of Cr, 0.05 percent of Zn, 0.015 to 0.02 percent of Ti, and the balance of Al. And sequentially carrying out smelting, ingot casting, head sawing, face milling, soaking heating, hot rough rolling, hot finish rolling, cold rolling, primary intermediate annealing, foil rolling semi-finished product, secondary intermediate annealing, foil rolling finished product and low-temperature stabilization treatment on the raw material waste to obtain the 3004 aluminum alloy bottle cover material. According to the invention, the recycled waste is used as a main raw material, and innovative processing and creation are carried out on the recycled waste, so that the tensile strength, the yield strength and the elongation of the obtained bottle cap material are obviously improved, the excellent stamping effect can be brought by the good lug making rate and the elongation, and the higher tensile strength enables the twisting-off force of the bottle cap material product to be better. Effectively solves the problems that the bottle cap material in the existing domestic market has low strength and can not be suitable for the bottle caps of gas-containing beverages. The application range is wider, the resource waste is reduced, and the environmental pollution is avoided.)

1. The 3004 aluminum alloy bottle cap material is characterized by comprising the following alloy elements in percentage by weight: si: 0.2-0.25%, Fe: 0.4-0.5%, Cu: 0.06-0.1%, Mn: 0.8-0.9%, Mg: 0.9-1.0%, Cr: 0.05%, Zn: 0.05%, Ti: 0.015-0.02% and Al as the rest.

2. A method of making a 3004 aluminum alloy bottle cap material according to claim 1, comprising the steps of: sequentially carrying out smelting, ingot casting, head sawing, face milling, soaking heating, hot rough rolling, hot finish rolling, cold rolling, primary intermediate annealing, primary cold foil rolling, secondary intermediate annealing, secondary foil rolling and low-temperature stabilization treatment on the prepared raw materials to obtain a 3004 aluminum alloy bottle cover material;

smelting the recovered waste material for 5-8 hours at the temperature of 710-765 ℃ in the smelting process, and detecting and analyzing that all components of the recovered waste material meet the requirements of the 3004 aluminum alloy bottle cap material in the smelting process; and introducing the smelted melt into a standing furnace for refining at the temperature of 720-740 ℃, standing after refining is finished, and casting by using a casting machine at the temperature of 690-715 ℃ after standing is finished to form an aluminum alloy ingot.

3. A preparation method according to claim 2, characterized in that the mass ratio of the aluminum ingot to the materials is 8-20%, and the mass ratio of the waste to the materials is 80-92%.

4. The production method according to claim 2, wherein the soaking heating is: placing the aluminum alloy ingot after surface milling in a soaking pit furnace, controlling the furnace gas temperature of the soaking pit furnace to be 620 ℃, and preserving heat for 10-12 hours under the condition when the aluminum alloy ingot reaches 590-610 ℃; and after the heat preservation is finished, when the temperature of the aluminum alloy ingot is reduced to 490-510 ℃, preserving the heat for 2 hours under the condition, and discharging the aluminum alloy ingot after the heat preservation is finished.

5. The preparation method as claimed in claim 2, wherein the rolling passes of the hot rough rolling are 17-19 passes, and the temperature at the completion of the rolling is controlled to be 390-450 ℃; the rolling pass of the hot finish rolling is 4 passes, the pressure of compressed air during rolling is 0.2-0.4MPa, and the final rolling temperature after the hot finish rolling is 315-.

6. The production method according to claim 5, wherein the emulsion pressure and the concentration are 0.4 to 0.6MPa and 5 to 6%, respectively, in the rough hot rolling and the finish hot rolling.

7. The production method according to claim 2, wherein the cold rolling is performed in 3 passes;

preferably, the thickness of the first pass is 3.0mm, the thickness of the second pass is 1.8mm, and the thickness of the third pass is 1.2 mm.

8. The preparation method of claim 2, wherein the primary intermediate annealing and the secondary intermediate annealing are both performed with nitrogen protection, the furnace gas temperature is set to 460 ℃, the furnace gas temperature is set to 370 ℃ when the aluminum alloy ingot temperature reaches 350 ℃, the temperature is kept for 5 hours, and the aluminum alloy ingot is discharged for natural cooling after the temperature is kept.

9. The method according to claim 2, wherein the low-temperature stabilization treatment is: and (3) heating the aluminum alloy coiled material subjected to secondary foil rolling by using a nitrogen annealing furnace, wherein the constant temperature of furnace gas is 340 ℃, the temperature of the aluminum alloy coiled material is raised to 225 ℃, the temperature of the furnace gas is changed to 315 ℃, heat preservation is carried out at the temperature, and the aluminum alloy coiled material is discharged when the temperature is raised to 230 ℃.

Technical Field

The invention belongs to the technical field of nonferrous metal processing. In particular to a 3004 aluminum alloy bottle cap material and a preparation method thereof.

Background

Common materials of the existing bottle cap material products comprise PET/PE plastic caps, aluminum alloy caps, aluminum-plastic composite caps and the like. Among these materials, the aluminum bottle cap material has the advantages of easy processing, easy recovery, light weight, beautiful appearance, environmental protection, etc. Therefore, a large amount of bottle caps are produced by adopting aluminum products at present, 8011 aluminum alloy is mainly used in the market to produce gasless wine and pharmaceutical bottle cap materials, but most of the bottle cap materials prepared from the alloy have the strength below 165Mpa, the bottle cap materials cannot meet the filling requirement of gassy beverages with high internal pressure, and the alloy has higher rejection rate due to stricter processing conditions on the ear-making rate index. Along with the mass production of aluminum alloy bottle caps, aluminum resources are developed and utilized in a large quantity, but the generated waste materials are not recycled well. On the other hand, along with the great improvement of the quality of life and the wider and wider application of aluminum canned beverages, the recycling of waste materials is a problem to be solved urgently. At present, the pop can waste in the recovered waste accounts for a large part, and needs to be effectively solved urgently.

Disclosure of Invention

Aiming at the problems, the invention provides a 3004 aluminum alloy bottle cap material and a preparation method thereof. The bottle cap material with excellent performance and better use performance is prepared by taking the recycled waste material as the raw material.

The invention is realized by the following technical scheme

The 3004 aluminum alloy bottle cap material comprises the following alloy elements in percentage by weight: si: 0.2-0.25%, Fe: 0.4-0.5%, Cu: 0.06-0.1%, Mn: 0.8-0.9%, Mg: 0.9-1.0%, Cr: 0.05%, Zn: 0.05%, Ti: 0.015-0.02% and Al as the rest.

The preparation method of the 3004 aluminum alloy bottle cap material comprises the following steps: sequentially carrying out smelting, ingot casting, head sawing, face milling, soaking heating, hot rough rolling, hot finish rolling, cold rolling, primary intermediate annealing, primary cold foil rolling, secondary intermediate annealing, secondary foil rolling and low-temperature stabilization treatment on the prepared raw materials to obtain a 3004 aluminum alloy bottle cover material;

smelting the recovered waste material for 5-8 hours at the temperature of 710-765 ℃ in the smelting process, and in the smelting process, adjusting the contents of Fe, Mg, Mn, Ti and other components to ensure that the components meet the requirement of a 3004 aluminum alloy bottle cover material by adding an aluminum ingot (the purity is more than or equal to 99.5%), an aluminum-titanium-boron wire (Al-5Ti-1B, namely the mass percentage of Ti in the aluminum-titanium-boron wire is 5%, the mass percentage of B is 1%, and the balance is Al.), a magnesium ingot (the purity is more than or equal to 99.5%), an iron additive (the purity is 75%) and a manganese additive (the purity is 75%) into the melt through detection and analysis; introducing the smelted melt into a standing furnace for refining at the temperature of 720-740 ℃, and standing for half an hour after the refining is finished to finish the smelting;

then the melted aluminum alloy enters a primary filtering device through a standing furnace guide furnace, is filtered by the primary filtering device and then is led into an online degassing device, is degassed by the online degassing device and then is led into a secondary filtering device for filtering, and is cast into an aluminum alloy ingot by a casting machine under the condition of 690 and 715 ℃ after the filtering is finished;

preferably, the total time for casting at 690-715 ℃ is 2.0-3.0 hours; the precision of a filter plate of the primary filtering device is 30PPi, online degassing is carried out on the aluminum alloy melt by adopting high-purity argon after the primary filtering, the rotating speed of a graphite rotor is 450r/min during online degassing, and the hydrogen content of the aluminum alloy material obtained after the online degassing is less than or equal to 0.15ml/100 gAl; and introducing a secondary filtering device after online degassing, wherein the precision of a filtering plate of the secondary filtering device is 50 PPi.

Further, the mass ratio of the aluminum ingot to the materials is 8-20%, and the mass ratio of the waste to the materials is 80-92%.

Further, the soaking heating is as follows: placing the aluminum alloy ingot after surface milling in a soaking pit furnace, controlling the furnace gas temperature of the soaking pit furnace to be 620 ℃, and preserving heat for 10-12 hours under the condition when the aluminum alloy ingot reaches 590-610 ℃; and after the heat preservation is finished, when the temperature of the aluminum alloy ingot is reduced to 490-510 ℃, preserving the heat for 2 hours under the condition, and discharging the aluminum alloy ingot after the heat preservation is finished.

Further, the rolling pass of the hot rough rolling is 17-19 passes, and the temperature is controlled to be 390-450 ℃ when the rolling is finished; the rolling pass of the hot finish rolling is 4 passes, the pressure of compressed air during rolling is 0.2-0.4MPa, and the finish rolling temperature after the hot finish rolling is 315-330 ℃ (the thickness of the aluminum alloy plate after the rolling is finished is preferably 5.0 mm).

Furthermore, the emulsion pressure and the concentration of the emulsion used in the hot rough rolling and the hot finish rolling are both 0.4-0.6MPa and 5-6 percent respectively.

Further, cold rolling was performed for 3 passes; preferably, the thickness of the first pass is 2.0mm, the thickness of the second pass is 1.2mm, and the thickness of the third pass is 0.6 mm.

Further, carrying out intermediate annealing by adopting nitrogen protection in both the primary intermediate annealing and the secondary intermediate annealing, setting the furnace gas temperature at 460 ℃, changing the furnace gas temperature to 370 ℃ when the aluminum alloy ingot temperature reaches 350 ℃, preserving heat for 5 hours at the temperature, and discharging and naturally cooling after the heat preservation is finished.

Further, the low-temperature stabilizing treatment is as follows: and (3) heating the aluminum alloy coiled material subjected to secondary foil rolling by using a nitrogen annealing furnace, wherein the constant temperature of furnace gas is 340 ℃, the temperature of the aluminum alloy coiled material is raised to 225 ℃, the temperature of the furnace gas is changed to 315 ℃, heat preservation is carried out at the temperature, and the aluminum alloy coiled material is discharged when the temperature is raised to 230 ℃.

Compared with the prior art, the invention has the following positive beneficial effects

The 3004 aluminum alloy bottle cap material is obtained by using the recycled waste as a main raw material and innovatively processing and creating the raw material, the tensile strength, the yield strength and the elongation of the bottle cap material are obviously improved, the earing rate is more stable, the good earing rate and the elongation can bring excellent stamping effect, the higher tensile strength enables the bottle cap material product to have better twisting-breaking force, the bottle cap material can be safely contained for beverages with higher gas content and the like, and the application range is wider. And a large amount of recovered waste materials can be used as raw materials, so that the production cost is reduced, the resource waste is reduced, and the pollution to the environment is avoided.

The 3004 bottle cap material produced by the technical scheme of the invention can effectively solve the problems that the bottle cap material in the existing domestic market has low strength, cannot be suitable for gas-containing beverage bottle caps, has poor torsional fracture and has dull sound when the caps are opened. As can be seen from the following table 1, the aluminum alloy bottle cap material prepared by the invention has various performances superior to those of the aluminum alloy bottle cap material in the prior art, and has better social and economic benefits by taking waste materials as raw materials.

Table 1 data for a 3004 aluminum alloy cap material of the present invention compared to 8011 cap material are as follows:

Detailed Description

The present invention will be described in more detail with reference to the following specific examples to facilitate the understanding of the technical solutions of the present invention, but the present invention is not limited to the scope of the present invention.