CN100362596C - High-strength high-conductivity copper alloy contact wire for rapid transit railway - Google Patents
High-strength high-conductivity copper alloy contact wire for rapid transit railway Download PDFInfo
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- CN100362596C CN100362596C CNB2005101245897A CN200510124589A CN100362596C CN 100362596 C CN100362596 C CN 100362596C CN B2005101245897 A CNB2005101245897 A CN B2005101245897A CN 200510124589 A CN200510124589 A CN 200510124589A CN 100362596 C CN100362596 C CN 100362596C
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- 229910000881 Cu alloy Inorganic materials 0.000 title claims abstract description 23
- 239000000956 alloy Substances 0.000 claims abstract description 50
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 44
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910052802 copper Inorganic materials 0.000 claims abstract description 39
- 239000010949 copper Substances 0.000 claims abstract description 39
- 238000005266 casting Methods 0.000 claims abstract description 37
- 238000012545 processing Methods 0.000 claims abstract description 23
- 239000011651 chromium Substances 0.000 claims abstract description 18
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 17
- 238000002360 preparation method Methods 0.000 claims abstract description 16
- 230000032683 aging Effects 0.000 claims abstract description 15
- 238000005098 hot rolling Methods 0.000 claims abstract description 15
- 229910052709 silver Inorganic materials 0.000 claims abstract description 15
- 239000004332 silver Substances 0.000 claims abstract description 15
- 238000005096 rolling process Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims description 30
- 230000008018 melting Effects 0.000 claims description 30
- 239000011159 matrix material Substances 0.000 claims description 22
- 238000007670 refining Methods 0.000 claims description 22
- 238000003723 Smelting Methods 0.000 claims description 20
- 238000009749 continuous casting Methods 0.000 claims description 20
- 238000005097 cold rolling Methods 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 8
- 238000010622 cold drawing Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 2
- 238000005516 engineering process Methods 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000470 constituent Substances 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000003483 aging Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 14
- 239000000203 mixture Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 8
- 239000002131 composite material Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 5
- 238000005728 strengthening Methods 0.000 description 5
- 238000005275 alloying Methods 0.000 description 4
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- OWXLRKWPEIAGAT-UHFFFAOYSA-N [Mg].[Cu] Chemical compound [Mg].[Cu] OWXLRKWPEIAGAT-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910017818 Cu—Mg Inorganic materials 0.000 description 1
- 206010054949 Metaplasia Diseases 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000015689 metaplastic ossification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
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Abstract
The present invention discloses a high-strength high-conductivity copper alloy contact wire for a high speed railway and preparation methods thereof. The constituents of the contact wire take copper as a base, and silver of which the total weight percent is 0 to 0.15% and chromium of which the total weight percent is 0.20% to 0.72% are added in the copper. After the preparation method respectively realizes the production of large-length wire stock of the alloy through the hot rolling technique of heavy-section copper alloy and horizontal connection technique. After solution treatment is carried out to a bar stock, and the process of rolling, ageing and rolling only needs to be directly carried out. The two preparation methods have respective characteristics, the first preparation method can obtain uniform and dense casting blanks, and the obtained contact wire grain structures are small and uniform, and have not defects; the second preparation method can save energy consumption and raw materials, the obtained casting blank and the contact wire both have good microscopic structure and macroscopic performance, and high strength and conductivity can be both simultaneously ensured through the processing technology within the given constituent range.
Description
Technical field
The present invention relates to the non-ferrous metals casting processing technique field, particularly high-speed railway strength high-conductivity copper alloy contact wire for rapid and preparation method thereof.
Background technology
Along with the railway operation task increase the weight of and competition is growing more intense, Heavy-Haul Railwayization, high speed (more than the 300Km/h) have become the development trend of world's railway systems, the railway contact wire is one of critical equipment of wheel-track type railway high speedization.Used fine copper and Kufil contact wire intensity only is 350-400MPa at present, only is suitable for middle low speed (250Km/h is following) railway, is difficult to satisfy the service condition of high-speed railway.
The contact wire that the low speed railway is used in the domestic and international existing confession generally adopts continuous up-casting, cooperates cold-work strengthening, makes its intensity can reach the requirement of railway operation.Material composition is mainly based on fine copper, Kufil, signal bronze and copper magnesium alloy etc.This process is simply efficient, but that its fatal weakness is a material structure is not fine and close, and defective is a lot, in the drawing process metaplasia not thorough, core structure crystal grain is thicker; And updraft continuous casting process is used for producing simple alloy mostly, and for complex alloys, continuous up-casting is difficult to carry out.But along with the railway high speed operation, simple cold-work strengthening can't be satisfied its requirement.
The conductor material that can satisfy the requirement of high-speed railway contact wire in the world at present seldom, the Re330 type copper magnesium alloy contact wire of German federal joint-stock company (DBAG) is comparatively advanced, tensile strength reaches 503MPa, conductivity is 68.1%, softening temperature is 385 ℃.The domestic contact wire material of introducing Germany also is the Cu-Mg alloy, and its intensity and conductance are also approaching with above-mentioned numerical value, and these parameters are not very too high for high-speed railway.The present high-speed railway lead of China does not form system as yet, and it is very urgent to research and develop the high-speed railway contact wire with independent intellectual property rights.
The high-speed railway contact wire requires material to have high intensity and electric conductivity simultaneously, must could realize by special composition design and process technology.Strengthen the copper matrix by means such as solution strengthening, precipitation strength, refined crystalline strengthening and working hardenings, technology is ripe, and technology is simpler; cost is lower; suitability for scale production, but the gained strength of materials generally is lower than 550MPa, and conductivity generally is difficult to surpass 75%IACS.Artificial compound and spontaneous composite algorithm is another kind of important intensifying method.Artificial composite material is by the particle of artificial adding second phase, whisker, fibre strengthening copper matrix or relies on the intensity of hardening constituent own to increase copper product intensity (powder metallurgy and plastic deformation method).The in-situ composite method is to add alloying element in copper, by the super large deformation technique, generates wild phase in the inner original position of copper alloy, constitutes fibrous composite with matrix copper, and strengthens body and matrix copper just exists with two kinds of material forms before processing.The copper alloy tensile strength of composite algorithm preparation can reach more than the 2000MPa, but exist the control of complex process, difficult quality, production cost is too high, be difficult to industrialization, and can't be used to produce length (1500m) contact wire that can be fit to the requirement of electric railway contact wire, be unfavorable for suitability for industrialized production.
The core technology of alloyage process is by adding certain alloying element in the copper matrix, to form solid solution or supersaturated solid solution, make generation distortion of lattice of copper matrix or timeliness precipitation strength phase, obtaining the copper alloy that high strength and high conduction performance have both.The copper material intensity σ that makes with alloying
bBetween 350～650MPa, conductivity can just need to cooperate other technology but will make the two have higher level simultaneously up to 60-90%IACS.
Summary of the invention
The object of the present invention is to provide a kind of high-speed railway strength high-conductivity copper alloy contact wire for rapid and preparation method thereof, the obtained contact wire packing height that gets, defectives such as pore-free, segregation, crackle, problems such as the tissue looseness, the crystal grain that exist in the prior art is inhomogeneous have been solved, greatly improved intensity, resistance to wear, corrosion resistance and the thermal stability of contact wire, and kept in touch line and have higher conductivity and toughness and thermal stability; Preparation method of the present invention has realized the heavy in section strand hot rolling technology and the horizontal continuous casting technology of contact wire, has realized containing the atmosphere melting and the continuous casting of Cr alloying element.Technology is simple relatively, the production efficiency height, and cost is lower.
Technical scheme of the present invention can realize according to one of following two kinds of schemes:
A kind of high-speed railway strength high-conductivity copper alloy contact wire for rapid is a matrix with copper, is the silver of 0-0.15% and the chromium of 0.20%-0.72% to the percentage that wherein adds total weight.
A kind of high-speed railway strength high-conductivity copper alloy contact wire for rapid preparation method, concrete steps are as follows:
1) with copper be matrix,, these raw materials put into smelting furnace to wherein adding silver and the 0.20-0.72% chromium that total weight percent is 0-0.15%, the atmosphere melting, smelting temperature is 1250 ℃-1350 ℃, melting 1-2 hour;
2) alloy is removed the gred;
3) alloy after the slagging-off is carried out semi-continuous casting, casting temperature is 1100 ℃-1250 ℃, obtains the ingot casting of φ 180-260mm, prepares hot rolling;
4) copper alloy casting ingot that the last step was obtained carries out hot rolling, 850 ℃-950 ℃ of start rolling temperatures, and finishing temperature is 450 ℃-550 ℃, 10-15 passage hot rolling deformation, finally obtaining diameter is the excellent base of φ 30-45mm;
5) solution treatment is put into solid smelting furnace with the excellent base after the hot rolling, 980 ± 50 ℃ of temperature, and time 30-100min quenches after the insulation;
6) cold rolling, the cold deformation processing of deflection 35-50%;
7) Ageing Treatment, temperature 430-500 ℃, insulation 1.5-3h;
8) cold rolling, the cold deformation of deflection 30-50% is processed, and obtains the round bar base of φ 16-18mm;
9) cold drawing moulding according to the contact wire sectional dimension, through the pass drawing of 3-6 passage, gets the type strength high-conductivity copper alloy contact wire for rapid.
A kind of high-speed railway strength high-conductivity copper alloy contact wire for rapid preparation method, concrete steps are as follows:
1) with copper be matrix,, these raw materials put into smelting furnace to wherein adding silver and the 0.20%-0.72% chromium that total weight percent is 0-0.15%, the atmosphere melting, smelting temperature is 1250 ℃-1350 ℃, melting 1-2 hour;
2) alloy is carried out refining slagging-off, after refining is finished liquid alloy changed over to the continuous casting holding furnace;
3) beginning horizontal continuous-casting throwing, casting speed is at 270-360mm/min, and casting temperature is 1100 ℃-1250 ℃, obtains the strand of φ 30-45mm;
4) solution treatment is put into solid smelting furnace with strand, 980 ± 50 ℃ of temperature, and time 30-100min quenches after the insulation;
5) cold rolling, the cold deformation processing of deflection 35-50%;
6) Ageing Treatment, temperature 430-500 ℃, insulation 1.5-3h;
7) cold rolling, the cold deformation of deflection 30-50% is processed, and obtains the round bar base of φ 16-18mm;
8) cold drawing moulding, according to the contact wire sectional dimension, the pass drawing through the 3-6 passage obtains strength high-conductivity copper alloy contact wire for rapid.
Use the high-speed railway copper alloy contact wire that the present invention produced, have intensity and reach 570-650MPa, conductivity is greater than 76%IACS, and excellent thermal stability and corrosion-proof wear performance, and elongation is not less than combination property such as 5%, and conductor length is greater than 1500 meters.
The present invention relates to the atmosphere melting of this alloy and the preparation technology of contact wire, the production that has realized such alloy length wire rod respectively by the hot rolling technology and the horizontal continuous casting technology of heavy in section copper alloy.The rod base only need directly be rolled-timeliness-the rolling mill practice process after solution treatment.Two kinds of preparation methods respectively have characteristics, and first kind can obtain even, closely knit strand, and gained contact wire grain structure is tiny evenly, zero defect; Can save energy consumption and raw material for second kind, gained strand and contact wire all have good microstructure and macro property.In the composition range of being given, all can guarantee high intensity and conductivity simultaneously by above-mentioned processing technology.
Specific embodiment
Below in conjunction with embodiment content of the present invention is described in further detail:
Embodiment one:
With copper is matrix, and the composition that adds in copper is 0.09% silver, 0.32% chromium by the percentage of total weight, carries out the atmosphere melting, and its smelting temperature is 1290 ℃, and melting 1 hour removes the gred to alloy then;
Alloy after the slagging-off is carried out semi-continuous casting obtain φ 225mm strand, 1240 ℃ of casting temperatures, finishing back strand obtains φ 32.8mm rod base through 12 passage hot rollings, and start rolling temperature is 910 ℃, and finishing temperature is 480 ℃;
Alloy is through solution treatment, and 960 ℃ of temperature are behind the time 90min.Cold rolling plastic deformation 30-50%;
After 1.5 hours, carry out the cold deformation processing of 30-50% 480 ℃ of temperature Ageing Treatment again, obtain the round bar base about φ 16-18mm,,, obtain the two ditch railway contacts wire of finished product through the pass drawing of 3-6 passage according to different contact wire sectional dimension requirements.The intensity of this contact wire product can reach 570-625Mpa, elongation 6.5-7.3%, and conductivity is 82%IACS simultaneously.
Embodiment two:
With copper is matrix, and the composition that adds in copper is 0.1% silver, 0.20% chromium by the percentage of total weight, carries out the atmosphere melting, and its smelting temperature is 1310 ℃, and melting 1.5 hours is carried out the refining slagging-off to alloy then;
Alloy after the refining slagging-off is carried out semi-continuous casting obtain φ 205mm strand, 1230 ℃ of casting temperatures, finishing back strand obtains φ 34mm rod base through 10 passage hot rollings, and start rolling temperature is 920 ℃, and finishing temperature is 510 ℃;
The alloy bar base is through solution treatment, 980 ℃ of temperature, and behind the time 60min, cold rolling plastic deformation 30-50%;
After 2.0 hours, carry out the cold deformation processing of 30-50% 480 ℃ of temperature Ageing Treatment again, obtain the round bar base about φ 16-18mm,,, obtain the two ditch railway contacts wire of finished product through the pass drawing of 3-6 passage according to different contact wire sectional dimension requirements.The intensity of this contact wire product can reach 570-620 MPa.Elongation 5.5-6.5%, conductivity is 84.5%IACS simultaneously.
Embodiment three:
With copper is matrix, and the composition that adds in copper is that 0.07% silver, 0.43% chromium carry out the atmosphere melting by the percentage of total weight, and its smelting temperature is 1285 ℃, and melting 1.5 hours is carried out the refining slagging-off to alloy then;
Alloy after the refining slagging-off is carried out semi-continuous casting obtain φ 260mm strand, 1250 ℃ of casting temperatures, finishing back strand obtains φ 34mm rod base through 12 passage hot rollings, and start rolling temperature is 940 ℃, and finishing temperature is 530 ℃;
Alloy is through solution treatment, 980 ℃ of temperature, plastic deformation 30-55% behind the time 90min;
470 ℃ of Ageing Treatment plastic deformation 30-55% again after 2.5 hours.Obtain the round bar base about φ 16-18mm,,, obtain the two ditch railway contacts wire of finished product through the pass drawing of 3-6 passage according to different contact wire sectional dimension requirements.Through above-mentioned processing, the intensity of this contact wire product can reach 580-615MPa.Elongation 5.5-7.5%,, conductivity is 81%IACS simultaneously.
Embodiment four:
With copper is matrix, and the composition that adds in copper is 0.72% chromium by the percentage of total weight, carries out the atmosphere melting, then alloy is carried out the refining slagging-off; Smelting temperature is 1280 ℃, melting 2 hours; Alloy after the refining slagging-off is carried out semi-continuous casting obtain φ 260mm strand, 1250 ℃ of casting temperatures, finishing back strand obtains φ 34mm rod base through 12 passage hot rollings, and start rolling temperature is 940 ℃, and finishing temperature is 530 ℃.
Alloy is through solution treatment, and 990 ℃, plastic deformation 45-55% behind the 60min;
After 1.5 hours, carry out the cold deformation processing of 35-45% 480 ℃ of temperature Ageing Treatment again, obtain the round bar base about φ 16-18mm,,, obtain the two ditch railway contacts wire of finished product through the pass drawing of 3-6 passage according to different contact wire sectional dimension requirements.Through above-mentioned processing, the intensity of this contact wire product reaches 580-650MPa.Elongation 5.3-6.7%, conductivity is 77%IACS simultaneously.
Embodiment five:
With copper is matrix, and the composition that adds in copper is 0.09% silver, 0.52% chromium by the percentage of total weight, carries out the atmosphere melting, and smelting temperature is 1300 ℃, and melting 1 hour is carried out the refining slagging-off to alloy then.Alloy after the refining slagging-off is carried out horizontal casting, 1250 ℃ of casting temperatures, Blank drawing machine adopts and draws-push away-stop-and the billet withdrawing technology curve of La carries out throwing, and casting speed remains on 280mm/min;
Alloy material obtains φ 34mm strand through horizontal continuous-casting, and alloy is through solution treatment, 980 ℃ of temperature, plastic deformation 35-50% behind the time 90min;
After 3.0 hours, carry out the cold deformation processing of 30-50% 450 ℃ of temperature Ageing Treatment again, obtain the round bar base about φ 16-18mm,,, obtain the two ditch railway contacts wire of finished product through the pass drawing of 3-6 passage according to different contact wire sectional dimension requirements.The intensity of this contact wire product can reach 575-630MPa.Elongation 5.3-6.5%, conductivity is 79.5%IACS simultaneously.
Embodiment six:
With copper is matrix, and the composition that adds in copper is 0.15% silver, 0.55% chromium by the percentage of total weight; Then alloy is carried out the refining slagging-off, carry out the atmosphere melting, melting 2 hours, smelting temperature is 1310 ℃; Alloy after the refining slagging-off is carried out horizontal casting, 1210 ℃ of casting temperatures, Blank drawing machine adopts and draws-push away-stop-and the billet withdrawing technology curve of La carries out throwing, casting speed remains on 360mm/min, adopts suitable cooling water pressure simultaneously, secondary cooling distance, stop/Lapie frequency of billet withdrawal etc.;
Alloy material obtains φ 30mm strand through horizontal continuous-casting, alloy through solution treatment (980 ℃, 100min) back plastic deformation 35-45%;
After 2.0 hours, carry out the cold deformation processing of 30-55% 480 ℃ of temperature Ageing Treatment again, obtain the round bar base about φ 16-18mm,,, obtain the two ditch railway contacts wire of finished product through the pass drawing of 3-6 passage according to different contact wire sectional dimension requirements.The intensity of this contact wire product can reach 590-640 MPa.Elongation 5.3-7.5%, conductivity is 79%IACS simultaneously.
Embodiment seven:
With copper is matrix, and the composition that adds in copper is 0.72% chromium by the percentage of total weight; Carry out the atmosphere melting, then alloy is carried out the refining slagging-off, smelting temperature is 1280 ℃, melting 1 hour; To the alloy horizontal casting after the refining slagging-off, 1200 ℃ of casting temperatures, Blank drawing machine adopts and draws-push away-stop-and the billet withdrawing technology curve of La carries out throwing, casting speed remains on 300mm/min, adopts suitable cooling water pressure simultaneously, secondary cooling distance, stop/Lapie frequency of billet withdrawal etc.;
Alloy material obtains φ 34mm strand through horizontal continuous-casting, and alloy is through solution treatment, and 990 ℃, plastic deformation 45-55% behind the 60min;
After 1.5 hours, carry out the cold deformation processing of 35-45% 480 ℃ of temperature Ageing Treatment again, obtain the round bar base about φ 16-18mm,,, obtain the two ditch railway contacts wire of finished product through the pass drawing of 3-6 passage according to different contact wire sectional dimension requirements.Through above-mentioned processing, the intensity of this contact wire product reaches 580-650Mpa, elongation 5.3-6.7%, and conductivity is 77%IACS simultaneously.
Embodiment eight:
With copper is matrix, and the composition that adds in copper is 0.10% silver, 0.62% chromium by the percentage of total weight; Carry out the atmosphere melting, then alloy is carried out the refining slagging-off; Smelting temperature is 1285 ℃, melting 2 hours, alloy after the refining slagging-off is carried out horizontal casting, 1240 ℃ of casting temperatures, Blank drawing machine adopt and to draw-to push away-stop-the billet withdrawing technology curve of La carries out throwing, and casting speed remains on 320mm/min, adopt suitable cooling water pressure simultaneously, secondary cooling distance is stopped/Lapie frequency of billet withdrawal etc.;
Alloy material obtains φ 34mm strand through horizontal continuous-casting, and alloy is through 970 ℃ of solution treatment, plastic deformation 35-45% behind the 100min;
Aging temperature is 430 ℃, and the time is 3.0 hours, carries out the cold deformation processing of 35-45% again, obtain the round bar base about φ 16-18mm, according to different contact wire sectional dimension requirements,, obtain the two ditch railway contacts wire of finished product through the pass drawing of 3-6 passage.Through above-mentioned processing, the intensity of this contact wire product can reach 590-625Mpa, elongation 5.3-6.8%, and conductivity is 78%IACS simultaneously.
Embodiment nine:
With copper is matrix, and the composition that adds in copper is 0.07% silver, 0.45% chromium by the percentage of total weight; Carry out the atmosphere melting, then alloy is carried out the refining slagging-off; Smelting temperature is 1315 ℃, melting 1 hour; Alloy after the refining slagging-off is carried out horizontal casting, 1250 ℃ of casting temperatures, Blank drawing machine adopts and draws-push away-stop-and the billet withdrawing technology curve of La carries out throwing, casting speed remains on 340mm/min, adopts suitable cooling water pressure simultaneously, secondary cooling distance, stop/Lapie frequency of billet withdrawal etc.;
Alloy material obtains φ 30mm strand through horizontal continuous-casting, alloy through solution treatment (970 ℃, 60min) back plastic deformation 35-55%;
Aging temperature is 470 ℃, and the time is 2.5 hours, carries out the cold deformation processing of 35-45% again, obtain the round bar base about φ 16-18mm, according to different contact wire sectional dimension requirements,, obtain the two ditch railway contacts wire of finished product through the pass drawing of 3-6 passage.Through above-mentioned processing, the intensity of this contact wire product can reach 590-620Mpa, elongation 5.3-7.5%, and conductivity is 79.5%IACS simultaneously.
Embodiment ten:
With copper is matrix, and the composition that adds in copper is that 0.07% silver, 0.51% chromium carry out the atmosphere melting by the percentage of total weight, then alloy is carried out the refining slagging-off; Its smelting temperature is 1275 ℃, melting 1.5 hours: the alloy after the refining slagging-off is carried out horizontal casting, 1230 ℃ of casting temperatures, Blank drawing machine adopts and to draw-to push away-stop-the billet withdrawing technology curve of La carries out throwing, casting speed remains on 310mm/min, adopts suitable cooling water pressure simultaneously, secondary cooling distance, stop/Lapie frequency of billet withdrawal;
Alloy material obtains φ 34mm strand through horizontal continuous-casting, alloy through solution treatment (980 ℃, 100min) back plastic deformation 30-65%;
Aging temperature is 460 ℃, and the time is 2.0 hours, carries out the cold deformation processing of 35-55% again, obtain the round bar base about φ 16-18mm, according to different contact wire sectional dimension requirements,, obtain the two ditch railway contacts wire of finished product through the pass drawing of 3-6 passage.Through above-mentioned processing, the intensity of this contact wire product can reach 590-620Mpa, elongation 5.3-6.9%, and conductivity is 78.5%IACS simultaneously.
Claims (3)
1. a used for high-speed railway copper alloy contact wire is characterized in that, is matrix with copper, is the silver of 0.07%-0.15% and the chromium of 0.20%-0.72% to the percentage that wherein adds total weight.
2. the preparation method of a used for high-speed railway copper alloy contact wire is characterized in that, concrete steps are as follows:
1) with copper be matrix,, these raw materials put into smelting furnace to wherein adding silver and the 0.20-0.72% chromium that total weight percent is 0-0.15%, the atmosphere melting, smelting temperature is 1250 ℃-1350 ℃, melting 1-2 hour;
2) alloy is removed the gred;
3) alloy after the slagging-off is carried out semi-continuous casting, casting temperature is 1100 ℃-1250 ℃, obtains the ingot casting of φ 180-260mm, prepares hot rolling;
4) copper alloy casting ingot that the last step was obtained carries out hot rolling, 850 ℃-950 ℃ of start rolling temperatures, and finishing temperature is 450 ℃-550 ℃, 10-15 passage hot rolling deformation, finally obtaining diameter is the excellent base of φ 30-45mm;
5) solution treatment is put into heat-treatment furnace with the excellent base after the hot rolling, 980 ± 50 ℃ of temperature, and time 30-100min quenches after the insulation;
6) cold rolling, the cold deformation processing of deflection 35-50%;
7) Ageing Treatment, temperature 430-500 ℃, insulation 1.5-3h;
8) cold rolling, the cold deformation of deflection 30-50% is processed, and obtains the round bar base of φ 16-18mm;
9) cold drawing moulding, according to the contact wire sectional dimension, the pass drawing through the 3-6 passage obtains copper alloy contact wire.
3. the preparation method of a used for high-speed railway copper alloy contact wire is characterized in that, concrete steps are as follows:
1) with copper be matrix,, these raw materials put into smelting furnace to wherein adding silver and the 0.20%-0.72% chromium that total weight percent is 0-0.15%, the atmosphere melting, smelting temperature is 1250 ℃-1350 ℃, melting 1-2 hour;
2) alloy is carried out refining slagging-off, after refining is finished liquid alloy changed over to the continuous casting holding furnace;
3) beginning horizontal continuous-casting throwing, casting speed is at 270-360mm/min, and casting temperature is 1100 ℃-1250 ℃, obtains the strand of φ 30-45mm;
4) solution treatment is put into heat-treatment furnace with strand, 980 ± 50 ℃ of temperature, and time 30-100min quenches after the insulation;
5) cold rolling, the cold deformation processing of deflection 35-50%;
6) Ageing Treatment, temperature 430-500 ℃, insulation 1.5-3h;
7) cold rolling, the cold deformation of deflection 30-50% is processed, and obtains the round bar base of φ 16-18mm;
8) cold drawing moulding, according to the contact wire sectional dimension, the pass drawing through the 3-6 passage obtains copper alloy contact wire.
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| US10801087B2 (en) | 2016-05-16 | 2020-10-13 | Zhejiang University | High-strength and high-conductivity copper alloy and applications of alloy as material of contact line of high-speed railway allowing speed higher than 400 kilometers per hour |
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