CN109182832A - A kind of formula and a kind of powder injection molding process of carbon nanotube reinforced copper-base alloy - Google Patents

A kind of formula and a kind of powder injection molding process of carbon nanotube reinforced copper-base alloy Download PDF

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CN109182832A
CN109182832A CN201811322029.6A CN201811322029A CN109182832A CN 109182832 A CN109182832 A CN 109182832A CN 201811322029 A CN201811322029 A CN 201811322029A CN 109182832 A CN109182832 A CN 109182832A
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carbon nanotube
cucr
alloy
feeding
alloy powder
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CN109182832B (en
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邬均文
薛永超
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Jiangsu Gian Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/05—Metallic powder characterised by the size or surface area of the particles
    • B22F1/052—Metallic powder characterised by the size or surface area of the particles characterised by a mixture of particles of different sizes or by the particle size distribution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/05—Metallic powder characterised by the size or surface area of the particles
    • B22F1/054—Nanosized particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/05—Metallic powder characterised by the size or surface area of the particles
    • B22F1/054—Nanosized particles
    • B22F1/0549—Hollow particles, including tubes and shells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
    • B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • B22F2009/041—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by mechanical alloying, e.g. blending, milling

Abstract

The present invention relates to a kind of formulas of carbon nanotube reinforced copper-base alloy, including carbon nanotube, further include CuCr1Alloy powder, carbon nanotube and CuCr1Alloy powder proportionally carries out being mixed to get feeding, and the invention also includes a kind of powder injection molding process, the method finished product including preparation, granulation, injection moulding and degreasing, sintering；The present invention enhances the formula of acid bronze alloy by inventing a kind of mounted scout's honey jar and by injection molding method, and finished product is efficient convenient.

Description

A kind of formula and a kind of powder injection molding process of carbon nanotube reinforced copper-base alloy
Technical field
The present invention relates to a kind of formula of carbon nanotube reinforced copper-base alloy and a kind of powder injection molding process.
Background technique
Thermally conductive, the electric conductivity that carbon nanotube reinforced copper alloy had both had copper alloy excellent, while also there is composite material Thermal expansion coefficient is low, the characteristics such as wearability is good, high-temperature capability is good.The fields such as Aeronautics and Astronautics, the energy, automobile are mainly used in, Such as semiconductor, conductor rail, electrical contact, self-lubricating bearing.Currently, mainly by carbon fiber surface copper facing or nickel etc., then lead to It crosses and carries out material mixing, molding, sintering molding with copper or copper alloy powder, and combine the aftertreatment technologies such as hot rolling to obtain high performance carbon and receive Mitron enhances copper alloy composite material.
Carbon nanotube is not infiltrated with copper, and the interface binding power of composite material is relatively weak.Carbon nanotube is generallyd use at present Process for surface coating obtains the metal coating that can increase infiltration, to improve the intensity of composite material.Therefore, the technology road Line is relatively cumbersome, and production cost is relatively high.
Patent of invention content
The purpose of the present invention first is to provide a kind of formula of efficient carbon nanotube reinforced copper-base alloy.
Realizing the technical solution of the object of the invention is: the present invention includes carbon nanotube, further includes CuCr1Alloy powder and viscous Tie agent, the specification of the nanotube are as follows: 10-30 μm of length, caliber 5-10nm, purity >=97%；The CuCr1Alloy powder Ingredient are as follows: the content of Cr is 0.9-1.1%, and content≤0.15% of O, remaining ingredient is Cu element；The CuCr1Alloyed powder The specification at end are as follows: D10 size distribution is 3-4 μm, and D50 size distribution is 9-10 μm, and D90 size distribution is 24.0-25 μm；
CuCr1Weight account for the 99.4% of total weight, the weight of carbon nanotube accounts for the 0.6% of total specific gravity.
Above-mentioned binder is a kind of modeling matrix system binder.
The purpose of the present invention second is to provide a kind of technologically advanced, efficient powder injection molding process of production.
Realize the object of the invention technical solution be: the present invention the following steps are included:
A, it prepares feeding: above-mentioned carbon nanotube reinforced copper-base alloy being sufficiently mixed in three-dimensional mixer, is obtained Evenly dispersed carbon nanotube and CuCr1Alloy powder mixture；It is 190 ± 5 in temperature again by atmosphere protection mixing technology At DEG C, under argon gas protection, purity >=99.999% of argon gas, by carbon nanotube and CuCr1Alloy powder mixture, binder are mixed Refining 2-3 hours, gained feeding melting means are 1000-1200g/10min；
B, it is granulated: will be prepared by the feeding being kneaded in the preparation method of carbon nanotube acid bronze alloy by pelletizer The feeding raw material of the injection of fixed particle shape；
C, be injection moulded: by feeding raw material injection injector barrel in, then by nozzle of injector injection mold at Carbon nanotube reinforced copper alloy composite materials blank is made in type, depanning；
D, degreasing, sintering: it is pure by blank catalysis degreasing using oxalic acid at a temperature of 110 ± 10 DEG C, oxalic acid purity >= 99.6%, 2-4 hours sinter moldings are then kept at a temperature of hydrogen atmosphere, 1040 ± 5 DEG C.
The present invention has the effect of positive: (1) present invention is designed and preparation, feeding raw material system by copper alloy powder ingredient Standby, combining powder injection molding technology prepares carbon nanotube reinforced copper alloy composite materials part.
(2) for the present invention compared with fine copper, CuCr1 alloy improves the wellability and interface cohesion of carbon nanotube and Copper substrate Power.
(3) the technology of the present invention uses powder injection molding technology, meets currently advanced scientific and technological industry and leads to high-intensitive, height Heat, wear-resistant copper, the high-precision of thermal expansion coefficient dilute copper alloy part, high labyrinth, high efficiency and large-scale production etc. are wanted It asks.
Specific embodiment
(embodiment one)
The present invention, which has, provides a kind of formula of carbon nanotube reinforced copper-base alloy, including carbon nanotube, further includes CuCr1 Alloy powder and binder, the specification of nanotube are as follows: 10 μm of length, caliber 10nm, purity >=97%；CuCr1Alloy powder Ingredient are as follows: the content of Cr is the content 0.15% of 0.9, O, remaining ingredient is Cu element；CuCr1The specification of alloy powder are as follows: D10 size distribution is 3 μm, and D50 size distribution is 10 μm, and D90 size distribution is 24.5 μm, and the binder is a kind of modeling matrix It is binder；
CuCr1Weight account for the 99.4% of total weight, the weight of carbon nanotube accounts for the 0.6% of total specific gravity.
The invention further relates to a kind of powder injection molding process, comprising the following steps:
A, it prepares feeding: above-mentioned carbon nanotube reinforced copper-base alloy being sufficiently mixed in three-dimensional mixer, is obtained Evenly dispersed carbon nanotube and CuCr1Alloy powder mixture；It is 190 ± 5 in temperature again by atmosphere protection mixing technology At DEG C, under argon gas protection, purity of argon >=99.999%, by carbon nanotube and CuCr1Alloy powder mixture, binder are kneaded 2-3 hours, gained feeding melting means was 1000-1200g/10min；
B, it is granulated: will be prepared by the feeding being kneaded in the preparation method of carbon nanotube acid bronze alloy by pelletizer The feeding raw material of the injection of fixed particle shape；
C, be injection moulded: by feeding raw material injection injector barrel in, then by nozzle of injector injection mold at Carbon nanotube reinforced copper alloy composite materials blank is made in type, depanning；
D, degreasing, sintering: at a temperature of 110 DEG C, using oxalic acid purity catalysis degreasing, oxalic acid purity >=99.6%, degreasing Rate >=7.3%.Then 2-4 hours sinter moldings, sintered density >=8.4g/cm are kept at a temperature of hydrogen atmosphere, 1040 DEG C3；
The key technical indexes of gained finished product has: density p >=8.4g/cm3, hardness Hv80-100HV0.3, yield strength σ s >=280Mpa, tensile strength >=400Mpa, conductivity IACS >=70%, thermal coefficient >=220W/mk, thermal expansion coefficient≤10 × 10-6℃-1。
(embodiment two)
The present invention, which has, provides a kind of formula of carbon nanotube reinforced copper-base alloy, including carbon nanotube, further includes CuCr1 Alloy powder and binder, the specification of nanotube are as follows: 11 μm of length, caliber 9nm, purity >=97%；CuCr1Alloy powder at Be divided into: the content of Cr is the content 0.14% of 0.92%, O, remaining ingredient is Cu element；CuCr1The specification of alloy powder are as follows: D10 size distribution is 4 μm, and D50 size distribution is 9 μm, and D90 size distribution is 25 μm, and the binder is a kind of modeling matrix system Binder；
CuCr1Weight account for the 99.4% of total weight, the weight of carbon nanotube accounts for the 0.6% of total specific gravity.
The invention further relates to a kind of powder injection molding process, comprising the following steps:
A, it prepares feeding: above-mentioned carbon nanotube reinforced copper-base alloy being sufficiently mixed in three-dimensional mixer, is obtained Evenly dispersed carbon nanotube and CuCr1Alloy powder mixture；It is 190 ± 5 in temperature again by atmosphere protection mixing technology At DEG C, under argon gas protection, purity of argon >=99.999%, by carbon nanotube and CuCr1Alloy powder mixture, binder are kneaded 2-3 hours, gained feeding melting means was 1000-1200g/10min；
B, it is granulated: will be prepared by the feeding being kneaded in the preparation method of carbon nanotube acid bronze alloy by pelletizer The feeding raw material of the injection of fixed particle shape；
C, be injection moulded: by feeding raw material injection injector barrel in, then by nozzle of injector injection mold at Carbon nanotube reinforced copper alloy composite materials blank is made in type, depanning；
D, degreasing, sintering: at a temperature of 110 DEG C, using Catalyzed by Oxalic Acid degreasing, oxalic acid purity >=99.6%, degreasing rate >= 7.3%.Then 2-4 hours sinter moldings, sintered density >=8.4g/cm are kept at a temperature of hydrogen atmosphere, 1040 DEG C3；
The key technical indexes of gained finished product has: density p >=8.4g/cm3, hardness Hv80-100HV0.3, yield strength σ s >=280Mpa, tensile strength >=400Mpa, conductivity IACS >=70%, thermal coefficient >=220W/mk, thermal expansion coefficient≤10 × 10-6℃-1。
(embodiment three)
The present invention, which has, provides a kind of formula of carbon nanotube reinforced copper-base alloy, including carbon nanotube, further includes CuCr1 Alloy powder and binder, the specification of nanotube are as follows: 12 μm of length, caliber 8nm, purity >=97%；CuCr1Alloy powder at Be divided into: the content of Cr is content≤0.13% of 0.94%, O, remaining ingredient is Cu element；CuCr1The specification of alloy powder Are as follows: D10 size distribution is 3.5 μm, and D50 size distribution is 9.5 μm, and D90 size distribution is 24 μm, and the binder is modeling matrix It is binder；
CuCr1Weight account for the 99.4% of total weight, the weight of carbon nanotube accounts for the 0.6% of total specific gravity.
The invention further relates to a kind of powder injection molding process, comprising the following steps:
A, it prepares feeding: above-mentioned carbon nanotube reinforced copper-base alloy being sufficiently mixed in three-dimensional mixer, is obtained Evenly dispersed carbon nanotube and CuCr1Alloy powder mixture；It is 190 ± 5 in temperature again by atmosphere protection mixing technology At DEG C, under argon gas protection, purity of argon >=99.999%, by carbon nanotube and CuCr1Alloy powder mixture, binder are kneaded 2-3 hours, gained feeding melting means was 1000-1200g/10min；
B, it is granulated: will be prepared by the feeding being kneaded in the preparation method of carbon nanotube acid bronze alloy by pelletizer The feeding raw material of the injection of fixed particle shape；
C, be injection moulded: by feeding raw material injection injector barrel in, then by nozzle of injector injection mold at Carbon nanotube reinforced copper alloy composite materials blank is made in type, depanning；
D, degreasing, sintering: at a temperature of 110 DEG C, using Catalyzed by Oxalic Acid degreasing, oxalic acid purity >=99.6%, degreasing rate >= 7.3%.Then 2-4 hours sinter moldings, sintered density >=8.4g/cm are kept at a temperature of hydrogen atmosphere, 1040 DEG C3；
The key technical indexes of gained finished product has: density p >=8.4g/cm3, hardness Hv80-100HV0.3, yield strength σ s >=280Mpa, tensile strength >=400Mpa, conductivity IACS >=70%, thermal coefficient >=220W/mk, thermal expansion coefficient≤10 × 10-6℃-1。
(example IV)
The present invention, which has, provides a kind of formula of carbon nanotube reinforced copper-base alloy, including carbon nanotube, further includes CuCr1 Alloy powder and binder, the specification of nanotube are as follows: 13 μm of length, caliber 7nm, purity >=97%；CuCr1Alloy powder at Be divided into: the content of Cr is the content 0.12% of 0.96%, O, remaining ingredient is Cu element；CuCr1The specification of alloy powder are as follows: D10 size distribution is 3.4 μm, and D50 size distribution is 9.2 μm, and D90 size distribution is 24 μm, and the binder is modeling matrix system Binder；
CuCr1Weight account for the 99.4% of total weight, the weight of carbon nanotube accounts for the 0.6% of total specific gravity.
The invention further relates to a kind of powder injection molding process, comprising the following steps:
A, it prepares feeding: above-mentioned carbon nanotube reinforced copper-base alloy being sufficiently mixed in three-dimensional mixer, is obtained Evenly dispersed carbon nanotube and CuCr1Alloy powder mixture；It is 190 ± 5 in temperature again by atmosphere protection mixing technology At DEG C, under argon gas protection, purity of argon >=99.999%, by carbon nanotube and CuCr1Alloy powder mixture, binder are kneaded 2-3 hours, gained feeding melting means was 1000-1200g/10min；
B, it is granulated: will be prepared by the feeding being kneaded in the preparation method of carbon nanotube acid bronze alloy by pelletizer The feeding raw material of the injection of fixed particle shape；
C, be injection moulded: by feeding raw material injection injector barrel in, then by nozzle of injector injection mold at Carbon nanotube reinforced copper alloy composite materials blank is made in type, depanning；
D, degreasing, sintering: at a temperature of 110 DEG C, using Catalyzed by Oxalic Acid degreasing, oxalic acid purity >=99.6%, degreasing rate >= 7.3%.Then 2-4 hours sinter moldings, sintered density >=8.4g/cm are kept at a temperature of hydrogen atmosphere, 1040 DEG C3；
The key technical indexes of gained finished product has: density p >=8.4g/cm3, hardness Hv80-100HV0.3, yield strength σ s >=280Mpa, tensile strength >=400Mpa, conductivity IACS >=70%, thermal coefficient >=220W/mk, thermal expansion coefficient≤10 × 10-6℃-1。
(embodiment five)
The present invention, which has, provides a kind of formula of carbon nanotube reinforced copper-base alloy, including carbon nanotube, further includes CuCr1 Alloy powder and binder, the specification of nanotube are as follows: 15 μm of length, caliber 7nm, purity >=97%；CuCr1Alloy powder at Be divided into: the content of Cr is the content 0.11% of 0.98%, O, remaining ingredient is Cu element；CuCr1The specification of alloy powder are as follows: D10 size distribution is 3.6 μm, and D50 size distribution is 9.5 μm, and D90 size distribution is 24.6 μm, and the binder is modeling matrix It is binder；
CuCr1Weight account for the 99.4% of total weight, the weight of carbon nanotube accounts for the 0.6% of total specific gravity.
The invention further relates to a kind of powder injection molding process, comprising the following steps:
A, it prepares feeding: above-mentioned carbon nanotube reinforced copper-base alloy being sufficiently mixed in three-dimensional mixer, is obtained Evenly dispersed carbon nanotube and CuCr1Alloy powder mixture；It is 190 ± 5 in temperature again by atmosphere protection mixing technology At DEG C, under argon gas protection, purity of argon >=99.999%, by carbon nanotube and CuCr1Alloy powder mixture, binder are kneaded 2-3 hours, gained feeding melting means was 1000-1200g/10min；
B, it is granulated: will be prepared by the feeding being kneaded in the preparation method of carbon nanotube acid bronze alloy by pelletizer The feeding raw material of the injection of fixed particle shape；
C, be injection moulded: by feeding raw material injection injector barrel in, then by nozzle of injector injection mold at Carbon nanotube reinforced copper alloy composite materials blank is made in type, depanning；
D, degreasing, sintering: at a temperature of 110 DEG C, using Catalyzed by Oxalic Acid degreasing, oxalic acid purity >=99.6%, degreasing rate >= 7.3%.Then 2-4 hours sinter moldings, sintered density >=8.4g/cm are kept at a temperature of hydrogen atmosphere, 1040 DEG C3；
The key technical indexes of gained finished product has: density p >=8.4g/cm3, hardness Hv80-100HV0.3, yield strength σ s >=280Mpa, tensile strength >=400Mpa, conductivity IACS >=70%, thermal coefficient >=220W/mk, thermal expansion coefficient≤10 × 10-6℃-1。
(embodiment six)
The present invention, which has, provides a kind of formula of carbon nanotube reinforced copper-base alloy, including carbon nanotube, further includes CuCr1 Alloy powder and binder, the specification of nanotube are as follows: 18 μm of length, caliber 9nm, purity >=97%；CuCr1Alloy powder at Be divided into: the content of Cr is the content 0.1% of 1%, O, remaining ingredient is Cu element；CuCr1The specification of alloy powder are as follows: D10 Size distribution is 3.6 μm, and D50 size distribution is 9.4 μm, and D90 size distribution is 24.8 μm, and the binder is that modeling matrix system is viscous Tie agent；
CuCr1Weight account for the 99.4% of total weight, the weight of carbon nanotube accounts for the 0.6% of total specific gravity.
The invention further relates to a kind of powder injection molding process, comprising the following steps:
A, it prepares feeding: above-mentioned carbon nanotube reinforced copper-base alloy being sufficiently mixed in three-dimensional mixer, is obtained Evenly dispersed carbon nanotube and CuCr1Alloy powder mixture；It is 190 ± 5 in temperature again by atmosphere protection mixing technology At DEG C, under argon gas protection, purity of argon >=99.999%, by carbon nanotube and CuCr1Alloy powder mixture, binder are kneaded 2-3 hours, gained feeding melting means was 1000-1200g/10min；
B, it is granulated: will be prepared by the feeding being kneaded in the preparation method of carbon nanotube acid bronze alloy by pelletizer The feeding raw material of the injection of fixed particle shape；
C, be injection moulded: by feeding raw material injection injector barrel in, then by nozzle of injector injection mold at Carbon nanotube reinforced copper alloy composite materials blank is made in type, depanning；
D, degreasing, sintering: at a temperature of 110 ± 10 DEG C, using Catalyzed by Oxalic Acid degreasing, oxalic acid purity >=99.6%, degreasing Rate >=7.3%.Then 2-4 hours sinter moldings, sintered density >=8.4g/ are kept at a temperature of hydrogen atmosphere, 1040 ± 5 DEG C cm3；
The key technical indexes of gained finished product has: density p >=8.4g/cm3, hardness Hv80-100HV0.3, yield strength σ s >=280Mpa, tensile strength >=400Mpa, conductivity IACS >=70%, thermal coefficient >=220W/mk, thermal expansion coefficient≤10 × 10-6℃-1。
(embodiment seven)
The present invention, which has, provides a kind of formula of carbon nanotube reinforced copper-base alloy, including carbon nanotube, further includes CuCr1 Alloy powder and binder, the specification of nanotube are as follows: 22 μm of length, caliber 8nm, purity >=97%；CuCr1Alloy powder at Be divided into: the content of Cr is content≤0.09% of 1.02%, O, remaining ingredient is Cu element；CuCr1The specification of alloy powder Are as follows: D10 size distribution is 3-4 μm, and D50 size distribution is 9-10 μm, and D90 size distribution is 24.3 μm, and the binder is modeling Matrix system binder；
CuCr1Weight account for the 99.4% of total weight, the weight of carbon nanotube accounts for the 0.6% of total specific gravity.
The invention further relates to a kind of powder injection molding process, comprising the following steps:
A, it prepares feeding: above-mentioned carbon nanotube reinforced copper-base alloy being sufficiently mixed in three-dimensional mixer, is obtained Evenly dispersed carbon nanotube and CuCr1Alloy powder mixture；It is 190 ± 5 in temperature again by atmosphere protection mixing technology At DEG C, under argon gas protection, purity of argon >=99.999%, by carbon nanotube and CuCr1Alloy powder mixture, binder are kneaded 2-3 hours, gained feeding melting means was 1000-1200g/10min；
B, it is granulated: will be prepared by the feeding being kneaded in the preparation method of carbon nanotube acid bronze alloy by pelletizer The feeding raw material of the injection of fixed particle shape；
C, be injection moulded: by feeding raw material injection injector barrel in, then by nozzle of injector injection mold at Carbon nanotube reinforced copper alloy composite materials blank is made in type, depanning；
D, degreasing, sintering: at a temperature of 110 DEG C, using Catalyzed by Oxalic Acid degreasing, oxalic acid purity >=99.6%, degreasing rate >= 7.3%.Then 2-4 hours sinter moldings, sintered density >=8.4g/cm are kept at a temperature of hydrogen atmosphere, 1040 DEG C3；
The key technical indexes of gained finished product has: density p >=8.4g/cm3, hardness Hv80-100HV0.3, yield strength σ s >=280Mpa, tensile strength >=400Mpa, conductivity IACS >=70%, thermal coefficient >=220W/mk, thermal expansion coefficient≤10 × 10-6℃-1。
(embodiment eight)
The present invention, which has, provides a kind of formula of carbon nanotube reinforced copper-base alloy, including carbon nanotube, further includes CuCr1 Alloy powder and binder, the specification of nanotube are as follows: 24 μm of length, caliber 8nm, purity >=97%；CuCr1Alloy powder at Be divided into: the content of Cr is the content 0.08% of 1.06%, O, remaining ingredient is Cu element；CuCr1The specification of alloy powder are as follows: D10 size distribution is 3.8 μm, and D50 size distribution is 9.2 μm, and D90 size distribution is 24.6 μm, and the binder is modeling matrix It is binder；
CuCr1Weight account for the 99.4% of total weight, the weight of carbon nanotube accounts for the 0.6% of total specific gravity.
The invention further relates to a kind of powder injection molding process, comprising the following steps:
A, it prepares feeding: above-mentioned carbon nanotube reinforced copper-base alloy being sufficiently mixed in three-dimensional mixer, is obtained Evenly dispersed carbon nanotube and CuCr1Alloy powder mixture；It is 190 ± 5 in temperature again by atmosphere protection mixing technology At DEG C, under argon gas protection, purity of argon >=99.999%, by carbon nanotube and CuCr1Alloy powder mixture, binder are kneaded 2-3 hours, gained feeding melting means was 1000-1200g/10min；
B, it is granulated: will be prepared by the feeding being kneaded in the preparation method of carbon nanotube acid bronze alloy by pelletizer The feeding raw material of the injection of fixed particle shape；
C, be injection moulded: by feeding raw material injection injector barrel in, then by nozzle of injector injection mold at Carbon nanotube reinforced copper alloy composite materials blank is made in type, depanning；
D, degreasing, sintering: at a temperature of 110 DEG C, using Catalyzed by Oxalic Acid degreasing, oxalic acid purity >=99.6%, degreasing rate >= 7.3%.Then 2-4 hours sinter moldings, sintered density >=8.4g/cm are kept at a temperature of hydrogen atmosphere, 1040 DEG C3；
The key technical indexes of gained finished product has: density p >=8.4g/cm3, hardness Hv80-100HV0.3, yield strength σ s >=280Mpa, tensile strength >=400Mpa, conductivity IACS >=70%, thermal coefficient >=220W/mk, thermal expansion coefficient≤10 × 10-6℃-1。
(embodiment nine)
The present invention, which has, provides a kind of formula of carbon nanotube reinforced copper-base alloy, including carbon nanotube, further includes CuCr1 Alloy powder and binder, the specification of nanotube are as follows: 25 μm of length, caliber 7nm, purity >=97%；CuCr1Alloy powder at Be divided into: the content of Cr is content≤0.06% of 1.08%, O, remaining ingredient is Cu element；CuCr1The specification of alloy powder Are as follows: D10 size distribution is 3.6 μm, and D50 size distribution is 9.3 μm, and D90 size distribution is 24.9 μm, and the binder is modeling base System binder；
CuCr1Weight account for the 99.4% of total weight, the weight of carbon nanotube accounts for the 0.6% of total specific gravity.
The invention further relates to a kind of powder injection molding process, comprising the following steps:
A, it prepares feeding: above-mentioned carbon nanotube reinforced copper-base alloy being sufficiently mixed in three-dimensional mixer, is obtained Evenly dispersed carbon nanotube and CuCr1Alloy powder mixture；It is 190 ± 5 in temperature again by atmosphere protection mixing technology At DEG C, under argon gas protection, purity of argon >=99.999%, by carbon nanotube and CuCr1Alloy powder mixture, binder are kneaded 2-3 hours, gained feeding melting means was 1000-1200g/10min；
B, it is granulated: will be prepared by the feeding being kneaded in the preparation method of carbon nanotube acid bronze alloy by pelletizer The feeding raw material of the injection of fixed particle shape；
C, be injection moulded: by feeding raw material injection injector barrel in, then by nozzle of injector injection mold at Carbon nanotube reinforced copper alloy composite materials blank is made in type, depanning；
D, degreasing, sintering: at a temperature of 110 DEG C, using Catalyzed by Oxalic Acid degreasing, oxalic acid purity >=99.6%, degreasing rate >= 7.3%.Then 2-4 hours sinter moldings, sintered density >=8.4g/cm are kept at a temperature of hydrogen atmosphere, 1040 DEG C3；
The key technical indexes of gained finished product has: density p >=8.4g/cm3, hardness Hv80-100HV0.3, yield strength σ s >=280Mpa, tensile strength >=400Mpa, conductivity IACS >=70%, thermal coefficient >=220W/mk, thermal expansion coefficient≤10 × 10-6℃-1。
(embodiment ten)
The present invention, which has, provides a kind of formula of carbon nanotube reinforced copper-base alloy, including carbon nanotube, further includes CuCr1 Alloy powder and binder, the specification of nanotube are as follows: 26 μm of length, caliber 9nm, purity >=97%；CuCr1Alloy powder at Be divided into: the content of Cr is the content 0.14% of 1.1%, O, remaining ingredient is Cu element；CuCr1The specification of alloy powder are as follows: D10 size distribution is 3.8 μm, and D50 size distribution is 9.1 μm, and D90 size distribution is 25 μm, and the binder is modeling matrix system Binder；
CuCr1Weight account for the 99.4% of total weight, the weight of carbon nanotube accounts for the 0.6% of total specific gravity.
The invention further relates to a kind of powder injection molding process, comprising the following steps:
A, it prepares feeding: above-mentioned carbon nanotube reinforced copper-base alloy being sufficiently mixed in three-dimensional mixer, is obtained Evenly dispersed carbon nanotube and CuCr1Alloy powder mixture；It is 190 ± 5 in temperature again by atmosphere protection mixing technology At DEG C, under argon gas protection, purity of argon >=99.999%, by carbon nanotube and CuCr1Alloy powder mixture, binder are kneaded 2-3 hours, gained feeding melting means was 1000-1200g/10min；
B, it is granulated: will be prepared by the feeding being kneaded in the preparation method of carbon nanotube acid bronze alloy by pelletizer The feeding raw material of the injection of fixed particle shape；
C, be injection moulded: by feeding raw material injection injector barrel in, then by nozzle of injector injection mold at Carbon nanotube reinforced copper alloy composite materials blank is made in type, depanning；
D, degreasing, sintering: at a temperature of 110 ± 10 DEG C, using oxalic acid (purity >=99.6%) catalysis degreasing, degreasing rate >= 7.3%.Then 2-4 hours sinter moldings, sintered density >=8.4g/cm are kept at a temperature of hydrogen atmosphere, 1040 ± 5 DEG C3；
The key technical indexes of gained finished product has: density p >=8.4g/cm3, hardness Hv80-100HV0.3, yield strength σ s >=280Mpa, tensile strength >=400Mpa, conductivity IACS >=70%, thermal coefficient >=220W/mk, thermal expansion coefficient≤10 × 10-6℃-1。
Particular embodiments described above has carried out into one the purpose of the invention patent, technical scheme and beneficial effects Step is described in detail, it should be understood that being not limited to this foregoing is merely the specific embodiment of the invention patent Patent of invention, all within the spirit and principle of the invention patent, any modification, equivalent substitution, improvement and etc. done should all wrap Containing within the scope of protection of the patent of the invention.

Claims (3)

1. a kind of formula of carbon nanotube reinforced copper-base alloy, including carbon nanotube, it is characterised in that: further include CuCr1Alloyed powder End, the specification of the nanotube are as follows: 10-30 μm of length, caliber 5-10nm, purity >=97%；The CuCr1Alloy powder at Be divided into: the content of Cr is 0.9-1.1%, and content≤0.15% of O, remaining ingredient is Cu element；The CuCr1Alloy powder Specification are as follows: D10 size distribution be 3-4 μm, D50 size distribution be 9-10 μm, D90 size distribution be 24.0-25 μm；
CuCr1Weight account for the 99.4% of total weight, the weight of carbon nanotube accounts for the 0.6% of total specific gravity.
2. a kind of preparation method of carbon nanotube acid bronze alloy according to claim 1, it is characterised in that: the binder For a kind of modeling matrix system binder.
3. a kind of powder injection molding process, it is characterised in that the following steps are included:
A, it prepares feeding: the carbon nanotube reinforced copper-base alloy in claim 1 is sufficiently mixed in three-dimensional mixer, Obtain evenly dispersed carbon nanotube and CuCr1Alloy powder mixture；Again by atmosphere protection mixing technology, it is in temperature At 190 ± 5 DEG C, under argon gas protection, purity >=99.999% of argon gas, by carbon nanotube and CuCr1Alloy powder mixture is glued It ties agent to be kneaded 2-3 hours, gained feeding melting means is 1000-1200g/10min；
B, it is granulated: fixation will be prepared by the feeding being kneaded in the preparation method of carbon nanotube acid bronze alloy by pelletizer The feeding raw material of the injection of particle shape；
C, it is injection moulded: by the barrel of feeding raw material injection injector, die for molding then being injected by nozzle of injector, out Mould to obtain carbon nanotube reinforced copper alloy composite materials blank；
D, degreasing, sintering: at a temperature of 110 ± 10 DEG C, using oxalic acid purity by blank catalysis degreasing, oxalic acid purity >= 99.6%, 2-4 hours sinter moldings are then kept at a temperature of hydrogen atmosphere, 1040 ± 5 DEG C.
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