Production method of 4004 aluminum alloy medium gauge foil

Abstract

The invention provides a production method of a 4004 aluminum alloy medium gauge foil, which comprises the following steps: smelting and casting; face milling; heating; hot rolling; primary cold rolling, wherein the thickness after rolling is 1.5-2.0mm; primary annealing: carrying out annealing treatment at a second preset temperature for a second preset time; primary trimming, wherein the trimming amount is 30-50mm; secondary cold rolling, wherein the thickness after rolling is 0.7-0.8mm; secondary annealing: carrying out annealing treatment at 200-260 DEG C for 3-5 hours; tertiary cold rolling, wherein the thickness after rolling is 0.24mm; secondary trimming, wherein the trimming amount is 20-30mm; foil rolling; cutting, wherein the trimming amount is 30-40mm; and tertiary annealing, thereby completing the production of the welding flux. After the secondary cold rolling, the aluminum coil is subjected to low-temperature annealing treatment to further enhance the plasticity of the material, thereby reducing the possibility of checked edges, enhancing the product yield and reducing the trimming amount.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to a production method of 4004 aluminum alloy single zero foil. Background technique [0002] Due to its high silicon content, low melting point, good melt fluidity, easy feeding and no brittleness of the final product, 4004 alloy is mainly used as additive material for aluminum alloy welding. The chemical composition control of 4004 alloy is carried out in accordance with the national standard GB / T3190. Its main components are Si: 9.0~10.5%; Fe: 0.8%; Cu: 0.25%; Mn: 0.10%; Mg: 1.0~2.0%; Zn: 0.20%. [0003] 4004 aluminum alloy single zero foil for brazing is used as vacuum brazing filler metal for plate-fin heat exchangers to increase the welding strength of fins and brazing plates after vacuum brazing, thereby improving the pressure resistance of the equipment. The production process route of this product is: melting - casting - milling - heating - hot rolling -...

AI Technical Summary

Problems solved by technology

In the above production process, intermediate annealing is carried out from 5.1mm cold rolling to 0.8mm, but the amount of edge trimming is large (0.8mm cuts 100~120mm wide, 0.24mm cuts 50~80mm wide), resulting in extremely low yield of the product. From 5.1mm cold rolling to finished product 0.1mm, the finished product rate is less than 50%. At the same time, if the material continues to be thinned and rolled, there will be edge cracking, and it cannot be rolled to the existing finished product thickness of 0.05mm.

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