Heat treatment process of 5050 aluminum alloy
An aluminum alloy and homogenization heat treatment technology, which is applied in the field of aluminum alloy processing, can solve the problems of reduced surface homogenization level, composition homogenization fluctuation, and high difficulty in process control, so as to improve selectivity, reduce processing difficulty of finished products, and improve equipment adaptive effect
Active Publication Date: 2021-01-05
XINJIANG JOINWORLD CO LTD
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AI Technical Summary
Problems solved by technology
[0005] The mature 5052 heat treatment technology in foreign countries is based on a series of processed hot-rolled billets provided by the "1+3 / 1+4" hot rolling mill, and adopts a relatively high-temperature homogenization and stabilization heat treatment process for hot-rolled finished products (more than 1070 aluminum alloys have more complete recrystallization temperatures), which inevitably induces the segregation behavior of Mg, which leads to the reduction of the surface uniformity level of the finished product oxidation; and there are large equipment investment, high difficulty in process control, and equipment The characteristics of poor versatility
However, when the 5-series aluminum alloy is processed with a single-stand hot rolling mill as the main processing equipment, it may induce uniform fluctuations in composition
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0058] The specific operation steps are as follows:
[0059] (1) Preparatory stage:
[0060] The thickness of the finished hot-rolled coil is 7.0-7.5mm, and the finishing temperature of the hot-rolled coil is controlled at 280-300°C; after the hot-rolled rolling is completed, the material is quickly transferred to the intelligent warehouse for forced cooling by the fan;
[0061] (2) Homogenization heat treatment:
[0062] After the hot-rolled billet is cold-rolled to a thickness of 3.5mm and cleaned, it is transferred to the nitrogen protection annealing process. After 3h, the temperature of the furnace was raised to 300°C and the heat preservation was started. After the material temperature reaches 270±5°C, the furnace gas temperature is set at 270°C and kept for 8 hours.
[0063] After the 8h holding time is up, turn off the heating system and turn on the fan in the furnace for forced cooling; wait for the temperature of the material to be ≤ 150°C before being released fr...
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Abstract
The invention relates to a heat treatment process of 5050 aluminum alloy. A heat treatment process of 5050 aluminum alloy comprises the following steps that (1) homogenization heat treatment is conducted, specifically, after a 5050 aluminum alloy coiled material obtained after cold rolling is cleaned, the temperature is rapidly increased to 270 + / -5 DEG C, heat preservation is conducted for 8 h, and then air cooling is conducted; (2) semi-finished product cold rolling and finished product cold rolling treatment are conducted on the 5050 aluminum alloy coiled material obtained after air cooling; and (3) stabilizing heat treatment is conducted, specifically, the 5050 aluminum alloy coiled material obtained after finished product cold rolling is cleaned, the temperature is rapidly increased to 200-220 DEG C, and then heat preservation is conducted for no more than 2 h; and then the temperature of 220-230 DEG C is kept for 2-3 h, and then air cooling is conducted. According to the heat treatment process of the 5050 aluminum alloy, the yield strength and the ductility of the 5050 aluminum alloy are improved to the same level as those of 5052, and it is ensured that the defects of chromatic aberration shading and the like caused by poor structure uniformity do not occur after the material is oxidized; and the heat treatment process has the characteristics of low heat treatment cost,high efficiency, high performance stability and the like.
Description
technical field [0001] The invention belongs to the technical field of aluminum alloy processing, and in particular relates to a heat treatment process for 5050 aluminum alloy. Background technique [0002] The widely used 5052 aluminum alloy for 3C electronic shell oxidation at home and abroad mainly has two usage states of H32 and O. The product has certain forming ability, good oxidation uniformity and strong resistance to deformation and damage. At the beginning of this century, with the rapid expansion of my country's 3C electronic products and related industries, through various means such as imitation and self-improvement, a number of aluminum processing enterprises represented by my country Aluminum System have formed the 3C electronic housing oxidation The complete product processing and application system of 5052 aluminum alloy, 5052 for 3C electronic housing, and even more high-end 5252 products for similar purposes represent the highest level in this product field...
Claims
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IPC IPC(8): C22F1/047C22F1/02C21D9/52
CPCC22F1/047C22F1/02C21D9/52
Inventor 吴斌赵向东蒲剑丛苏明李玉玲沈国柱周树德
Owner XINJIANG JOINWORLD CO LTD