CN1120597A

CN1120597A - Negative foil of Al-Mn alloy and its prodn. method

Info

Publication number: CN1120597A
Application number: CN 94116785
Authority: CN
Inventors: 张为民; 马承志; 侯振庆
Original assignee: DONGBEI LIGHT ALLOY WORKING FACTORY
Current assignee: DONGBEI LIGHT ALLOY WORKING FACTORY
Priority date: 1994-10-08
Filing date: 1994-10-08
Publication date: 1996-04-17

Abstract

The Al-Mn alloy foil as negative electrode material contains such components (Wt.%) as Cu (0.15-0.30), Mg (0.02-0.08), Mn (1.0-1.6), Zn, Fe, Si and Al and is made up through proportioning, casting, homogenizing at 580-620 deg.C, hot rolling at 480-520 deg.C, cold rolling and intermediate annealing at 350-450 deg.C. The finished foil with 0.04-0.05 mm in thickness has faster corrosion speed to form uniform porous corroded surface and high specific capacitance.

Description

Negative foil of Al-Mn alloy and production method

What the present invention relates to is a kind of aluminum base alloy and production method thereof.

Negative foil of Al-Mn alloy is mainly used in manufactures electrolytic condenser.In order to increase than electric capacity, need it is carried out chemical corrosion in acid solution, be that its surface forms the multi-hole type corrosion layer, enlarged surface is long-pending.Existing LF21 alloy, its composition (weight percent) are Cu≤0.20, Mg≤0.05, Zn≤0.10, Mn1.0～1.6, Fe≤0.7, Si≤0.60, Ti≤0.15, the Al of other impurity summation≤0.10 (individual element≤0.05) and surplus.The ratio electric capacity of this alloy can only reach 80uFcm ^-2, and anti-corrosion, erosion rate is low, and production efficiency is low.

The present invention's purpose is to provide a kind of Alloy Foil material that can obtain ideal corrosion surface and high specific capacitance.The present invention also aims to provide a kind of production method that can obtain the Alloy Foil of ideal corrosion surface and high specific capacitance

The present invention's purpose is achieved in that its alloy ingredient (weight percent) is: the Al of Cu0.15～0.30, Mg0.02～0.08, Zn≤0.10, Mn1.0～1.6, Fe≤0.7, Si≤0.6, Ti≤0.15, other impurity summation≤0.15 and surplus.Make the foil that thickness is 0.04～0.05mm.

Raw material prepares earlier and casts, carrying out homogenizing again under 580 ℃～620 ℃ temperature handles, under 480 ℃～520 ℃ temperature, be rolled into the thick volume of 9mm, cold rolling again one-tenth 0.3mm～0.6mm, carrying out process annealing handles, the process annealing temperature is controlled at 350 ℃～450 ℃, finally is rolled into the thick foil of 0.04～0.05mm.

Product of the present invention is to be regarded as impurity in the LF21 alloy, the Cu, the Mg element that need strict its content of control, as necessary interpolation element, join in the alloy with high relatively amount, and the negative foil of Al-Mn alloy that adopts processing method of the present invention to make, its corrosion speed is fast than the LF21 alloy, and the corrosion back forms uniform porous corrosion surface, raising is than electric capacity, and the ratio electric capacity of product of the present invention reaches 350～390uFcm ^-2Its production method ratio is easier to realize.In valid interval, improve the content of Cu, Mg, will help the raising of quality product.

For a more detailed description to the present invention for example below:

Preparing raw material by the Al of final composition (weight percent) Cu0.15～0.30, Mg0.02～0.08, Zn≤0.10, Mn1.0～1.6, Fe≤0.7, Si≤0.6, Ti≤0.15, other impurity summation≤0.15 (individual element≤0.05) and surplus casts.The homogenizing processing was carried out in insulation in 12 hours under 580 ℃～620 ℃ temperature.Under 480 ℃～520 ℃ temperature, carry out hot rolling again, make the thick volume of 9mm.Follow cold rolling one-tenth 0.3mm～0.6mm.Carry out process annealing and handle, the process annealing temperature is controlled at 350 ℃～450 ℃, 8～10 hours total treatment times.Finally be rolled into the thick foil of 0.04～0.05mm.

By final composition (weight percent) Cu0.21～0.30, Mg0.06～0.08, Zn≤0.10, Mn1.0～1.6, Fe≤0.7, Si≤0.6, TI≤0.15, the Al of other impurity summation≤0.15 (individual element≤0.05) and surplus prepares raw material and casts.The homogenizing processing was carried out in insulation in 12 hours under 580 ℃～620 ℃ temperature.Under 480 ℃～520 ℃ temperature, carry out hot rolling again, make the thick volume of 9mm.Follow cold rolling one-tenth 0.3～0.6mm.Carry out process annealing and handle, the process annealing temperature is controlled at 350 ℃～450 ℃.In 8～10 hours total treatment times, finally roll into the foil behind 0.04～0.05mm.

Claims

1, a kind of negative foil of Al-Mn alloy, it is characterized in that: alloy ingredient (weight percent) is: the Al of Cu0.15～0.30, Mg0.02～0.08, Zn≤0.10, Mn1.0～1.6, Fe≤0.7, Si≤0.6, Ti≤0.15, other impurity summation≤0.15 and surplus, its thickness is the foil of 0.04～0.05mm.

2, negative foil of Al-Mn alloy according to claim 1, it is characterized in that: alloy ingredient (weight percent) Cu0.21～0.30, Mg0.06～0.08, Zn≤0.10, Mn1.0～1.6, Fe≤0.7, Si≤0.6, TI≤0.15, the Al of other impurity summation≤0.15 and surplus.

3, a kind of production method of negative foil of Al-Mn alloy, it is characterized in that: by final composition (weight percent) Cu0.15～0.30, Mg0.02～0.08, Zn≤0.10, Mn1.0～1.6, Fe≤0.7, Si≤0.6, Ti≤0.15, the Al of other impurity summation≤0.15 and surplus prepares raw material and casts, carrying out homogenizing under 580 ℃～620 ℃ temperature handles, under 480 ℃～520 ℃ temperature, be rolled into the thick volume of 9mm again, cold rolling again one-tenth 0.3～0.6mm, carrying out process annealing handles, the process annealing temperature is controlled at 350 ℃～450 ℃, finally rolls into the foil behind 0.04～0.05mm.

4, the production method of negative foil of Al-Mn alloy according to claim 3 is characterized in that: the soaking time that described homogenizing is handled is 12 hours.