CN106032557B - A kind of method for improving copper-based multicomponent alloy hardness - Google Patents
A kind of method for improving copper-based multicomponent alloy hardness Download PDFInfo
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Abstract
A kind of method for improving copper-based multicomponent alloy hardness, the copper-based multicomponent alloy of permanent mold casting is mainly placed on the enterprising horizontal high voltage Ageing Treatment of cubic hinge press, pressure is 2~5Gpa, and heating-up temperature is 480~550 DEG C, after being incubated 60~120min, power-off release is cooled to room temperature.Present invention process is simple, is easily manipulated, stable performance, and the copper-based multicomponent alloy handled by this method can obtain higher hardness number, and organize more even compact, and compared with the copper-based multicomponent alloy of before processing, its hardness number improves about 28.05%；Compared with by normative heat treatment, its hardness number improves about 10.54%.
Description
Technical field
The invention belongs to metal material field, more particularly to a kind of method for improving copper-based multicomponent alloy hardness.
Background technology
Copper alloy is widely used in leads of IC frame, electric resistance welding with its high intensity, good electric conductivity and thermal conductivity
Electrode, armature, the phase changer etc. of electric tool.With the development of science and technology, to high-strength highly-conductive copper-based multicomponent alloy
Demand it is increasing, while mechanical property to such copper alloy is it is also proposed that higher requirement.Therefore, find and prepare and carry
The method of such high copper alloy mechanical property causes extensive attention.
At present, the method for improving such hardness of copper alloy be mainly optimized alloy composition, deformation and heat treatment (solid solution, when
Effect processing).Though addition trace element can improve the hardness number of copper alloy, the electric conductivity of copper alloy is degrading simultaneously；Using
Deformation and heat treatment (solid solution, Ageing Treatment) method, technique is cumbersome, and cost is high, still limited to the hardness of raising copper alloy.
The content of the invention
It is easily manipulated the invention aims to providing one kind, stable performance, copper-based multicomponent alloy hardness can be effectively improved
Method, the present invention mainly using permanent mold casting copper-based multicomponent alloy in conjunction with high pressure Ageing Treatment.
The object of the present invention is achieved like this, and this method comprises the following steps：
1., the preparation of permanent mold casting copper-based multicomponent alloy material：
With oxygen-free copper (purity 99.99%), chromium powder (purity 99.9%), iron powder (purity 99.95%), aluminium powder (purity
97%), selenium powder (purity 99.99%) and tellurium powder (purity 99.99%) are raw material, by Cu, Cr, Fe, Al, Se and Te powder according to one
Certainty ratio (mass fraction, %) dispensing, is put into the crucible in vacuum drying oven, is melted at 1180~1250 DEG C of temperature, when
Raw material is incubated 10~15 minutes after being completely melt, afterwards, pours into metal mold and is cooled to room temperature, obtain copper-based multicomponent alloy, its
Chemical composition (mass fraction %) is：Cr 0.50%~0.80%, Se 0.50%~1.00%, Al 0.10%~0.30%,
Te 0.40%~0.80%, Fe0.10%~0.30%, its surplus are Cu；
2., high pressure Ageing Treatment：
By 1. permanent mold casting copper-based multicomponent alloy material that step is prepared at the enterprising horizontal high voltage timeliness of cubic hinge press
Reason, pressure are 2~5GPa, and heating-up temperature is 480~550 DEG C, and soaking time is 60~120min, and power-off release is cooled to room
Temperature.
The present invention has the following advantages that compared with prior art and good effect：
1st, the present invention uses permanent mold casting copper-based multicomponent alloy, and purpose accelerates copper alloy setting rate, causes Cr to exist
Solid solution increasing number in Cu, the precipitation for Cr phases in subsequent high pressure ageing process provide guarantee.During subsequent high pressure
Effect processing, on the one hand, can eliminate caused microscopic pores in casting process, it is loose the defects of, improve copper-based multicomponent alloy
Compactness.On the other hand, hyperpressure energy alloy produces distortion, causes number of dislocations inside alloy to increase, this is ag(e)ing process
The precipitation of middle Cr phases provides more positions, furthermore, hyperpressure also can reduce the critical free energy needed for precipitated phase, cause
Separate out Cr phases increasing number, while under too high pressure atom diffusion it is more difficult, to separate out growing up for Cr phases serve suppression
Make and use.Therefore the Cr phases separated out after high pressure Ageing Treatment in copper-based multicomponent alloy matrix are more tiny, also more disperse is distributed, from
And dispersion-strengthened action is enhanced, along with the increase of copper-based multicomponent alloy compactness, its result improves copper-based multicomponent alloy
Hardness number.
2nd, present invention process is simple, is easily manipulated, stable performance.
2nd, the copper-based multicomponent alloy handled by the inventive method can obtain higher hardness number, and organize more uniformly to cause
It is close.Compared with as cast condition copper-based multicomponent alloy, its hardness number improves about 28.05%；Compared with by normative heat treatment, its is hard
Angle value improves about 10.54%.
Embodiment
The present invention is described in detail below by embodiment.
Embodiment 1
Material therefor is the copper-based multicomponent alloy of permanent mold casting, and its chemical composition (mass fraction wt%) is：Cr
0.58%th, Se 0.720%, Al 0.23%, Te 0.64%, Fe 0.21%, its surplus are Cu.The copper alloy sample is placed on
The enterprising horizontal high voltage Ageing Treatment of CS- Ι Type B cubic hinge press, pressure 2GPa, heating-up temperature are 480 DEG C, and soaking time is
120min, power-off release are cooled to room temperature.The test result of its hardness number is shown in Table 1.
Embodiment 2
The composition of material therefor and technical process are same as Example 1, and pressure is used in the present embodiment as 5GPa, heating temperature
Spend for 550 DEG C, soaking time 60min, power-off release is cooled to room temperature.The test result of its hardness number is shown in Table 1.
Embodiment 3
The composition of material therefor and technical process are same as Example 1, and pressure is used in the present embodiment as 3GPa, heating temperature
Spend for 500 DEG C, soaking time 100min, power-off release is cooled to room temperature.The test result of its hardness number is shown in Table 1.
The hardness test result of copper-based multicomponent alloy under the different conditions of table 1
Note：Normative heat treatment (solid solution+timeliness)：60min+470 DEG C of timeliness 120min of 950 DEG C of solid solutions.
It is above-mentioned test result indicates that：Copper-based multicomponent alloy has higher hardness number after the inventive method is handled, and is higher than
Hardness number before embodiment and after normative heat treatment technique (solid solution+timeliness) processing.
Claims (2)
1. a kind of method for improving copper-based multicomponent alloy hardness, it is characterized in that：This method comprises the following steps：
1., the preparation of permanent mold casting copper-based multicomponent alloy material：
Using oxygen-free copper, chromium powder, iron powder, aluminium powder, selenium powder and tellurium powder as raw material, by Cu, Cr, Fe, Al, Se and Te powder according to certain ratio
Example dispensing, is put into the crucible in vacuum drying oven, is melted at 1180~1250 DEG C of temperature, is incubated after raw material is completely melt
10~15 minutes, afterwards, pour into metal mold and be cooled to room temperature, obtain copper-based multicomponent alloy, its chemical composition is：Cr 0.50%
~0.80%, Se 0.50%~1.00%, Al 0.10%~0.30%, Te 0.40%~0.80%, Fe 0.10%~0.30%, remaining
Measure as Cu；
2., high pressure Ageing Treatment：
By 1. permanent mold casting copper-based multicomponent alloy material that step is prepared in the enterprising horizontal high voltage Ageing Treatment of cubic hinge press, pressure
Power is 2~5GPa, and heating-up temperature is 480~550 DEG C, and soaking time is 60~120min, and power-off release is cooled to room temperature.
2. a kind of method for improving copper-based multicomponent alloy hardness according to claim 1, it is characterized in that：The oxygen-free copper,
Chromium powder, iron powder, the purity of selenium powder and tellurium powder raw material are more than 99.9%, and the purity of aluminium powder raw material is 97%.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061442A (en) * | 1990-11-13 | 1992-05-27 | 沈阳有色金属加工厂 | High-strength highly-conductive elastic copper alloy and manufacture method |
| CN102719696A (en) * | 2012-06-27 | 2012-10-10 | 宁波金田铜业(集团)股份有限公司 | Elastic brass alloy and preparation method thereof |
| CN104004939A (en) * | 2014-06-13 | 2014-08-27 | 甘肃大鑫铜业有限责任公司 | High-strength and high-conductivity copper alloy and preparation method thereof |
-
2015
- 2015-03-18 CN CN201510119667.8A patent/CN106032557B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061442A (en) * | 1990-11-13 | 1992-05-27 | 沈阳有色金属加工厂 | High-strength highly-conductive elastic copper alloy and manufacture method |
| CN102719696A (en) * | 2012-06-27 | 2012-10-10 | 宁波金田铜业(集团)股份有限公司 | Elastic brass alloy and preparation method thereof |
| CN104004939A (en) * | 2014-06-13 | 2014-08-27 | 甘肃大鑫铜业有限责任公司 | High-strength and high-conductivity copper alloy and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 3GPa压力处理对高强高导铜合金导电率的影响;廉志凯;《热加工工艺》;20141009;第43卷(第18期);第73-75页 * |
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