5A12 aluminum alloy hot-rolled blank and production method thereof
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A production method, 5A12 technology, applied in the field of 5A12 aluminum alloy hot-rolled billet and its production, can solve the problems of not being able to apply large-sized parts and weldments, and small-sized parts
Active Publication Date: 2021-12-24
HENAN MINGTAI AL INDUSTRIAL CO LTD +1
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Small-diameter round rod ingots can be extruded into parts of various shapes by ordinary extruders, but the disadvantage is that the parts produced are small in size and cannot b
Method used
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Embodiment 1
[0039] The 5A12 aluminum alloy hot-rolled blank of the present invention is represented by mass percentage, and the aluminum alloy hot-rolled blank contains the following alloy elements:
[0040]Si 0.201%, Cu 0.031%, Mg 8.802%, Zn 0.101%, Mn 0.702%, Ti 0.101%, Ni 0.060%, Fe 0.150%, other impurities 0.030%, and the balance is Al.
Embodiment 2
[0042] The production method of the 5A12 aluminum alloy hot-rolled blank described in Example 1 of the present invention, the detailed steps of the production method are as follows:
[0043] a. Melting: Use pure aluminum ingots and pure magnesium ingots as raw materials for batch smelting. During the smelting process, control the smelting temperature to 730-750°C, and the smelting holding time is 25 minutes; add intermediate alloys Al-20Si, Al-50Cu, Al during the smelting process -20Mn, Al-5Ni and Al-5Ti-B are batched, and the batching temperature is 730-740 ° C, so that the composition of the alloy liquid obtained by smelting meets the alloy element composition of the billet described in Example 1;
[0044] b. Refining: Refining the alloy liquid obtained in step a. During the refining process, the temperature is controlled at 720-725° C., and the refining time is 30 minutes; after refining, it is left to stand for 30 minutes;
[0045] c. Casting: cast the alloy liquid obtaine...
Embodiment 3
[0065] The 5A12 aluminum alloy hot-rolled blank of the present invention is represented by mass percentage, and the aluminum alloy hot-rolled blank contains the following alloy elements:
[0066] Si 0.221%, Cu 0.022%, Mg 8.668%, Zn 0.113%, Mn 0.689%, Ti 0.088%, Ni 0.051%, Fe 0.110%, other impurities 0.030%, and the balance is Al.
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Abstract
The invention discloses a 5A12 aluminum alloy hot-rolled blank and a production method thereof. According to the method, pure aluminum ingots and pure magnesium ingots are used as raw materials for burdening and smelting, obtained alloy liquid is refined, standing is conducted after refining, the alloy liquid obtained after standing is cast, and an aluminum alloy cast ingot is obtained; the obtained 5A12 aluminum alloy cast ingot is subjected to three-stage homogenization treatment; then the surface of the cast ingot is milled, and treatment is conducted by adopting an acetic acid water-air combined impurity removal method after surface milling; and the treated cast ingot is sequentially subjected to homogeneous heating, hot rough rolling and hot finish rolling, and finally the 5A12 aluminum alloy hot-rolled blank with the product thickness being 8 mm is obtained. By means of the method, the large-specification 5A12 aluminum alloy hot-rolled plate blank with the width of 1200 mm-1700 mm can be obtained, and the product has the advantages of being good in surface quality, high in strength, good in plasticity, free of air holes and shrinkage cavities in the blank and the like; and the problems that the requirement for equipment is high and the hot rolling technology is complex in existing large-specification 5A12 aluminum alloy plate production are solved.
Description
1. Technical field: [0001] The invention belongs to the technical field of aluminum alloys and their preparation, and in particular relates to a 5A12 aluminum alloy hot-rolled blank and a production method thereof. 2. Background technology: [0002] 5A12 aluminum alloy is a 5-series aluminum alloy with high magnesium content. It is a non-heat-treatable alloy. It has the characteristics of high strength, good corrosion resistance and machinability, good anodized surface quality, good arc welding performance and good corrosion resistance. 5A12 alloy is widely used in ships, aircraft welding parts, subway light rail, missile parts, bulletproof armor and other fields. In practical application, 5A12 alloy is mainly extruded profile, and the raw material of extruded profile is generally a round rod-shaped ingot with a small diameter, relatively simple casting, easy to control the composition, and difficult to crack when cast. Small-diameter round rod ingots can be extruded into p...
Claims
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