CN1933037B - Method for producing copper alloy contact wire with excellent comprehensive performance - Google Patents
Method for producing copper alloy contact wire with excellent comprehensive performance Download PDFInfo
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- CN1933037B CN1933037B CN2006100481863A CN200610048186A CN1933037B CN 1933037 B CN1933037 B CN 1933037B CN 2006100481863 A CN2006100481863 A CN 2006100481863A CN 200610048186 A CN200610048186 A CN 200610048186A CN 1933037 B CN1933037 B CN 1933037B
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- 229910000881 Cu alloy Inorganic materials 0.000 title claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 title description 8
- 239000010949 copper Substances 0.000 claims abstract description 37
- 229910052802 copper Inorganic materials 0.000 claims abstract description 36
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 35
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 26
- 239000011777 magnesium Substances 0.000 claims abstract description 26
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000005266 casting Methods 0.000 claims abstract description 16
- 238000002360 preparation method Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 238000005097 cold rolling Methods 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims description 34
- 230000008018 melting Effects 0.000 claims description 34
- 239000000956 alloy Substances 0.000 claims description 24
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 23
- 229910045601 alloy Inorganic materials 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 18
- 238000007493 shaping process Methods 0.000 claims description 11
- 150000002910 rare earth metals Chemical class 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 7
- 238000002425 crystallisation Methods 0.000 claims description 6
- 230000008025 crystallization Effects 0.000 claims description 6
- OWXLRKWPEIAGAT-UHFFFAOYSA-N [Mg].[Cu] Chemical compound [Mg].[Cu] OWXLRKWPEIAGAT-UHFFFAOYSA-N 0.000 claims description 5
- -1 copper rare earth Chemical class 0.000 claims description 5
- 229910052684 Cerium Inorganic materials 0.000 claims description 4
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000009749 continuous casting Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 229910052747 lanthanoid Inorganic materials 0.000 claims description 2
- 150000002602 lanthanoids Chemical class 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000005096 rolling process Methods 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 3
- 239000000155 melt Substances 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 239000011135 tin Substances 0.000 description 18
- 229910052718 tin Inorganic materials 0.000 description 18
- 238000000034 method Methods 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910002059 quaternary alloy Inorganic materials 0.000 description 4
- 229910002058 ternary alloy Inorganic materials 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000003610 charcoal Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 201000006353 Filariasis Diseases 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- KRDOMHYKEZZOQY-UHFFFAOYSA-N [Sn].[Mg].[Cu] Chemical compound [Sn].[Mg].[Cu] KRDOMHYKEZZOQY-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 description 1
- PTVDYARBVCBHSL-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu] PTVDYARBVCBHSL-UHFFFAOYSA-N 0.000 description 1
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 description 1
- 229940112669 cuprous oxide Drugs 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Chemical group 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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Abstract
The invention is concerned with the copper alloy touching line and the preparation method with choiceness integrative performance that uses to improve the using performance of the touching line of the cable technology field. It is: the copper alloy is as the material that the material melts with the following percentage weight, magnesium 0.05~ 0.35%, stannum 0.35~0.05%, total quantity of impurity is smaller than 0.10%, remainder is copper; the above material makes to be the touching line by the steps of smelting, heat preservation, casting pole, pressing, cold rolling, molding rolling. The index of the touching line achieves and overruns the international similar product level, such as the intensity, the conductivity, the elongation ratio, the reverse, repeating bending, convolution.
Description
Technical field
Type of the present invention relates to a kind of preparation method who is used for the contact line conducting wire of electric railway, belongs to the cable technology field.
Background technology
In recent years, the electric railway operation mileage has fast development, is example with China, the railway electrification rate is near 30%, and the total development trend of electric railway turns to the Plain main line by the fortress, mountain area, transfers heavy duty to by underloading, change at a high speed by low speed, change passenger trains and freight trains are seperated into by passenger-cargo conllinear.The high speed development of electric railway is to required critical component---and the performance requirement of contact line conducting wire is improving constantly, and promptly requires high strength, high conductivity, weather burn into abrasion performance, good toughness and gets the stream effect.For this reason, the expert has done a large amount of research work at raising contact wire aspect of performance, these research work mainly concentrate on two aspects, one, be aspect the alloy material of contact wire use, as: the German Research personnel are used in the method that strengthens content of magnesium in the copper alloy and improve intensity, the Japanology personnel adopt and add tin in copper alloys, contact wire intensity is improved, but above-mentioned way has all been sacrificed the index (conductance has only 62.1%IACS) of conductance when improving intensity, and contact wire toughness is lower.Its two, be aspect the manufacturing process of contact wire.At present, the manufacture method of contact wire has continuous up-casting cold machine-shaping method and hot continuous casting and rolling cold machine-shaping method, and the former is cast as bar by water mold in oxygen-free atmosphere, by mechanical indexing mechanism the copper bar is drawn, then blank is through cold rolling, and drawing is made as finished product.Advantage is that anaerobic, impurity are few, so it is good to add man-hour plasticity, high conductivity (can reach 102%IACS), shortcoming be casting crystal grain thick (1.5-5.5mm), cause locomotive to get filariasis and spend greatly.The contact wire advantage that the hot continuous casting and rolling method of the latter is produced is grain refinement (crystallite dimension is generally about 0.025mm), but copper or Cu alloy material oxygen content can only be controlled between 300-500ppm in the course of processing melting, roll.The cuprous oxide that oxygen and copper form melts admittedly and form the fragility tissue between the copper crystal boundary, and then causes contact wire brittle failure phenomenon in processing or use.In sum, improving prior art, choose suitable copper alloy material, add rational production technology, is the key problem of making the high standard contact wire that meets the electric railway demand for development, also is problem demanding prompt solution.
Summary of the invention
The present invention is used to overcome the defective of prior art and a kind of preparation method with copper alloy contact wire of excellent comprehensive performances such as high strength, high conductivity, high tenacity is provided.
The alleged problem of the present invention solves with following technical proposals:
A kind of preparation method with copper alloy contact wire of excellent comprehensive performance, it is raw material with the copper alloy, described copper alloy is formed by the raw material melting of following weight percent: magnesium 0.05～0.35%, tin 0.35～0.05%, and total impurities is not more than 0.10%, and surplus is a copper; And undertaken by following operation:
A. melting: by proportioning get copper, magnesium, tin or copper, magnesium, tin, rare earth element is inserted the melting furnace melting, temperature is 1150 ± 30 ℃;
B. cast bar: continuous up-casting is made blank copper alloy bar;
C. extruding: on extruder, blank copper alloy bar is made extruding copper alloy bar through friction and Extrusion, crystallization again, shaping; Described extruding material base diameter: maximum pressure: 1000Mpa in the φ 12.5～φ 18mm, extruder cavity; Extruding copper alloy bar cross section: 300～450mm
2
D. drawing or cold rolling: with above-mentioned extruding copper alloy bar through drawing or the cold rolling thin bar of copper alloy of making;
E. roll forming or shaping drawing: the thin bar of above-mentioned copper alloy through roll forming or shaping drawing, is made the contact wire that the cross section has symmetrical groove.
Above-mentioned preparation method with copper alloy contact wire of excellent comprehensive performance, in the copper alloy raw material, add rare earth element, described rare earth element is a purity〉97% pure rare earth cerium, or contain 〉=the group of the lanthanides mishmetal of 47% cerium, addition is the 0.003-0.025% of raw material total weight.
Above-mentioned preparation method with copper alloy contact wire of excellent comprehensive performance, the total amount of magnesium and tin is no more than 0.55% in the described raw material proportioning.
Above-mentioned preparation method with copper alloy contact wire of excellent comprehensive performance before the described melting furnace melting operation, according to the ratio of copper: magnesium=4:1, is smelted into copper magnesium intermediate alloy with copper, magnesium earlier in vacuum melting furnace; Copper, rare earth are smelted into the copper rare earth intermediate alloy in the ratio of copper: rare earth=9:1 in vacuum melting furnace, again copper, tin raw material, above-mentioned intermediate alloy are inserted melting in melting furnace and the holding furnace by prescription, after insulation in two hours, on draw the copper alloy bar, replenish with the carrying out of continuous up-casting according to said ratio afterwards and add.
Above-mentioned preparation method with copper alloy contact wire of excellent comprehensive performance, described holding furnace temperature remains on 1140 ± 20 ℃.
The present invention is directed to the problem that performance index such as existing contact wire intensity, conductance, toughness are difficult to take into account improves, its selection is matrix with copper, add small amount of magnesium, tin or magnesium, tin and rare earth element, obtain the alloy formula of an optimization, form a kind of novel copper magnesium tin ternary alloy three-partalloy or copper magnesium tin rare earth quaternary alloy material.Improve existing contact wire processing method on this basis, hot working adopts main frequency furnace melting upward-casting process to prepare anaerobic blank copper alloy bar, get its anaerobic, impurity is few, plasticity good, conductance is high advantage, cold working increase with modern extrusion technique on continuous extruder with blank copper alloy bar through friction and Extrusion, crystallization again, be shaped and make the critical process of extruding copper alloy bar, solved the thick problem of continuous up-casting bar crystal grain and then improved and got the stream effect.Contact wire intensity according to the inventive method manufacturing reaches international superhigh intensity contact wire level; Conductance meets or exceeds international copper alloy contact wire level; Elongation, reverse, toughness index such as alternating bending, coiling is also considerably beyond international like product level.Because material is the anaerobic fine grain, solve the contact wire brittle failure in the current electric railway both at home and abroad and got stream weak effect two hang-ups, be expected to become the advanced technology of new generation that contact wire is made the field.
The invention will be further described below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 draws the stove schematic diagram on being;
Fig. 2 is the continuous extruder schematic diagram;
Fig. 3 is quaternary alloy contact wire technological process of production figure;
Fig. 4 is ternary alloy three-partalloy contact wire technological process of production figure.
Number in the figure is expressed as follows: 1. melting furnace; 2. water jacket; 3. charcoal; 4. coil; 5. iron core; 6. lapies; 7. crystallizer; 8. water inlet; 9. delivery port; 10. holding furnace; 11. crystalline flake graphite; 12. clamping wheel; 13. on draw bar; 21. blank copper alloy bar; 22. squeegee roller; 23. main shaft; 24. cavity; 25. mould; 26. cooling jacket; 28. extruding copper alloy bar; 29. refractory masses.
Embodiment
Its contact wire raw material of the method for the invention is the quaternary copper alloy that adds the ternary copper-alloy of small amount of magnesium, tin or add small amount of magnesium, tin and rare earth element in the matrix of copper.Wherein, magnesium and tin are fused in the copper and can form solid solution with copper, the complex intensifying effect is played in the aggravation distortion of lattice.Add rare earth element except that can crystal grain thinning, improve intensity, eliminate or reduce the component segregation, can also improve the electric conductivity of alloy.Addition and proportioning by strictness control magnesium, tin, rare earth element reach when improving the strength of materials and conductance, can also make alloy material have high toughness index.Test shows, above-mentioned ternary or quaternary alloy, fine copper, silver-bearing copper intensity height that the bar base behind continuous up-casting is made than same procedure, the conductance and the good toughness of copper alloys such as the copper magnesium of making than same procedure, copper tin.The relation of described alloy adding and performance is followed following rule substantially: with the increase (the particularly increase of magnesium elements) of magnesium, tin element addition, alloy strength improves but conductance descends to some extent.During for contact wire conductivity 〉=80%IACS, magnesium, tin element total amount are no more than 0.45%; During contact wire conductivity＜80%IACS, magnesium, tin element total amount are no more than 0.55%.
The preparation method of ternary of the present invention or quaternary copper alloy contact wire comprises hot worked melting, continuous up-casting and cold worked extruding drawing, and its technological process is referring to Fig. 3, Fig. 4.
Figure 1 shows that production of copper rod of metal alloy base on draw the schematic diagram of stove, the left side be a melting furnace 1 among the figure, the right side is holding furnace 10 (or deserve to be called draw stove), middlely adopts the refractory material partition, but is communicated with in its underpart, all adopts the line-frequency induction mode to heat.Its primary coil 4 connects power supply, and secondary coil promptly is the copper water of fusing.Raw material at first melts in melting furnace, flows into holding furnace then, because the channel 6 in the molten copper stove, holding furnace upwards springs up after being heated under electromagnetic action, forms strong convection current, and stirring action is played in this convection current, makes alloy material become even.The covering of charcoal 3, crystalline flake graphite 11 has completely cut off oxygen, under the high temperature anaerobic condition, is reducing atmosphere in charcoal, graphite medium and the oxygen burning generation carbon monoxide achievements stove simultaneously in stove.Crystallizer 7 is arranged in the holding furnace, and the alloy liquid of homogenization of composition is through crystallizer continuous up-casting copper rod of metal alloy base 13.The smelting copper alloy temperature is controlled at 1150 ± 10 ℃, and the holding furnace temperature is controlled at 1140 ± 10 ℃, and cold in-water temperature 20-30 ℃, leaving water temperature 30-50 ℃.Produce the blank material copper alloy bar of anaerobic, even tissue through continuous up-casting.
The blank copper alloy bar anaerobic that continuous up-casting is produced but crystal grain is thick, mechanical property is not good enough, for head it off the present invention has increased crucial extrusion process in cold working, promptly on the extruder with the casting blank copper alloy bar 21 under squeegee roller 22 powerful extrusion force effects, friction, extruding, crystallization again, shaping, make extruding copper alloy bar 28 through mould 25 again, the cooling water that flows in the cooling jacket 26 is to reduce the temperature of mould 25.Figure 2 shows that the continuous extruder schematic diagram.Above-mentioned continuous extrausion process makes draws anaerobic base bar realization crystallization more again, and changing casting 1.5～5.5mm coarse-grain is the fine grain of crystallite dimension less than 0.025mm.Through this operation, base bar intensity has improved 30-50Mpa, and alternating bending, antitorque commentaries on classics, coiling-resistant performance also all are significantly improved.The copper alloy pressure ram of making after the extruding through rolling, drawing, shaping processing, is made the contact wire that the cross section has symmetrical groove again, reach have high strength, excellent comprehensive performances such as high conductivity, high tenacity.
Product of the present invention and the contrast of similar products at home and abroad technical indicator can see the following form:
Below provide several specific embodiments: get raw material in following ratio:
Quaternary alloy: (weight %)
| Title | Embodiment 1 | |
|
|
|
| Magnesium | 0.07 | 0.05 | 0.10 | 0.13 | 0.35 |
| Tin | 0.35 | 0.28 | 0.20 | 0.18 | 0.04 |
| Rare earth element | 0.005 | 0.010 | 0.025 | 0.006 | 0.010 |
| Copper | Surplus | Surplus | Surplus | Surplus | Surplus |
| Other impurity summations | ≤0.10 | ≤0.10 | ≤0.10 | ≤0.10 | ≤0.10 |
Ternary alloy three-partalloy: (weight %)
| Title | Embodiment 1 | |
|
|
|
| Magnesium | 0.05 | 0.12 | 0.15 | 0.35 | 0.17 |
| Tin | 0.35 | 0.15 | 0.13 | 0.05 | 0.09 |
| Copper | Surplus | Surplus | Surplus | Surplus | Surplus |
| Other impurity summations | ≤0.10 | ≤0.10 | ≤0.10 | ≤0.10 | ≤0.10 |
The preparation method:
A. melting: will insert melting in the melting furnace by the raw material that the embodiment proportioning is got, or, copper, magnesium are smelted into copper magnesium intermediate alloy in vacuum melting furnace earlier according to the ratio of copper: magnesium=4:1; Copper, rare earth are smelted into the copper rare earth intermediate alloy in the ratio of copper: rare earth=9:1 in vacuum melting furnace, again copper, tin raw material, intermediate alloy are inserted the melting furnace melting by prescription, the melting furnace temperature is controlled at 1150 ± 10 ℃.
B. insulation: insulation is carried out in holding furnace.The main effect of holding furnace is for continuous casting provides the stable alloy that comprises temperature liquation, except that a stove just will equally with melting furnace add the copper alloy each component, draws behind the bar and no longer adds, and required alloy liquation is provided by melting furnace.
C. cast bar: crystallizer is directly inserted in the holding furnace liquid alloy, and continuous up-casting is made copper magnesium ashbury metal bar base or copper magnesium tin rare earth alloy bar base.Cold in-water temperature 20-30 ℃, leaving water temperature 30-50 ℃, bar base diameter is 16mm.
D. extruding: on extruder, copper alloy is cast the bar base and make the copper alloy pressure ram through friction and Extrusion, crystallization again, shaping, used extruder size: TJ-350, efficiency average: 760kg/h, the nominal diameter of squeegee roller 22: 350mm, main motor current: 160KW, material base diameter: φ 16mm, maximum pressure: 1000Mpa in the cavity 24, product cross section: 300mm
2
E. drawing: above-mentioned copper alloy pressure ram is made the thin bar of copper alloy through drawing.
F. the thin bar of above-mentioned copper alloy is made through roll forming or drawing again that specification is 85,110,120, the copper alloy contact wire of 150mm2.
G. check, pack.
Claims (3)
1. preparation method with copper alloy contact wire of excellent comprehensive performance, it is characterized in that it is raw material with the copper alloy, described copper alloy is formed by the raw material melting of following weight percent: magnesium 0.05～0.35%, tin 0.35～0.05%, total impurities is not more than 0.10%, and surplus is a copper; In addition, add rare earth element in the copper alloy raw material, described rare earth element is the pure rare earth cerium of purity＞97%, or contains 〉=the group of the lanthanides mishmetal of 47% cerium, and addition is the 0.003-0.025% of raw material total weight;
Preparation is undertaken by following operation:
A. melting: before melting furnace melting operation, earlier according to copper: the ratio of magnesium=4: 1 is smelted into copper magnesium intermediate alloy with copper, magnesium in vacuum melting furnace; With copper, rare earth in copper: the ratio of rare earth=9: 1 is smelted into the copper rare earth intermediate alloy in vacuum melting furnace, again copper, tin raw material, above-mentioned intermediate alloy are inserted melting in melting furnace and the holding furnace by prescription, and temperature is 1150 ± 30 ℃;
B. cast bar: through two hours the insulation after, on draw the copper alloy bar, continuous casting is made blank copper alloy bar; Replenish with the carrying out of continuous up-casting according to said ratio afterwards and add raw material;
C. extruding: on extruder, blank copper alloy bar is made extruding copper alloy bar through friction and Extrusion, crystallization again, shaping; Described extruding material base diameter: maximum pressure: 1000Mpa in the φ 12.5～φ 18mm, extruder cavity; Extruding copper alloy bar cross section: 300～450mm
2
D. drawing or cold rolling: with above-mentioned extruding copper alloy bar through drawing or the cold rolling thin bar of copper alloy of making;
E. roll forming or shaping drawing: the thin bar of above-mentioned copper alloy through roll forming or shaping drawing, is made the contact wire that the cross section has symmetrical groove.
2. according to the described preparation method with copper alloy contact wire of excellent comprehensive performance of claim 1, it is characterized in that: the total amount of magnesium and tin is no more than 0.55% in the described raw material proportioning.
3. according to the described preparation method with copper alloy contact wire of excellent comprehensive performance of claim 2, it is characterized in that: described holding furnace temperature remains on 1140 ± 20 ℃.
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| CN113174510A (en) * | 2021-04-26 | 2021-07-27 | 中铁建电气化局集团康远新材料有限公司 | High-strength bending-resistant copper alloy dropper wire and preparation method thereof |
| CN114472578A (en) * | 2022-01-13 | 2022-05-13 | 武汉正威新材料科技有限公司 | Re-doped copper-tin alloy contact wire and preparation method thereof |
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