CN1226435C - Silver fibre heterogeneous reinforced rare earth copper base alloy and its production process - Google Patents
Silver fibre heterogeneous reinforced rare earth copper base alloy and its production process Download PDFInfo
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- CN1226435C CN1226435C CN 02110785 CN02110785A CN1226435C CN 1226435 C CN1226435 C CN 1226435C CN 02110785 CN02110785 CN 02110785 CN 02110785 A CN02110785 A CN 02110785A CN 1226435 C CN1226435 C CN 1226435C
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Abstract
The present invention relates to a silver fiber complex phase strengthening rare earth copper base alloy and a preparation process thereof. The copper base alloy has the components by the following weight percentage: 5.9 % to 6.1 % of Ag, 1.0 % to 2.2 % of Cr, 0.08 % to 0.10 % of Ce, 0.06 % to 0.08 % of La, 0 to 0.02 % of Nd, and Cu as the rest. In the process, raw materials Cu and Cr are put into a vacuum induction furnace and melted at the atmospheric pressure of less than 0.1Pa, and then, the vacuum induction furnace is filled with Ar to 40 to 50kPa; Ag is added to the vacuum induction furnace and melted, and the mixture in the vacuum induction furnace is stirred by electromagnetism; Ce, La and Nd are added to the vacuum induction furnace and melted, and after standing for 2 to 3 minutes, the mixed melts are cast into a rod shaped casting blank; the blank is thermally treated for 2 hours at a temperature of 450 DEG C and is treated by cold drawing deformation; when the cold drawing deformation degree eta is from 1.2 to 1.4, the treated blank is annealed at a temperature of 450 DEG C per hour; when the cold drawing deformation degree eta is from 1.9 to 2.0, the treated blank is annealed at a temperature of 400 DEG C per hour; when the cold drawing deformation degree eta is from 2.6 to 2.8, the treated blank is annealed at a temperature of 360 DEG C per hour. The present invention has the advantages that the content of the expensive element Ag is low; the melted and poured blank can be directly treated by cold deformation, and the times of the intermediate heat treatment are reduced from 5 times to 3 times; under the conditions of lowering the consumption of expensive metals and simplifying the process, the strength and the electric conductivity of the copper base alloy are the same as those of alloys containing 24% to 25% of Ag.
Description
Technical field
The present invention relates to a kind of copper base alloy.
Background technology
Progress of science and technology is more and more higher to the electro-conductive material performance demands.For example, the conductor coils that high-tech area medium-high magnetic field technology is used and the lead frame of large-scale integrated circuit still have good electrical conductivity when requirement can be born very high loads.Under this harsh working conditions, conventional conductor material is not competent, and the conductor material that necessarily requires high strength more to have excellent conductive performance simultaneously concurrently satisfies this type of science
The development need of technical field.
The intensity of conductor material and electroconductibility generally are the inverse function relation, and the measure that promptly improves intensity is a cost to reduce electroconductibility significantly often.Therefore, making great efforts to make material to keep high conductivity or slightly sacrifice electroconductibility and can improve intensity significantly simultaneously, is the focus of developing the novel conductor material at present.
By the immiscible alloying element of adding in the Cu matrix, and, be considered to the most rising high-strength highly-conductive material at present by the conjugated fibre phase strengthened copper alloy that strong strain process prepares.In this class material, novel copper-silver alloy has best intensity and electroconductibility matching relationship, thereby is subjected to enough attention at home and abroad, and having developed than conventional material at laboratory stage at present has the more conductor wires of premium properties.Yet, still exist many problem needs further to solve.For example, if will reach the matched well of high-strength high-conductivity, the Ag content in the alloy is higher, and consumption precious metal resource is more, has increased material cost significantly; Form the complete processing more complicated of original position fibre composite reinforcement, operation is many and constellation is uncertain, and is wayward in the production; Must carry out hot cogging predeformation and enough cold strain amounts be arranged, make the blank initial cross-section long-pending bigger, increase the difficulty of deformation processing process etc. for guaranteeing.Thereby, be necessary at the more novel alloy of these problem developments, to remedy above-mentioned deficiency.
Summary of the invention
The purpose of this invention is to provide the silver fibre heterogeneous reinforced rare earth copper base alloy that a kind of Ag content is lower, preparation process is simplified relatively, cost is low and still have the high-strength highly-conductive characteristic.
Silver fibre heterogeneous reinforced rare earth copper base alloy of the present invention, the weight percent of each component is as follows:
Material purity is 99.99% Ag 5.9%～6.1%
Material purity is 99.95% Cr 1.0%～2.2%
Material purity is 99.95% Ce 0.08%～0.10%
Material purity is 99.95% La 0.06%～0.08%
Material purity is 99.95% Nd 0～0.02%
Material purity be 99.99% Cu all the other;
Manufacturing process:
Dry with starting material Ag, Cu, Cr pickling and after fully cleaning, earlier Cu, Cr are placed vacuum induction furnace, melt being lower than under the 0.1Pa normal atmosphere, after leaving standstill degasification under 1100～1200 ℃, in stove, fill Ar to 40～50kPa, add Ag and fusing again, evenly add Ce, La and Nd rare earth element again through induction stirring, leave standstill the bar-shaped strand that poured into special diameter in 2～3 minutes after fusing and the induction stirring.Blank carries out the cold drawing distortion under the room temperature condition after thermal treatment in 450 ℃/2 hours, in deformation extent η=1.2～1.4, carried out respectively in 1.9～2.0 and 2.6～2.8 o'clock 450 ℃/1 hour, 400 ℃/1 hour and annealing in 360 ℃/1 hour.
The beneficial effect that the present invention has:
1) content of expensive elements A g is lower, can significantly reduce material cost, is beneficial to popularization;
2) molten directly cold deformation of injection material need not prior hot-work predeformation cogging, and intermediate heat treatment is reduced to 3 times by 5 times of routine, and machining process is simplified relatively;
3) under the condition that reduces precious metal consumption and simplified processing process effectively, its intensity and electroconductibility can reach the alloy level that contains 24%～25%Ag.Concrete reference data sees Table 1.
The relevant alloy of table 1 is in the breakdown point of determining under the conductivity condition (MPa)
| Announcement data source | Composition (weight %) | Relative conductivity (%IACS) | |||||||
| Ag | Cr | Ce | La | Nd | Cu | 65 | 70 | 75 | |
| Academic paper [1] Y.Sakai, et al.Acta Materialia, 1997,45 (3): 1017-1023 [2] K.Han et al.[2] K.Han et al.Materials Science and Engineering, 1999, A267:99-114 [3] S.I.Hong et al.Materials Seience and Engineering, 1999, A264:151-158 | 24～25 | - | - | - | - | All the other | 1350 | 1200 | 960～ 1000 |
| Academic paper [1] D.Raabe et al.Materials Science and Engineering, 2000, A291:186-197 | 3 | 10 | - | - | - | All the other | 710 | - | - |
| This laboratory simultaneous test | 24 | - | - | - | - | All the other | - | 1100 | 980～ 1050 |
| Alloy of the present invention | 5.9～ 6.1 | 1.0～ 2.2 | 0.08～ 0.10 | 0.06～ 0.08 | 0～ 0.02 | All the other | 1300～ 1350 | 1050～ 1150 | 850～ 1000 |
Embodiment
Mode one:
The purity weight percent is respectively 99.99%, 99.95%, 99.95%, 99.95% and 99.99% Ag, Cr, Ce, La and Cu, be respectively 5.9%Ag by weight percentage, 1.0%Cr, 0.08%Ce, 0.06%La, all the other are the ratio batching of Cu, earlier with Cu, Cr places vacuum induction furnace, melt being lower than under the 0.1Pa normal atmosphere, after leaving standstill degasification under 1100～1200 ℃, in stove, fill Ar to 40～50kPa, add Ag and fusing again, evenly add Ce and La rare earth element again through induction stirring, leave standstill after fusing and the induction stirring and poured into bar-shaped strand in 2～3 minutes.Ingot mould is the good pig mold of cooling conditions, copper mold or water cooled mo(u)ld.Blank is handled through 450 ℃/2 hours homogenizing, and surperficial turning adopts following steps to carry out deformation processing after removing defective: seven passage cold drawings to deformation extent η=1.4 → 450 ℃/annealing → five passage cold drawings in 1 hour to η=2.0 → 400 ℃/annealing → five passage cold drawings in 1 hour to η=2.8 → 360 ℃/annealing → 20 passage cold drawings in 1 hour are to η=6.0～～8.0.
Mode two:
The purity weight percent is respectively 99.99%, 99.95%, 99.95%, 99.95%, 99.95% and 99.99% Ag, Cr, Ce, La, Nd and Cu, be respectively 6.1%Ag by weight percentage, 2.2%Cr, 0.10%Ce, 0.08%La, 0.02%Nd, all the other are the ratio batching of Cu, earlier with Cu, Cr places vacuum induction furnace, melt being lower than under the 0.1Pa normal atmosphere, after leaving standstill degasification under 1100～1200 ℃, in stove, fill Ar to 40～50kPa, add Ag and fusing again, evenly add Ce again through induction stirring, La and Nd rare earth element leave standstill after fusing and the induction stirring and poured into bar-shaped strand in 2～3 minutes.Ingot mould is the good pig mold of cooling conditions, copper mold or water cooled mo(u)ld.
Blank is handled through 450 ℃/2 hours homogenizing, and surperficial turning adopts following steps to carry out deformation processing after removing defective: seven passage cold drawings to deformation extent η=1.4 → 450 ℃/annealing → five passage cold drawings in 1 hour to η=2.0 → 400 ℃/annealing → five passage cold drawings in 1 hour to η=2.8 → 360 ℃/annealing → 20 passage cold drawings in 1 hour are to η=6.0～8.0.
All obtained the alloy wire that the present invention proposes with above-mentioned two kinds of methods.According to the rational Match between blank green diameter and the η, can obtain the wire rod of different size.
Claims (1)
1. silver fibre heterogeneous reinforced rare earth copper base alloy is characterized in that:
1) weight percent of each component
Material purity is 99.99% Ag 5.9%～6.1%
Material purity is 99.95% Cr 1.0%～2.2%
Material purity is 99.95% Ce 0.08%～0.10%
Material purity is 99.95% La 0.06%～0.08%
Material purity is 99.95% Nd 0～0.02%
Material purity be 99.99% Cu all the other;
2) manufacturing process
With starting material Ag, Cu, the Cr pickling is also fully cleaned the back oven dry, earlier with Cu, Cr places vacuum induction furnace, melt being lower than under the 0.1Pa normal atmosphere, after leaving standstill degasification under 1100～1200 ℃, in stove, fill Ar to 40～50kPa, add Ag and fusing again, evenly add Ce again through induction stirring, La and Nd rare earth element, leave standstill after fusing and the induction stirring and poured into bar-shaped strand in 2～3 minutes, blank carries out the cold drawing distortion under the room temperature condition after thermal treatment in 450 ℃/2 hours, in deformation extent η=1.2～1.4,1.9 carried out respectively in～2.0 and 2.6～2.8 o'clock 450 ℃/1 hour, 400 ℃/1 hour and annealing in 360 ℃/1 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02110785 CN1226435C (en) | 2002-02-04 | 2002-02-04 | Silver fibre heterogeneous reinforced rare earth copper base alloy and its production process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02110785 CN1226435C (en) | 2002-02-04 | 2002-02-04 | Silver fibre heterogeneous reinforced rare earth copper base alloy and its production process |
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| CN1380431A CN1380431A (en) | 2002-11-20 |
| CN1226435C true CN1226435C (en) | 2005-11-09 |
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| CN 02110785 Expired - Fee Related CN1226435C (en) | 2002-02-04 | 2002-02-04 | Silver fibre heterogeneous reinforced rare earth copper base alloy and its production process |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293212C (en) * | 2004-02-23 | 2007-01-03 | 西安交通大学 | Alloy of copper |
| CN100365154C (en) * | 2005-11-22 | 2008-01-30 | 昆明贵金属研究所 | Cu-Ag-RE alloy in-situ nano fiber composite material |
| CN105803246B (en) * | 2016-03-24 | 2017-07-25 | 东北大学 | A kind of high strength high conductivity copper base composite material and preparation method thereof |
| CN110004320B (en) | 2019-05-15 | 2020-07-28 | 东北大学 | High-strength high-conductivity Cu-Ag-Sc alloy and preparation method thereof |
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2002
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