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Internal nitriding preparation method of an aluminum nitride dispersion strengthened copper composite material

A dispersion-strengthened copper and composite material technology, which is applied in the field of internal nitriding preparation of aluminum nitride dispersion-strengthened copper composite materials, can solve the problems of high oxygen content, coarse aluminum nitride particles, and low strength of aluminum oxide dispersed copper composite materials. problems, to achieve the effects of avoiding cracking problems, high yield, and simple preparation process

Active Publication Date: 2018-09-25
KINKOU SUZHOU COPPER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Purpose of the invention: In order to solve the deficiencies of the prior art, the present invention provides an internal nitriding preparation method of aluminum nitride dispersion strengthened copper composite material, which solves the problem of high oxygen content in aluminum oxide dispersed copper composite material, which is completely No hydrogen embrittlement problem; solve the problem of coarse aluminum nitride particles in mechanical ball milling composite aluminum nitride-copper composite materials; solve the problems of cracking and low strength caused by excessive chromium in the process of preparing aluminum nitride composite materials from chromium nitride

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Pretreatment

[0035] The copper and aluminum powder prepared by the water mist method is used as the raw material. The particle size of the powder is -300 mesh, and the mass percentage of the aluminum powder is 0.1%. 3 minutes;

[0036] (2) Sintering

[0037] The pretreated metal powder is sintered. During the sintering process, 1vol.% nitrogen, 1vol.% hydrogen, and the rest are a mixture of high-purity argon. The high-purity argon has a purity of 90vol. % of argon, the sintering temperature is 900°C, the holding time is 2h, and the ingot is made;

[0038] (3) Thermal deformation

[0039] The prepared ingot is subjected to hot extrusion treatment, and aluminum nitride copper matrix composite rods are obtained through hot extrusion treatment. The extrusion ratio of hot extrusion is 20:1, the extrusion temperature is 920 °C, and the extrusion speed is 12mm / s;

[0040] (4) cold deformation

[0041] Swaging or cold-rolling deformation treatment is carried out on ...

Embodiment 2

[0045] (1) Pretreatment

[0046] The copper and aluminum powder prepared by the water mist method is used as the raw material. The particle size of the powder is -200 mesh, and the mass percentage of the aluminum powder is 0.5%. 10min;

[0047] (2) Sintering

[0048] The pretreated metal powder is sintered. During the sintering process, 10vol.% nitrogen, 5vol.% hydrogen, and the rest are a mixture of high-purity argon. The high-purity argon has a purity of 90vol. % of argon, the sintering temperature is 920°C, the holding time is 8h, and the ingot is made;

[0049] (3) Thermal deformation

[0050] The obtained ingot is hot-rolled and deformed, and aluminum nitride-copper-based composite material rods are obtained through hot-rolling and deformation treatment. The rolling temperature is 920° C., and the rolling deformation is 30%;

[0051] (4) cold deformation

[0052]Swaging or cold-rolling deformation treatment is carried out on the plate or bar obtained after the therma...

Embodiment 3

[0056] (1) Pretreatment

[0057] The copper and aluminum powder prepared by the water mist method is used as the raw material, the particle size of the powder is +400 mesh, the mass percentage of the aluminum powder is 1%, and the cold isostatic pressing at room temperature is adopted, the pressure is 370MPa, the pressurization speed is 60MPa, and the holding time 15min;

[0058] (2) Sintering

[0059] The pretreated metal powder is sintered. During the sintering process, 20vol.% nitrogen, 10vol.% hydrogen, and the rest are a mixture of high-purity argon. The high-purity argon has a purity of 90vol. % of argon, the sintering temperature is 950°C, the holding time is 10h, and the ingot is made;

[0060] (3) Thermal deformation

[0061] The obtained ingot is hot-rolled and deformed, and aluminum nitride-copper-based composite rods are obtained through hot-rolling and deformation treatment. The rolling temperature is 920 ° C, and the rolling deformation is 60%;

[0062] (4) R...

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Abstract

The invention discloses an internal nitriding preparation method of an aluminum nitride dispersion strengthened copper composite material. The method comprises the steps of pretreatment, sintering, thermal deformation, rotary forging and fine rolling. By adopting the method, the problem of high impurity oxygen content and complete freedom from hydrogen embrittlement in the aluminum nitride dispersion strengthened copper composite material is solved, the problem of coarse particles of aluminum nitride in a composite aluminum nitride-copper composite material prepared by mechanical ball millingis solved, and the problems of cracking, low strength and the like caused by excessive chromium in a process of preparing an aluminum nitride composite material from chromium nitride are solved.

Description

technical field [0001] The invention relates to the field of metal material processing technology, in particular to an internal nitriding preparation method of aluminum nitride dispersion strengthened copper composite material. Background technique [0002] Dispersion-strengthened copper composites have the advantages of high thermal conductivity, high electrical conductivity, excellent high-temperature strength, high-temperature creep resistance, and good wear resistance. They have great application potential in the fields of electromechanical, electronics, aerospace, and atomic energy. The contribution of the diffusely distributed ceramics to the composite material is mainly: (1) pinning dislocations, increasing the dislocation density, thereby enhancing the work hardening effect; (2) hindering the migration of dislocations and subgrains under high temperature conditions, thereby It hinders recrystallization nucleation and grain boundary migration, and achieves high temper...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C1/04C22C9/00C22F1/08
CPCC22C1/10C22C9/00C22F1/08
Inventor 朱戴博韩坦
Owner KINKOU SUZHOU COPPER IND CO LTD