Ageing heat treatment process of 3003 aluminium alloy electronic foil

Abstract

Provided is an ageing heat treatment process of a 3003 aluminium alloy electronic foil. When original hot rolling or cast rolling blank is rolled to be in the thickness of 5.0<+ / -0.2>mm, high temperature homogenizing annealing treatment is used, the formation is well-closed, and segregation is weakened. Multi-pass cold rolling is continuously conducted after annealing, and when the thickness of 0.5<+ / -0.05>mm is achieved, a complete annealing treatment process is conducted to weaken residual stress. The multi-pass cold rolling is continuously conducted until the thickness of 0.24<+ / -0.01>mm is achieved, foil rolling is directly converted, when multi-pass foil rolling reaches the thickness of 0.09<+ / -0.005>mm, ageing treatment of 80<+ / -5> DEG C *3<+ / -0.5> h is conducted, and the control over the morphology and the distribution of the second phase of the aluminium alloy electronic foil blank is achieved. The thickness of a finished product of 0.042mm - 0.038mm is achieved through multiple times of foil rolling after the ageing treatment. A specified heat treatment process is conducted on the 3003 aluminium alloy electronic foil blank, the control over the morphology and the distribution of second phase particles (MnAl6 phase) in the 3003 aluminium alloy is achieved, a large number of second phase particles are made to be dispersed and distributed evenly, the blank is used, the corrosion effect in the later period is good, the specific capacitance of the aluminium alloy electronic foil is improved, and 560-595 muF / cm<2> can be achieved.

Description

technical field [0001] The invention relates to an aging treatment method for a 3003 aluminum alloy electronic foil blank, mainly for producing Aging heat treatment process for electronic aluminum foil blanks for aluminum electrolytic capacitors with high thickness. Background technique [0002] Aluminum foil is widely used in various fields such as electrical appliances, packaging, and construction. With the development of the times, the application range has also increased, and higher requirements have been put forward for product quality. 3003 aluminum alloy electronic foil is an aluminum foil widely used in aluminum electrolytic capacitors. Due to the rapid development of electronic machines in the direction of short, small, light and thin, the process of miniaturization and miniaturization of aluminum electrolytic capacitors must be accelerated. The key to the miniaturization of aluminum capacitors lies in the large effective surface area of ​​the aluminum electrode ...

AI Technical Summary

Problems solved by technology

Although 3003 aluminum alloy is an alloy that cannot be strengthened by heat treatment, aging heat treatment is usually not performed in actual production.