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A kind of preparation method of aluminum oxide dispersion strengthened copper strip material

A dispersion-strengthened copper and large plate technology, applied in the direction of metal rolling, etc., can solve the problems that product performance cannot be further improved, product yield cannot be improved, development and application are limited, and it is convenient for large-scale production and use, and it is convenient for follow-up Effect of processing and reducing production cost

Active Publication Date: 2020-08-04
合肥烔创新材料科技合伙企业有限合伙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method of powder metallurgy fundamentally limits the size of the final product, making it difficult to prepare bulk Al 2 o 3 Dispersion strengthened copper materials cannot improve the yield of products, and the production cost is high, and the product performance cannot be further improved, which seriously limits the development and application of this material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for preparing aluminum oxide dispersion strengthened copper bulk strip material, comprising the steps of:

[0035] Step 1: Casting Cu-Al alloy ingots using a semi-continuous casting process. The specific operation of the semi-continuous casting process is to first put pure copper into an induction melting furnace for melting, and cover it with charcoal until the melting temperature of the induction melting furnace reaches After 1250±10°C, add pure aluminum to the induction melting furnace, and add cryolite as a flux to refine for 10 minutes after the burning loss of aluminum is 1%, and then keep the refined mixed solution at a temperature of 1300°C. Set it aside for 10 minutes, and finally carry out semi-continuous casting on the mixed solution after heat preservation and standing. The primary water flow rate of semi-continuous casting is 0.05±0.01m 3 / min, the secondary water flow rate is 0.06±0.01m 3 / min, the inlet water temperature of the crystallizer is 2...

Embodiment 2

[0043] The difference between this embodiment and embodiment 1 is:

[0044] In step 1, add cryolite as a flux and refine for 10 minutes after the burning loss of the added pure aluminum in the induction melting furnace reaches 3%, the crystallizer inlet temperature during semi-continuous casting is 30°C, and the pressure of cooling water is 0.08MPa , the casting speed is 1.2m / h;

[0045] In step 2, the holding time of the square Cu-Al alloy ingot is 5h before hot rolling, and the processing rate during hot rolling is 90%. During cold rolling, the processing rate of each front cold rolling and post cold rolling Both are 20%, the annealing time during the annealing treatment is 90min, the temperature during the secondary annealing is 550°C, the secondary annealing time is 4h, and the width of the finally prepared Cu-Al alloy plate and strip is 0.2mm;

[0046] In step 3, the DC voltage used during the electrochemical dealloying of the Cu-Al alloy plate and strip is 8V, and the t...

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Abstract

The invention discloses a preparation method of an aluminum oxide dispersion strengthening copper block plate strip material. The preparation method comprises the following steps that 1, a Cu-Al alloyingot is casted; 2, a Cu-Al alloy plate strip is prepared; 3, electrochemical dealloying is performed to treat the surface of the single-layer Cu-Al alloy plate strip; 4, Cu2O particles are attachedto an Cu-Al alloy sheet; 5, casting rolling is performed on the sandwich type Cu-Al alloy sheet; 6, internal oxidation treatment is performed in the alloy sheet; and 7, densification treatment is performed on the alloy sheet. The preparation method of the aluminum oxide dispersion strengthening copper block plate strip material can effectively simplify a traditional preparation process, improve the product yield and product output, mass production and use are facilitated, the production cost can be effectively reduced, the product performance of the manufactured product is improved, the product structure uniformity is improved, the product conductivity is improved, the product strength and the high-temperature resistance softening performance are effectively ensured, the product density isimproved, and the problem that a traditional method cannot prepare a block of Al2O3 dispersion strengthening copper plate strip material is overcome.

Description

technical field [0001] The invention relates to the technical field of metal matrix composite material preparation, in particular to a method for preparing aluminum oxide dispersion strengthened copper bulk strip material. Background technique [0002] al 2 o 3 Dispersion-strengthened copper alloy is an excellent high-strength and high-conductivity material. It has high room temperature and high temperature strength. Its electrical conductivity and tensile strength are similar to chromium-zirconium copper, but the softening temperature is > 900 ° C, while chromium-zirconium copper Its softening temperature is >550°C, so its own high temperature performance is more prominent, and it can be used as an upgrading material for chromium-zirconium copper materials, so it can be widely used in lead frames of integrated circuits, overhead wires of large electric locomotives, automobiles and color Components such as resistance welding electrodes and high-thrust rocket engine l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/46B21B3/00B21C37/02C22C1/10B22D11/00C25F3/02
CPCB21B1/463B21B3/00B21B2003/005B21C37/02B22D11/004C22C1/1078C25F3/02
Inventor 张建波郑铮辉胡咏梅张雪辉李律达肖翔鹏李勇黄斐
Owner 合肥烔创新材料科技合伙企业有限合伙
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