Aluminum alloy strip material for capacitor outer shell and preparation method of aluminum alloy strip material

A technology for aluminum alloy strips and capacitors, which is applied in the field of aluminum alloy strips for capacitor casings and their preparation, can solve the problems of high ear production rate and poor deep drawing performance, and achieves sufficient precipitation, uniform distribution, plasticity and deep drawing performance. excellent effect

Inactive Publication Date: 2017-09-05
CHINALCO RUIMIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide an aluminum alloy strip for capacitor casing and its preparation method in view of the existing problems of poor deep drawing performance and high ear-making rate of the existing material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of aluminum alloy strip material for capacitor case, its raw material composition is: Si 0.2wt%, Fe 0.58wt%, Cu0.06wt%, Mn 1.05wt%, Mg 0.02wt%, Ti 0.01wt%, Fe / Si= 2. Fe+Mn=1.63wt% and the balance is Al.

[0024] A method for preparing the above-mentioned aluminum alloy strip for capacitor shells, the specific steps are:

[0025] (1) According to the composition of the aluminum alloy strip, the aluminum alloy raw material is semi-continuously cast into an aluminum alloy flat ingot after smelting, refining, online deslagging and degassing;

[0026] (2) After sawing and milling the slab, heat it at 580°C and hold it for 4 hours for homogenization heat treatment, and then cool it down to the hot rolling start temperature of 510°C at a rate of 20°C / hour;

[0027] (3) Then it is hot rolled out of the furnace, the thickness of hot rolling is 2.5mm, and the finishing temperature of hot rolling is 320°C;

[0028] (4) Roll the hot-rolled plate to an intermediate thicknes...

Embodiment 2

[0034] A kind of aluminum alloy strip material for capacitor case, its raw material composition is: Si 0.2wt%, Fe 0.32wt%, Cu0.10wt%, Mn 1.10wt%, Mg 0.04wt%, Ti 0.02wt%, Fe / Si= 2.5, Fe+Mn=1.42wt%, the balance is Al.

[0035] A method for preparing the above-mentioned aluminum alloy strip for capacitor shells, the specific steps are:

[0036] (1) According to the composition of the aluminum alloy strip, the aluminum alloy raw material is semi-continuously cast into an aluminum alloy flat ingot after smelting, refining, online deslagging and degassing;

[0037] (2) After sawing and milling the slab, heat it at 600°C and hold it for 8 hours for homogenization heat treatment, and then cool it down to the hot rolling start temperature of 510°C at a rate of 20°C / hour;

[0038] (3) Then it is hot rolled out of the furnace, the thickness of hot rolling is 3.0mm, and the finishing temperature of hot rolling is 340°C;

[0039] (4) Roll the hot-rolled plate to an intermediate thickness...

Embodiment 3

[0045] A kind of aluminum alloy strip material for capacitor case, its raw material composition is: Si 0.25wt%, Fe 0.5wt%, Cu0.086wt%, Mn 1.09wt%, Mg0.002wt%, Ti 0.028wt%, Fe / Si= 2. Fe+Mn=1.59wt% and the balance is Al.

[0046] A method for preparing the above-mentioned aluminum alloy strip for capacitor shells, the specific steps are:

[0047] (1) According to the composition of the aluminum alloy strip, the aluminum alloy raw material is semi-continuously cast into an aluminum alloy flat ingot after smelting, refining, online deslagging and degassing;

[0048] (2) After the slab is sawed and milled, it is subjected to 610°C and held for 6 hours for homogenization heat treatment, and then cooled to the hot rolling start temperature of 510°C at a rate of 20°C / hour;

[0049] (3) Then it is hot rolled out of the furnace, the thickness of hot rolling is 3.5mm, and the finishing temperature of hot rolling is 330°C;

[0050] (4) Roll the hot-rolled plate to an intermediate thickn...

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Abstract

The invention belongs to the field of aluminum alloy strip materials and particularly relates to an aluminum alloy strip material for a capacitor outer shell and a preparation method of the aluminum alloy strip material. The components of an aluminum alloy comprise, by weight, 0.2-0.3% of Si, 0.3-0.6% of Fe, 0.06-0.20% of Cu, 1.05-1.35% of Mn, smaller than 0.05% of Mg, 0.01-0.03% of Ti and the balance Al, wherein Fe / Si=2-4, and Fe+Mn<1.95%. After burdening is conducted, aluminum alloy slab ingots are formed through semi-continuous casting, and after heat treatment, hot rolling and cold rolling techniques are conducted, the aluminum alloy strip material with the tensile strength being 155-165 MPa, the yield strength being 145-165 MPa and the earing ratio being smaller than 3% is obtained. According to the aluminum alloy strip material, the good deep stamping property can be met, and good laser welding can be achieved.

Description

technical field [0001] The invention belongs to the field of preparation of aluminum alloy strips, and in particular relates to an aluminum alloy strip for capacitor shells and a preparation method thereof. Background technique [0002] The punching process of the capacitor shell has large deformation, many punching passes, and complicated production process, which puts forward high requirements on the comprehensive performance of the material, especially the deep drawing performance, not only requires the material to have small thickness deviation and good surface quality, At the same time, it also needs to have good plasticity, small yield ratio and low lug rate to ensure the safety of the capacitor during service. [0003] The invention optimizes the composition of the aluminum alloy strip, based on the control technology research of texture, compound and grain, etc., and realizes the excellent matching of material strength, plasticity and deep drawing performance, so t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22F1/04
CPCC22C21/00C22F1/04
Inventor 乔建博廖明顺阙石生黄瑞银
Owner CHINALCO RUIMIN
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