A method for improving production efficiency of 7XXX aluminum alloy plate solid solution

Abstract

A method for solid solution of 7XXX aluminum alloy plates to improve production efficiency. The purpose of the present invention is to shorten the solid solution heating time of 7XXX aluminum alloy plates, improve production efficiency, reduce production costs, and solve the problem of long equipment occupancy time in the solid solution process. Method: The furnace temperature is raised to 10°C to 50°C above the solid solution temperature, and then the rolled 7XXX aluminum alloy plates are charged into the furnace for heating and heat preservation. The plate heating time can be shortened by 29% to 43% according to different thicknesses, and then the plate is water-cooled out of the furnace. The furnace does not cool down, and a continuous furnace loading method is adopted. Then, the next furnace of 7XXX aluminum alloy plates is solid solutioned in the same steps; compared with the original process, the performance and organization of the 7XXX aluminum alloy obtained are the same as the original process, but the plate solid solution heating time is greatly shortened, the production efficiency is accelerated, and the production cost is reduced. The present invention is applied to the field of aluminum alloy plate processing technology.

Description

Technical Field

[0001] The invention relates to a 7XXX aluminum alloy plate solid solution method for improving production efficiency. Background Art

[0002] With the continuous development of my country's automobile industry, high-speed rail, aerospace and other industrial fields, the demand for aluminum alloy materials continues to increase. As early as the 1920s, foreign countries developed high-strength aluminum alloys and applied them in industry. With the continuous development of technology, the toughness, strength and corrosion resistance of aluminum alloys are getting higher and higher, and the proportion of impurities and trace elements is becoming more and more reasonable. 7XXX series aluminum alloy sheets have been produced in my country since the 1960s. After more than 50 years of development, the main technical indicators such as corrosion resistance and elongation have been significantly improved; as a high-end alloy for aerospace, the demand for 7XXX series aluminum alloy sheets is increasing, and there is an urgent need to improve production efficiency.

[0003] In recent years, the proportion of high-end alloys produced by aluminum alloy processing plants has become increasingly larger, and improving production efficiency has become a major trend; secondly, in response to the increasingly competitive market and in order to serve more customers, increasing output and speeding up production efficiency can increase production benefits and market competitiveness. Therefore, the solid solution process optimization of 7XXX series aluminum alloy plates, including differential temperature heating and continuous furnace loading of ultra-thick plates, is carried out to ensure the full supply of high-end alloy products, achieve production and maximize benefits, and enhance the market competitiveness of key products. It is of great significance. Summary of the invention

[0004] The purpose of the present invention is to shorten the solid solution heating time of 7XXX aluminum alloy plates, increase production efficiency, reduce production costs, solve the problem of long equipment occupancy time in the solid solution process, and provide a 7XXX aluminum alloy plate solid solution method with improved production efficiency.

[0005] The present invention provides a 7XXX aluminum alloy plate solid solution method for improving production efficiency, which is carried out according to the following steps:

[0006] 1. Raise the furnace temperature to 10-50℃ higher than the solution temperature, and then push the rolled 7XXX aluminum alloy plate into the furnace for insulation. When the plate thickness is less than 30mm, the insulation time is 8-12min; when the plate thickness is 30-70mm, the insulation time is 12-18min; when the plate thickness is greater than 70mm, the insulation time is 18-30min; then adjust the furnace temperature back to the solution temperature, and heat and keep warm, then cool it out of the furnace with water to complete the solution of the plate;

[0007] 2. Repeat step 1 and carry out continuous production by continuous furnace loading.

[0008] Beneficial effects of the present invention:

[0009] 1. The present invention provides a solid solution method for 7XXX aluminum alloy plates with improved production efficiency, which shortens the solid solution heating time of 7XXX aluminum alloy plates. The plate heating time can be shortened by 29% to 43%, and each device can produce an average of 30 to 50 more furnaces of the product 7XXX aluminum alloy plates throughout the year.

[0010] 2. The present invention provides a 7XXX aluminum alloy plate solution treatment method for improving production efficiency. The method adopts a continuous furnace loading method, saves cooling time, shortens the solution treatment time by about 6000 minutes throughout the year, improves production efficiency, reduces production costs, and solves the problem of long equipment occupancy time in the solution treatment process.

[0011] The present invention can obtain a 7XXX aluminum alloy plate solid solution method with improved production efficiency. DETAILED DESCRIPTION

[0012] The technical solution of the present invention is not limited to the specific implementation modes listed below, but also includes any combination of the specific implementation modes.

[0013] Specific implementation method 1: This implementation method is a 7XXX aluminum alloy plate solid solution method for improving production efficiency, which is carried out according to the following steps:

[0014] 1. Raise the furnace temperature to 10-50℃ higher than the solution temperature, and then push the rolled 7XXX aluminum alloy plate into the furnace for insulation. When the plate thickness is less than 30mm, the insulation time is 8-12min; when the plate thickness is 30-70mm, the insulation time is 12-18min; when the plate thickness is greater than 70mm, the insulation time is 18-30min; then adjust the furnace temperature back to the solution temperature, and heat and keep warm, then cool it out of the furnace with water to complete the solution of the plate;

[0015] 2. Repeat step 1 and carry out continuous production by continuous furnace loading.

[0016] Specific embodiment 2: This embodiment is different from the specific embodiment 1 in that step 1 is 15° C. higher than the solid solution temperature. The rest is the same as the specific embodiment 1.

[0017] Specific implementation method 3: This implementation method is different from specific implementation methods 1 or 2 in that step 1 is 20° C. higher than the solid solution temperature. The rest is the same as specific implementation methods 1 or 2.

[0018] Specific embodiment 4: This embodiment is different from specific embodiments 1 to 3 in that: step 1 is 30° C. higher than the solid solution temperature. The rest is the same as specific embodiments 1 to 3.

[0019] Specific embodiment 5: This embodiment is different from specific embodiments 1 to 4 in that step 1 is 50° C. higher than the solid solution temperature. The rest is the same as specific embodiments 1 to 4.

[0020] Specific implementation method 6: This implementation method is different from specific implementation methods 1 to 5 in that the temperature of the heating furnace is raised to 10 to 50° C. above the solution temperature after the plate is solid-solutionized. The rest is the same as specific implementation methods 1 to 5.

[0021] The following examples are used to verify the beneficial effects of the present invention:

[0022] Embodiment 1: This embodiment provides a solid solution method for 7XXX aluminum alloy plates to improve production efficiency, which is completed by the following steps:

[0023] The furnace temperature is raised to 520°C, and then the rolled 7XXX aluminum alloy plates with a thickness of 70 mm are pushed into the furnace. The plates are completely put into the heating furnace, the furnace door is closed, and the plates are kept warm for 18 minutes. The temperature is then changed to 470°C and kept warm for 90 minutes. After the insulation is completed, the plates are taken out of the furnace with water cooling, and the solid solution of one furnace of plates is completed. After that, the furnace is not cooled down, and the solid solution of the next furnace of 7XXX aluminum alloy plates is carried out in the same steps. Continuous production is carried out by continuous furnace loading, and a method for solid solution of 7XXX aluminum alloy plates with improved production efficiency is obtained.

[0024] In the control example, a 7XXX aluminum alloy plate with a thickness of 70 mm after rolling is pushed into the furnace. The plate is completely put into the heating furnace, the furnace door is closed, and the plate is kept at 470° C. for 181 minutes. After the end of the keeping, the plate is then water-cooled out of the furnace and the plate is solid-solutionized.

[0025] The first stage of solid solution insulation time for 7XXX aluminum alloy plates with a conventional thickness of 70mm is 181min, which is now 108min, saving 73min per furnace.

[0026] The structure and performance of the 7XXX aluminum alloy sheet prepared in this embodiment are the same as those of the 7XXX aluminum alloy sheet prepared in the control example.

Claims

1. A method for solid solution treatment of 7XXX aluminum alloy sheets to improve production efficiency, characterized in that This method is completed in the following steps:

1. Raise the furnace temperature to 10-50℃ higher than the solution temperature, and then push the rolled 7XXX aluminum alloy plate into the furnace for insulation. When the plate thickness is less than 30mm, the insulation time is 8-12min; when the plate thickness is 30-70mm, the insulation time is 12-18min; when the plate thickness is greater than 70mm, the insulation time is 18-30min; then adjust the furnace temperature back to the solution temperature, and heat and keep warm, then cool it out of the furnace with water to complete the solution of the plate; 2. Repeat step 1 and carry out continuous production by continuous furnace loading.

2. A method for solid solution treatment of 7XXX aluminum alloy sheets for improving production efficiency according to claim 1, characterized in that Step 1 is 15°C higher than the solution temperature.

3. A solid solution method for 7XXX aluminum alloy sheet with improved production efficiency according to claim 1, characterized in that Step 1 is 20°C higher than the solution temperature.

4. A method for solid solution treatment of 7XXX aluminum alloy sheets for improving production efficiency according to claim 1, characterized in that Step 1 is 30°C higher than the solution temperature.

5. A method for solid solution treatment of 7XXX aluminum alloy sheets for improving production efficiency according to claim 1, characterized in that After the solid solution of the plate is completed, the temperature of the heating furnace is raised to 10 to 50°C above the solid solution temperature.