CN103572184B - Preparation method of high-strength silver-copper alloy material - Google Patents
Preparation method of high-strength silver-copper alloy material Download PDFInfo
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- CN103572184B CN103572184B CN201310487643.9A CN201310487643A CN103572184B CN 103572184 B CN103572184 B CN 103572184B CN 201310487643 A CN201310487643 A CN 201310487643A CN 103572184 B CN103572184 B CN 103572184B
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Abstract
The invention discloses a preparation method of a high-strength silver-copper alloy material. The method comprises the following steps: 1) taking copper and silver as raw materials, and burdening according to the ratio of 15-20wt% of silver and the balance of copper; 2) preparing a silver-copper alloy bar by adopting a vacuum smelting technology; 3) refining the silver-copper alloy bar by adopting a vacuum consumable arc smelting technology; 4) hot extrusion, wherein the extrusion temperature is 800-900 DEG C; the heat preservation time is 2-4 hours; the extrusion ratio is 8-10, and extruding into the bar; 5) thermal treatment, wherein the annealing temperature is 200-250 DEG C; the heat preservation time is 1-2 hours, cooling along with a furnace; 6) drawing to obtain the high-strength silver-copper alloy material. A silver-copper alloy ingot is refined from the copper and the silver as raw materials in a vacuum consumable smelting furnace; the high-strength silver-copper alloy is obtained by the technologies such as hot extrusion, thermal annealing, drawing and the like. By adopting the silver-copper alloy material prepared by the preparation method disclosed by the invention, the tensile strength can be up to over 1.2 GPa, and the conductivity can be up to over 75% of international annealed copper standard (IACS).
Description
Technical field
The present invention relates to a kind of preparation method of high-strength silver-copper alloy material, belong to technical field of alloy material.
Background technology
Kufil has good heat-conductivity conducting, and the physical and mechanical property of excellence, is widely used and high-strength magnets system, large high-speed turbine generator rotator wire etc.For a long time, find in the research of Kufil, there is shifting relation in Kufil intensity and electroconductibility, when keeping Kufil high conductivity, tensile strength is difficult to bring up to more than 1.1GPa, therefore handle the relation of tensile strength and specific conductivity well, and the material developing a kind of combine high strength and high conductivity is the emphasis direction of many researchers research and development.
CN101643866A discloses a kind of high-strength and high-conductivity CuAg alloy material and preparation method thereof, and to specifically disclose this alloy material composition be Ag5wt%-10wt%, and copper surplus, and the preparation method of this alloy material, comprising: 1) chemical composition design; 2) working chamber and directional freeze room vacuumize; 3) plumbago crucible preheating; 4) alloy melting; 5) drop-down plumbago crucible; 6) alloy pig is taken out; 7) hot extrusion; 8) thermal treatment; 9) wire drawing.But the CuAg alloy material that employing the method obtains is when specific conductivity is only 70-71%, and its tensile strength also cannot reach more than 1.1GPa.
Summary of the invention
The object of this invention is to provide a kind of preparation method of high-strength silver-copper alloy material, with when keeping Kufil high conductivity, improving the tensile strength of Kufil.
In order to realize above object, the technical solution adopted in the present invention is to provide a kind of preparation method of high-strength silver-copper alloy material, comprises the following steps:
1) with copper, silver for raw material, according to massfraction silver 15-20%, surplus is that the ratio of copper is prepared burden;
2) vacuum melting technology is adopted to prepare Kufil bar;
3) vacuum consumable arc-melting technology refined matte silver alloys bar is adopted: the Kufil bar that vacuum melting is obtained is installed, then vacuum consumable electrode arc furnace is vacuumized having under water coolant, compressed-air actuated condition, when in stove, vacuum tightness reaches 1Pa, alloy melting, treat that temperature is down to less than 100 DEG C, take out Kufil bar;
4) hot extrusion: extrusion temperature is 800-900 DEG C, insulation 2-4h, extrusion ratio is 8-10, is squeezed into bar;
5) thermal treatment: annealing temperature is 200-250 DEG C, soaking time is 1-2h, furnace cooling;
6) drawing and get final product.
Described copper purity is greater than 99.9%.
Described silver-colored purity is greater than 99.9%.
Described step 2) in Kufil bar be Ф 50-Ф 80mm.
The concrete steps of described vacuum melting technology are:
By in copper good for proportioning, silver-colored disposable loading vacuum melting furnace, wherein Ag loads in hopper, then vacuumize, power transmission is started when vacuum tightness reaches 0.1-0.5Pa, increased wattage, adds silver when temperature arrives 1200 DEG C, and stirs, when temperature is poured into a mould to during 900-950 DEG C, cooling obtains Kufil bar.
The smelting temperature of described step 3) is 1100-1200 DEG C.
The smelting time of described step 3) is 20-30min.
Every time deflection of described drawing is 10-15%.
The present invention for raw material, by refined matte silver alloys bar in vacuum consumable smelting stove, by techniques such as hot extrusion, thermal annealing, drawings, obtains the Kufil of high strength with copper, silver.The present invention adopts vacuum consumable smelting technology, improves alloy structure; Adopt 800-900 DEG C of hot extrusion technique, can crystal grain thinning, eliminate casting shrinking hole, change tissue trend, improve the over-all properties of material; 200-250 DEG C of annealing, eliminates unrelieved stress minimizing distortion and is inclined to crackle, adjustment tissue, elimination tissue defects.Experiment proves, adopt the Kufil material that preparation method of the present invention obtains, tensile strength can reach more than 1.2GPa, and specific conductivity can reach more than 75%IACS.
Embodiment
Embodiment 1
The preparation method of the high-strength silver-copper alloy material of the present embodiment, comprises the following steps:
1) with purity be greater than 99.9% copper and purity be greater than the silver of 99.9% for raw material, by massfraction silver 15%, surplus is that the ratio of copper is prepared burden;
2) adopt vacuum melting technology to prepare the Kufil bar of Ф 80mm, concrete steps are:
By in copper good for proportioning, silver-colored disposable loading vacuum melting furnace, wherein Ag loads in hopper, then vacuumize, power transmission is started when vacuum tightness reaches 0.5Pa, increased wattage, adds silver when temperature arrives 1200 DEG C, and stirs, pour into a mould when temperature to 900 DEG C, cooling obtains Kufil bar;
3) vacuum consumable arc-melting technology refined matte silver alloys bar is adopted;
A) feed: check whether electric level bar surface and conducting surface clean, and are locked by Kufil bar after foreign;
B) vacuum consumable electrode arc furnace takes out rough vacuum: vacuumize having under water coolant, compressed-air actuated condition, in stove, vacuum level requirements is 1Pa;
C) alloy melting, smelting temperature is 1200 DEG C, and the time is 20min; Treat that temperature is down to 100 DEG C, take out Kufil bar;
4) hot extrusion: extrusion temperature is 800 DEG C, insulation 4h, extrusion ratio is 8, is squeezed into bar;
5) thermal treatment: annealing temperature is 220 DEG C, soaking time is 1h, furnace cooling;
6) drawing, every time deflection is 15%, obtains high-strength silver-copper alloy material.
Embodiment 2
The preparation method of the high-strength silver-copper alloy material of the present embodiment, comprises the following steps:
1) with purity be greater than 99.9% copper and purity be greater than the silver of 99.9% for raw material, by massfraction silver 20%, surplus is that the ratio of copper is prepared burden;
2) adopt vacuum melting technology to prepare the Kufil bar of Ф 50mm, concrete steps are:
By in copper good for proportioning, silver-colored disposable loading vacuum melting furnace, wherein Ag loads in hopper, then vacuumize, power transmission is started when vacuum tightness reaches 0.1Pa, increased wattage, adds silver when temperature arrives 1200 DEG C, and carries out stirring cooling, pour into a mould when temperature to 950 DEG C, cooling obtains Kufil bar;
3) vacuum consumable arc-melting technology refined matte silver alloys bar is adopted;
A) feed: check whether electric level bar surface and conducting surface clean, and are locked by Kufil bar after foreign;
B) vacuum consumable electrode arc furnace takes out rough vacuum: vacuumize having under water coolant, compressed-air actuated condition, in stove, vacuum level requirements is 1Pa;
C) alloy melting, smelting temperature is 1150 DEG C, and the time is 30min; Treat that temperature is down to 80 DEG C, take out Kufil bar;
4) hot extrusion: extrusion temperature is 900 DEG C, insulation 2h, extrusion ratio is 9, is squeezed into bar;
5) thermal treatment: annealing temperature is 250 DEG C, soaking time is 2h, furnace cooling;
6) drawing, every time deflection is 10%, obtains high-strength silver-copper alloy material.
Embodiment 3
The preparation method of the high-strength silver-copper alloy material of the present embodiment, comprises the following steps:
1) with purity be greater than 99.9% copper and purity be greater than the silver of 99.9% for raw material, by massfraction silver 18%, surplus is that the ratio of copper is prepared burden;
2) adopt vacuum melting technology to prepare the Kufil bar of Ф 60mm, concrete steps are:
By in copper good for proportioning, silver-colored disposable loading vacuum melting furnace, wherein Ag loads in hopper, then vacuumize, power transmission is started when vacuum tightness reaches 0.3Pa, increased wattage, adds silver when temperature arrives 1200 DEG C, and carries out stirring cooling, pour into a mould when temperature to 930 DEG C, cooling obtains Kufil bar;
3) vacuum consumable arc-melting technology refined matte silver alloys bar is adopted;
A) feed: check whether electric level bar surface and conducting surface clean, and are locked by Kufil bar after foreign;
B) vacuum consumable electrode arc furnace takes out rough vacuum: vacuumize having under water coolant, compressed-air actuated condition, in stove, vacuum level requirements is 1Pa;
C) alloy melting, smelting temperature is 1100 DEG C, and the time is 25min; Treat that temperature is down to 90 DEG C, take out Kufil bar;
4) hot extrusion: extrusion temperature is 850 DEG C, insulation 3h, extrusion ratio is 10, is squeezed into bar;
5) thermal treatment: annealing temperature is 200 DEG C, soaking time is 1.5h, furnace cooling;
6) drawing, every time deflection is 13%, obtains high-strength silver-copper alloy material.
Experimental example
Test the tensile strength of the Kufil material of embodiment 1-3 and specific conductivity, result is as shown in table 1.
The tensile strength of the Kufil material of table 1 embodiment 1-3 and specific conductivity test result
| Test event | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Tensile strength (GPa) | 1.21 | 1.22 | 1.24 |
| Specific conductivity (%IACS) | 78 | 77 | 78 |
Claims (6)
1. a preparation method for high-strength silver-copper alloy material, is characterized in that, comprises the following steps:
1) with copper, silver for raw material, according to massfraction silver 15-20%, surplus is that the ratio of copper is prepared burden;
2) vacuum melting technology is adopted to prepare Kufil bar;
3) vacuum consumable arc-melting technology refined matte silver alloys bar is adopted: the Kufil bar that vacuum melting is obtained is installed, then vacuum consumable electrode arc furnace is vacuumized having under water coolant, compressed-air actuated condition, when in stove, vacuum tightness reaches 1Pa, alloy melting, treat that temperature is down to less than 100 DEG C, take out Kufil bar;
4) hot extrusion: extrusion temperature is 800-900 DEG C, insulation 2-4h, extrusion ratio is 8-10, is squeezed into bar;
5) thermal treatment: annealing temperature is 200-250 DEG C, soaking time is 1-2h, furnace cooling;
6) drawing and get final product.
2. the preparation method of high-strength silver-copper alloy material according to claim 1, is characterized in that, described step 2) in Kufil bar be Ф 50-Ф 80mm.
3. the preparation method of high-strength silver-copper alloy material according to claim 1, is characterized in that, the concrete steps of described vacuum melting technology are:
By in copper good for proportioning, silver-colored disposable loading vacuum melting furnace, wherein Ag loads in hopper, then vacuumize, power transmission is started when vacuum tightness reaches 0.1-0.5Pa, increased wattage, adds silver when temperature arrives 1200 DEG C, and stirs, when temperature is poured into a mould to during 900-950 DEG C, cooling obtains Kufil bar.
4. the preparation method of high-strength silver-copper alloy material according to claim 1, is characterized in that, described step 3) smelting temperature be 1100-1200 DEG C.
5. the preparation method of high-strength silver-copper alloy material according to claim 1, is characterized in that, described step 3) smelting time be 20-30min.
6. the preparation method of high-strength silver-copper alloy material according to claim 1, is characterized in that, every time deflection of described drawing is 10-15%.
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| CN105513665A (en) * | 2015-12-02 | 2016-04-20 | 芜湖楚江合金铜材有限公司 | Low-resistivity special-shape copper alloy wire rod and production technology therefor |
| CN105336388A (en) * | 2015-12-02 | 2016-02-17 | 芜湖楚江合金铜材有限公司 | Electrical connector assembly copper alloy wire rod and production process thereof |
| CN106282651B (en) * | 2016-09-18 | 2018-07-17 | 上海康成铜业集团有限公司 | A kind of copper silver rare-earth alloy superfine wire and its production method |
| CN108265194A (en) * | 2018-01-09 | 2018-07-10 | 北京有色金属研究总院 | A kind of railway power through track copper alloy conductor and preparation method thereof |
| CN108866367A (en) * | 2018-07-24 | 2018-11-23 | 深圳市中科睿金贵材科技有限公司 | A kind of copper-silver alloy conducting wire and preparation method thereof |
| CN111519062A (en) * | 2020-04-28 | 2020-08-11 | 中国科学院合肥物质科学研究院 | High-strength high-conductivity copper-silver alloy and preparation method thereof |
| CN112530638B (en) * | 2020-10-19 | 2022-06-03 | 陕西斯瑞新材料股份有限公司 | Metal processing technology of copper braided metal wire soft connecting piece for transformer |
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Application publication date: 20140212 Assignee: Henan energy micro new material Polytron Technologies Inc Assignor: Henan University of Science and Technology Contract record no.: X2019980000493 Denomination of invention: Preparation method of high-strength silver-copper alloy material Granted publication date: 20150722 License type: Common License Record date: 20191105 |