CN101818283B - Copper alloy conducting bar and end ring for high-power frequency-adjustable speed-adjustable asynchronous traction motor and preparation method thereof - Google Patents
Copper alloy conducting bar and end ring for high-power frequency-adjustable speed-adjustable asynchronous traction motor and preparation method thereof Download PDFInfo
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- CN101818283B CN101818283B CN2010101815092A CN201010181509A CN101818283B CN 101818283 B CN101818283 B CN 101818283B CN 2010101815092 A CN2010101815092 A CN 2010101815092A CN 201010181509 A CN201010181509 A CN 201010181509A CN 101818283 B CN101818283 B CN 101818283B
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Abstract
The invention relates to a copper alloy conducting bar and an end ring for a high-power frequency-adjustable speed-adjustable asynchronous traction motor and preparation methods thereof. The conducting bar is prepared by the processes of medium-frequency induction melting, semi-continuous casting, ingot homogenization, hot extrusion, online quenching, cold drawing, aging and machining; and the end ring is prepared by the processes of medium-frequency induction melting, semi-continuous casting, ingot homogenization, forging, solid solution hardening, cold heading, aging and machining. The alloy of the conducting bar for a traction motor of a rapid train comprises the following components in percentage by weight: 9 to 12 percent of Zn, 0.3 to 1 percent of Cr, 0.05 to 0.3 percent of Zr and the balance of copper and inevitable impurities, wherein the resistance Rho at 150 DEG C of the alloy is kept at (5.00+/-0.05)*10<-6>ohm.cm, and at a test temperature of 350 DEG C, sb is more than or equal to 320MPa, s0.2 is more than or equal to 270 and d5 is more than or equal to 10 percent; the alloy of the conducting bar for the traction motors of subway and light rail trains comprises the following components: 0.5 to 3 percent of Zn, 0.3 to 1 percent of Cr, 0.05 to 0.3 percent of Zr and the balance of copper and inevitable impurities, wherein the resistance Rho at 150 DEG C of the alloy is kept at(3.45+/-0.05)*10<-6>ohm.cm, and at a test temperature of 350 DEG C, sb is more than or equal to 290MPa, S0.2 is more than or equal to 240MPa, and d5 is more than or equal to 12 percent; the copper alloy of the end ring for the traction motor comprises the following components: 0.3 to 1 percent of Cr, 0.05 to 0.3 percent of Zr and the balance of copper and inevitable impurities, wherein the resistance Rho at 150 DEG C of the copper alloy is kept at (2.70+/-0.05)*10<-6>ohm.cm, and at a test temperature of 350 DEG C, sb is more than or equal to 260MPa, s0.2 is more than or equal to 220MPa.
Description
Technical field
The present invention relates to bullet train, subway train, light rail train preparing technical field with needed sliver of high-power frequency-adjustable speed-adjustable asynchronous traction motor rotor part and end ring.
Background technology
1999, the contriver has declared one " high-power asynchronous traction motor of high-speed train sliver and retaining ring " on the successful basis of Ministry of Railways's State Key Task 95 project research patent of invention, duly authorized (ZL99101984.9) in 2003.Over 10 years, China's track traffic cause develop rapidly, the overall trip speed of bullet train is developed into more than the present 350km/h by the 200km/h of design at that time, bullet train, subway train and light rail train have been gone to recreation with high-power asynchronous traction motor from introduction-digestion, and the power asynchronous traction motor of high of development has been provided on homemade bullet train, subway train and the light rail train.Through comparative study over 10 years and exploitation, traction motor design department is according to bullet train, subway train, the different operation condition of light rail train, and the special-purpose Cu-alloy conducting bars of different purposes high-power frequency-adjustable speed-adjustable asynchronous traction motor rotors and end ring are put into different categories have been proposed actual and requirement more specifically.Therefore, the patent of declaring in 1999 described " high-power asynchronous traction motor of high-speed train sliver and retaining ring " still can satisfy the requirement of novel traction motor except that retaining ring, the T2 fine copper end ring design requirements of incompatibility novel traction motor that sliver and original traction electric machine rotor are used is necessary former patent is made amendment and replenished.The present invention cooperates traction motor design department and motor manufacturers to carry out tackling key problem research, has obtained satisfied result of use, declares " high-power frequency-adjustable speed-adjustable asynchronous traction motor rotor Cu-alloy conducting bar and end ring assembly " patent of invention on this basis.
Summary of the invention
The present invention is directed to bullet train, subway train, light rail train with the different requirements of high-power frequency-adjustable speed-adjustable asynchronous traction motor design to rotor copper alloy sliver and end ring performance, put into different categories to traction electric machine rotor copper alloy sliver and end ring alloy material composition, preparation technology adjusts and improve, and obtains the sliver of new composition.Meanwhile, also invented a kind of rotor and replaced original T 2 fine copper end ring, so that the easier regulation and control of the electrical property of copper alloy cage rotor with the copper alloy end ring.
The preparation method of above-mentioned sliver and end ring also is provided in addition.
Technical scheme of the present invention is as follows: 1. the design of traction electric machine rotor copper alloy sliver and end ring composition makes bullet train is 9-12%Zn with the weight percent of the alloy ingredient of high-power frequency-adjustable speed-adjustable asynchronous traction motor rotor copper alloy sliver, 0.3-1%Cr, 0.05-0.3%Zr, surplus is copper and unavoidable impurities.
2. make subway, light rail train is 0.3-3%Zn with the weight percent of the alloy ingredient of high-power frequency-adjustable speed-adjustable asynchronous traction motor rotor copper alloy sliver, 0.3-1%Cr, 0.05-0.3%Zr, surplus is copper and unavoidable impurities; 3. the weight percent of making the copper alloy composition of end ring is 0.3-1%Cr, 0.05-0.3%Zr, and surplus is copper and unavoidable impurities.
Above-mentioned traction electric machine rotor copper alloy sliver and end ring manufacturing process are as follows: batching-Medium frequency induction melting-semicontinuous casting-ingot homogenization-hot extrusion-press quenching-cold drawn-alignment-shearing-timeliness-machining.
In the sliver copper alloy, zinc mainly plays a part to adjust the resistance alloys rate, and to satisfy the needs of traction electric machine frequency-adjustable speed-adjustable, zinc also has tangible solid solution strengthening effect in copper alloy in addition, helps improving the hot strength of sliver copper alloy.Trace chromium in the sliver copper alloy and zirconium are in the processing heat treatment process particularly in the aging precipitation process, to on dislocation substructure, precipitate with the form of nanometer particle, can significantly improve the anti-softening temperature of alloy, guarantee structural stability and the security of traction motor under 350 ℃ of critical working temperatures.The process implementing aspect is in order to make the electricalresistivity of Cu-alloy conducting bar
150 ℃Can stably be controlled in the specified limit of error, adding temperature and the addition manner of lay special stress on zinc of the present invention in melt, after treating that copper melts fully, having a power failure to cool to about 1150 ℃ joins zinc ingot metal in the copper melts again, the volatilization loss that can reduce zinc like this with the content that guarantees zinc be controlled at ± 0.3% (mass percent) scope in.In alloy, bring into play the effect of aging precipitation in order to make trace chromium and zirconium, at first to make chromium and zirconium fully be dissolved in the copper melts, chromium wraps up with thin copper foil with the particle less than 5mm, be pushed down in the copper melts at 1250 ℃, zirconium then is that the Cu-10Zr master alloy filament form about 6mm is inserted in the copper melts on crystallizer top with the diameter.The addition manner of this uniqueness has significantly reduced the oxidation of chromium metal and zirconium, makes the recovery rate of chromium and zirconium reach 95% and 90% respectively.In addition, be also noted that the on-line solution temperature of Cu-alloy conducting bar must not be lower than 890 ℃, separate out (Fig. 1) with nanometer particle with chromium and zirconium in the ag(e)ing process after the assurance solid solution.Aging temp is 450 ℃ ± 5 ℃, and aging time is 4-6 hour.
Above-mentioned high-power frequency-adjustable speed-adjustable asynchronous traction motor rotor end ring is pressed following prepared: batching-Medium frequency induction melting-semicontinuous casting-ingot homogenization-forge hot-reinforcement solid solution-cold-heading-timeliness-machining.
Effect and their effects in the sliver copper alloy in the end ring copper alloy of chromium and zirconium is similar, and chromium and zirconium chromium in the copper alloy end ring quenches the back ag(e)ing process has then been separated out precipitation strength and improved the effect of high temperature resistance remollescent with the form of fine copper zirconium compounds with superfine chromium particle, zirconium.Should be understood that, different with the extruding-press quenching technology in the Cu-alloy conducting bar preparation process, do not have extruding-on-line solution-quenching in the copper alloy end ring preparation process and have only forge hot-solid solution-quenching, therefore process the dislocation substructure that forms in the heat treatment process relatively a little less than, must increase by two measures, take to strengthen solution treatment on the one hand, promptly, allow as much as possible being dissolved into of trace chromium and zirconium separate out nanometer particle as much as possible in the sosoloid after the timeliness guaranteeing as far as possible solid solution temperature to be brought up to 970 ℃ ± 10 ℃ under the excessive not thick prerequisite of alloy grain; After end ring is strengthened solid solution on the other hand, increase by one cold-heading distortion before the ageing treatment, strengthen the intensity that improves end ring by thermomechanical treatment, aging temp is 450 ℃ ± 5 ℃, aging time is 4-6 hour.
The sliver of manufacturing of the present invention and end ring have following advantage: the contriver explores by a large amount of tests, optimize suitable alloying element ratio, and to the improvement of temperature in the course of processing and addition manner, three's combination makes sliver of the present invention and end ring have excellent performance.
For bullet train traction electric machine rotor Cu-alloy conducting bar, by content and the online quenching technology of adjustment that reduces zinc, the electricalresistivity of alloy
150 ℃Drop to (5.00 ± 0.05) * 10
-6Ω .cm, except that the hot workability and the remarkable improvement of cold-forming property of sliver, the electricity regulation and control performance of motor also improves, and the hot strength of 350 ℃ of critical working temperatures still remains on the high level of 350Mpa.
For subway, light rail train traction electric machine rotor Cu-alloy conducting bar, by the content and the online quenching technology of adjustment of suitable increase zinc, the electricalresistivity of alloy
150 ℃Still be stabilized in (3.45 ± 0.05) * 10
-6Ω .cm, and the hot strength of 350 ℃ of critical working temperatures has been brought up to 290MPa.
For the end ring copper alloy, the electricalresistivity of alloy
150 ℃Be (2.7 ± 0.05) * 10
-6Ω .cm, with respect to T2 fine copper end ring, the resistivity difference of copper alloy end ring and Cu-alloy conducting bar reduces, the result makes the conductivity of copper alloy cage rotor be more prone to the automatically controlled cooperation with whole motor, and 350 ℃ of critical working temperature hot strengths also are significantly higher than the T2 fine copper end ring that in advance uses.
Cu-alloy conducting bar of the present invention and end ring successfully have been used for making homemade bullet train, subway train, light rail train and the high-power frequency-adjustable speed-adjustable asynchronous traction motor of main line train EMUs.
Description of drawings
Fig. 1 is the microstructure of traction electric machine rotor copper alloy sliver.
A) dislocation substructure that forms in the thermomechanical treatment process, the nanometer particle that contains chromium and zirconium that b) forms in the ag(e)ing process.
Embodiment
Further specify the present invention below in conjunction with embodiment, rather than restriction the present invention.
Embodiment 1 bullet train traction electric machine rotor Cu-alloy conducting bar Cu-alloy conducting bar composition (mass percent): zinc 10.0%, chromium 0.5%, zirconium 0.1%, Yu Weitong, batching-Medium frequency induction melting-semicontinuous casting-ingot homogenization-hot extrusion-890 ℃ press quenching-cold drawn-alignment-shearing-450 ℃/5h timeliness, after treating that copper melts fully, cool to 1150 ℃ and again zinc ingot metal is joined in the copper melts; Chromium wraps up with thin copper foil with the particle less than 5mm, is pushed down in the copper melts at 1250 ℃, and zirconium then is that the Cu-10Zr master alloy filament form about 6mm is inserted in the copper melts on crystallizer top with the diameter.The salient features of the sliver of preparation sees Table 1.Cu-alloy conducting bar of the present invention has been used for homemade 350km/h bullet train with high-power frequency-adjustable speed-adjustable asynchronous traction motor rotor bar.The result shows, by content and the online quenching technology of adjustment that reduces zinc, the electricalresistivity of alloy
150 ℃Drop to (5.02 ± 0.05) * 10
-6Ω .cm, except that the hot workability of sliver and cold-forming property significantly improved, the electricity regulation and control performance of motor also improved, and the hot strength of 350 ℃ of critical working temperatures still remains on 〉=high level of 320Mpa.Former invention refers to ZL99101984.9.The performance of (down together) table 1 Cu-alloy conducting bar of the present invention and former invention relatively
Embodiment 2 subways, light rail train traction electric machine rotor Cu-alloy conducting bar copper alloy composition (mass percent): zinc 2.5%, chromium 0.5%, zirconium 0.1%, Yu Weitong, batching-Medium frequency induction melting-semicontinuous casting-ingot homogenization-hot extrusion-900 ℃ press quenching-cold drawn-alignment-shearing-450 ℃/5h timeliness, after treating that copper melts fully, cool to 1150 ℃ and again zinc ingot metal is joined in the copper melts; Chromium wraps up with thin copper foil with the particle less than 5mm, is pushed down in the copper melts at 1250 ℃, and zirconium then is inserted in the copper melts on crystallizer top with the form of Cu-10Zr master alloy filament.The salient features of the sliver of preparation sees Table 2, and Cu-alloy conducting bar of the present invention has been used for homemade subway train, the light rail train high-power frequency-adjustable speed-adjustable asynchronous traction motor rotor bar of 300kw.The result shows, by the content and the online quenching technology of adjustment of suitable increase zinc, the electricalresistivity of alloy
150 ℃Still be stabilized in (3.45 ± 0.05) * 10
-6Ω .cm, and the hot strength of 350 ℃ of critical working temperatures has been brought up to 290MPa.
The performance of table 2 Cu-alloy conducting bar of the present invention and former invention relatively
Embodiment 3 traction electric machine rotors copper alloy end ring copper alloy composition (mass percent): chromium 0.5%, zirconium 0.1%, Yu Weitong, solid solution-cold-heading-450 ℃/5h timeliness is strengthened in batching-Medium frequency induction melting-semicontinuous casting-ingot homogenization-forging-970 ℃, and the copper alloy end ring salient features of preparation sees Table 3.Copper alloy end ring of the present invention has been used for homemade bullet train, main line train EMUs, subway train, light rail train with high-power frequency-adjustable speed-adjustable asynchronous traction motor rotor end ring.The result shows, with respect to T2 fine copper end ring, the resistivity difference of copper alloy end ring and Cu-alloy conducting bar reduces, the result makes the conductivity of copper alloy cage rotor be more prone to the automatically controlled cooperation with whole motor, and 350 ℃ of critical working temperature hot strengths also are significantly higher than the T2 fine copper end ring that in advance uses.
The performance of table 3 copper alloy end ring of the present invention and T2 copper end ring relatively
Claims (3)
1. the preparation method of a high-power frequency-adjustable speed-adjustable asynchronous traction motor usefulness Cu-alloy conducting bar is characterized in that, comprises Medium frequency induction melting-semicontinuous casting-ingot homogenization-hot extrude-press quenching-cold drawn-alignment-shearing-timeliness-machining; After treating that copper melts fully during described Medium frequency induction melting, cool to 1150 ℃ and again zinc ingot metal is joined in the copper melts; Chromium wraps up with thin copper foil with the particle that is not more than 5mm during described Medium frequency induction melting, is pushed down in the copper melts at 1250 ℃, and zirconium is inserted in the copper melts on crystallizer top with the form of Cu-10Zr master alloy filament; Described press quenching temperature is not less than 890 ℃; Described sliver alloy ingredient weight percent is 9-12%Zn, 0.3-1%Cr, and 0.05-0.3%Zr, surplus is copper and unavoidable impurities or is 0.5-3%Zn, 0.3-1%Cr, 0.05-0.3%Zr, surplus is copper and unavoidable impurities.
2. high-power frequency-adjustable speed-adjustable asynchronous traction motor according to claim 1 is characterized in that with the preparation method of Cu-alloy conducting bar described aging temp is 445 ℃-455 ℃, and aging time is 4-6 hour.
3. high-power frequency-adjustable speed-adjustable asynchronous traction motor according to claim 1 is characterized in that with the preparation method of Cu-alloy conducting bar the diameter of described Cu-10Zr master alloy filament is 6mm.
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| CN105112715B (en) * | 2015-09-08 | 2017-10-20 | 长沙中工新材料有限公司 | The method that CuZnNiSi alloys and preparation method thereof and the alloy prepare band |
| CN106521232B (en) * | 2016-11-22 | 2018-05-18 | 陕西斯瑞新材料股份有限公司 | It is a kind of it is high-strength, in lead Novel copper alloy Cu-Zn-Cr-RE conducting bars and preparation method |
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| CN106676345B (en) * | 2016-12-29 | 2019-01-18 | 安徽科蓝特铝业有限公司 | A kind of ultrahigh-strength aluminum alloy profile |
| FI20195312A1 (en) * | 2019-04-17 | 2020-10-18 | The Switch Drive Systems Oy | A rotor of an induction machine and a method for assembling a cage winding of the rotor |
| CN110408812B (en) * | 2019-07-11 | 2021-03-12 | 陕西斯瑞新材料股份有限公司 | Preparation method for squirrel-cage asynchronous traction motor end ring |
| CN113981258A (en) * | 2021-10-26 | 2022-01-28 | 江阴电工合金股份有限公司 | Production process of copper-chromium-zirconium rod material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1270434A (en) * | 1999-04-09 | 2000-10-18 | 中南工业大学 | Cu-alloy conducting bar and protecting ring for high-power asynchronous traction motor of high-speed train |
| CN1598021A (en) * | 2003-07-09 | 2005-03-23 | 日矿金属加工株式会社 | High strength high conductive copper alloy with good extensibility |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1270434A (en) * | 1999-04-09 | 2000-10-18 | 中南工业大学 | Cu-alloy conducting bar and protecting ring for high-power asynchronous traction motor of high-speed train |
| CN1598021A (en) * | 2003-07-09 | 2005-03-23 | 日矿金属加工株式会社 | High strength high conductive copper alloy with good extensibility |
Non-Patent Citations (1)
| Title |
|---|
| 宋练鹏.轨道交通用牵引电动机转子铜合金部件制备及其相关基础研究.《中南大学博士学位论文》.2010,第30-64页. * |
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