Method for producing 8014-H22 state aluminium alloy air-conditioner foil by cast-rolled blank

Abstract

The invention provides a method for producing 8014-H22 state aluminium alloy air-conditioner foil by a cast-rolled blank, belonging to the technical field of aluminium alloy plate belt foil processing. The method particularly comprises the steps of: adopting the production way of cast-rolling and cold-rolling, carrying out homogenizing annealing on the cast-rolled blank before cold rolling, and controlling the annealing temperature to be 520-530 DEG C and the annealing time to be 22-25h; after the homogenizing annealing, leading compound to be dispersed, thinning crystalline grains so as to be beneficial to the cold rolling and ensuring the final mechanical property of the product; reasonably distributing the cold rolling channels by the plasticity of metal and the capability of rolling equipment, and carrying out eight-channel cold rolling on the cast-rolled blank with the thickness of 6.4-7.4mm; and carrying out finished product annealing on aluminium foil which is rolled to be 0.17-0.24mm, and controlling annealing temperature to be 360-370 DEG C and the annealing time to be 14-17h. By adopting the method, the mechanical properties of the 8014-H22 state aluminium alloy air-conditioner foil with the thickness of 0.17-0.24mm can be controlled to be: tensile strength sigma b: 120-135MPa; percentage of elongtation delta: 25-30%; and the cup drawing valve: more than or equal to6.5. The method meets the requirement of the mouldability of a large air-conditioner radiating fin.

Description

technical field [0001] The invention belongs to the technical field of processing aluminum alloy plate, strip and foil materials, and in particular relates to the key technology for producing high-quality air-conditioning foil of 8014 aluminum alloy by using casting and rolling slabs. Background technique [0002] my country is a major producer of air conditioners. In the international market, China's air conditioners have obvious competitive advantages, accounting for more than 75% of the world's share. The production of air-conditioning foil, its upstream product, accounts for about half of China's total aluminum foil production. With the fierce competition in the air conditioner market at home and abroad and the narrowing of profit margins, reducing the production cost of air conditioner fin aluminum foil and improving the forming efficiency are the focus of air conditioner factories. At the same time, the fin forming equipment and forming process are continuously improve...

AI Technical Summary

Problems solved by technology

There are few reports on the production of 8014 air-conditioning foil by casting-rolling + cold-rolling method. Most aluminum processing enterprises in China have not yet carried out research and development of this product, and no enterprise can produce air-conditioning foil products that provide this alloy variety and state.