CN106498322A - A kind of magnetostatic field cryogenic treating process for improving copper or copper alloy obdurability - Google Patents
A kind of magnetostatic field cryogenic treating process for improving copper or copper alloy obdurability Download PDFInfo
- Publication number
- CN106498322A CN106498322A CN201610837760.7A CN201610837760A CN106498322A CN 106498322 A CN106498322 A CN 106498322A CN 201610837760 A CN201610837760 A CN 201610837760A CN 106498322 A CN106498322 A CN 106498322A
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- China
- Prior art keywords
- copper
- copper alloy
- deep cooling
- temperature
- obdurability
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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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- 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
- C22F3/00—Changing the physical structure of non-ferrous metals or alloys by special physical methods, e.g. treatment with neutrons
Abstract
The present invention relates to a kind of strengthening and toughening treatment method of material, belong to material heat treatment field, a kind of method for improving copper or copper alloy and its product obdurability is provided, the technique being coupled using deep cooling and magnetostatic field carries out physical field modification to copper and copper alloy, on the basis of keeping material original size and composition constant, institutional framework is seen by adjusting microalloy, is improved copper and the obdurability of copper alloy.
Description
Technical field
The present invention relates to a kind of strengthening and toughening treatment method of material, belongs to material heat treatment field, specially one kind is directed to
Copper and copper alloy and its product, improve the processing method of its obdurability by way of magnetostatic field and deep cooling field are coupled.
Background technology
The features such as subzero treatment has stabilizing material size, improves uniformity, Reducing distortion, pollution-free, low cost, in material
Significant progress being had been obtained in the modification of material, but the country being that cryogenic technology is used for ferrous materials at present mostly, this is right
Improve the performances such as the wearability of the materials such as high-speed steel, bearing steel, mould steel, hardness, dimensional stability and there is obvious action；Magnetic
The application that field is processed in metal material is concentrated mainly in smelting process at present, can make metal in process of setting using magnetic field
The characteristics of middle generation preferred orientation and crystal grain refinement, improves the performance of some alloys；Magnetic field and deep cooling are combined, right
The research that existing metal material is modified still is in the budding stage.
Copper and copper alloy have stable chemical performance, excellent corrosion resistance, good mechanical property and be widely used with
The fields such as national defence, building, traffic；But there is some harmful precipitated phases and defect smelting with the operation of rolling so that copper
And with alloy obdurability be subject to strong influence；Structure refinement, to reduce defect be to improve most having for copper and copper alloy obdurability
One of approach of effect；Find by literature search, the existing copper and the Chinese patent of copper alloy obdurability of improving has：The manufacture of copper alloy
Method and copper alloy CN201480031814.X, copper alloy and preparation method thereof CN201210563839.7 and copper alloy and its system
Preparation Method CN201080037901.8 etc.；The method adopted by they is mainly using interpolation alloying element, deformation process, heat treatment
Deng, these methods, all to there is higher production cost, materials chemistry component and uneven microstructure, segregation tendency big etc. inevitably
Shortcoming；
In sum, need a kind of new material processing method badly to improve existing copper and copper alloy obdurability, with palliative
Contradiction between energy demand and production cost.
Content of the invention
The purpose of the present invention is to process the problem for existing for current copper and copper alloy products Strengthening and Toughening, proposes one kind and is directed to
The method that copper and copper alloy products after Precision Machining carries out Strengthening and Toughening process；Do not affect alloying component, product size and structure,
On the premise of not needing secondary finishing operation to process, the obdurability of copper and copper alloy is improved.
Purpose of the present invention technical scheme is：
The present invention proposes a kind of magnetostatic field cryogenic treating process for improving copper and copper alloy obdurability, it is characterised in that：Right
Copper and copper alloy carry out the subzero treatment under the conditions of magnetostatic field, treat that subzero treatment takes out copper alloy products after terminating, in room
Rise again under the conditions of temperature, carry out natrual ageing.
In order to solve above technical problem, the magnetostatic field subzero treatment of a kind of raising copper and copper alloy obdurability of the present invention
Method, including：
1) to shaping after fine copper or copper alloy products surface carry out finishing, remove contamination, sanding and polishing process, with improve
The efficiency of magnetostatic field subzero treatment.
2) pending product is placed between kicker magnet on specimen holder, the Surface field intensity of kicker magnet is
0.1～2T；Then the specimen holder for assembling and kicker magnet are put in deep cooling box carries out subzero treatment；When copper or copper alloy products
Thickness be less than or equal to 10mm, that is, when belonging to frivolous part, can select the kicker magnet of magnetic field intensity 0.1～1T；When copper or copper alloy
The thickness of product is more than 10mm, when belonging to thick and heavy part, must be more than 1T from magnetic field intensity and the kicker magnet less than or equal to 2T, because
If for the kicker magnet magnetic field intensity that thick and heavy part is selected is less than normal, can make there is obvious magnetic field gradient in copper or copper alloy products,
This can affect the action effect in magnetic field, so as to affect the performance maximum lift of copper or copper alloy products.
3) by computer regulating rate of temperature fall during subzero treatment, rate of temperature fall is 0.1～30 DEG C/min；When copper or copper are closed
The thickness of golden product is less than or equal to 10mm, and when belonging to frivolous part, rate of temperature fall takes 15～30 DEG C/min；When copper or copper alloy products
Thickness be more than 10mm, when belonging to thick and heavy part, rate of temperature fall takes more than or equal to 0.1 DEG C/min and is less than 15.0 DEG C/min；Cooling
Speed can make copper or copper alloy products higher thermograde occur when excessive, the raising of copper or copper alloy products performance is had
Detrimental effect.
4), after temperature is reduced to liquid nitrogen temperature, deep cooling insulation is carried out；Deep cooling temperature retention time is 1～60h；When copper or copper are closed
The thickness of golden product is less than or equal to 10mm, and when belonging to frivolous part, deep cooling temperature retention time takes 1～30h；When copper or copper alloy products
Thickness is more than 10mm, and when belonging to thick and heavy part, deep cooling temperature retention time more than 30h and is less than or equal to 60h；Because for frivolous part
Speech, after deep cooling temperature retention time exceedes certain time, its performance raising is not obvious；And for thick and heavy part, if deep cooling is incubated
Between too short, it may appear that degree of grain refinement is low, the phenomenon that harmful precipitated phase conversion ratio is low, so as to have impact on copper or copper alloy products
The maximization of performance.
5), after the completion of subzero treatment, the built-up section of kicker magnet and copper alloy products is taken out from deep cooling box, and in room
Rise again under the conditions of temperature, carry out natrual ageing, return to room temperature.
Compared with prior art, the present invention has advantages below and effect：
(1) method of the present invention carries out Strengthening and Toughening process suitable for the copper and copper alloy products after Precision Machining, does not affect
Metal ingredient, do not affect product size, break can product top layer and structure, do not need secondary finishing operation processing, than existingization
Learn plating, deposition and machining deformation strengthening and there is prominent advantage.
(2) metallic article i.e. not handled by pollution damage of the liquid nitrogen and magnetostatic field employed in processing procedure, but not dirty
Dye environment, does not affect operator's health, and whole processing procedure energy consumption is low；Therefore, the invention belongs to a kind of environmental protection new
Section bar material processing and treating method.
(3) processing method of the present invention can play crystal grain thinning, reduce harmful precipitated phase, the work of uniform formation
With such that it is able to improve the obdurability of existing cheap but low performance copper alloy and its product, further excavating existing copper alloy
Performance potential, reduce production cost, with higher market economy benefit.
Description of the drawings
Fig. 1 is enforcement assembly of the invention structural representation.
1；Deep cooling box；2；Kicker magnet；3；Kicker magnet；4；Specimen holder；5；Computer；6；Liquid nitrogen container.
Specific embodiment
The invention will be further elaborated with reference to embodiments；Embodiment is merely to illustrate the present invention, rather than with
Any mode is limiting the present invention.
Kicker magnet selects N52 type neodymium iron boron strong magnets, and specimen holder thickness is 2mm；Cryogenic treatment process adopts Chinese science
The SLX programme-control deep cooling processing system of institute's physiochemical techniques Research Institute is carried out, cryogenic system by deep cooling box, control cabinet,
Liquid nitrogen container, liquid nitrogen pump and vacuum woven hose, computer and control software composition；During work, workpiece is inserted in deep cooling box, in meter
On calculation machine or control cabinet after basketry program, automated system operation, after program end of run, system is automatically stopped；Whole service
Without the need for manual intervention, easy to operate, using reliability；The system temperature control range：- 196 DEG C～room temperature；Rate of temperature fall：0.1～
30℃/min；DNS10 type electronic universal tester of the stretcher for the production of Changchun machinery plant, rate of extension set 1mm/min.
The magnetostatic field subzero treatment of 1 aluminium bronze of example
The composition such as table 1 of the aluminium bronze that this enforcement is adopted, sample are processed into 45mm × 5mm by the way of wire cutting
The frivolous plate stretch sample of × 2mm, embodiment parameter and result as shown in table 2.
1 aluminium bronze alloy composition of table
| Element | Al | Zn | Mn | Fe | Pb | Si | Cu |
| Content (%) | 8.0-10.0 | 0-1.0 | 0-0.5 | 2.0-4.0 | 0-0.01 | 0-0.1 | Surplus |
2 aluminium bronze magnetostatic field subzero treatment test result of table
From Table 2, it can be seen that by subzero treatment under magnetostatic field, the obdurability of aluminium bronze can be made significantly to be carried
High；Tensile strength improves 2.6%～7.1%, and elongation percentage improves 11.6%～44.2%.
The magnetostatic field subzero treatment of 2 aldubra of example
This enforcement adopt aluminium bronze composition such as table 3, sample be processed into by the way of wire cutting 45mm ×
The thick and heavy sheet coupon of 20mm × 20mm, embodiment parameter and result as shown in table 4.
3 alumin(i)um yellow brass composition of table
| Element | Cu | Sn | Mn | Al | Fe | Pb | Zn |
| Content (%) | 64.0-68.0 | 0-0.2 | 1.5-2.5 | 6.0-7.0 | 2.0-4.0 | 0-0.5 | Surplus |
4 aldubra magnetostatic field subzero treatment test result of table
As can be seen from Table 4, by subzero treatment under magnetostatic field, the obdurability of aldubra can be made significantly to be carried
High；Tensile strength improves 4.6%～8.1%, and elongation percentage improves 10.6%～46.8%.
Claims (5)
1. a kind of magnetostatic field cryogenic treating process for improving copper or copper alloy obdurability, it is characterised in that：Copper or copper alloy are entered
Subzero treatment of the row under the conditions of magnetostatic field, treats that subzero treatment takes out copper alloy products after terminating, rises again at ambient temperature,
Carry out natrual ageing.
2. a kind of magnetostatic field cryogenic treating process for improving copper or copper alloy obdurability as claimed in claim 1, its feature exist
In comprising the following steps that：
1) to shaping after fine copper or copper alloy products surface carry out finishing, remove contamination, sanding and polishing process, magnetostatic to improve
The efficiency of field depth cold treatment；
2) pending product being placed between kicker magnet on the specimen holder, the Surface field intensity of kicker magnet is 0.1～
2T；Then the specimen holder for assembling and kicker magnet are put in deep cooling box carries out subzero treatment；
3) by computer regulating rate of temperature fall during subzero treatment, rate of temperature fall is 0.1～30 DEG C/min；
4), after temperature is reduced to liquid nitrogen temperature, deep cooling insulation is carried out；Deep cooling temperature retention time is 1～60h；
5), after the completion of subzero treatment, the built-up section of kicker magnet and product is taken out from deep cooling box, and is returned at ambient temperature
Temperature, carries out natrual ageing, returns to room temperature.
3. a kind of magnetostatic field cryogenic treating process for improving copper or copper alloy obdurability as claimed in claim 2, its feature exist
In step 2) in, when the thickness of copper or copper alloy products is less than or equal to 10mm, that is, when belonging to frivolous part, from magnetic field intensity 0.1
The kicker magnet of～1T；When the thickness of copper or copper alloy products is more than 10mm, when belonging to thick and heavy part, 1T must be more than from magnetic field intensity
And the kicker magnet less than or equal to 2T, if because for the kicker magnet magnetic field intensity of thick and heavy part selection is less than normal, presence in product can be made
Obvious magnetic field gradient, this can affect the action effect in magnetic field, so as to affect the performance maximum lift of product.
4. a kind of magnetostatic field cryogenic treating process for improving copper or copper alloy obdurability as claimed in claim 2, its feature exist
In step 3) in, when the thickness of copper or copper alloy products is less than or equal to 10mm, when belonging to frivolous part, rate of temperature fall takes 15～30
℃/min；When copper or copper alloy products thickness be more than 10mm, when belonging to thick and heavy part, rate of temperature fall take more than or equal to 0.1 DEG C/
Min is simultaneously less than 15.0 DEG C/min；Rate of temperature fall can make product higher thermograde, the raising to product properties occur when excessive
Have adverse effect.
5. a kind of magnetostatic field cryogenic treating process for improving copper or copper alloy obdurability as claimed in claim 2, its feature exist
In step 4) in, when the thickness of copper or copper alloy products is less than or equal to 10mm, when belonging to frivolous part, deep cooling temperature retention time takes 1～
30h；When the thickness of copper or copper alloy products is more than 10mm, when belonging to thick and heavy part, deep cooling temperature retention time more than 30h and is less than or equal to
60h；Because for frivolous part, after deep cooling temperature retention time exceedes certain time, its performance raising is not obvious；And for thickness
For heavy mail, if deep cooling temperature retention time is too short, it may appear that the low phenomenon of low, the harmful precipitated phase conversion ratio of degree of grain refinement, from
And have impact on the maximization of product properties.
Priority Applications (1)
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| CN201610837760.7A CN106498322B (en) | 2016-09-21 | 2016-09-21 | A kind of magnetostatic field cryogenic treating process improving copper or copper alloy obdurability |
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| CN201610837760.7A CN106498322B (en) | 2016-09-21 | 2016-09-21 | A kind of magnetostatic field cryogenic treating process improving copper or copper alloy obdurability |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111235458A (en) * | 2020-02-28 | 2020-06-05 | 江苏大学 | Boron-containing rare earth-containing high-entropy alloy and magnetic field treatment method thereof |
| CN111607810A (en) * | 2020-07-14 | 2020-09-01 | 安徽铜冠铜箔集团股份有限公司 | Efficient production method of ultrathin electrolytic copper foil |
| CN112952309A (en) * | 2021-02-26 | 2021-06-11 | 力信（江苏）能源科技有限责任公司 | Strengthening and toughening treatment method for aluminum nail for welding and sealing lithium battery |
| CN115354126A (en) * | 2022-08-15 | 2022-11-18 | 武汉理工大学 | Method and device for improving toughness of metal material by using cryogenic electromagnetic composite field |
| CN115418588A (en) * | 2022-09-15 | 2022-12-02 | 西北工业大学 | Magnetic field deep supercooling treatment method for improving toughness of cobalt-based high-temperature alloy |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111235458A (en) * | 2020-02-28 | 2020-06-05 | 江苏大学 | Boron-containing rare earth-containing high-entropy alloy and magnetic field treatment method thereof |
| CN111235458B (en) * | 2020-02-28 | 2021-06-22 | 江苏大学 | Boron-containing rare earth-containing high-entropy alloy and magnetic field treatment method thereof |
| WO2021169985A1 (en) * | 2020-02-28 | 2021-09-02 | 江苏大学 | High-entropy alloy containing boron and rare earth and magnetic field treatment method therefor |
| GB2606330A (en) * | 2020-02-28 | 2022-11-02 | Univ Jiangsu | High-entropy alloy containing boron and rare earth and magnetic field treatment method therefor |
| GB2606330B (en) * | 2020-02-28 | 2023-04-19 | Univ Jiangsu | Boron-containing and rare earth-containing high-entropy alloy and magnetic field treatment method therefor |
| CN111607810A (en) * | 2020-07-14 | 2020-09-01 | 安徽铜冠铜箔集团股份有限公司 | Efficient production method of ultrathin electrolytic copper foil |
| CN112952309A (en) * | 2021-02-26 | 2021-06-11 | 力信（江苏）能源科技有限责任公司 | Strengthening and toughening treatment method for aluminum nail for welding and sealing lithium battery |
| CN115354126A (en) * | 2022-08-15 | 2022-11-18 | 武汉理工大学 | Method and device for improving toughness of metal material by using cryogenic electromagnetic composite field |
| CN115418588A (en) * | 2022-09-15 | 2022-12-02 | 西北工业大学 | Magnetic field deep supercooling treatment method for improving toughness of cobalt-based high-temperature alloy |
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Effective date of registration: 20201123 Address after: 215500 Building 1 and 2, west side of Zhaoshi village Sicun Road, Meili Town, Changshu City, Suzhou City, Jiangsu Province Patentee after: Changshu Tonghua Metal Materials Sales Co.,Ltd. Address before: 215500 No.13, Caotang Road, Changshu, Suzhou, Jiangsu Province Patentee before: Changshu intellectual property operation center Co.,Ltd. |
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