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A kind of preparation method of cu-mocu-cu composite plate

A cu-mocu-cu and composite sheet technology, which is applied in the field of composite sheet preparation, can solve the problems of low material utilization, complex equipment, and high cost, and achieve the effects of shortening the processing process, reducing subsequent processing costs, and easy processing and molding

Inactive Publication Date: 2011-12-21
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The explosive composite method has certain limitations in the preparation of Cu-MoCu-Cu materials, such as long process route, high cost, low material utilization rate, difficult control of material thickness ratio, low precision, and some melting zones at the composite interface. Problems such as micro-holes and micro-holes affect the electrical and thermal conductivity of the material, and cannot be completely eliminated even after rolling
Controlled atmosphere hot rolling compounding is an internationally advanced compounding method, but the equipment is complicated, the initial investment is huge, and the technology is difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: Add additives to molybdenum powder with high fluidity and a Fischer average particle size of 2 μm, ball mill and mix for 2 hours, and then roll the mixture into a thin molybdenum plate with a thickness of 0.5 mm at room temperature with a powder rolling mill The additives are copper powder, paraffin and methyl cellulose, and the consumption is respectively 0.5%, 0.8% and 0.5% of the molybdenum powder mass; the higher fluidity refers to: the powder measured by a standard Hall flowmeter The flow time is not more than 65s / 50g; the feeding method of the powder rolling mill adopts upper feeding or horizontal feeding with an inclined hopper;

[0028] Step 2, treating the molybdenum plate thin blank described in step 1 at 300° C. for 3 hours under a hydrogen atmosphere;

[0029] Step 3. Sinter the molybdenum plate thin blank treated in step 2 at 1400°C for 3 hours. During the sintering process, use a refractory material plate to flatten the treated molybdenum plate thi...

Embodiment 2

[0034]The preparation method of this embodiment is the same as that of Example 1, and the difference is that the additive is copper powder, copper oxide powder, methyl cellulose, polyvinyl alcohol, paraffin, glycerol, stearic acid and glycerin one, two, four, five, six, seven or eight of copper oxide powder, methyl cellulose, polyvinyl alcohol, paraffin, glycerol, stearic acid and glycerin Three kinds, or a mixture of copper powder and copper oxide powder, polyvinyl alcohol, paraffin, glycerin, stearic acid and glycerin, or a mixture of copper oxide powder, polyvinyl alcohol, glycerin, stearin A mixture of acid and glycerin with copper powder and methyl cellulose, the amount of a single additive is 0.1% to 1.5% of the mass of the molybdenum powder, and the total amount of additives is not more than 3% of the mass of the molybdenum powder.

[0035] The preparation method of this example is simple, does not require special equipment, and is easy to realize industrial production....

Embodiment 3

[0037] Step 1. Add additives to molybdenum powder with high fluidity and average Fischer particle size of 6 μm, ball mill and mix for 4 hours, and then roll the mixture with a powder rolling mill at a temperature of 100°C to form molybdenum with a thickness of 2mm Thin slab; the additives are copper oxide powder, methyl cellulose and stearic acid, and the consumption is 1% of the mass of the molybdenum powder; the higher fluidity refers to: the powder measured by a standard Hall flowmeter The flow time is not more than 65s / 50g; the feeding method of the powder rolling mill adopts upper feeding or horizontal feeding with an inclined hopper;

[0038] Step 2, treating the molybdenum plate thin blank described in step 1 at 500° C. for 2 hours under a hydrogen atmosphere;

[0039] Step 3, sintering the thin molybdenum plate blank treated in step 2 at 1650° C. for 2 hours to form a porous molybdenum plate with a porosity of 20%;

[0040] Step 4, placing the porous molybdenum plate ...

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Abstract

The invention discloses a preparation method for a Cu-MoCu-Cu composite sheet, which comprises the following steps: 1, adding additives to molybdenum powder, milling for mixing and rolling to form a thin molybdenum plate billet; 2, degreasing the thin molybdenum plate billet; 3, sintering to form a porous molybdenum plate; 4, placing the porous molybdenum plate between two copper plates for copper infiltration and coating to obtain a copper-coated molybdenum-copper alloy plate; and 5, warm rolling, annealing and leveling to obtain the Cu-MoCu-Cu composite sheet. The preparation method is simple, no special equipment is needed, and industrial production can be easily realized. The powder-rolled sheet type molybdenum skeleton capable of facilitating infiltration is subject to the copper infiltration and coating, the preparation process of the copper-coated molybdenum-copper alloy plate is shortened, the follow-up processing cost of the copper-coated molybdenum-copper alloy plate is reduced, the yield is increased, the interface of the prepared copper-coated molybdenum-copper alloy plate has high bonding performance, and the Cu-MoCu-Cu composite sheet can be prepared through rolling the copper-coated molybdenum-copper alloy plate.

Description

technical field [0001] The invention belongs to the technical field of composite sheet preparation, and in particular relates to a method for preparing a Cu-MoCu-Cu composite sheet. Background technique [0002] Molybdenum-copper alloy is a two-phase mixed structure consisting of molybdenum with a body-centered cubic structure and copper with a face-centered cubic structure, which neither solid dissolves nor forms intermetallic compounds. It is usually called a "pseudo-alloy". The preparation methods include infiltration method and mixed sintering method. Molybdenum copper alloy not only has the characteristics of high strength, high hardness and low expansion coefficient of molybdenum, but also has the characteristics of high plasticity and good electrical and thermal conductivity of copper. This unique comprehensive performance makes molybdenum-copper alloys widely used in electrical contact materials, heat sink materials, aerospace high-temperature materials and electron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/04
Inventor 梁静李来平林小辉王国栋蒋丽娟张新曹亮刘燕
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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