CN105925838B - A kind of production technology of alloy - Google Patents
A kind of production technology of alloy Download PDFInfo
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- CN105925838B CN105925838B CN201610406730.0A CN201610406730A CN105925838B CN 105925838 B CN105925838 B CN 105925838B CN 201610406730 A CN201610406730 A CN 201610406730A CN 105925838 B CN105925838 B CN 105925838B
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- alloy
- copper
- slot wedge
- power generator
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
Abstract
The invention discloses a kind of production technology of alloy, the alloy is used for high-power generator rotor slot wedge, and the composition and its content (Wt%) of the alloy include：Ni 2.2~2.4, Cr 0.32~0.36, Si 0.55~0.60, P 0.02~0.03, Cu：Surplus；The technique includes melting, casting, solution treatment, ageing strengthening；This technique is matched by control composition, process optimization and carry out multiphase reinforcing, gained alloy material, 62~65%IACS of conductance；At 500 DEG C, 689~692MPa of tensile strength, 644~647MPa of yield strength, conductance is high, and resistance to elevated temperatures is good, long lifespan, the use requirement of high-power generator rotor slot wedge alloy can be met, while technique is simple, production cost is low, environmental pollution is small, with preferable market prospects and economic benefit.
Description
Technical field
The invention belongs to generator amature slot wedge material production technical field, and in particular to a kind of electricity generation machine rotor
The production technology of slot wedge alloy.
Background technology
Generator amature slot wedge will bear copper cash, insulating part and itself huge centrifugal force, electric current in rotor operating time slot
Higher temperature rise can be produced by flowing through slot wedge, and the alloy that conductance is high, resistance to elevated temperatures is excellent is needed to use during production rotor slot wedge
Material.
The patent of Application No. 200510123011《Large-capacity steam turbine generator rotor copper alloy slot wedge and its preparation side
Method》In, alloying component is：Ni:1.35~2.05%, Si:0.40~0.80%, Cr:0.05~0.25%, Be:0.15~
0.40%, Cu:Surplus；Production technology is mainly using 920~980 DEG C of solution treatment, 35~50% cold deformations, 450~500 DEG C of guarantors
Temperature 4~5h Ageing Treatments, air cooling.In the technical scheme, Be prices are high, and the high-temperature stability of influence alloy, make alloy unsuitable
Hot operation is born for a long time, while the dust that the alloy for adding Be is produced can be poisonous；Ni, Si quality proportioning exist in alloy
2.5~3.5 or so, Si content are relatively higher, only some Si formation Ni2Si precipitated phases, remaining Si exists with solid solution state,
Have a strong impact on the conductance of alloy；Gained alloy conductive rate is only 49%IACS, short life, and resistance to elevated temperatures is unknown.Application
Number be 200510038051.4 patent《Titan bronze for slot wedge on turbo generator rotor and its processing technology》In, titan bronze is used
Designed without cobalt without zirconium, its composition is：Be：0.1~0.3%, Ni：1.5~2.5%, Ti：0.4~0.6%, Cu：Surplus, gained
Alloy conductive rate is only 47%IACS, high temperature (427 DEG C) 480~550MPa of yield strength, 540~630MPa of tensile strength, work
Make short life, it is impossible to meet the demand of high-power generator long time running.
The content of the invention
The present invention is, in order to make up above-mentioned deficiency, and to be improved that there is provided a kind of alloy to composition proportion and production technology
Production technology, the alloy is used for high-power generator rotor slot wedge, and conductance is high, and resistance to elevated temperatures is good, and long lifespan can be met
The use requirement of high-power generator rotor slot wedge alloy, while technique is simple, production cost is low, and environmental pollution is small, tool
There are preferable market prospects and economic benefit.
A kind of production technology of alloy, the alloy be used for high-power generator rotor slot wedge, the composition of the alloy and its
Content (Wt%) includes：Ni 2.2~2.4, Cr 0.32~0.36, Si 0.55~0.60, P 0.02~0.03, Cu：Surplus；
Comprise the following steps：
1. melting：Cathode copper is first preheated to 250~280 DEG C, is reloaded into Ajax-Wyatt furnace, adds and covers when starting fusing
Lid agent, makes cladding thickness up to 1.2~1.4mm, all adds the phosphor-copper for accounting for copper mass 0.5~0.7% as deoxidier after fusing,
Skimmed, after supplement coverture, consider the physicochemical property of each element, routinely technique is added according to this by Si, P, Ni, Cr
In copper melts, insulation 15min comes out of the stove；
2. cast：Using conventional continuous casting process, base is forged on hydraulic press；
3. solution treatment：1.5h is heat-treated at 940~960 DEG C and carries out Water Quenching again, it is cold rolling alloy is produced 60%
Cold deformation；
4. ageing strengthening：Again by after heating strand to 460~480 DEG C of insulation 2.5h, required shape is machined into；It is described
The composition and its content (Wt%) of coverture be：50% charcoal, 30% cullet, 10%NaCl, 10%CaF2。
In the technical program, in terms of composition proportion, Cr can improve the electrical conductance of alloy, form Cr3Si phases influence to close
The high-temperature stability of gold, and the crystal grain of alloy is grown up during suppressing solution treatment to a certain extent；Because copper-based middle Be with
Ni2Si has similar mechanical performance, therefore, can properly increase Ni2Si content, obtains more preferable heat endurance and high temperature is strong
Degree, matches Ni and Si weight/mass percentage composition respectively 2.2~2.6%, 0.55~0.65%, it is to avoid contain solid solution state in alloy
Si, so as to improve the intensity and conductance of alloy, had both ensured the performance of alloy, and had reduced production cost, pollution is reduced again；
And add after Cr, Cr will be first dissolved in Cu than Ni, Si, have the substrate at saturation state, and Ni is improved to a certain extent2Si phases
Amount of precipitation, Ni, Si content are reduced in matrix, are reduced the degree of distortion of lattice in matrix, are improved the conductance of alloy；Make
Alloy contains the P that weight/mass percentage composition is 0.02~0.03%, is in order in the base that alloy will not be made to produce obvious distortion of lattice
On plinth, Ni3P precipitation phases are produced, the microhardness and tensile strength of alloy is further improved, and suppress analysis to a certain extent
Go out growing up for phase, purified alloy substrate, conductance is improved.
During alloy melting, the melting for reducing copper alloy from Ajax-Wyatt furnace is consumed, and cathode copper is first preheated before adding in stove,
Si, P, Ni, Cr are melted in order, rational shove charge and fusing order effectively shortens fusing time, coverture quality proportioning
From 50% charcoal, 30% cullet, 10%NaCl, 10%CaF2, the coverture spreadability is good, can be covered comprehensively during alloy melting
Lid liquid metal liquid level, the affinity with slag is strong, the ability with fabulous purification liquid metal, refining alloy, makes melt
Obtain suitably protecting and obtain preferably melting atmosphere；The phosphor-copper of addition 0.5~0.7% can be removed effectively as deoxidier
Oxygen particle in melt, effectively improves the quality and yield rate of alloy.
Melt Quenching Treatment, the method for aging of middle temperature processing precipitation precipitation hardening alloy, this method admittedly using high temperature to strand
Simple production process, is easy to alloy to be convenient for large-scale production.Treatment temperature during solution treatment does not produce crystal grain with alloy
Premised on thick, rapid cooling after temperature, held for some time is improved as far as possible, it is ensured that the solute element of precipitated phase reaches most in the base
Big solid solubility.Water Quenching is carried out again when being heat-treated 1.5h at 940~960 DEG C, and excessive phased soln obtains supersaturation
Solid solution, cold rolling alloy is produced larger cold deformation, alloy substrate is recrystallized, and intrinsic silicon is produced a large amount of dislocations,
The substructure of alloy is refined, but this working hardening is limited to the intensity contribution of copper alloy, it is necessary to which Ageing Treatment is further
Reinforcing, the Ageing Treatment through 460~480 DEG C of insulation 2.5h, alloying element is in the precipitated phase phase of Dispersed precipitate, and precipitation obtains hard
Change, alloy is obtained optimal performance.
The technical program is on the basis of common process, to be constituted by optimizing multicomponent alloy, addition is micro-, control
Composition proportion is avoided as much as or reduced the harmful effect to alloy conductance to improve the intensity of alloy, carries out many
Mutually strengthen, gained alloy material, at room temperature, 796~798MPa of tensile strength, 734~737MPa of yield strength, elongation 17.9
~18.2%, 62~65%IACS of conductance；At 500 DEG C, 689~692MPa of tensile strength, 644~647MPa of yield strength,
Conductance is high, and resistance to elevated temperatures is good, long lifespan, it is ensured that the security reliability of high-power generator.Electricity generation can be met
The use requirement of machine rotor slot wedge alloy, significantly improves the security reliability of high-power generator, while technique is simple, it is raw
Production cost is low, and environmental pollution is small, with preferable market prospects and economic benefit.
Specific embodiment
Embodiment one
A kind of high-power generator rotor slot wedge alloy is prepared, the composition and its content (Wt%) of each group alloy include：
2.2%Ni, 0.32%Cr, 0.55%Si, 0.02%P, Cu：Surplus；
The production technology of the high-power generator rotor slot wedge alloy, comprises the following steps：
1. melting：Cathode copper is first preheated to 250 DEG C, is reloaded into Ajax-Wyatt furnace, starts to add coverture during fusing,
Coverture mass component includes 50% charcoal, 30% cullet, 10%NaCl, 10%CaF2, cladding thickness is reached 1.2mm, entirely
The phosphor-copper for accounting for copper mass 0.5% is added after portion's fusing as deoxidier, is skimmed, after supplement coverture, each member is considered
The physicochemical property of element, by Si, P, Ni, Be, Cr, routinely technique is added in copper melts according to this, and insulation 15min comes out of the stove；
2. cast：Using conventional continuous casting process, base is forged on hydraulic press；
3. solution treatment：1.5h is heat-treated at 940 DEG C and carries out Water Quenching again, it is cold rolling alloy is produced 60% cold change
Shape；
4. ageing strengthening：Again by after heating strand to 460 DEG C of insulation 2.5h, required shape is machined into.
After testing, alloy property is as shown in the table：
Embodiment two
A kind of high-power generator rotor slot wedge alloy is prepared, the composition and its content (Wt%) of each group alloy include：
2.4%Ni, 0.36%Cr, 0.60%Si, 0.03%P, Cu：Surplus；
The production technology of the high-power generator rotor slot wedge alloy, comprises the following steps：
1. melting：Cathode copper is first preheated to 265 DEG C, is reloaded into Ajax-Wyatt furnace, starts to add coverture during fusing,
Coverture mass component includes 50% charcoal, 30% cullet, 10%NaCl, 10%CaF2, cladding thickness is reached 1.3mm, entirely
The phosphor-copper for accounting for copper mass 0.6% is added after portion's fusing as deoxidier, is skimmed, after supplement coverture, each member is considered
The physicochemical property of element, by Si, P, Ni, Be, Cr, routinely technique is added in copper melts according to this, and insulation 15min comes out of the stove；
2. cast：Using conventional continuous casting process, base is forged on hydraulic press；
3. solution treatment：1.5h is heat-treated at 950 DEG C and carries out Water Quenching again, it is cold rolling alloy is produced 60% cold change
Shape；
4. ageing strengthening：Again by after heating strand to 470 DEG C of insulation 2.5h, required shape is machined into.
After testing, alloy property is as shown in the table：
Embodiment three
A kind of high-power generator rotor slot wedge alloy is prepared, the composition and its content (Wt%) of each group alloy include：
2.6%Ni, 0.40%Cr, 0.65%Si, 0.03%P, Cu：Surplus；
The production technology of the high-power generator rotor slot wedge alloy, comprises the following steps：
1. melting：Cathode copper is first preheated to 280 DEG C, is reloaded into Ajax-Wyatt furnace, starts to add coverture during fusing,
Coverture mass component includes 50% charcoal, 30% cullet, 10%NaCl, 10%CaF2, cladding thickness is reached 1.4mm, entirely
The phosphor-copper for accounting for copper mass 0.7% is added after portion's fusing as deoxidier, is skimmed, after supplement coverture, each member is considered
The physicochemical property of element, by Si, P, Ni, Be, Cr, routinely technique is added in copper melts according to this, and insulation 15min comes out of the stove；
2. cast：Using conventional continuous casting process, base is forged on hydraulic press；
3. solution treatment：1.5h is heat-treated at 960 DEG C and carries out Water Quenching again, it is cold rolling alloy is produced 60% cold change
Shape；
4. ageing strengthening：Again by after heating strand to 480 DEG C of insulation 2.5h, required shape is machined into.
After testing, alloy property is as shown in the table：
Shown by above three embodiment, using the technical program, gained alloy material, at room temperature, tensile strength 796~
798MPa, 734~737MPa of yield strength, elongation 17.9~18.2%, 62~65%IACS of conductance；At 500 DEG C, tension
689~692MPa of intensity, 644~647MPa of yield strength, conductance are high, and resistance to elevated temperatures is good, and long lifespan can be met high-power
The use requirement of generator amature slot wedge alloy, it is ensured that the security reliability of high-power generator.
Claims (1)
1. a kind of production technology of alloy, it is characterised in that：The alloy is used for high-power generator rotor slot wedge, the alloy
Composition and its content (Wt%) include：Ni 2.2~2.4, Cr 0.32~0.36, Si 0.55~0.60, P 0.02~0.03,
Cu：Surplus；Comprise the following steps：
1. melting：Cathode copper is first preheated to 250~280 DEG C, is reloaded into Ajax-Wyatt furnace, starts to add covering during fusing
Agent, makes cladding thickness up to 1.2~1.4mm, all adds the phosphor-copper for accounting for copper mass 0.5~0.7% as deoxidier after fusing, enter
Row is skimmed, and after supplement coverture, considers the physicochemical property of each element, routinely technique sequentially adds copper by Si, P, Ni, Cr
In melt, insulation 15min comes out of the stove；
2. cast：Using conventional continuous casting process, base is forged on hydraulic press；
3. solution treatment：1.5h is heat-treated at 940~960 DEG C and carries out Water Quenching again, it is cold rolling alloy is produced 60% cold change
Shape；
4. ageing strengthening：Again by after heating strand to 460~480 DEG C of insulation 2.5h, required shape is machined into；The covering
The composition and its content (Wt%) of agent be：50% charcoal, 30% cullet, 10%NaCl, 10%CaF2。
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| CN201310619578.0A CN103643079B (en) | 2013-11-29 | 2013-11-29 | A kind of high-power generator rotor slot wedge alloy and production technology thereof |
| CN201610406730.0A CN105925838B (en) | 2013-11-29 | 2013-11-29 | A kind of production technology of alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106011535B (en) * | 2016-07-19 | 2017-11-24 | 山东大学 | A kind of rare-earth oxide modified corson alloy material and its preparation method and application |
| CN107385275A (en) * | 2017-08-15 | 2017-11-24 | 徐高杰 | A kind of rotor of steam turbo generator copper alloy and its processing technology |
| CN107502781A (en) * | 2017-08-15 | 2017-12-22 | 徐高杰 | A kind of rotor of steam turbo generator slot wedge material and its processing technology |
| CN107385276A (en) * | 2017-08-15 | 2017-11-24 | 徐高杰 | A kind of generator amature slot wedge copper alloy and its processing technology |
| CN107552748A (en) * | 2017-08-16 | 2018-01-09 | 徐高杰 | A kind of covering agent for smelting copper alloy and its application method |
| CN114535584A (en) * | 2022-04-07 | 2022-05-27 | 新乡市七星钎焊科技有限公司 | Production process of particle phosphorus-copper alloy |
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| US4191601A (en) * | 1979-02-12 | 1980-03-04 | Ampco-Pittsburgh Corporation | Copper-nickel-silicon-chromium alloy having improved electrical conductivity |
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2013
- 2013-11-29 CN CN201610401755.1A patent/CN105803253B/en active Active
- 2013-11-29 CN CN201610406730.0A patent/CN105925838B/en active Active
- 2013-11-29 CN CN201310619578.0A patent/CN103643079B/en active Active
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| US4191601A (en) * | 1979-02-12 | 1980-03-04 | Ampco-Pittsburgh Corporation | Copper-nickel-silicon-chromium alloy having improved electrical conductivity |
| JP4785092B2 (en) * | 2007-11-05 | 2011-10-05 | 古河電気工業株式会社 | Copper alloy sheet |
| CN102108459A (en) * | 2009-12-23 | 2011-06-29 | 沈阳兴工铜业有限公司 | High-strength nickel-chromium-silicon-copper alloy material and processing technology thereof |
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| Publication number | Publication date |
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| CN103643079A (en) | 2014-03-19 |
| CN105803253B (en) | 2017-07-28 |
| CN105803253A (en) | 2016-07-27 |
| CN105925838A (en) | 2016-09-07 |
| CN103643079B (en) | 2016-05-11 |
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