Aluminum alloy material of two-piece can body of pop-top can and production method for aluminum alloy material

Abstract

The invention an aluminum alloy material of a two-piece can body of a pop-top can and a production method for the aluminum alloy material. The production process comprises fusion casting, saw cutting, surface milling, soaking, (1+4) hot continuous rolling, three-rack cold continuous rolling and trimming, wherein smelting molten aluminum consists of the following alloy elements in percentage by weight: 0.170-0.300% of Si, 0.350-0.500% of Fe, 0.100-0.250% of Cu, 0.800-0.920% of Mn, 1.100-1.280% of Mg, less than or equal to 0.03% of Cr, less than or equal to 0.05% of Zn, less than or equal to 0.02% of Ti, less than or equal to 0.02% of single impurity, less than or equal to 1.10% of total impurities, and the balance of Al. According to the production method for the two-piece can body material of the pop-top can, the production flow is shortened, the production efficiency is improved, the yield is increased, performances of the aluminum material are better than those of an aluminum material produced by a single rack, and the probability that surface quality defects occur is reduced.

Description

technical field

[0001] The invention relates to the field of aluminum alloy manufacturing, in particular to an aluminum alloy material for a can body of an easy-pull 2-piece can and a production method thereof. Background technique

[0002] 3104 aluminum alloy is the most commonly used material for the production of 2-piece cans. Because of its long shelf life, 100% recyclability, easy portability, easy transportation, and easy handling, it has good development prospects. With the thinning of the aluminum can body, higher requirements are placed on the mechanical properties of the can body aluminum; at the same time, the can industry continues to develop, the demand for can body aluminum is increasing, and the delivery cycle is getting shorter and shorter. In order to improve the utilization rate of materials and improve production efficiency, the technology of thinning the finished thickness of 3104 aluminum alloy strips and reducing the number of rolling passes have become...

Examples

Embodiment 1

[0021] The alloy state of the aluminum body of the easy-pull 2-piece can body described in this example: 3104H19; the thickness of the finished product: 0.26mm; the production process includes: melting and casting→sawing→homogenization treatment→hot rolling→cold continuous rolling→edge trimming→ Packaging, the specific process parameters are as follows:

[0022] casting

[0023] The mass percentage of the chemical composition of molten aluminum is: Si: 0.170, Fe: 0.350, Cu: 0.100, Mn: 0.800, Mg: 1.280, Cr: 0.03, Zn: 0.041, Ti: 0.02, single ≤ 0.02%, total ≤ 0.10 %; the rest is Al; the melting temperature is 760°C, the refining temperature is 750°C, and the casting temperature is 680°C.

[0024] Homogenization (heating)

[0025] The ingot is kept at 570-606°C for 10-15 hours, then turned to 480-505°C for 2-5 hours.

[0026] hot rolled

[0027] Use 1+4 hot rolling production line, one reversible roughing mill plus one four-stand hot continuous rolling production line; hot rou...

Embodiment 2

[0040] The alloy state of the aluminum body of the easy-pull 2-piece can body described in this embodiment: 3104H19; 0.24mm; its production process includes: melting and casting→sawing and milling→homogenization treatment→hot rolling→cold continuous rolling→edge trimming→packaging, specifically The process parameters are as follows:

[0041] casting

[0042] The mass percentage of the chemical composition of molten aluminum water is: Si: 0.300%, Fe: 0.500%, Cu: 0.250%, Mn: 0.920%, Mg: 1.100%, Cr: 0.015%, Zn: 0.05%, Ti: 0.017%, Single ≤0.02%, total ≤0.10%; the rest is Al; the melting temperature is 720°C, the refining temperature is 720°C, and the casting temperature is 710°C.

[0043] homogenization heating

[0044] The ingot is kept at 570-606°C for 10-15 hours, then turned to 480-505°C for 2-5 hours.

[0045] hot rolled

[0046] Use 1+4 hot rolling production line, one reversible roughing mill plus one four-stand hot continuous rolling production line; hot roughing mill ...

Embodiment 3

[0058] The alloy state of the aluminum body of the easy-pull 2-piece can body described in this example: 3104H19; the thickness of the finished product: 0.38mm; the production process includes: melting and casting→sawing→homogenization treatment→hot rolling→cold continuous rolling→edge trimming→ Packaging, the specific process parameters are as follows:

[0059] casting

[0060] The mass percentage of the chemical composition of molten aluminum is: Si: 0.237, Fe: 0.429, Cu: 0.225, Mn: 0.896, Mg: 1.260, Cr: 0.026, Zn: 0.041, Ti: 0.017, single ≤ 0.02%, total ≤ 0.10 %; the rest is Al; the melting temperature is 755°C, the refining temperature is 728°C, and the casting temperature is 684°C.

[0061] Homogenization (heating)

[0062] The ingot is kept at 570-606°C for 10-15 hours, then turned to 480-505°C for 2-5 hours.

[0063] hot rolled

[0064] Use 1+4 hot rolling production line, one reversible roughing mill plus one four-stand hot continuous rolling production line; hot r...

technical field

[0001] The invention relates to the field of aluminum alloy manufacturing, in particular to an aluminum alloy material for a can body of an easy-pull 2-piece can and a production method thereof. Background technique

[0002] 3104 aluminum alloy is the most commonly used material for the production of 2-piece cans. Because of its long shelf life, 100% recyclability, easy portability, easy transportation, and easy handling, it has good development prospects. With the thinning of the aluminum can body, higher requirements are placed on the mechanical properties of the can body aluminum; at the same time, the can industry continues to develop, the demand for can body aluminum is increasing, and the delivery cycle is getting shorter and shorter. In order to improve the utilization rate of materials and improve production efficiency, the technology of thinning the finished thickness of 3104 aluminum alloy strips and reducing the number of rolling passes have become...

Examples

Embodiment 1

[0021] The alloy state of the aluminum body of the easy-pull 2-piece can body described in this example: 3104H19; the thickness of the finished product: 0.26mm; the production process includes: melting and casting→sawing→homogenization treatment→hot rolling→cold continuous rolling→edge trimming→ Packaging, the specific process parameters are as follows:

[0022] casting

[0023] The mass percentage of the chemical composition of molten aluminum is: Si: 0.170, Fe: 0.350, Cu: 0.100, Mn: 0.800, Mg: 1.280, Cr: 0.03, Zn: 0.041, Ti: 0.02, single ≤ 0.02%, total ≤ 0.10 %; the rest is Al; the melting temperature is 760°C, the refining temperature is 750°C, and the casting temperature is 680°C.

[0024] Homogenization (heating)

[0025] The ingot is kept at 570-606°C for 10-15 hours, then turned to 480-505°C for 2-5 hours.

[0026] hot rolled

[0027] Use 1+4 hot rolling production line, one reversible roughing mill plus one four-stand hot continuous rolling production line; hot rou...

Embodiment 2

[0040] The alloy state of the aluminum body of the easy-pull 2-piece can body described in this embodiment: 3104H19; 0.24mm; its production process includes: melting and casting→sawing and milling→homogenization treatment→hot rolling→cold continuous rolling→edge trimming→packaging, specifically The process parameters are as follows:

[0041] casting

[0042] The mass percentage of the chemical composition of molten aluminum water is: Si: 0.300%, Fe: 0.500%, Cu: 0.250%, Mn: 0.920%, Mg: 1.100%, Cr: 0.015%, Zn: 0.05%, Ti: 0.017%, Single ≤0.02%, total ≤0.10%; the rest is Al; the melting temperature is 720°C, the refining temperature is 720°C, and the casting temperature is 710°C.

[0043] homogenization heating

[0044] The ingot is kept at 570-606°C for 10-15 hours, then turned to 480-505°C for 2-5 hours.

[0045] hot rolled

[0046] Use 1+4 hot rolling production line, one reversible roughing mill plus one four-stand hot continuous rolling production line; hot roughing mill ...

Embodiment 3

[0058] The alloy state of the aluminum body of the easy-pull 2-piece can body described in this example: 3104H19; the thickness of the finished product: 0.38mm; the production process includes: melting and casting→sawing→homogenization treatment→hot rolling→cold continuous rolling→edge trimming→ Packaging, the specific process parameters are as follows:

[0059] casting

[0060] The mass percentage of the chemical composition of molten aluminum is: Si: 0.237, Fe: 0.429, Cu: 0.225, Mn: 0.896, Mg: 1.260, Cr: 0.026, Zn: 0.041, Ti: 0.017, single ≤ 0.02%, total ≤ 0.10 %; the rest is Al; the melting temperature is 755°C, the refining temperature is 728°C, and the casting temperature is 684°C.

[0061] Homogenization (heating)

[0062] The ingot is kept at 570-606°C for 10-15 hours, then turned to 480-505°C for 2-5 hours.

[0063] hot rolled

[0064] Use 1+4 hot rolling production line, one reversible roughing mill plus one four-stand hot continuous rolling production line; hot r...

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