CN105624461A - Preparation method of Cu-Fe composite material - Google Patents

Preparation method of Cu-Fe composite material Download PDF

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Publication number
CN105624461A
CN105624461A CN201610196982.5A CN201610196982A CN105624461A CN 105624461 A CN105624461 A CN 105624461A CN 201610196982 A CN201610196982 A CN 201610196982A CN 105624461 A CN105624461 A CN 105624461A
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alloy
magnetic field
composite material
preparation
martensitic transformation
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CN105624461B (en
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左小伟
安佰灵
王恩刚
张�林
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Northeastern University China
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Northeastern University China
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C9/00Alloys based on copper
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/02Making alloys by melting
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F3/00Changing the physical structure of non-ferrous metals or alloys by special physical methods, e.g. treatment with neutrons

Abstract

The invention relates to a preparation method of a Cu-Fe composite material and belongs to the technical field of preparation of colored functional materials. The method comprises the following steps: 1. preparation of quickly-solidified Cu-Fe alloy; 2. homogenization treatment under the action of a magnetic field to obtain supersaturated Cu-Fe alloy; 3. forming and roughening of a Fe precipitated phase under the action of the magnetic field to obtain roughened Cu-Fe alloy; 4. martensite transformation under the actions of the magnetic field and low temperature to obtain the Cu-Fe alloy after martensite transformation; 5. complete martensite transformation at room temperature to obtain the Cu-Fe alloy after sufficient martensite transformation; and 6. adsorption growth of Fe under the action of the magnetic field to obtain the Cu-Fe composite material. According to the method disclosed by the invention, enrichment of Fe at a crystal boundary can be increased, and precipitation of Fe at the crystal boundary can be promoted; precipitation and roughing of gamma-Fe are accelerated; martensite transformation rate and ratio are promoted; and the electric conductivity of the prepared Cu-Fe alloy at same reduction rate is increased by 10-50% compared with the prior art.

Description

The preparation method of a kind of Cu-Fe composite material
Technical field
The invention belongs to coloured functional technical field of material, in particular to the preparation method of a kind of Cu-Fe composite material.
Background technology
Copper alloy has good electrical and thermal conductivity, ductility and mechanical property, is the crucial functional materials of the important industry development such as electronic information, electric power, the energy, boats and ships, space flight and machinery. the Cu-Fe system alloy adding Fe formation has electromagnetic property (electromagnetic compatibility, hard magnetic and superparamagnetic etc.) concurrently what reduce costs simultaneously, has potential application foreground in the systems such as long pulse high-strength magnetic field coil electro-conductive material, robot and space shuttle cable, electric contactor and electromagnetic shielding. but the iron bronze (��2.5wt%Fe) electric conductivity of current commercial applications only has 40%��65%IACS, and (IACS represents I.A.C.S., 100%IACS=1.7241 �� �� cm), this restricts it and can only be applied in the low-cost electronic components such as lead frame and electric connector, be difficult in high-end high-strength highly-conductive materials application (as high intensity magnet winding conducting wire material) play and add the cost advantage brought of Fe, and the root of its low electrical conductivity is the Fe atomic impurity scattering being solid-solubilized in Cu matrix can significantly increase resistance (9.2 �� �� cm/1wt%Fe), and solid solution Fe atom is difficult to from Cu matrix to precipitate out usually. therefore, promote the precipitation of Fe, strengthen its precipitation strength and reduce the impurity scattering that solid solution Fe atom brings, for the application prospect improving this alloy system, there is important theory and realistic meaning.
Owing to ��-Fe and Cu are all face-centred cubic structure, and under room temperature, both lattice misfits only have 1.25%, are reduce shape core resistance, can precipitate out with the common lattice ��-Fe particle shape that interfacial energy is minimum. Under external force effect, the ��-Fe reaching critical size can be transformed into ��-Fe, and with magnetic transformation (��-Fe is paramagnetism, and ��-Fe is ferromegnetism). The patent No. be 2010105390636 Chinese invention patent in adopt steady magnetic field and gradient magnetic anneal, reduce the solid solubility in Cu of Fe under high temperature, under effectively promoting low temperature, Fe is from the precipitation Cu, reduce impurity scattering, reach the object increasing Cu-Fe composite material electric conductivity, but now the precipitation mode of Fe mainly relies on and formed in Cu matrix crystalline substance with spherical particle shape; The patent No. is in the Chinese invention patent of 2011102882012, a kind of method utilizing suction pouring to prepare rapid solidification Cu-Fe alloy is disclosed, and in conjunction with ageing treatment, by Fe disperse educt from supersaturated solid solution, but do not utilize magnetic transformation effect, strengthen the precipitation of Fe further, still can run into the low problem being difficult to precipitate out of low temperature diffusion coefficient; Application number be 2015105943730 Chinese invention patent propose a kind of to utilize low-temperature deformation, low-temperature heat treatment to improve the method for Cu-Fe-C complex phase copper alloy performance in conjunction with deformation induced martensitic transformation mode, but owing to the interpolation of C may affect the electron scattering in matrix, do not utilize magnetic transformation effect to strengthen martensitic transformation simultaneously yet. Based on this, the present invention proposes to utilize rapid solidification to obtain the Cu-Fe alloy of crystal boundary enrichment, martensitic transformation is accelerated by magnetic field and low temperature deformation effect, under combined magnetic field, high temperature annealing increases the spread coefficient of Fe, maximumization promotes the precipitation of Fe and reduces the dissolving of Fe in Cu, obtains the Cu-Fe alloy of high-strength high-conductivity.
Summary of the invention
For the deficiencies in the prior art, the present invention proposes the preparation method of a kind of Cu-Fe composite material, the method adopts rapid solidification to obtain supersaturated solid solution, promote the precipitation of Fe at crystal boundary place, coordinate magnetic field and low temperature deformation effect to accelerate martensitic transformation, increased the spread coefficient of Fe by high temperature annealing under combined magnetic field, reduce the dissolving of Fe in Cu, obtain the Cu-Fe alloy of high conductivity high strength, it is to increase Cu-Fe alloy property.
The preparation method of the Cu-Fe composite material of the present invention, comprises the steps:
Step 1, the preparation of rapid solidification Cu-Fe alloy:
Taking electrolytic copper and technical pure Fe as raw material, rapid solidification method after melting, is adopted to obtain Cu-Fe alloy;
Step 2, the Homogenization Treatments under the action of a magnetic field:
By Cu-Fe alloy, being placed in 0.1��35T magnetic field, be heated to 950��1150 DEG C, insulation 6��48h, then shrend, obtain uniform supersaturation Cu-Fe alloy;
Step 3, the formation of Fe precipitated phase and alligatoring under the action of a magnetic field:
By supersaturation Cu-Fe alloy, being placed in 0.1��35T magnetic field, be heated to 500��700 DEG C, insulation 5��96h, cools to room temperature with the furnace, obtains the Cu-Fe alloy of alligatoring;
Martensitic transformation under step 4, magnetic field and cold service:
By the Cu-Fe alloy of alligatoring, being placed in 5��100T magnetic field, temperature-100��-269 DEG C, insulation 5��180min, obtains the Cu-Fe alloy of martensitic transformation;
Step 5, the complete martensitic transformation of room temperature:
To the Cu-Fe alloy of martensitic transformation, apply the deformation of 10��99.999%, obtain the Cu-Fe alloy of abundant martensitic transformation;
Step 6, the absorption growth of Fe under the action of a magnetic field:
By the Cu-Fe alloy of abundant martensitic transformation, being placed in 0.1��35T magnetic field, be heated to 600��750 DEG C, insulation 4��48h, cools to room temperature with the furnace, obtains Cu-Fe composite material.
In described step 1, the purity of electrolytic copper is more than 99.9%; Rapid solidification method is that water cooled copper mould teeming practice or vacuum get rid of band method;
In described step 5, the method applying the deformation of 10��99.999% is drawing, rolling, Equal Channel Angular Pressing or high pressure torsion distortion;
The Cu-Fe composite material that the present invention obtains, by mass percentage, Fe is 4��10%, and surplus is Cu.
The Cu-Fe composite material that the present invention obtains, electric conductivity is 65��82%IACS, tensile strength is 1050��1600MPa.
The preparation method of the Cu-Fe composite material of the present invention, compared with prior art, useful effect is:
(1) prepare Cu-Fe alloy by quick setting method, it is possible to increase the enrichment of crystal boundary place Fe, promote the precipitation of Fe at crystal boundary place.
(2) by applying magnetic field in Homogenization Treatments Cu-Fe alloy, it is possible to obtain uniform supersaturation Cu-Fe alloy by increasing spread coefficient.
(3) by applying magnetic field in the formation precipitating out Fe and alligatoring, it is possible to accelerate precipitation and the alligatoring of ��-Fe.
(4) by applying magnetic field in low temperature martensitic transformation, it is possible to promote martensitic transformation speed and ratio.
(5) by implement above summary of the invention, identical Fe content Cu-Fe alloy prepared by the Cu-Fe alloy ratio prior art of preparation identical subtract face rate time electric conductivity improve 10��50%.
Accompanying drawing explanation
The transmission electron microscope picture of the Cu-Fe composite material that Fig. 1 embodiment of the present invention 1 obtains;
The transmission electron microscope picture of the Cu-Fe composite material that Fig. 2 embodiment of the present invention 2 obtains;
The transmission electron microscope picture of the Cu-Fe composite material that Fig. 3 embodiment of the present invention 3 obtains.
Embodiment
In following examples, the purity of electrolytic copper is 99.9%.
Embodiment 1
The preparation method of Cu-Fe composite material, comprises the steps:
Step 1, the preparation of rapid solidification Cu-Fe alloy:
In mass ratio, electrolytic copper and technical pure Fe=94: 6, prepares burden, and after melting, adopts water cooled copper mould teeming practice to prepare Cu-Fe alloy;
Step 2, the Homogenization Treatments under the action of a magnetic field:
By Cu-Fe alloy, being placed in 12T magnetic field, be heated to 1050 DEG C, insulation 24h, then shrend, obtain uniform supersaturation Cu-Fe alloy;
Step 3, the formation of Fe precipitated phase and alligatoring under the action of a magnetic field:
By supersaturation Cu-Fe alloy, being placed in 25T magnetic field, be heated to 600 DEG C, insulation 5h, cools to room temperature with the furnace, obtains the Cu-Fe alloy of alligatoring;
Martensitic transformation under step 4, magnetic field and cold service:
By the Cu-Fe alloy of alligatoring, being placed in 100T magnetic field, temperature-269 DEG C, insulation 5min, obtains the Cu-Fe alloy of martensitic transformation;
Step 5, the complete martensitic transformation of room temperature:
To the Cu-Fe alloy of martensitic transformation, carry out drawing, apply the deformation of 50%, obtain the Cu-Fe alloy of abundant martensitic transformation;
Step 6, the absorption growth of Fe under the action of a magnetic field:
By the Cu-Fe alloy of abundant martensitic transformation, being placed in 0.1T magnetic field, be heated to 600 DEG C, insulation 48h, cools to room temperature with the furnace, obtains Cu-Fe composite material.
The Cu-Fe composite material that the present embodiment is obtained, electric conductivity is 75%IACS, tensile strength is 1260MPa. The transmission electron microscope picture of the Cu-Fe composite material that this enforcement is obtained, is shown in Fig. 1, and as seen from the figure, in figure, the particle of small and dispersed is exactly the precipitated phase of Fe, and median size is being 10nm, and these precipitated phases improve the intensity of material.
Embodiment 2
The preparation method of Cu-Fe composite material, comprises the steps:
Step 1, the preparation of rapid solidification Cu-Fe alloy:
In mass ratio, electrolytic copper and technical pure Fe=90: 10, prepares burden, and after melting, adopts vacuum to get rid of band legal system and obtains Cu-Fe alloy;
Step 2, the Homogenization Treatments under the action of a magnetic field:
By Cu-Fe alloy, being placed in 0.1T magnetic field, be heated to 1150 DEG C, insulation 6h, then shrend, obtain uniform supersaturation Cu-Fe alloy;
Step 3, the formation of Fe precipitated phase and alligatoring under the action of a magnetic field:
By supersaturation Cu-Fe alloy, being placed in 0.1T magnetic field, be heated to 700 DEG C, insulation 96h, cools to room temperature with the furnace, obtains the Cu-Fe alloy of alligatoring;
Martensitic transformation under step 4, magnetic field and cold service:
By the Cu-Fe alloy of alligatoring, being placed in 20T magnetic field, temperature-200 DEG C, insulation 30min, obtains the Cu-Fe alloy of martensitic transformation;
Step 5, the complete martensitic transformation of room temperature:
To the Cu-Fe alloy of martensitic transformation, it is rolled, applies the deformation of 99.999%, obtain the Cu-Fe alloy of abundant martensitic transformation;
Step 6, the absorption growth of Fe under the action of a magnetic field:
By the Cu-Fe alloy of abundant martensitic transformation, being placed in 10T magnetic field, be heated to 750 DEG C, insulation 4h, cools to room temperature with the furnace, obtains Cu-Fe composite material.
The Cu-Fe composite material that the present embodiment is obtained, electric conductivity is 65%IACS, tensile strength is 1600MPa. The transmission electron microscope picture of the Cu-Fe composite material that this enforcement is obtained, is shown in Fig. 2, and as seen from the figure, in figure, the particle of small and dispersed is exactly the precipitated phase of Fe, and median size is being 10nm, and these precipitated phases improve the intensity of material.
Embodiment 3
The preparation method of Cu-Fe composite material, comprises the steps:
Step 1, the preparation of rapid solidification Cu-Fe alloy:
In mass ratio, electrolytic copper and technical pure Fe=96: 4, prepares burden, and after melting, adopts vacuum to get rid of band legal system and obtains Cu-Fe alloy;
Step 2, the Homogenization Treatments under the action of a magnetic field:
By Cu-Fe alloy, being placed in 5T magnetic field, be heated to 950 DEG C, insulation 48h, then shrend, obtain uniform supersaturation Cu-Fe alloy;
Step 3, the formation of Fe precipitated phase and alligatoring under the action of a magnetic field:
By supersaturation Cu-Fe alloy, being placed in 35T magnetic field, be heated to 500 DEG C, insulation 5h, cools to room temperature with the furnace, obtains the Cu-Fe alloy of alligatoring;
Martensitic transformation under step 4, magnetic field and cold service:
By the Cu-Fe alloy of alligatoring, being placed in 5T magnetic field, temperature-100 DEG C, insulation 180min, obtains the Cu-Fe alloy of martensitic transformation;
Step 5, the complete martensitic transformation of room temperature:
To the Cu-Fe alloy of martensitic transformation, by Equal Channel Angular Pressing, apply the deformation of 10%, obtain the Cu-Fe alloy of abundant martensitic transformation;
Step 6, the absorption growth of Fe under the action of a magnetic field:
By the Cu-Fe alloy of abundant martensitic transformation, being placed in 35T magnetic field, be heated to 650 DEG C, insulation 40h, cools to room temperature with the furnace, obtains Cu-Fe composite material.
The Cu-Fe composite material that the present embodiment is obtained, electric conductivity is 82%IACS, tensile strength is 1050MPa. The transmission electron microscope picture of the Cu-Fe composite material that this enforcement is obtained, is shown in Fig. 3, and as seen from the figure, the precipitation of Fe occurs in crystal boundary place, caused by the reason that this identical Fe content electric conductivity prepared than prior art just improves.
Embodiment 4
The preparation method of Cu-Fe composite material, comprises the steps:
Step 1, the preparation of rapid solidification Cu-Fe alloy:
In mass ratio, electrolytic copper and technical pure Fe=95: 5, prepares burden, and after melting, adopts vacuum to get rid of band legal system and obtains Cu-Fe alloy;
Step 2, the Homogenization Treatments under the action of a magnetic field:
By Cu-Fe alloy, being placed in 6T magnetic field, be heated to 1000 DEG C, insulation 24h, then shrend, obtain uniform supersaturation Cu-Fe alloy;
Step 3, the formation of Fe precipitated phase and alligatoring under the action of a magnetic field:
By supersaturation Cu-Fe alloy, being placed in 6T magnetic field, be heated to 550 DEG C, insulation 20h, cools to room temperature with the furnace, obtains the Cu-Fe alloy of alligatoring;
Martensitic transformation under step 4, magnetic field and cold service:
By the Cu-Fe alloy of alligatoring, being placed in 10T magnetic field, temperature-150 DEG C, insulation 10min, obtains the Cu-Fe alloy of martensitic transformation;
Step 5, the complete martensitic transformation of room temperature:
To the Cu-Fe alloy of martensitic transformation, it is out of shape by high pressure torsion, applies the deformation of 25%, obtain the Cu-Fe alloy of abundant martensitic transformation;
Step 6, the absorption growth of Fe under the action of a magnetic field:
By the Cu-Fe alloy of abundant martensitic transformation, being placed in 12T magnetic field, be heated to 650 DEG C, insulation 12h, cools to room temperature with the furnace, obtains Cu-Fe composite material.
The Cu-Fe composite material that the present embodiment is obtained, electric conductivity is 72%IACS, tensile strength is 1150MPa.
Embodiment 5
The preparation method of Cu-Fe composite material, comprises the steps:
Step 1, the preparation of rapid solidification Cu-Fe alloy:
In mass ratio, electrolytic copper and technical pure Fe=92: 8, prepares burden, and after melting, adopts the obtained Cu-Fe alloy of water cooled copper mould teeming practice;
Step 2, the Homogenization Treatments under the action of a magnetic field:
By Cu-Fe alloy, being placed in 20T magnetic field, be heated to 1100 DEG C, insulation 28h, then shrend, obtain uniform supersaturation Cu-Fe alloy;
Step 3, the formation of Fe precipitated phase and alligatoring under the action of a magnetic field:
By supersaturation Cu-Fe alloy, being placed in 20T magnetic field, be heated to 650 DEG C, insulation 72h, cools to room temperature with the furnace, obtains the Cu-Fe alloy of alligatoring;
Martensitic transformation under step 4, magnetic field and cold service:
By the Cu-Fe alloy of alligatoring, being placed in 15T magnetic field, temperature-200 DEG C, insulation 24min, obtains the Cu-Fe alloy of martensitic transformation;
Step 5, the complete martensitic transformation of room temperature:
To the Cu-Fe alloy of martensitic transformation, carry out drawing, apply the deformation of 75%, obtain the Cu-Fe alloy of abundant martensitic transformation;
Step 6, the absorption growth of Fe under the action of a magnetic field:
By the Cu-Fe alloy of abundant martensitic transformation, being placed in 12T magnetic field, be heated to 600 DEG C, insulation 30h, cools to room temperature with the furnace, obtains Cu-Fe composite material.
The Cu-Fe composite material that the present embodiment is obtained, electric conductivity is 70%IACS, tensile strength is 1350MPa.

Claims (5)

1. the preparation method of a Cu-Fe composite material, it is characterised in that, comprise the steps:
Step 1, the preparation of rapid solidification Cu-Fe alloy:
Taking electrolytic copper and technical pure Fe as raw material, rapid solidification method after melting, is adopted to obtain Cu-Fe alloy;
Step 2, the Homogenization Treatments under the action of a magnetic field:
By Cu-Fe alloy, being placed in 0.1��35T magnetic field, be heated to 950��1150 DEG C, insulation 6��48h, then shrend, obtain uniform supersaturation Cu-Fe alloy;
Step 3, the formation of Fe precipitated phase and alligatoring under the action of a magnetic field:
By supersaturation Cu-Fe alloy, being placed in 0.1��35T magnetic field, be heated to 500��700 DEG C, insulation 5��96h, cools to room temperature with the furnace, obtains the Cu-Fe alloy of alligatoring;
Martensitic transformation under step 4, magnetic field and cold service:
By the Cu-Fe alloy of alligatoring, being placed in 5��100T magnetic field, temperature-100��-269 DEG C, insulation 5��180min, obtains the Cu-Fe alloy of martensitic transformation;
Step 5, the complete martensitic transformation of room temperature:
To the Cu-Fe alloy of martensitic transformation, apply the deformation of 10��99.999%, obtain the Cu-Fe alloy of abundant martensitic transformation;
Step 6, the absorption growth of Fe under the action of a magnetic field:
By the Cu-Fe alloy of abundant martensitic transformation, being placed in 0.1��35T magnetic field, be heated to 600��750 DEG C, insulation 4��48h, cools to room temperature with the furnace, obtains Cu-Fe composite material.
2. the preparation method of Cu-Fe composite material according to claim 1, it is characterised in that, in described step 1, the purity of electrolytic copper is more than 99.9%; Rapid solidification method is that water cooled copper mould teeming practice or vacuum get rid of band method.
3. the preparation method of Cu-Fe composite material according to claim 1, it is characterised in that, in described step 5, the method applying the deformation of 10��99.999% is drawing, rolling, Equal Channel Angular Pressing or high pressure torsion distortion.
4. the preparation method of Cu-Fe composite material according to claim 1, it is characterised in that, the Cu-Fe composite material that described preparation method obtains, by mass percentage, Fe is 4��10%, and surplus is Cu.
5. the preparation method of Cu-Fe composite material according to claim 1, it is characterised in that, the Cu-Fe composite material that described preparation method obtains, electric conductivity is 65��82%IACS, tensile strength is 1050��1600MPa.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108160956A (en) * 2018-01-24 2018-06-15 东北大学 The control method and device of particle coarsening behavior in a kind of liquid/solid two-phase system
CN109055801A (en) * 2018-07-31 2018-12-21 陕西斯瑞新材料股份有限公司 A kind of preparation method using vacuum consumable arc-melting CuFe alloy material
CN111549253A (en) * 2020-07-03 2020-08-18 江西省科学院应用物理研究所 Rare earth copper-iron alloy, preparation method and application

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CN101525731A (en) * 2009-04-22 2009-09-09 东南大学 Cu-Fe original-position compound copper base material and preparation method thereof
CN101775520A (en) * 2010-02-25 2010-07-14 江西省科学院应用物理研究所 Method for preparing high-performance Cu-Fe deformation in-situ composite material by magnetic field treatment
CN105088117A (en) * 2015-09-17 2015-11-25 北京科技大学 Treatment method for improving comprehensive performances of Cu-Fe-C complex phase copper alloy

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JP2002241873A (en) * 2001-02-16 2002-08-28 Hitachi Cable Ltd High strength and highly electrically conductive copper alloy and method for producing copper alloy material
CN101525731A (en) * 2009-04-22 2009-09-09 东南大学 Cu-Fe original-position compound copper base material and preparation method thereof
CN101775520A (en) * 2010-02-25 2010-07-14 江西省科学院应用物理研究所 Method for preparing high-performance Cu-Fe deformation in-situ composite material by magnetic field treatment
CN105088117A (en) * 2015-09-17 2015-11-25 北京科技大学 Treatment method for improving comprehensive performances of Cu-Fe-C complex phase copper alloy

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108160956A (en) * 2018-01-24 2018-06-15 东北大学 The control method and device of particle coarsening behavior in a kind of liquid/solid two-phase system
CN108160956B (en) * 2018-01-24 2020-01-10 东北大学 Method and device for controlling coarsening behavior of particles in liquid/solid two-phase system
CN109055801A (en) * 2018-07-31 2018-12-21 陕西斯瑞新材料股份有限公司 A kind of preparation method using vacuum consumable arc-melting CuFe alloy material
CN111549253A (en) * 2020-07-03 2020-08-18 江西省科学院应用物理研究所 Rare earth copper-iron alloy, preparation method and application

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