CN102864334B - Preparation method of copper-nickel disilicon-copper sheet strip - Google Patents
Preparation method of copper-nickel disilicon-copper sheet strip Download PDFInfo
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- CN102864334B CN102864334B CN201210343488.9A CN201210343488A CN102864334B CN 102864334 B CN102864334 B CN 102864334B CN 201210343488 A CN201210343488 A CN 201210343488A CN 102864334 B CN102864334 B CN 102864334B
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Abstract
The invention relates to a copper-nickel disilicon-copper sheet strip, particularly a preparation method of a copper-nickel disilicon-copper sheet strip, which solves the problem of poor final tensile strength in the existing special copper-nickel disilicon-copper sheet strip for high-speed railways and electric railways. The preparation method of the copper-nickel disilicon-copper sheet strip comprises the following steps: proportionally adding copper, nickel and silicon into a furnace body of an industrial-frequency cored induction furnace, smelting, and sufficiently mixing to obtain a smelting liquid; carrying out semi-continuous casting in a graphite inner casing crystallizer to obtain a rectangular cast ingot; putting the rectangular cast ingot into a coal gas continuous heating furnace, and heating; carrying out 5-pass reversible rolling on the cast ingot by using a two-roller reversible hot-rolling mill; after unreeling the hot rolling blank, carrying out bifacial face milling by using bifacial milling equipment to obtain a sheet strip; carrying out 7-pass reversible rolling by using a four-roller reversible roughing mill; and carrying out annealing technique. The product prepared by the method provided by the invention is soft, has favorable plasticity, and can easily form. The invention can be widely used for producing copper alloy sheet strips.
Description
Technical field
The present invention relates to copper nickel two copper-silicon alloy strips, be specially a kind of preparation method of copper nickel two copper-silicon alloy strips.
Background technology
High ferro and electric railway special purpose copper nickel two copper-silicon alloy strips (being CuNi2Si strip) are mainly used in making Catenary Fittings, and the desirable final tensile strength of Catenary Fittings is >=600MPa.The CuNi2Si strip of domestic production is at present the hard state of timeliness (being Y state), the direct impact briquetting of downstream user, after punching press, no longer heat-treat, the problem of existence is: 1, the final tensile strength of product is 480-580MPa, does not reach the technical requirements of Catenary Fittings; 2, because product is the hard state of timeliness, thus during punching press because material is hard, plasticity is poor, be difficult for impact briquetting, have cracking and the large risk of unrelieved stress, and the load that mould bears during punching press is large, fragile mould.
Summary of the invention
The present invention, in order to solve the poor problem of final tensile strength of existing high ferro and electric railway special purpose copper nickel two copper-silicon alloy strips, provides a kind of preparation method of copper nickel two copper-silicon alloy strips.
The present invention adopts following technical scheme to realize: the preparation method of copper nickel two copper-silicon alloy strips, comprises the steps:
(1), according to the useful volume of commercial frequency cored induction furnace, according to mass ratio, be copper: nickel: silicon=97.5:2:0.5 prepares burden; The body of heater post-heating of copper, nickel being put into commercial frequency cored induction furnace carries out melting technology to 1250-1280 ℃, after melting completes, silicon is added in body of heater and after bath surface covers the charcoal that a layer thickness is 150-200mm and be incubated 30 minutes, then, fully stir and obtain melting water (melting water is also referred to as copper water).
(2), adopting graphite inner sleeve crystallizer that bottom is provided with secondary cooling apparatus to carry out temperature to above-mentioned copper water is that the semicontinuous casting technique of 1250-1280 ℃, casting speed 3.8-4.0 m/h obtains the rectangle ingot casting that thickness is 150mm.After the refrigerating unit that first adopts graphite inner sleeve crystallizer to carry is cooling to rectangle ingot casting, adopt again secondary cooling apparatus cooling to rectangle ingot casting, cooling intensity can be not excessive like this, avoid causing that thereby internal stress causes too greatly ingot casting to occur crackle or the rear material base cracking of casting, and coolingly realize the casting of red ingot twice, reduce ingot casting internal stress, thereby obtained fine and close cast structure uniformly.Described secondary cooling apparatus is the technology that those skilled in the art easily realize, and at least can adopt the patent No. is the secondary cooling apparatus of 201120261931.9 copper alloy strand, is hung on the bottom of graphite inner sleeve crystallizer during use.
(3), above-mentioned rectangle ingot casting is put into after coal gas continuous heating furnace heats 3 hours to 900-920 ℃ and is incubated 2.75-3.25 hour again; Again ingot casting being carried out to breaking down temperature with the two roller reversible hot milling rolls that hot rolling track is installed in line refrigerating unit is up and down that 900-920 ℃, finishing temperature are the 5 passage reversible rollings of the 150-110-60-32-19-16 of 800-850 ℃; Last passage goes out opening installation after roll, and in the upper and lower on-line cooling device of hot rolling track, to carry out speed of cooling be the 10 ℃/more than S online water-cooled of made-up belt, is cooled to after room temperature the direct hollow clot of hot rolling base.
(4), above-mentioned hot rolling base is carried out to Double Milling face that upper and lower milling thickness is 0.8-1mm to remove the oxide skin on hot rolling base surface with Double Milling turning equipment after uncoiling on Abrollhaspel, obtain strip.
(5), above-mentioned strip is adopted the reversible roughing mill of four rollers carry out 7 passage reversible rollings of 14-12.8-10-8-6.2-5-4-3.6 ± 0.03; With continuous copper strip bright annealing furnace, carry out the annealing process that Heating temperature is 900 ℃, tapping temperature 40-50 ℃ again, thereby obtain CY state copper nickel two copper-silicon alloy strips.
Described commercial frequency cored induction furnace, graphite inner sleeve crystallizer, two roller reversible hot milling rolls, Abrollhaspel, Double Milling turning equipment, the reversible roughing mill of four rollers, continuous copper strip bright annealing furnace are currently available products, can directly from market, buy.
With after crucible sampling, pour the melting water obtaining in above-mentioned preparation method into graphite mo(u)ld, be cooled to the zone of oxidation of removing bottom after solid-state, carry out chemical composition analysis on spectrum analyzer, its result is as shown in table 1 below, meets GB standard.
Table 1
| Cu | Ni | Si | Fe | Mn | Zn | Cd | Pb | All the other impurity |
| Surplus | 1.8～2.2 | 0.4～0.8 | ≤0.2 | ≤0.1 | ≤0.2 | ≤0.005 | ≤0.02 | ≤0.3 |
Preparation method of the present invention has utilized solution strengthening (thereby phenomenon that alloying element solid solution causes lattice distortion to a certain degree that alloy strength is improved in matrix metal) and precipitation strength (precipitation hardening, also claim precipitation strength, refer to metal in supersaturated solid solution Segregation solute atom district and/or by precipitation go out particulate disperse and be distributed in matrix and lead scleratogenous a kind of thermal treatment process) theory, adopt hot rolling, twice solution treatment of annealing, Ni while utilizing high temperature, Si solubleness is higher, with sosoloid form, be present in Ji Tongzhong, cooling rear sosoloid solubleness declines rapidly fast, and separate out with Ni2Si compound form, form supersaturated solid solution, realized high strength requirement, thereby improved the final tensile strength of copper alloy plate strip.
The copper nickel two copper-silicon alloy strip products that the present invention makes are CY(solid solution+deformation strengthening) state product, its property indices sees the following form shown in 2:
Table 2
Before user uses as required through punching press, obtain Y state finished product after heat-treating profiled, and can find out from upper table 2, product material that the present invention makes is soft, plasticity good, very easily impact briquetting, so heat-treat and can well eliminate the unrelieved stress producing in punching course after punching press, the property indices of its Y state finished product sees the following form shown in 3:
Table 3
And existing copper nickel two copper-silicon alloy strip products are Y state product, the property indices of the Y state finished product obtaining after impact briquetting as required before user uses is as shown in table 4 below:
Table 4
After upper table 2,3 is contrasted, can find out, the finished product that the present invention obtains has been compared obvious advantage with the properties of existing finished product, and intensity hardness is large and unit elongation is high, and tensile strength meets the technical requirements of Catenary Fittings completely.
Product material that the present invention makes is soft, plasticity good, easy-formation, and final tensile strength is >=600MPa to meet Catenary Fittings requirement; The poor problem of final tensile strength that has solved existing high ferro and electric railway special purpose copper nickel two copper-silicon alloy strips, can be widely used in the production of copper alloy plate strip.
Embodiment
The preparation method of copper nickel two copper-silicon alloy strips, comprises the steps:
(1), according to the useful volume of commercial frequency cored induction furnace, according to mass ratio, be copper: nickel: silicon=97.5:2:0.5 prepares burden; Body of heater post-heating to 1250-1280 ℃ (1250 ℃, 1265 ℃, 1280 ℃) of copper, nickel being put into commercial frequency cored induction furnace carry out melting technology, after melting completes, silicon being added in body of heater and covering a layer thickness at bath surface is 150-200mm(150mm, 175mm, 200mm) charcoal after be incubated 30 minutes, then, fully stir and obtain melting water;
(2), adopting graphite inner sleeve crystallizer that bottom is provided with secondary cooling apparatus to carry out temperature to above-mentioned melting water is that the semicontinuous casting technique of 1250-1280 ℃ (1250 ℃, 1265 ℃, 1280 ℃), casting speed 3.8-4.0 m/h (3.8 ms/h, 3.9 ms/h, 4.0 ms/h) obtains the rectangle ingot casting that thickness is 150mm;
(3), above-mentioned rectangle ingot casting being put into coal gas continuous heating furnace heats and after (900 ℃, 910 ℃, 920 ℃), is incubated 2.75-3.25 hour in 3 hours to 900-920 ℃ again; Again ingot casting being carried out to breaking down temperature with the two roller reversible hot milling rolls that hot rolling track is installed in line refrigerating unit is up and down the 900-920 ℃ of 5 passage reversible rollings that (900 ℃, 910 ℃, 920 ℃), finishing temperature are the 150-110-60-32-19-16 of 800-850 ℃ (800 ℃, 825 ℃, 850 ℃); Last passage goes out to roll rear opening installation and in the upper and lower on-line cooling device of hot rolling track, carries out the online water-cooled of made-up belt of 10 ℃/S of speed of cooling, is cooled to after room temperature the direct hollow clot of hot rolling base;
(4), above-mentioned hot rolling base is carried out to Double Milling face that upper and lower milling thickness is 0.8-1mm to remove the oxide skin on hot rolling base surface with Double Milling turning equipment after uncoiling on Abrollhaspel, obtain strip;
(5), above-mentioned strip is adopted the reversible roughing mill of four rollers carry out 7 passage reversible rollings of 14-12.8-10-8-6.2-5-4-3.6 ± 0.03; With continuous copper strip bright annealing furnace, carrying out Heating temperature is again 900 ℃, the annealing process of tapping temperature 40-50 ℃ (40 ℃, 45 ℃, 50 ℃), thereby obtains copper nickel two copper-silicon alloy strips.
Claims (1)
1. the preparation method of copper nickel two copper-silicon alloy strips, is characterized in that: comprise the steps:
(1), according to the useful volume of commercial frequency cored induction furnace, according to mass ratio, be copper: nickel: silicon=97.5:2:0.5 prepares burden; The body of heater post-heating of copper, nickel being put into commercial frequency cored induction furnace carries out melting technology to 1250-1280 ℃, after melting completes, silicon is added in body of heater and after bath surface covers the charcoal that a layer thickness is 150-200mm and be incubated 30 minutes, then, fully stir and obtain melting water;
(2), adopting graphite inner sleeve crystallizer that bottom installs secondary cooling apparatus to carry out temperature to above-mentioned melting water is that the semicontinuous casting technique of 1250-1280 ℃, casting speed 3.8-4.0 m/h obtains the rectangle ingot casting that thickness is 150mm;
(3), above-mentioned rectangle ingot casting is put into after coal gas continuous heating furnace heats 3 hours to 900-920 ℃ and is incubated 2.75-3.25 hour again; Again ingot casting being carried out to breaking down temperature with the two roller reversible hot milling rolls that hot rolling track is installed in line refrigerating unit is up and down that 900-920 ℃, finishing temperature are the 5 passage reversible rollings of the 150mm-110mm-60mm-32mm-19mm-16mm of 800-850 ℃; Last passage goes out to roll rear opening installation and carries out in the upper and lower on-line cooling device of hot rolling track the online water-cooled of made-up belt that speed of cooling is 10 ℃/s, is cooled to after room temperature the direct hollow clot of hot rolling base;
(4), above-mentioned hot rolling base is carried out to Double Milling face that upper and lower milling thickness is 1mm to remove the oxide skin on hot rolling base surface with Double Milling turning equipment after uncoiling on Abrollhaspel, obtain strip;
(5), above-mentioned strip is adopted the reversible roughing mill of four rollers carry out the 7 passage reversible rollings of 14mm-12.8mm-10mm-8mm-6.2mm-5mm-4mm-3.6mm ± 0.03mm; With continuous copper strip bright annealing furnace, carry out the annealing process that Heating temperature is 900 ℃, tapping temperature 40-50 ℃ again, thereby obtain copper nickel two copper-silicon alloy strips.
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| CN105316520B (en) * | 2015-11-26 | 2017-11-14 | 山西春雷铜材有限责任公司 | A kind of preparation method of Cu Ni Sn copper alloy plate strips |
| CN109338259A (en) * | 2018-11-28 | 2019-02-15 | 江阴电工合金股份有限公司 | The annealing device and its method of two silicon of high-strength high-elasticity cupro-nickel |
| CN112030034A (en) * | 2020-09-04 | 2020-12-04 | 孙勇 | Production process of high-quality QAL10-5-4 aluminum bronze alloy |
| CN112322917A (en) * | 2020-10-16 | 2021-02-05 | 山西春雷铜材有限责任公司 | Preparation method of Cu-Cr-Si-Ti copper alloy plate strip |
| CN113695388B (en) * | 2021-08-31 | 2023-08-08 | 山西春雷铜材有限责任公司 | Production method of copper-manganese-nickel hot rolled coil |
| CN113699401A (en) * | 2021-08-31 | 2021-11-26 | 山西春雷铜材有限责任公司 | Preparation method of high-strength high-bending copper-nickel-silicon alloy strip |
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| CN101719527A (en) * | 2009-12-03 | 2010-06-02 | 绍兴市力博电气有限公司 | Production technique of copper strips for solar modules |
| CN102199711A (en) * | 2011-04-15 | 2011-09-28 | 中天合金技术有限公司 | Production method of high-precision ultralong oxygen-free copper strip |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101719527A (en) * | 2009-12-03 | 2010-06-02 | 绍兴市力博电气有限公司 | Production technique of copper strips for solar modules |
| CN102199711A (en) * | 2011-04-15 | 2011-09-28 | 中天合金技术有限公司 | Production method of high-precision ultralong oxygen-free copper strip |
Non-Patent Citations (2)
| Title |
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| 张毅等.时效对Cu-2.0Ni-0.5Si合金组织和性能的影响.《特种铸造及有色合金》.2008,第28卷(第10期),第810-813、VI页. |
| 时效对Cu-2.0Ni-0.5Si合金组织和性能的影响;张毅等;《特种铸造及有色合金》;20081231;第28卷(第10期);第810-813、VI页 * |
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