CN1218840A - Rare-earth copper alloy contact wire and its producing equipment and method - Google Patents
Rare-earth copper alloy contact wire and its producing equipment and method Download PDFInfo
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- CN1218840A CN1218840A CN 98114204 CN98114204A CN1218840A CN 1218840 A CN1218840 A CN 1218840A CN 98114204 CN98114204 CN 98114204 CN 98114204 A CN98114204 A CN 98114204A CN 1218840 A CN1218840 A CN 1218840A
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Abstract
The present invention relates to wire and cable manufacture, and provides a rare-earth copper alloy contact wire which contains mixed rare-earth or metal cerium in 0.002-0.1% other than copper or copper alloy and has high working temperature, high strength, high straightness and high overload capacity. It is manufactured through copper alloy smelting at 1150-1160 deg.c inside the melting cavity of industrial frequency induction furnace and pulling at 1120-1160 deg.c by inserting crystallizer into heat maintaining cavity. The high-temperature smelting and low-temperature pulling technology can make crystal grain fine, eliminate component segregation and raise service life by 40%, and the product is suitable for use as overhead contact line of high-speed electrified railway.
Description
The invention belongs to electric wire preparation, particularly a kind of rare-earth copper alloy contact wire that is used for the electrification railway contact net lead, producing apparatus and preparation method thereof.
At present, following technology is mainly taked in the preparation of the built on stilts copper contact wire of domestic electric railway: on draw → cold rolling → cold drawn.For the comprehensive breaking strength that guarantees copper contact wire can satisfy the TB-2810 requirement, drawing shank diameter generally will remain on the level of Φ 26-29mm, because it is thicker to draw shank diameter, core is difficult for cooling fully, to draw casting bar crystal grain thick thereby cause, core tissue looseness, thus the comprehensive breaking strength of reduction copper contact wire reduces security and reliability that contact system moves.
Copper contact wire is bad owing to heatproof rises performance, be mainly used in the contact line conducting wire of the electric railway of low speed, and along with fast development of national economy, electric railway just develops towards the direction of high speed, heavy duty, this just needs quasi high-speed, the high-speed electric railway of development, and along with the increase of speed, contact line conducting wire with aggravated by the friction of electric slide plate, cause the strength degradation of lead, can not bear high-speed required hightension, therefore, copper contact wire is not suitable for quasi high-speed, high-speed electrified line, for example: under 300 ℃ of conditions, 120mm
2The comprehensive breaking strength of copper contact wire reduce to below the 27KN by the 42KN under the normal temperature, Vickers' hardness reduces to 55 by 110.
Copper alloy contact wire adds alloying elements such as silver, tin and makes in copper, owing to added these alloying elements, aggravated lattice distortion, thereby the hot strength and the wear resistance of osculatory have been improved, thereby be applicable to quasi high-speed, high-speed electric railway, but add after the alloying elements such as silver, tin, brought problems such as composition segregation and crystal grain is thick, thereby made the planeness of copper alloy contact wire and comprehensive breaking strength also be difficult to satisfy fully requirement quasi high-speed, high-speed electric railway.
The objective of the invention is to overcome above technical deficiency, provide a kind of hot strength height, good straightness degree, the rare-earth copper alloy contact wire that anti-overload ability is strong, producing apparatus and preparation method thereof.
The invention is characterized in: (1) rare-earth copper alloy contact wire is that copper or copper alloy are formed by the rare earth metal Re surplus of add-on 0.002-0.1%, adds rare earth, and crystal grain thinning improves intensity and eliminates component segregation; (2) use the repeatedly function composite by electromagnetic stirring of two or three line frequency furnaces, eliminate component segregation; (3) utilize the end of the middle cover in the crystallizer to contact to realize with overcoat in the axial location of cover, to guarantee tube chamber gap uniformity, guarantee the refrigerative homogeneity, simultaneously,, alleviated component segregation because cooling at 4-6mm, has been strengthened in the tube wall gap; (4) utilize high melt, draw on the low temperature, also can alleviate component segregation; (5) draw processing parameter on reasonably, guarantee the quality of rare earth alloy bar.
By above-mentioned measure, strengthened hot strength and wear resistance, have higher planeness simultaneously, improved the security and the reliability of rare-earth copper alloy contact wire comprehensive breaking strength and contact system operation, can satisfy requirement quasi high-speed, high-speed electric railway.
Specify with embodiment below in conjunction with accompanying drawing.
Fig. 1 shows and draws the protecting wall structure sectional view on the two-chamber.
Fig. 2 shows the mold structure sectional view.
Fig. 3 shows the rare-earth copper alloy contact wire process flow sheet.
Among Fig. 1, (1)-crystallizer; (2)-on draw the furnace wall; (3)-lapies; (4)-charging opening; (5)-dividing plate
Among Fig. 2, (1-1)-the copper bar; (1-2)-overcoat; (1-3)-middle cover; (1-4)-the Nei cover; (1-5)-adapter sleeve; (1-6)-graphite mo(u)ld
A kind of rare-earth copper alloy contact wire contains rare earth (Re) 0.002-0.1% (weight meter), and rare earth is norium or metallic cerium Ce, and surplus is copper or copper alloy.Copper alloy is to add 0.08-0.12% (weight meter) silver-colored Ag or add the silver-colored Ag of 0.04-0.06% (weight meter), 0.08-0.12% (weight meter) tin Sn in copper.
A kind of rare-earth copper alloy contact wire producing apparatus, on draw the crystallizer (1) of installing in the body of heater (2), central part is cooling copper alloy bar 1-(1), top is interior cover 1-(4), bottom overcoat graphite mo(u)ld 1 (6), adapter sleeve 1-(5), middle cover 1-(3), location in overcoat 1-(2), have cooling-water duct in middle cover 1-(3) end, making overcoat 1-(2) and middle cover 1-(3), middle cover 1-(3) is 4-6mm with the gap of middle cover 1-(3).
A kind of rare-earth copper alloy contact wire preparation method, melting rare-earth copper alloy temperature is 1500-1160 ℃ in the line frequency furnace melt chamber, in incubation cavity, insert crystallizer, drawing shank diameter is Φ 26-29mm, and drawing temperature on the low temperature is 1140 ± 20 ℃, draws rod up-leading speed 190-280mm/min, 30 ± 10 ℃ of inflow temperatures, cooling water pressure 0.2-0.4MPa, 8-16 ℃ of the Inlet and outlet water temperature difference, pitch 2-3mm.
Concrete preparation technology's implementation process of the present invention is as follows:
Rare-earth copper alloy contact wire, rare earth are norium or metallic cerium.
Norium should meet the GB4153-84 standard-required, and its technical requirements is as follows:
(1), outward appearance should be silver gray, the ingot metal surface should be clean, do not have tangible mechanical inclusion.
(2), the trade mark and chemical ingredients should meet the following table regulation:
| Product grade | Chemical Composition % | |||||
| The total rare earth (TRE) metal content is not less than | Cerium content is not less than in the rare earth | Foreign matter content is not more than | ||||
| ?Fe | ?Si | ?S | ?P | |||
| ?RECe-48 | ????99 | ????48 | ?0.5 | ?0.07 | ?0.02 | ?0.01 |
| ?RECe-45 | ????98 | ????45 | ?1.0 | ?0.15 | ?0.02 | ?0.01 |
Metallic cerium should meet request of national standard, requires the content of cerium in the metal should be greater than 98%.
Copper is to meet the 1# electrolysis copper coin of national standard or other copper materials that chemical ingredients meets 1# electrolysis copper coin.
Rare earth yellow gold osculatory CTHA type preparation process:
Feed intake first: calculate copper liquid weight in the stove, the rare earth by 0.05%, 0.1% silver add in the stove, insulation was drawn after half an hour.
Process control:
(1), scale gets electrolysis copper coin or the suitable copper material 50Kg of chemical ingredients, the oven dry back adds in the body of heater from reinforced (4) of drawing furnace wall (2).
(2), every 50Kg copper, add rare earth (Re) 25g, silver-colored 50g, specifically adding method is: 25g rare earth and 50g silver are encapsulated in one section copper pipe, join from charging opening (4) then and contain the drawing in the furnace wall (2) of 2 channels (3).
(3), Jia Liao frequency and the speed of drawing bar and to draw the radical of bar relevant.Grasp according to the temperature of liquid level and the height of liquid level, when temperature reaches reinforced on the temperature controlling range in limited time.After reinforced, furnace temperature descends.Feed intake when furnace temperature reaches the temperature upper control limit once more again, do auxiliary the adjustment by adjusting modes such as voltage of supply again when finding that liquid level is too high or too low, copper liquid temperature is controlled at 1140 ± 20 ℃.
The technical feature of rare-earth copper alloy contact wire CTHA-120
| Project | Standard value | Measured value | ||
| Pull-off force KN | ≥42 | ????46.3 | ||
| Elongation % | ≥3 | ????4.4 | ||
| Crooked (inferior) | ≥8 | ????8 | ||
| Reverse (week) | ≥3 | ????5 | ||
| Planeness | ????0.13～0.18 | |||
| Resistivity (20 ℃) Ω .mm 2/m | 0.01786 | ????0.017413 | ||
| Oven test | Test conditions | 300 ℃ of temperature; 2 hours time | ||
| Soft attitude pull-off force KN | ≥37.8 | ????44.0 | ||
Rare earth silver, tin, copper alloy contact wire CTHB type preparation process:
Feed intake first: calculate copper liquid weight in the stove, the silver (Ag) of rare earth cerium (Ce) 0.05% by 0.05%, 0.10% tin (Sn) adds in the stove, insulation was drawn after half an hour.
Process control:
(1), scale gets electrolysis copper coin or the suitable copper material 50Kg of chemical ingredients, the oven dry back adds in the body of heater from reinforced (4) of drawing furnace wall (2).
(2), every 50Kg copper, add rare earth cerium Ce25g, silver-colored Ag25g, tin Sn50g, specifically adding method is: 25g rare earth, 25g silver, 50g tin are encapsulated in one section copper pipe, join from charging opening (4) then and contain the drawing in the furnace wall (2) of 2 channels (3).
(3), Jia Liao frequency and the speed of drawing bar and to draw the radical of bar relevant.Grasp according to the temperature of liquid level and the height of liquid level, when temperature reaches reinforced on the temperature controlling range in limited time.After reinforced, furnace temperature descends.Feed intake when furnace temperature reaches the temperature upper control limit once more again, do auxiliary the adjustment by adjusting modes such as voltage of supply again when finding that liquid level is too high or too low, copper liquid temperature is controlled at 1140 ± 20 ℃.
The technical feature of rare-earth copper alloy contact wire CTHB-120
| Project | Standard value | Measured value | ||
| Pull-off force KN | ????≥43.2 | ????46.0 | ||
| Elongation % | ????≥3.0 | ????3.2 | ||
| Crooked (inferior) | ????≥8 | ????8 | ||
| Reverse (week) | ????≥3 | ????11 | ||
| Planeness | ??0.13～0.18mm | |||
| Resistivity (+20 ℃) Ω .mm 2/m | ????0.01915 | ????0.01906 | ||
| Oven test | Test conditions | 300 ℃ of temperature; 2 hours time | ||
| Soft attitude pull-off force KN | ≥38.38 | ????44.30 | ||
Rare-earth copper alloy contact wire CT type preparation process:
Feed intake first: calculate copper liquid weight in the stove, the ratio by 0.02% adds the rare earth cerium, draws after being incubated half an hour.
Process control:
(1), scale gets electrolysis copper coin or the suitable copper material 50Kg of chemical ingredients, the oven dry back adds in the body of heater from reinforced (4) of drawing furnace wall (2).
(2), every 50Kg copper, add rare earth cerium Ce10g, specifically adding method is: 10g rare earth cerium is encapsulated in one section copper pipe, joins from charging opening (4) then and contain the drawing in the furnace wall (2) of 2 channels (3).
(3), Jia Liao frequency and the speed of drawing bar and to draw the radical of bar relevant.Grasp according to the temperature of liquid level and the height of liquid level, when temperature reaches reinforced on the temperature controlling range in limited time.After reinforced, furnace temperature descends.Feed intake when furnace temperature reaches the temperature upper control limit once more again, do auxiliary the adjustment by adjusting modes such as voltage of supply again when finding that liquid level is too high or too low, copper liquid temperature is controlled at 1140 ± 20 ℃.
The technical feature of rare-earth copper alloy contact wire CT-110
| Pull-off force (KN) is no less than | Actual measurement | Elongation % is no less than | Actual measurement | Reverse (to destroying) and be not less than (week) | Actual measurement | Bent repeatedly (to destroying) number of times is no less than | Actual measurement | Resistivity Ω mm 2/ m is not more than | Actual measurement |
| 39.96 | ?42.4 | ????3.0 | ?4.0 | ????3 | ????8 | ????8 | ?16 | ?0.01768 | 0.01738 |
The invention belongs to the electric wire preparation, provide a kind of hot strength height, good straightness degree, the rare-earth copper alloy contact wire that anti-overload ability is strong, producing apparatus and preparation method thereof.Wherein, rare earth copper closes osculatory and contains norium or metallic cerium 0.002-0.1%, and surplus is copper or copper alloy, and melting rare-earth copper alloy temperature is 1150-1160 ℃ in the line frequency furnace melt chamber, insert crystallizer in incubation cavity, drawing temperature on the low temperature is 1140 ± 20 ℃.Adopt on high melt, the low temperature and draw technology, crystal grain thinning is eliminated the composition segregation, improves 40% work-ing life, is applicable to quasi high-speed, high-speed electric railway overhead contact line.
Claims (5)
1, a kind of rare-earth copper alloy contact wire is characterized in that containing rare earth (Re) 0.002-0.1% (weight meter), and rare earth is norium or metallic cerium Ce, and surplus is copper or copper alloy.
2, a kind of rare-earth copper alloy contact wire according to claim 1 is characterized in that adding in the copper alloy 0.08-0.12% (weight meter) silver-colored Ag or the silver-colored Ag of 0.04-0.06% (weight meter), 0.08-0.12% (weight meter) tin Sn.
3, a kind of rare-earth copper alloy contact wire producing apparatus, it is characterized in that drawing the crystallizer (1) of installing in the body of heater (2), central part is cooling copper alloy bar 1-(1), top is interior cover 1-(4), bottom overcoat graphite mo(u)ld 1-(6), adapter sleeve 1-(5), middle cover 1-(3), location in overcoat 1-(2), have cooling-water duct in middle cover 1-(3) end, making overcoat 1-(2) and middle cover 1-(3), middle cover 1-(3) is 4-6mm with the gap of middle cover 1-(3).
4, a kind of rare-earth copper alloy contact wire preparation method, it is characterized in that melting rare-earth copper alloy temperature is 1150-1160 ℃ in the line frequency furnace melt chamber, insert crystallizer in incubation cavity, drawing shank diameter is Φ 26-29mm, and drawing temperature on the low temperature is 1140 ± 20 ℃.
5, a kind of rare-earth copper alloy contact wire preparation method according to claim 4 is characterized in that drawing rod up-leading speed 190-280mm/min, 30 ± 10 ℃ of inflow temperatures, cooling water pressure 0.2-0.4MPa, 8-16 ℃ of the Inlet and outlet water temperature difference, pitch 2-3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98114204 CN1218840A (en) | 1998-07-30 | 1998-07-30 | Rare-earth copper alloy contact wire and its producing equipment and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98114204 CN1218840A (en) | 1998-07-30 | 1998-07-30 | Rare-earth copper alloy contact wire and its producing equipment and method |
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| CN1218840A true CN1218840A (en) | 1999-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98114204 Pending CN1218840A (en) | 1998-07-30 | 1998-07-30 | Rare-earth copper alloy contact wire and its producing equipment and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100361235C (en) * | 2005-09-27 | 2008-01-09 | 邢台鑫晖铜业特种线材有限公司 | Ternary copper-alloy stranded conductor and contact line preparing method |
| CN100362596C (en) * | 2005-12-20 | 2008-01-16 | 郑茂盛 | High-strength high-conductivity copper alloy contact wire for rapid transit railway |
| CN102601332A (en) * | 2012-03-27 | 2012-07-25 | 白银有色集团股份有限公司 | Method for casting small-specification copper rod based on upward casting |
| CN1929037B (en) * | 2006-08-25 | 2012-11-07 | 邢台鑫晖铜业特种线材有限公司 | Copper alloy with excellent combination property for manufacturing elements of contacting net |
| CN105821237A (en) * | 2016-04-29 | 2016-08-03 | 山东大学 | Copper, silver and cerium alloy |
| CN105834386A (en) * | 2016-06-15 | 2016-08-10 | 江苏华龙铸铁型材有限公司 | Continuous casting device of high temperature alloy tubes and continuous casting method of high temperature alloy tubes |
| CN113547092A (en) * | 2021-07-22 | 2021-10-26 | 江阴金属材料创新研究院有限公司 | Multi-element copper alloy up-drawing furnace and up-drawing casting method |
-
1998
- 1998-07-30 CN CN 98114204 patent/CN1218840A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100361235C (en) * | 2005-09-27 | 2008-01-09 | 邢台鑫晖铜业特种线材有限公司 | Ternary copper-alloy stranded conductor and contact line preparing method |
| CN100362596C (en) * | 2005-12-20 | 2008-01-16 | 郑茂盛 | High-strength high-conductivity copper alloy contact wire for rapid transit railway |
| CN1929037B (en) * | 2006-08-25 | 2012-11-07 | 邢台鑫晖铜业特种线材有限公司 | Copper alloy with excellent combination property for manufacturing elements of contacting net |
| CN102601332A (en) * | 2012-03-27 | 2012-07-25 | 白银有色集团股份有限公司 | Method for casting small-specification copper rod based on upward casting |
| CN102601332B (en) * | 2012-03-27 | 2014-01-15 | 白银有色集团股份有限公司 | Method for casting small-specification copper rod based on upward casting |
| CN105821237A (en) * | 2016-04-29 | 2016-08-03 | 山东大学 | Copper, silver and cerium alloy |
| CN105821237B (en) * | 2016-04-29 | 2017-11-17 | 山东大学 | A kind of copper Ag-Ce alloy |
| CN105834386A (en) * | 2016-06-15 | 2016-08-10 | 江苏华龙铸铁型材有限公司 | Continuous casting device of high temperature alloy tubes and continuous casting method of high temperature alloy tubes |
| CN113547092A (en) * | 2021-07-22 | 2021-10-26 | 江阴金属材料创新研究院有限公司 | Multi-element copper alloy up-drawing furnace and up-drawing casting method |
| CN113547092B (en) * | 2021-07-22 | 2023-09-15 | 东莞市凤岗冠铸铜业有限公司 | Multi-element copper alloy upward furnace and casting method |
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