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Integration method of preparing the gradient copper base compound material and forming parts

A copper-based composite material and gradient technology, which is applied in the field of the preparation of gradient copper-based composite materials and the integration of parts forming, can solve problems such as high difficulty and difficult to master, and achieve the effects of improving strength, easy promotion, and good interface bonding.

Inactive Publication Date: 2010-07-28
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common methods for preparing in-situ endogenous particle-reinforced metal matrix composites mainly include XD method (US Patent, U.S. Patent No. 4710348) and contact reaction method (Chinese Patent, Patent No. 93104814). These methods are highly skilled and difficult High, difficult to master, mainly used to make particle-reinforced Al-based, Ti-based, Zn-based composite materials, and can only prepare overall reinforced composite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] According to the wear resistance requirements of the surface of the lead frame, determine the surface Al of the composite layer 2 o 3 The content of Cu powder is 12.5%, the thickness of the composite layer is 5mm, and the gradient lamination is determined to be 5 layers. The mass fractions of Cu powder are designed to be 12.5%, 10%, 7.5%, 5% and 2.5% respectively from the surface to the inside. The thickness is 1mm.

[0013] According to the molar ratio of Al powder and CuO powder of 1:1.5, Al powder is 18.4g and CuO powder is 81.6g in every 100g reactant, and the doping amount of Cu powder calculated according to 100g reactant is respectively 177.6g, 247g, 362.7g, 594g, 1288g, the particle size of Al powder, CuO powder, and Cu powder is 75 μm.

[0014] First, the reactant and different amounts of Cu powder were pre-pressed into a forming mold with a pressure of 0.5 tons to form a reaction sheet with a thickness of about 1.2 mm; then, the above-mentioned sheets were l...

Embodiment 2

[0016] According to the surface wear resistance requirements of the continuous casting crystallizer, determine the surface Al of the composite layer 2 o 3 The content of Cu powder is 25%, the thickness of the composite layer is 15mm, the gradient lamination is determined to be 5 layers, and the mass fractions of Cu powder are designed to be 25%, 20%, 15%, 10% and 5% respectively from the surface to the inside, and each layer of the reaction sheet The thickness is 3mm.

[0017] According to the molar ratio of Al powder and CuO powder of 1:1.5, 18.4g of Al powder and 81.6g of CuO powder in every 100g of reactant, the addition amount of Cu powder calculated according to 100g of reactant is respectively 36.8g, 73.5g, 131g, 247g, 594g, cellulose content 0.1g, Al powder, CuO powder, Cu powder particle size 150μm.

[0018] Firstly, the reactants and different amounts of Cu powder were pre-pressed in the forming mold with a pressure of 0.5 tons to form a 3.6 mm reaction sheet slight...

Embodiment 3

[0020] According to the wear resistance requirements of the electrode material surface and the structural characteristics of the electrode material, determine the surface Al of the composite layer 2 o 3 The content of Cu powder is 25%, the thickness of the composite layer is 2mm, the gradient lamination is determined to be 2 layers, the mass fraction of Cu powder is designed from the surface to the inside to be 25% and 10%, and the thickness of the reaction sheet is 1.0mm.

[0021] According to the molar ratio of Al powder and CuO powder 1:1.5, Al powder is 18.4g and CuO powder is 81.6g in every 100g reactant, and the doping amount of Cu powder calculated according to 100g reactant is respectively 36.8g and 247g, and the cellulose content 0.1 g, Al powder, CuO powder, and Cu powder have a particle diameter of 25 μm.

[0022] Firstly, the reactant and different amounts of Cu powder were pre-pressed in the forming mold with a pressure of 0.5 tons to form a 1.5mm reaction sheet ...

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Abstract

The invention discloses a method for preparing a gradient copper matrix composite material and for integrating a part. The method comprises the steps of preparing reaction flakes with different proportions; laminating the reaction flakes according to the Cu content gradient; subjecting the reaction flakes to cold pressing in a mould to obtain a prefabricated reaction block; fixing the prefabricated reaction block on the top part of the die cavity of a sand-type mould or a metal-type mould; melting pure copper in a pot resistance furnace and heating the pure copper to 1133 DEG C-1183 DEG C; and then casting to obtain the copper matrix composite material with Al2O3 content distributed in gradient on the surface of a part. The method utilizes high temperature Cu to ignite the prefabricated block containing Al powder, CuO powder and Cu powder in gradient lamination, realizes the integration of strengthening the part surface gradient and shaping the part, thereby reducing cost, strengthening the strength and the performance of high temperature creep resistance and abrasion resistance of the copper matrix composite material, and improving the quality of the part.

Description

technical field [0001] The invention relates to an integrated method for preparing a gradient copper-based composite material and forming parts. Background technique [0002] Copper-based composite materials have excellent electrical and thermal conductivity, high temperature stability and high strength. They have great application potential in high-tech fields such as electromechanical, aerospace, and microelectronics. They have been widely used in large-scale integrated circuit lead frames, welding electrodes, Change-over switches, electrical contacts, etc. are the key materials for the development of modern electronic information industry. Although pure copper has high electrical conductivity, thermal conductivity and good arc corrosion resistance, its room temperature strength and high temperature strength are low, which makes it difficult to meet the actual application requirements in some special fields. [0003] Although the traditional alloy strengthening method imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D23/00B22F3/03B22D23/06
Inventor 周广宏丁红燕章跃刘义发李年莲史绍军
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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