CN1715097B - High conductivity high strength electric vehicle overhead line and its producing method - Google Patents
High conductivity high strength electric vehicle overhead line and its producing method Download PDFInfo
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- CN1715097B CN1715097B CN 200510082133 CN200510082133A CN1715097B CN 1715097 B CN1715097 B CN 1715097B CN 200510082133 CN200510082133 CN 200510082133 CN 200510082133 A CN200510082133 A CN 200510082133A CN 1715097 B CN1715097 B CN 1715097B
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Abstract
The invention relates to a trolley wire with high tensile-strength and electricity conductive rate and a manufacture method for the trolley wire which includes the following working procedures: obtaining casting material comprising 0.12to 0.3 weight percent of Ag, 0.01 to 0.05 percent weight of oxygen, copper and unavoidable impurities through continuous castling; carrying out thermal processing on the casting material with the temperature larger or equal to 600 DEG C and the thermal processing rate larger or equal to 80 percent to obtain a wire with the diameter larger or equal to 25mm; carrying out cold processing on the wire with the temperature less than or equal to 150 DEG C and the cold processing rate larger or equal to 70 percent to obtain the following trolley wire (1) or (2). When the nominal cross-sectional area of the trolley wire(1) is 150 to 170mm <2>, the tensile-strength is larger or equal to 400N/mm<2> and the electricity conductive rate is larger or equal to 97 IACS(percent); when the nominal cross-sectional area of the trolley wire(2) is 80 to 120 mm<2>, the tensile-strength is larger or equal to 420N/mm<2> and the electricity conductive rate is larger or equal to 97 IACS(percent).
Description
Technical field
The present invention relates to the high trolley wire of conductivity water temperature and depth height and intensity with and manufacture method.The manufacture method and the high conductivity high strength electric vehicle overhead line that particularly relate to the high conductivity high strength electric vehicle overhead line that also can reduce manufacturing cost.
Background technology
As the trolley wire material, the hard copper that is made of tough pitch copper etc. uses the earliest in history, also is commonly used now.Other contain copper alloy that is useful on the silver (Ag) that improves resistance to effect of heat and import and the copper alloy that contains the tin (Sn) that is useful on the raising wear resistance and also are used in reality.Trolley wire exists long-time energising heating can cause the temperature rising of softening and short time part can cause the problem of softening, so require the resistance to effect of heat height.In addition, also require to the high wear resistance of the slip of pantograph.
The characteristic of trolley wire of having put down in writing the trolley wire that constitutes by tough pitch copper in the special public clear 59-43332 communique, having constituted by Ag and the copper (Cu) of 0.08～0.4 quality % and the trolley wire that constitutes by Sn and the copper of 0.16～0.35 quality %.Described in the trolley wire characteristic that constitutes by Sn and Cu such as the invention of the public clear 59-43332 communique of spy, because Sn is solid-solubilized among the Cu, so specific tensile strength is big mutually with the trolley wire that is made of Ag and Cu and the trolley wire that is made of tough pitch copper.By the trolley wire that Sn and Cu constitute, its conductivity water temperature and depth is low to be about 70～85IAC (%), but because pulling strengrth is big, so but still in the scope of practical application.In addition, the trolley wire that contains Ag with added comparing of Sn, its conductivity water temperature and depth height, but pulling strengrth is low, shows easy loss, poor heat resistance.In addition, the waste of the trolley wire that is made of tough pitch copper is also big.The life-span of the trolley wire that waste is big is short naturally.
In addition, " Iron Dao Gross grinds Reported and accuses (Railway Technical Research Institute (RTRI) Report), Vol.12, No.10,39～44 Page, 1998 " ト ロ リ Line material と て separates out the Strong Du Xing Copper alloy Xing of Nai Jiu Evaluation value " " (" railway always grinds report (Railway TechnicalResearch Institute (RTRI) Report), Vol.12, No.10,39～44 pages, 1998 " as the durability evaluation of the precipitation hardenable copper alloy of trolley wire " ") put down in writing hard copper, Cu-Ag, Cu-Sn, the heat-resistance test result of three kinds of trolley wires that Cu-0.4%Cr-0.14%Zr-0.05% constitutes.Resistance to effect of heat uprises successively by said sequence.Cause in long-time heating and to show among the result of hardness change that the copper hardness under 100 hours situation of 180 ℃ of heating that adds Ag is softening.
In addition, above-mentioned railway always grinds report and tests about the conductivity water temperature and depth and the pulling strengrth of the alloy of above-mentioned material.From the result, contain the conductivity water temperature and depth height of the trolley wire of Ag, but pulling strengrth is not enough, so a loss slightly, just not much of that as the intensity of trolley wire, the precipitation hardenable copper alloy is superior as trolley wire.
Te Kaiping 11-189834 communique has been put down in writing and added alloying element in copper melt, makes molten alloyed copper, this molten alloyed copper utilization continuous casting hot rolling method is made the method for trolley wire.This spy opens in the flat 11-189834 communique and records, and molten alloyed copper is to add P copper melt is carried out deoxidation, adds alloying elements such as Co, Mn, Ni then and makes.
But, can not obtain having concurrently the trolley wire of high conductivity and pulling strengrth.The trolley wire that for example contains Ag, its conductivity water temperature and depth height, but resistance to effect of heat and pulling strengrth are low.In addition, special public clear 59-43332 communique patent, spy open flat 11-189834 communique and above-mentioned railway and always grind report and disclose low but the trolley wire that resistance to effect of heat and intensity are high of alloying elements such as Sn, the conductivity water temperature and depth of adding beyond the Ag.Therefore, can only obtain giving up the trolley wire of conductivity water temperature and depth or a certain characteristic of pulling strengrth now.
In addition, as nearest technology trend, particularly in original circuit, used copper system or steelmet as the material of slide plate (ス ラ イ ダ one) in the past, bring into use carbon system now, the wastage rate of trolley wire and existing 1/5～1/10 degree that reduces to of comparing.Therefore, about the loss of trolley wire, arc loss electrical losses such as (arc wear) begins more to come into one's own than in the past mechanical wear, and at electrical loss, the trolley wire that hot properties is good, conductivity water temperature and depth is high is more favourable.Particularly, surging to environmental problem care recently, the power loss of overhead wire also begins to receive publicity, and is that trolley wire is compared with existing Sn, and it is strong that the requirement of the trolley wire that conductivity water temperature and depth is higher becomes.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of manufacture method of trolley wire and the trolley wire that obtains by this manufacture method.This manufacture method can keep the conductivity water temperature and depth of the trolley wire that contains Ag and can access have good pulling strengrth, wear resistance and stable on heating trolley wire.
The present inventor finds, sets cold working rate to such an extent that ratio working modulus in the past is big by main, thereby can make good trolley wire.
The manufacture method of high conductivity high strength electric vehicle overhead line of the present invention comprises following operation: obtain containing Ag0.12～0.3 quality %, contain aerobic 0.01～0.05 quality % and cast material that all the other are made of copper and unavoidable impurities by continuous casting; Above-mentioned cast material is implemented hot working, obtain the wire rod of diameter more than or equal to 25mm more than or equal to 600 ℃ temperature with more than or equal to 80% hot working rate; To be less than or equal to 150 ℃ temperature and above-mentioned wire rod to be implemented cool working, the trolley wire of (1) or (2) below obtaining more than or equal to 70% cold working rate.
(1) nominal area of section of trolley wire is 150～170mm
2The time, pulling strengrth is more than or equal to 400N/mm
2, conductivity water temperature and depth is more than or equal to 97 IACS (%);
(2) nominal area of section of trolley wire is 80～120mm
2The time, pulling strengrth is more than or equal to 420N/mm
2, conductivity water temperature and depth is more than or equal to 97 IACS (%).
According to this method, can improve resistance to effect of heat, keep the conductivity water temperature and depth of Cu-Ag system, and can improve pulling strengrth.
In the present invention, use and to contain Ag0.12～0.3 quality %, contain aerobic 0.01～0.05 quality % and cast material that all the other are made of copper and unavoidable impurities.When the content of Ag during less than 0.12% quality, pulling strengrth is not enough, and when Ag content surpassed 0.30% quality, conductivity water temperature and depth became less than 97IACS (%).In addition, the content of oxygen is easy to generate crackle during less than 0.01 quality % during hot working, and when oxygen surpassed 0.05 quality %, being easy to generate during cool working with the aerugo was the broken string of starting point.
The operation that obtains above-mentioned cast material is preferably taken turns the forging type that band forging type (ホ イ one Le ベ Le ト mode) or biobelt forging type (Star イ Application ベ Le ト mode) etc. use movable mold.Cast continuously in these modes and can suppress manufacturing cost.The continuous casting rolling process is the method for air wire that can stable supplying have the long size of connecting portion.
Then, to resulting cast material implementing hot working more than or equal to 600 ℃ temperature more than or equal to 80%, thereby make cast sturcture's miniaturization, improve wire rod intensity.As hot working hot calender preferably.Particularly, carry out hot calender continuously, have the effect that reduces power consumption, cost-cutting with above-mentioned casting.
The hot processing temperature of cast material is more than or equal to 600 ℃.Thus, carry out hot working easily.Processability when in addition, subsequent handling is cool working also can improve.Cast material is because in the oxidation of when calendering, so be immersed in reduction in the alcohol etc. in the subsequent handling.At this moment, coldization of cast material, reaction is difficult to carry out, and reduction latens, so consider that from this point it is important bringing up to processing temperature more than or equal to 600 ℃ in advance.
Hot worked working modulus is more than or equal to 80%.Thus, can make the crystalline structure miniaturization of wire rod, improve intensity.This working modulus is with (sectional area before (sectional area after the sectional area-processing before the processing)/processing) expression.This hot worked working modulus can be more than or equal to 85%, and then more than or equal to 90%.
In addition, the diameter of the wire rod that obtains of hot working is more than or equal to 25mm.Form this line footpath like this, then can bear the cool working of high working modulus in the subsequent processing.As a result, the effect of cold worked raising wire rod intensity can be more remarkable.
After obtaining the wire rod of diameter, to be less than or equal to 150 ℃ temperature and to implement cool working more than or equal to 70% working modulus more than or equal to 25mm.By this cool working, can improve the intensity of wire rod.Working modulus at this also can be with (sectional area before (sectional area after the sectional area-processing before the processing)/processing) expression.
Cool working is fit to use Wire Drawing.Processing temperature is less than or equal to 150 ℃ and gets final product, and can not need under the normal temperature heats and processes.Working modulus forms more than or equal to 70% effect that can access abundant raising intensity.
Obtain nominal area of section 150～170mm
2Trolley wire the time, this cold working rate more preferably greater than or equal 75%.In addition, obtain nominal area of section 80～120mm
2Trolley wire the time, be preferably greater than or equal 75% working modulus, more preferably greater than or equal 80% working modulus.As long as the sectional area of trolley wire just can access higher working modulus thin.
By above-mentioned cool working, the nominal area of section of trolley wire is 150～170mm
2The time, pulling strengrth is more than or equal to 400N/mm
2Nominal area of section is 80～120mm
2The time, pulling strengrth is more than or equal to 420N/mm
2By obtaining such high strength, can form and the equal pulling strengrth of trolley wire that contains the Sn of 0.3 quality %, realize high wear resistance.In addition, nominal area of section is 80～120mm
2The time, more preferably have more than or equal to 425N/mm
2Pulling strengrth.
And conductivity water temperature and depth forms more than or equal to 97IACS (%).The composition of above-mentioned trolley wire limits the high conductivity that can guarantee to be bordering on fine copper.
And high conductivity high strength electric vehicle overhead line of the present invention contains Ag 0.12～0.3 quality %, oxygen 0.01～0.05 quality %, and all the other then are made of copper and unavoidable impurities.To be less than or equal to 150 ℃ temperature and more than or equal to 70% cold working rate above-mentioned wire rod to be implemented cool working, the nominal area of section of trolley wire is 150～170mm
2The time, pulling strengrth is more than or equal to 400N/mm
2, conductivity water temperature and depth is more than or equal to 97IACS (%).In addition, the nominal area of section of trolley wire is 80～120mm
2The time, pulling strengrth is more than or equal to 420N/mm
2, conductivity water temperature and depth is more than or equal to 97IACS (%).
Trolley wire of the present invention is when nominal area of section is 80～120mm
2The time, preferred tensile strength is more than or equal to 425N/mm
2
Among the present invention, can access and both keep Ag-Cu is the high conductivity that trolley wire has, and not only can access intensity and resistance to effect of heat but also high trolley wire.Therefore, can be manufactured on the at high speed railway is the trolley wire that also can fully be competent under the usage condition of main harshness.In addition, pulling strengrth and 0.3 quality %Sn trolley wire are equal, and conductivity water temperature and depth is the value approximate with fine copper, can realize high strength and high conductivity.
The specific embodiment
The following describes embodiments of the present invention.
Embodiment 1
Use the sample of continuous casting hot rolling manufactured sample sequence number 1～9, use existing method to make the sample of sample sequence number 10～14.They all are with the operation of the fusion → manufacturing → hot calender → wire drawing → product basic Fabrication procedure as trolley wire.
At first, the fusion copper alloy of the chemical constitution shown in the sample sequence number 1～9 of continuous casting table 1.Then, with temperature shown in the table 1 and hot working rate, hot calender obtains wire rod to the diameter shown in the table 1.Then, about resulting wire rod, carry out the size that wire drawing is put down in writing until sectional area one hurdle with the cold worked temperature shown in the table 1, cold working rate.In addition, above-mentioned hot calender and cold worked working modulus are represented by (sectional area before (sectional area after the sectional area-processing before the processing)/processing).
Sample sequence number 10～14th,, the fusion copper alloy of the chemical constitution shown in the continuous casting table 1 then, carries out hot calender until diameter shown in the table 1 with the hot working rate of table 1, obtains wire rod.Wherein, sample sequence number 9 is not carried out hot calender, and obtains the wire rod of diameter 30mm as cast material.
Then, make the trolley wire of required sectional area with the cool working condition shown in the table 1.Measure pulling strengrth, conductivity water temperature and depth, the oxygen content of the trolley wire that obtains like this, be shown in table 1.* number expression comparative example in the table.
At first, comparing dimensions 110mm
2The pulling strengrth of sample sequence number 3,4,6,7,9,11,12.Compare the sample sequence number 6,11,12 that cold working rate is low and do not carry out hot worked sample sequence number 9 and can not obtain enough pulling strengrths with sample sequence number 3,4.The poor sample sequence number 7 of Ag also is that pulling strengrth is low.And being sample sequence number 3,4, example of the present invention all shown high tensile.
Then, to size 150,170mm
2Sample sequence number 1,2,5,8,10,13,14 carry out the comparison of pulling strengrth.Sample sequence number 10,13,14 pulling strengrths that sample sequence number 8, the cold working rate that the hot working rate is low is low are low.And being sample sequence number 1,2,5, example of the present invention can both obtain high tensile.
Then, do not compare relying in the conductivity water temperature and depth of the size of trolley wire.Sample sequence number 6 conductivity water temperature and depth that Ag content is many are low.Because though Ag has the conductivity water temperature and depth higher than copper when existing with metal form, solid solution has Ag in the copper alloy, then the conductivity water temperature and depth of copper alloy has the tendency of decline.In the sample sequence number 13, because the Sn that is solid-solubilized in the copper has the function that reduces electric conductivity, so its conductivity water temperature and depth step-down.
Embodiment 2
The trolley wire that uses embodiment 1 to make carries out loss test with the state near actual operating conditions more, calculates the life-span as trolley wire.In the above-mentioned trolley wire, obtain dimension formula hardness, waste and theoretical life-span with the sample of sample sequence number 3,11,13 and 14.Wherein, the size of sample sequence number 3,11 is 110mm
2, remaining specimen size is 170mm
2
The evaluation of waste is following to be carried out.At first, trolley wire and copper are that the sliding velocity of sintering slide plate is 50km/h, with the contact load of slide plate be 7kgf (68.6N), under the state that has applied 200V vdc, 200A electrical current, make trolley wire and slide plate slides 10
4Inferior.Then, obtain the loss sectional area of trolley wire, its loss sectional area is removed by the slip number of times of pantograph (slide plate), and each loss sectional area of ten thousand times of slip number of times is estimated as waste.The more little expression wear resistance of waste is good more.
The theoretical life-span is that the loss area with trolley wire reaches 43.5mm
2Situation (the sectional area 110mm of trolley wire
2The time residual diameter 7.5mm situation under, this area 170mm
2The time residual diameter 11.1mm situation under) as the life-span, under the condition of above-mentioned waste test,, calculate year number up to this residual diameter with one-year age trolley wire and slide plate slides 100,000 times.
Table 2
Test results is shown in table 2.As a result, its dimension formula hardness of sample sequence number 3 uprise, and waste diminishes, and the theoretical life-span becomes 18.1, increase substantially than remaining life-span.This shows not only conductivity water temperature and depth height of trolley wire of the present invention, and pulling strengrth, wear resistance are good.
In addition, for relatively, also carried out same evaluation about being equivalent to the material that above-mentioned railway always grinds the existing sample that report puts down in writing.Special public clear 59-43332 communique, waste is put down in writing with the unit of " mm/ ten thousand pantographs ", so, it is converted into (mm with budgetary estimate
2/ ten thousand pantographs) unit.This current material, identical with creating conditions of common trolley wire, it is about 65% to make final cold working rate, sectional area 110mm
2It the results are shown in table 3.
Table 3
TPC: tough pitch copper
This table as can be known, (TPC-0.30Ag) contains the Ag of 0.3 quality %, but cold working rate is low for about 65%, pulling strengrth is little.In addition, the waste of comparison sheet 2 and table 3 then as can be known, trolley wire of the present invention has wear resistance equal above with (TPC-0.31Sn) or (TPC-0.35Sn).
Trolley wire of the present invention and the copper cash etc. that has added Sn relatively, conductivity water temperature and depth height, resistance to effect of heat are not inferior.The antifriction characteristic is compared also good with the trolley wire that the copper that has added Sn constitutes.In addition, owing to have high tensile and high conductivity, trolley wire of the present invention not only can also fully use in original circuit as using the trolley wire utilization at a high speed.
Claims (7)
1. the manufacture method of a high conductivity high strength electric vehicle overhead line, it is characterized in that, comprise following operation: obtain containing the Ag of 0.12～0.3% quality, the oxygen of 0.01～0.05% quality by continuous casting, all the other are the cast materiales that are made of copper and unavoidable impurities; Above-mentioned cast material is implemented hot working, obtain the wire rod of diameter more than or equal to 25mm more than or equal to 600 ℃ temperature with more than or equal to 80% hot working rate; To be less than or equal to 150 ℃ temperature and above-mentioned wire rod to be implemented cool working more than or equal to 70% cold working rate, obtain the trolley wire of following (1) or (2),
(1) nominal area of section of trolley wire is 150～170mm
2The time, pulling strengrth is more than or equal to 400N/mm
2, conductivity water temperature and depth is more than or equal to 97IACS%;
(2) nominal area of section of trolley wire is 80～120mm
2The time, pulling strengrth is more than or equal to 420N/mm
2, conductivity water temperature and depth is more than or equal to 97IACS%.
2. the manufacture method of high conductivity high strength electric vehicle overhead line shown in claim 1 is characterized in that cold working rate is more than or equal to 75%.
3. the manufacture method of high conductivity high strength electric vehicle overhead line as claimed in claim 1 is characterized in that, cool working nominal area of section 80～120mm
2Trolley wire the time, cold working rate is more than or equal to 80%.
4. the manufacture method of high conductivity high strength electric vehicle overhead line as claimed in claim 2 is characterized in that, cool working nominal area of section 80～120mm
2Trolley wire the time, cold working rate is more than or equal to 80%.
5. as the manufacture method of each described high conductivity high strength electric vehicle overhead line of claim 1～4, it is characterized in that, is 80～120mm at nominal area of section
2The situation of trolley wire under, pulling strengrth is more than or equal to 425N/mm
2
6. a high conductivity high strength electric vehicle overhead line wherein, contains Ag0.12～0.3 quality %, oxygen 0.01～0.05 quality %, and all the other are made of copper and unavoidable impurities, it is characterized in that,
Being less than or equal to 150 ℃ temperature and above-mentioned wire rod being implemented cool working more than or equal to 70% cold working rate,
The nominal area of section of above-mentioned trolley wire is 150～170mm
2The time, pulling strengrth is more than or equal to 400N/mm
2, conductivity water temperature and depth is more than or equal to 97%;
The nominal area of section of above-mentioned trolley wire is 80～120mm
2The time, pulling strengrth is more than or equal to 420N/mm
2, conductivity water temperature and depth is more than or equal to 97%.
7. high conductivity high strength electric vehicle overhead line as claimed in claim 6 is characterized in that, when nominal area of section is 80～120mm
2The time, pulling strengrth is more than or equal to 425N/mm
2
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004194046A JP3906852B2 (en) | 2004-06-30 | 2004-06-30 | High conductivity high strength trolley wire manufacturing method and high conductivity high strength trolley wire |
| JP194046/04 | 2004-06-30 |
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| Publication Number | Publication Date |
|---|---|
| CN1715097A CN1715097A (en) | 2006-01-04 |
| CN1715097B true CN1715097B (en) | 2010-12-01 |
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| CN 200510082133 Active CN1715097B (en) | 2004-06-30 | 2005-06-29 | High conductivity high strength electric vehicle overhead line and its producing method |
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| JP (1) | JP3906852B2 (en) |
| CN (1) | CN1715097B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5121282B2 (en) * | 2007-04-03 | 2013-01-16 | 株式会社神戸製鋼所 | Steel for high-speed cold working and its manufacturing method, and high-speed cold-worked component and its manufacturing method |
| JP5659845B2 (en) * | 2011-02-18 | 2015-01-28 | 住友電気工業株式会社 | Manufacturing method of high conductivity and high strength trolley wire |
| CN106080269B (en) * | 2016-06-21 | 2018-09-21 | 西南交通大学 | Band return wire direct feeding system tunnel impedance of traction electric network computational methods |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084577A (en) * | 1993-09-06 | 1994-03-30 | 铁道部科学研究院机车车辆研究所 | Copper alloy contact wire |
-
2004
- 2004-06-30 JP JP2004194046A patent/JP3906852B2/en not_active Expired - Lifetime
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- 2005-06-29 CN CN 200510082133 patent/CN1715097B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084577A (en) * | 1993-09-06 | 1994-03-30 | 铁道部科学研究院机车车辆研究所 | Copper alloy contact wire |
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| Publication number | Publication date |
|---|---|
| JP3906852B2 (en) | 2007-04-18 |
| CN1715097A (en) | 2006-01-04 |
| JP2006016650A (en) | 2006-01-19 |
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