CN109457138A - A kind of preparation method of high-strength Kumium alloy - Google Patents
A kind of preparation method of high-strength Kumium alloy Download PDFInfo
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- CN109457138A CN109457138A CN201910027519.1A CN201910027519A CN109457138A CN 109457138 A CN109457138 A CN 109457138A CN 201910027519 A CN201910027519 A CN 201910027519A CN 109457138 A CN109457138 A CN 109457138A
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- chromiumcopper
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- kumium
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- 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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- 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
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/026—Alloys based on copper
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Abstract
The invention discloses a kind of preparation methods of high-strength Kumium alloy, belong to field of alloy preparation technology.Cold work process in the present invention are as follows: cooling bath will be fixed on by solution treatment with a thickness of the chromiumcopper plate of 2~8mm, cooling medium is poured into cooling bath, and remains that chromiumcopper plate cooled medium submerged state completes subsequent cooling processing；After the temperature of chromiumcopper plate is cooled to -196 DEG C~-20 DEG C, using the tool heads with dead axle shoulder and movable mixing needle, mixing needle pierces inside workpiece by the revolving speed rotation of 400~1500rpm, until dead axle shoulder and chromiumcopper plate surface completely attach to；With aftertable with the feed motion forward of the travel speed of 20~100mm/min, the processing of a time is completed.The present invention is with high in machining efficiency, processing cost is low, green non-pollution, can obtain agglomerate body chromiumcopper material；The material structure has high-intensitive, high conductivity and high thermal structure stability.
Description
Technical field:
The invention belongs to field of alloy preparation technology, are related to a kind of preparation method of fine grain chromiumcopper.
Technical background:
A kind of electrical material of the high-strength and high-conductivity chromiumcopper as high comprehensive performance is widely used in advising greatly
Vlsi die lead frame, electrical engineering switches conductive contact, pulse magnetic field conductor and electric railway contact wire etc..
It is main method using multi-element alloyed and precipitation strength currently, improving in the various methods of such alloy strength and conductivity,
Mostly between 350~650MPa, conductivity adds the alloy strength obtained using such method between 80~90%IACS
It is higher that the expensive rare metal entered will lead to cost of goods manufactured.Followed by composite material method, using in-situ authigenic hardening constituent or
Additional reinforced phase improves alloy strength and thermal stability, but conductivity is not generally high, and there is also manufacturing cost height
The problem of.
In recent years, refined crystalline strengthening has become the research hotspot in the field.Such as there is nano twin crystal using electro-deposition preparation
Fine copper obtains superhigh intensity and high conductivity, but such method it is subject to conditions and can not mass production application.Using tight
Remoldability deforms and cooperates subsequent anneal or ageing treatment to realize refined crystalline strengthening then and have stronger application prospect.Wherein, sharp
It is common large deformation method with Equal Channel Angular Pressing, heavy reduction cold rolling, high pressure torsion etc..Although such method can be mentioned effectively
High alloy intensity, but in subsequent anneal or ageing treatment, easily generation crystal grain grows up and strengthening effect is weakened, simultaneously
Because mode of texturing limitation causes shape of product to be restricted.
Summary of the invention:
The present invention provides a kind of preparation methods of high-strength Kumium alloy, it is intended to be directed to widely applied copper chromium
The problem of alloy and its existing processing method, is proposed to be cooperated using low temperature mixing yoghurt under subsequent proper temperature and be moved back
Fire processing process, obtain Ultra-fine Grained and intercrystalline precipitation simple substance chromium matter point institutional framework, with it is high in machining efficiency,
Processing cost is low, green non-pollution, can obtain agglomerate body chromiumcopper material；The material structure has high-intensitive, high conductance
Rate and high thermal structure stability.
Specific technical solution provided by the present invention is that procedure of processing is as follows: a kind of system of high-strength Kumium alloy
Preparation Method, including solution treatment, cold working and ageing treatment, which is characterized in that cold work process are as follows:
It will be fixed on cooling bath with a thickness of the chromiumcopper plate of 2~8mm by solution treatment, is poured into cooling bath
Cooling medium, and remain that chromiumcopper plate cooled medium submerged state completes subsequent cooling processing；In chromiumcopper
After the temperature of plate is cooled to -196 DEG C~-20 DEG C, using the tool heads with dead axle shoulder and movable mixing needle, mixing needle is pressed
The revolving speed rotation of 400~1500rpm pierces inside workpiece, until dead axle shoulder and chromiumcopper plate surface completely attach to；Then
Workbench completes the processing of a time with the feed motion forward of the travel speed of 20~100mm/min；Using multi-pass, overlapped
Method completes entire cooling process；
Wherein, the diameter of dead axle shoulder is 10~20mm, and it is highly 2 that the diameter that mixing needle is inserted into workpiece portion, which is 4~8mm,
~8mm.
A further technical solution lies in the chromiumcopper plate chemical component is by mass percentage are as follows: chromium 0.3-
1.0%, zirconium 0.05-0.3%, surplus is copper.
A further technical solution lies in the solution treatment is that copper alloy plate is heated to 950~1000 DEG C, heat preservation
Water quenching is carried out after 60~150min, obtains oversaturated solution treatment.
It is to carry out low-temperature annealing processing a further technical solution lies in, the ageing treatment, annealing temperature is 400~
550 DEG C, soaking time is 20~40min.
A further technical solution lies in the cooling medium is liquid nitrogen, liquid nitrogen and crude alcohol mixture or dry ice and alcohol
Mixture.
The invention has the following advantages over the prior art:
1, easily prepared agglomerate body chromiumcopper material does not change the global shape of copper alloy plate in process.
2, the processing method nanometer precipitated phase is precipitated in the crystal boundary of fine grained texture, and the intensity of chromiumcopper is compared with other processing sides
Fa Genggao, electric conductivity are more preferable with structure stability.
3, the processing method not only makes chromiumcopper have high intensity and electric conductivity, while wearability with higher.
4, processing method is high-efficient, and controllability is good, and the mixing yoghurt technological treatment that the present invention uses is simple, easily
In control processing parameters and deformation temperature.
Detailed description of the invention:
Fig. 1 is low temperature mixing yoghurt device figure.
Fig. 2 is that chromiumcopper TEM figure prepared by embodiment 1 counts histogram with crystallite dimension.
Fig. 3 is that embodiment 1 prepares tissue T EM figure and crystallite dimension statistics histogram after chromiumcopper annealing.
Fig. 4 is the hardness, intensity and distribution of conductivity figure that embodiment 1 prepares chromiumcopper.
1, tool heads；2, dead axle shoulder 3, workpiece to be machined；4, cooling medium；5, cooling bath；6, friction stir welding machine works
Platform.
Specific embodiment:
Disclosure sets forth a kind of preparation methods of high-strength Kumium alloy, the specific steps of which are as follows:
1, by the solution treatment before being processed with a thickness of 2~8mm chromiumcopper plate, i.e., plate is heated to 950~
Water quenching after 1000 DEG C of 60~150min of heat preservation, so that oversaturated solid solution body tissue.
2, the chromiumcopper plate after solution treatment is bolted in cooling bath.
3, using the tool heads with dead axle shoulder and movable mixing needle, the diameter of dead axle shoulder is generally 10~20mm, stirring
The diameter that needle is inserted into workpiece portion is 4~8mm, is highly 2~8mm.
4, before processing then mixing needle and workpiece machining surface joint are poured into cooling medium into cooling bath.It is cooling
Medium is generally liquid nitrogen, liquid nitrogen and crude alcohol mixture or dry ice and crude alcohol mixture, and cooling medium will submerge on workpiece to be machined
Surface.
5, reach after cooling temperature range is -196 DEG C~-20 DEG C wait be processed the temperature of plate, mixing needle by 400~
The revolving speed rotation of 1500rpm pierces inside workpiece, until dead axle shoulder and work piece surface completely attach to.With aftertable with 20
The feed motion forward of the travel speed of~100mm/min, completes the processing of a time.It is completed using multi-pass overlapped method whole
The processing of a processed plate.Workpiece to be machined remains cooled medium submerged state in whole process.
6, low-temperature annealing processing is carried out to the chromiumcopper workpiece completed the process, annealing temperature is 400~550 DEG C, heat preservation
Time is 20~40min.
The elemental composition (mass percent) of chromiumcopper is processed in the present invention are as follows: chromium (0.3~1.0), zirconium (0.05~
0.3), surplus is copper.
The principle of foundation of the present invention is: causing metal that serious modeling occurs by high speed rotation of the tool heads in chromiumcopper
Property deformation, machining area metal by dislocation multiplication, the processes such as move, bury in oblivion and be refined to nanocrystalline or Ultra-fine Grained size, cause
Chromiumcopper workpiece intensity with higher.Drastic deformation and sub-cooled in process are to guarantee necessity of structure refinement
Condition.Subsequent low-temperature annealing handles so that the second phase of intercrystalline precipitation nanoscale in supersaturated chromiumcopper, has purified copper
Matrix reduces in matrix impurity element to the scattering of free electron to guarantee alloy conductivity with higher.Intergranular precipitation
Nanoscale the second phase pinning crystal boundary inhibit crystal grain growing up during heating, ensure that high thermal structure stability.
Processing unit (plant) of the invention is constituted:
The present invention forms one with bottom plate by the end to end plate body in side four and opens as shown in Figure 1, the device used has
The upward rectangle cooling bath 5 of mouth, is placed on the friction stir welding machine workbench 6 that can be moved horizontally, workpiece to be machined 3
(chromiumcopper plate) is bolted in cooling bath 5.Machining tool head is made of mixing needle 1 and dead axle shoulder 2, and material is height
Hardness alloy steel.The diameter of dead axle shoulder 2 is generally 10~20mm, and the diameter of the insertion workpiece portion of truncated cone-shaped mixing needle 1 is 4~
8mm is highly 2~8mm.The axis of tool heads 1 top of tool heads 1 and can carry out axis perpendicular to the upper surface of workbench 6
It is connected to the rotating mechanism of feeding, such as the live spindle of planer type milling machine, gantry type milling machine.Tool heads 1 and workpiece 3 soak always in process
Liquid is steeped in cooling medium 4.
The device used may be the Friction Stir Welding device with dead axle shoulder, and plumb joint is changed to mixing needle.
Embodiment 1:
It is processed by one piece of long 120mm, width 40mm, with a thickness of chromiumcopper (Cu-0.55Cr-0.2Zr) plate of 3mm
Preceding solution treatment, solid solubility temperature are 980 DEG C, keep the temperature Water Quenching after 90min.Then the plate of solution treatment is fixed on low
In warm cooling bath, cooling treatment is carried out to plate and tool heads using liquid nitrogen cooling medium, the processing time is 20min.Then adopt
It is 12mm with dead axle shoulder diameter, the diameter for being inserted into workpiece portion is 4mm, is highly with revolving speed for the mixing needle of 2.9mm
1200rpm, travel speed are that 20mm/min is processed.400,450,500 are carried out respectively to the chromiumcopper sample after processing
DEG C heat preservation 30min annealing.
To processing state chromiumcopper carry out structure observation, as a result as shown in Fig. 2, processing district be refine it is nanocrystalline with it is super
Fine grained texture, grain size range are 50 to 210nm, average grain size 110nm, do not have Second Phase Precipitation in tissue.Add
For tissue of the work area after 450 DEG C are annealed 30min as shown in figure 3, average grain size is 130nm, grain boundaries have nanoscale chromium
Simple substance Second Phase Precipitation.Micro-hardness testing is carried out to above-mentioned annealing sheet coupon machining area and tensile property is tested, as a result
As shown in figure 4, the hardness of processing district is respectively 204HV, 120HV is improved than base material average hardness, post-processing area hardness of annealing
250HV is reached.As shown in Fig. 4-b, annealing post-processing area maximum intensity reaches the drafting results and conductivity of processing district
840MPa, conductivity have reached 89%IACS.
Embodiment 2:
By one piece of long 120mm, wide 40mm, with a thickness of 5mm chromiumcopper (Cu-0.8Cr-0.1Zr) process before consolidate
Molten processing, solid solubility temperature are 1000 DEG C, keep the temperature Water Quenching after 90min.Then the plate of solution treatment low temperature is fixed on to stir
In the cooling bath for mixing friction processing, cooling treatment is carried out to plate and tool heads using liquid nitrogen and crude alcohol mixture cooling medium,
The processing time is 20min.It is 15mm followed by dead axle shoulder diameter, it is highly 4.9mm that the diameter for being inserted into workpiece portion, which is 4mm,
Mixing needle with revolving speed be 800rpm, travel speed is that 20mm/min is processed.To the chromiumcopper sample after processing point
Not carry out 400,450,500 DEG C heat preservation 30min annealing.
Basic principles and main features of the invention have been shown and described above.It is noted that the present invention is based on big modeling
Property deformation realize that crystal grain refinement and Second Phase Precipitation principle obtain the high-intensitive processing method with Kumium alloy, this hair
Bright to be not restricted to the described embodiments, the machined parameters that can be used different from embodiment are guaranteeing that it is high-intensitive that chromiumcopper has
While have good electric conductivity.
Claims (5)
1. a kind of preparation method of high-strength Kumium alloy, including solution treatment, cold working and ageing treatment, special
Sign is, cold work process are as follows:
It will be fixed on cooling bath with a thickness of the chromiumcopper plate of 2~8mm by solution treatment, cooling is poured into cooling bath
Medium, and remain that chromiumcopper plate cooled medium submerged state completes subsequent cooling processing；In chromiumcopper plate
Temperature be cooled to -196 DEG C~-20 DEG C after, using the tool heads with dead axle shoulder and movable mixing needle, mixing needle by 400~
The revolving speed rotation of 1500rpm pierces inside workpiece, until dead axle shoulder and chromiumcopper plate surface completely attach to；With aftertable
With the feed motion forward of the travel speed of 20~100mm/min, the processing of a time is completed；Using multi-pass, overlapped that method is complete
At entire cooling process；
Wherein, the diameter of dead axle shoulder is 10~20mm, and the diameter that mixing needle is inserted into workpiece portion is 4~8mm, highly for 2~
8mm。
2. a kind of preparation method of high-strength Kumium alloy according to claim 1, which is characterized in that the copper chromium
Sheet alloy chemical component is by mass percentage are as follows: chromium 0.3-1.0%, zirconium 0.05-0.3%, surplus are copper.
3. a kind of preparation method of high-strength Kumium alloy according to claim 1, which is characterized in that the solid solution
Processing carries out water quenching after keeping the temperature 60~150min, obtains oversaturated solid solution for copper alloy plate is heated to 950~1000 DEG C
Processing.
4. a kind of preparation method of high-strength Kumium alloy according to claim 1, which is characterized in that the timeliness
Processing is carries out low-temperature annealing processing, and annealing temperature is 400~550 DEG C, and soaking time is 20~40min.
5. a kind of preparation method of high-strength Kumium alloy according to claim 1, which is characterized in that the cooling
Medium is liquid nitrogen, liquid nitrogen and crude alcohol mixture or dry ice and crude alcohol mixture.
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| CN201910027519.1A CN109457138A (en) | 2019-01-11 | 2019-01-11 | A kind of preparation method of high-strength Kumium alloy |
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| CN201910027519.1A CN109457138A (en) | 2019-01-11 | 2019-01-11 | A kind of preparation method of high-strength Kumium alloy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114107851A (en) * | 2021-12-16 | 2022-03-01 | 江苏海洋大学 | Distribution optimization method for processing white copper alloy grain boundary characteristics based on stirring friction |
| CN114965615A (en) * | 2022-05-24 | 2022-08-30 | 天津大学 | Mechanical stirring preparation of copper electrode with high-density dislocation and application of copper electrode in electrochemical hydrogen evolution reaction |
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| CN101323900A (en) * | 2007-06-15 | 2008-12-17 | 中国科学院金属研究所 | High speed processing method for realizing superfine crystal grain structure on metallic material surface |
| CN102816912A (en) * | 2012-08-14 | 2012-12-12 | 燕山大学 | Method for preparing gradient nano-structure on surface of metal material |
| CN103131886A (en) * | 2013-03-18 | 2013-06-05 | 湖南银联湘北铜业有限公司 | Chromium/zirconium/iron/copper alloy electrode material, and preparation and application method thereof |
| CN106756212A (en) * | 2017-01-09 | 2017-05-31 | 上海理工大学 | The method that continuous casting even squeezes production precipitation strength type high-strength copper evanohm |
| CN107523771A (en) * | 2017-09-11 | 2017-12-29 | 临沂市科创材料有限公司 | A kind of method of In-sltu reinforcement Cu-Cr-Zr alloy high temperature softening resistance |
-
2019
- 2019-01-11 CN CN201910027519.1A patent/CN109457138A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323900A (en) * | 2007-06-15 | 2008-12-17 | 中国科学院金属研究所 | High speed processing method for realizing superfine crystal grain structure on metallic material surface |
| CN102816912A (en) * | 2012-08-14 | 2012-12-12 | 燕山大学 | Method for preparing gradient nano-structure on surface of metal material |
| CN103131886A (en) * | 2013-03-18 | 2013-06-05 | 湖南银联湘北铜业有限公司 | Chromium/zirconium/iron/copper alloy electrode material, and preparation and application method thereof |
| CN106756212A (en) * | 2017-01-09 | 2017-05-31 | 上海理工大学 | The method that continuous casting even squeezes production precipitation strength type high-strength copper evanohm |
| CN107523771A (en) * | 2017-09-11 | 2017-12-29 | 临沂市科创材料有限公司 | A kind of method of In-sltu reinforcement Cu-Cr-Zr alloy high temperature softening resistance |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114107851A (en) * | 2021-12-16 | 2022-03-01 | 江苏海洋大学 | Distribution optimization method for processing white copper alloy grain boundary characteristics based on stirring friction |
| CN114965615A (en) * | 2022-05-24 | 2022-08-30 | 天津大学 | Mechanical stirring preparation of copper electrode with high-density dislocation and application of copper electrode in electrochemical hydrogen evolution reaction |
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