CN106756207B - A kind of short flow process of high-strength highly-conductive deformation Cu-Cr-Ag in-situ composite - Google Patents
A kind of short flow process of high-strength highly-conductive deformation Cu-Cr-Ag in-situ composite Download PDFInfo
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- CN106756207B CN106756207B CN201611087235.4A CN201611087235A CN106756207B CN 106756207 B CN106756207 B CN 106756207B CN 201611087235 A CN201611087235 A CN 201611087235A CN 106756207 B CN106756207 B CN 106756207B
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C9/00—Alloys based on copper
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- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
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Abstract
A kind of short flow process of high-strength highly-conductive deformation Cu-Cr-Ag in-situ composite, its step are as follows: (1) using the method founding Cu-Cr-Ag ternary alloy three-partalloy ingot casting of Medium frequency induction melting combination graphite mo(u)ld casting；(2) ingot casting is put into zone refining-directional solidification furnace and is oriented solidification processing, Cr dendrite is made to be axially formed the micro nano-scale fiber aligned；(3) multi-pass cold drawing deformation is carried out to the material of oriented solidification processing, the micro nano-scale fiber formed during directional solidification is made further to be refined into nano-scale fiber；(4) comprehensive regulation is carried out to intensity, conductivity and elongation percentage of material etc. using final aging strengthening model.The present invention, which controls to be formed by as-cast structure, continuously aligns micro nano-scale fiber, in conjunction with cold drawing deformation, alloying and final aging strengthening model, shorten preparation process flow, reduce cold deformation dependent variable, significantly increase the size of final material, and it is stable and good using comprehensive performance to obtain final material, can widen deformation Cu base in-situ composite in the application range of high-technology field.
Description
Technical field
The invention belongs to the preparation technical fields of nonferrous materials, more particularly to a kind of large scale high-strength highly-conductive deformation
The short flow process of Cu-Cr-Ag in-situ composite.
Background technique
The development of modern science and technology proposes increasingly higher demands to the properties of conductive material, in high-strength magnetic field
Many applications such as coil, large-scale integrated circuit lead frame and high-speed electric railway contact line, do not require nothing more than conduction
Material has high conductivity, also requires material tensile strength with higher and elongation percentage.Currently, deformation in-situ composite algorithm is
The optimal method of high-strength highly-conductive Cu sill is prepared, the second phase is formed in situ by casting technology in it in cast alloy, and
Second in the alloy machine direction that hands down is set to form the fiber that aligns through large plastometric set, wherein fiber is mutually the master of load
The undertaker is wanted, Cu matrix mainly plays conductive channel.Existing deformation in-situ composite algorithm research be mostly focused on Cu-Nb,
The alloys such as Cu-Ag, Cu-Fe and Cu-Cr, Nb and Ag belong to noble metal, make respective material industrialized production and commercial applications by
To limitation, high temperature solid solution degree of the Fe in Cu matrix is slow compared with high and low temperature diffusion velocity, and the Fe atom being solid-solution in Cu matrix is tight
The conductivity of material is damaged again.Deformation Cu-Cr system's in-situ composite due to the liquid miscibility gap of the second phase Cr and Cu is small, at
This is lower, strengthening effect is good and causes the extensive concern of scientific workers.
The main preparation process of deformation Cu-Cr system in-situ composite is usually: Medium frequency induction melting, casting, long-time
Conditioning treatment or solution treatment, hot rolling, the big plasticity cold deformation of interspersed intermediate heat-treatment, final heat treatment etc..Wherein, preparation
Heat treatment is to reduce deformation to eliminate or reduce the nonequilibrium freezings such as caused uneven components organizational effect in casting process
Drag；Hot rolling is the microdefect in order to eliminate or reduce as-cast structure, is crushed the second phase dendrite, it is made to be changed into tiny
Granular or rod-like phase；Big plasticity cold deformation is the second broken phase dendrite in order to make disorder distribution in as-cast structure, gradually
It is transformed into the fiber aligned along machine direction；Intermediate heat-treatment appropriate is to eliminate or reduce big plasticity cold deformation and draw
The residual stress risen, in favor of further cold deformation；Final heat treatment is to promote the precipitation for being dissolved Cr atom to improve material
Conductivity.The fiber of this preparation method is mutually broken by large plastometric set and the second phase Cr dendrite of refinement obtains, fine
Tie up poor continuity, it is difficult to guarantee the stability of material comprehensive performance under various applications.In addition, in order to obtain high intensity, it should
It is even higher that the big plasticity cold deformation dependent variable of class material often reaches 10.It is above-mentioned to existing deformation Cu-Cr system In-situ reaction material
Preparation method for material analysis shows, this method complex process, long flow path, heat, cold deformation dependent variable it is big, the section ruler of final material
The materials'use comprehensive performance of very little very little, fiber poor continuity, preparation is unstable.Therefore, it is highly desirable to develop a kind of new
Large scale high-strength highly-conductive deformation Cu-Cr system in-situ composite and preparation method thereof simplifies the preparation process of material, shortens material
Preparation flow, obtain the material of big sectional dimension, the continuity of reinforcing fiber improves the use comprehensive performance of material.
Summary of the invention
For deficiency existing for existing deformation Cu-Cr in-situ composite and technology of preparing, the present invention provides a kind of high-strength
Height leads the short flow process of deformation Cu-Cr-Ag in-situ composite, combines directional solidification and cold drawing deformation, significantly
It reduces cold deformation dependent variable, shorten process flow, dramatically increase the sectional dimension of final material, it is fine to form continuous reinforced phase
Dimension, improves the use comprehensive performance of material.
Specific step is as follows for the used technical solution of the present invention:
1, the method founding Cu-Cr-Ag ternary alloy three-partalloy ingot casting being poured using Medium frequency induction melting combination graphite mo(u)ld；
2, ingot casting is put into zone refining-directional solidification furnace and is oriented solidification processing, be axially formed Cr dendrite
The micro nano-scale fiber aligned；
3, multi-pass cold drawing deformation is carried out to the material of oriented solidification processing, makes to be formed during directional solidification micro-
Nano-scale fiber is refined into nano-scale fiber；
4, comprehensive regulation is carried out to intensity, conductivity and elongation percentage of material etc. using final aging strengthening model.
Cu-Cr-Ag ternary alloy three-partalloy described in above-mentioned steps 1, formula components form following (by mass percentage):
Chromium is 6-30；Silver is 0.008-0.200；Copper is surplus.
Directional solidification described in above-mentioned steps 2 processing, specifically: by Cu-Cr-Ag alloy cast ingot be put into internal layer be coated with it is resistance to
The Al that the purity of high temperature inert coating is 99.99%2O3In two logical ceramic tubes, by ceramic tube feeding area melting-directional solidification furnace
In, melting is carried out in the high-purity argon gas atmosphere of 300-400Pa by high frequency induction power supply, after fusing, alloy melt is with ceramics
Pipe is moved down simultaneously with the speed of 50-300 μm/s simultaneously by gallium-indium alloy liquid cooling under the action of pedestal and pull-out mechanism together
But, directional solidification ingot casting is formed.
Multi-pass cold drawing deformation described in above-mentioned steps 3, specifically: it carries out at room temperature, total cold deformation dependent variable is small
In or equal to 6.
Final aging strengthening model described in above-mentioned steps 4, specifically: 200-650 DEG C inside holding 0.5-8 hours, so
After cool to room temperature with the furnace.
The present invention has the advantages that (1) adds micro Ag in Cu-Cr bianry alloy, Cr is reduced in Cu matrix
Solid solubility improves the conductivity of material；(2) micro nano-scale fiber continuously aligned is obtained using directional solidification processing,
Cold deformation dependent variable is reduced, the sectional dimension of final material is increased；(3) by directional solidification processing in conjunction with cold deformation, be not required into
Row conditioning treatment and multiple intermediate heat-treatment, simplify process flow；(4) final aging strengthening model is used, according to practical need
The intensity, conductivity and elongation percentage etc. for wanting controlled material make final material that there is stabilization to use comprehensive performance with good.
Specific embodiment
Embodiment 1
(1) fine copper for weighing pure chromium 6%, fine silver 0.008% and surplus respectively by mass percentage, is put into intermediate frequency furnace
Melting simultaneously pours into ingot casting with graphite mo(u)ld；
(2) ingot casting is put into internal layer and is coated with the Al that the purity of high temperature resistant inert coatings is 99.99%2O3In two logical ceramic tubes,
By in ceramic tube feeding area melting-directional solidification furnace, carried out in the high-purity argon gas atmosphere of 300Pa by high frequency induction power supply
Melting, after fusing, alloy melt with ceramic tube pedestal under the action of pull-out mechanism with the speed of 50 μm/s to moving down
It is dynamic and simultaneously by gallium-indium alloy liquid cooling but, form directional solidification ingot casting；
(3) directional solidification ingot casting is subjected to multi-pass cold drawing deformation at room temperature, total cold deformation dependent variable is 6；
(4) by the material of cold drawing deformation 200 DEG C inside holding 8 hours, then cool to room temperature with the furnace, obtain high-strength highly-conductive
Deformation Cu-Cr-Ag in-situ composite.
916 MPa of tensile strength of deformation Cu-Cr-Ag in-situ composite manufactured in the present embodiment, conductivity 82.1%
IACS, elongation percentage 4.1%.
Embodiment 2
(1) fine copper for weighing pure chromium 15%, fine silver 0.06% and surplus respectively by mass percentage, is put into intermediate frequency furnace
Melting simultaneously pours into ingot casting with graphite mo(u)ld；
(2) ingot casting is put into internal layer and is coated with the Al that the purity of high temperature resistant inert coatings is 99.99%2O3In two logical ceramic tubes,
By in ceramic tube feeding area melting-directional solidification furnace, carried out in the high-purity argon gas atmosphere of 350Pa by high frequency induction power supply
Melting, after fusing, alloy melt with ceramic tube pedestal under the action of pull-out mechanism with the speed of 100 μm/s to moving down
It is dynamic and simultaneously by gallium-indium alloy liquid cooling but, form directional solidification ingot casting；
(3) directional solidification ingot casting is subjected to multi-pass cold drawing deformation at room temperature, total cold deformation dependent variable is 5.5；
(4) by the material of cold drawing deformation 400 DEG C inside holding 2 hours, then cool to room temperature with the furnace, obtain high-strength highly-conductive
Deformation Cu-Cr-Ag in-situ composite.
The tensile strength 1237MPa of deformation Cu-Cr-Ag in-situ composite manufactured in the present embodiment, conductivity 81.2%
IACS, elongation percentage 3.9%.
Embodiment 3
(1) fine copper for weighing pure chromium 20%, fine silver 0.12% and surplus respectively by mass percentage, is put into intermediate frequency furnace
Melting simultaneously pours into ingot casting with graphite mo(u)ld；
(2) ingot casting is put into internal layer and is coated with the Al that the purity of high temperature resistant inert coatings is 99.99%2O3In two logical ceramic tubes,
By in ceramic tube feeding area melting-directional solidification furnace, carried out in the high-purity argon gas atmosphere of 350Pa by high frequency induction power supply
Melting, after fusing, alloy melt with ceramic tube pedestal under the action of pull-out mechanism with the speed of 200 μm/s to moving down
It is dynamic and simultaneously by gallium-indium alloy liquid cooling but, form directional solidification ingot casting；
(3) directional solidification ingot casting is subjected to multi-pass cold drawing deformation at room temperature, total cold deformation dependent variable is 5.5；
(4) by the material of cold drawing deformation 550 DEG C inside holding 1 hour, then cool to room temperature with the furnace, obtain high-strength highly-conductive
Deformation Cu-Cr-Ag in-situ composite.
The tensile strength 1369MPa of deformation Cu-Cr-Ag in-situ composite manufactured in the present embodiment, conductivity 80.4%
IACS, elongation percentage 3.7%.
Embodiment 4
(1) fine copper for weighing pure chromium 30%, fine silver 0.2% and surplus respectively by mass percentage, is put into intermediate frequency furnace
Melting simultaneously pours into ingot casting with graphite mo(u)ld；
(2) ingot casting is put into internal layer and is coated with the Al that the purity of high temperature resistant inert coatings is 99.99%2O3In two logical ceramic tubes,
By in ceramic tube feeding area melting-directional solidification furnace, carried out in the high-purity argon gas atmosphere of 400Pa by high frequency induction power supply
Melting, after fusing, alloy melt with ceramic tube pedestal under the action of pull-out mechanism with the speed of 300 μm/s to moving down
It is dynamic and simultaneously by gallium-indium alloy liquid cooling but, form directional solidification ingot casting；
(3) directional solidification ingot casting is subjected to multi-pass cold drawing deformation at room temperature, total cold deformation dependent variable is 5；
(4) by the material of cold drawing deformation 650 DEG C inside holding 0.5 hour, then cool to room temperature with the furnace, obtain high-strength height
Lead deformation Cu-Cr-Ag in-situ composite.
1461 MPa of tensile strength of deformation Cu-Cr-Ag in-situ composite manufactured in the present embodiment, conductivity 78.9%
IACS, elongation percentage 3.4%.
Claims (2)
1. a kind of short flow process of high-strength highly-conductive deformation Cu-Cr-Ag in-situ composite, it is characterised in that including following
Step:
(1) using the method founding Cu-Cr-Ag ternary alloy three-partalloy ingot casting of Medium frequency induction melting combination graphite mo(u)ld casting, Cu-Cr-Ag
The formula components composition of ternary alloy three-partalloy is as follows, by mass percentage: chromium 6-30；Silver is 0.008-0.200；Copper is surplus；
(2) ingot casting is put into zone refining-directional solidification furnace and is oriented solidification processing, specifically: by Cu-Cr-Ag alloy
Ingot casting is put into internal layer and is coated with the Al that the purity of high temperature resistant inert coatings is 99.99%2O3In two logical ceramic tubes, by ceramic tube loading area
In domain melting-directional solidification furnace, melting is carried out in the high-purity argon gas atmosphere of 300-400Pa by high frequency induction power supply, is melted
Afterwards, alloy melt is moved down with ceramic tube under the action of pedestal and pull-out mechanism with the speed of 50-300 μm/s simultaneously same
When by gallium-indium alloy liquid cooling but, form the directional solidification ingot casting of micro nano-scale fiber arranged axially directed containing Cr dendrite；
(3) multi-pass cold drawing deformation is carried out to the material of oriented solidification processing, makes the micro-nano formed during directional solidification
Meter level fiber is further refined into nano-scale fiber；
(4) comprehensive regulation is carried out to the intensity, conductivity and elongation percentage of material using final aging strengthening model, at final timeliness heat
Reason carries out in 200-650 DEG C, keeps the temperature 0.5-8 hours, then cools to room temperature with the furnace.
2. a kind of short route preparation side of high-strength highly-conductive deformation Cu-Cr-Ag in-situ composite according to claim 1
Method, it is characterised in that in step (3), multi-pass cold drawing deformation carries out at room temperature, and total cold deformation dependent variable is less than or equal to 6.
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| CN109518035B (en) * | 2019-01-10 | 2020-02-21 | 江西理工大学 | Preparation method and application of directionally solidified Cu-Cr alloy without banded structure |
| CN113073227B (en) * | 2021-03-25 | 2022-02-01 | 南昌工程学院 | Preparation method of high-conductivity deformed Cu-Fe series in-situ composite material |
| CN113073223B (en) * | 2021-03-25 | 2022-03-01 | 南昌工程学院 | Preparation method of graphene deformation Cu-Cr series in-situ composite material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100999793A (en) * | 2007-01-12 | 2007-07-18 | 焦作市森格高新材料有限责任公司 | High strength, high electroconductive copper alloy material and preparation tech. thereof |
| CN103456385A (en) * | 2013-09-04 | 2013-12-18 | 江西理工大学 | High-strength and high-conductivity Cu-Cr-Ti alloy conductor and manufacturing method thereof |
| CN104762520A (en) * | 2015-04-08 | 2015-07-08 | 江西理工大学 | High-strength high-conductivity Cu-Fe-Ag in-situ composite material prepared by using directional solidification and method for preparing same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100999793A (en) * | 2007-01-12 | 2007-07-18 | 焦作市森格高新材料有限责任公司 | High strength, high electroconductive copper alloy material and preparation tech. thereof |
| CN103456385A (en) * | 2013-09-04 | 2013-12-18 | 江西理工大学 | High-strength and high-conductivity Cu-Cr-Ti alloy conductor and manufacturing method thereof |
| CN104762520A (en) * | 2015-04-08 | 2015-07-08 | 江西理工大学 | High-strength high-conductivity Cu-Fe-Ag in-situ composite material prepared by using directional solidification and method for preparing same |
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