CN106624603A - ACP1000 anti-vibration strip assembly and production method thereof - Google Patents
ACP1000 anti-vibration strip assembly and production method thereof Download PDFInfo
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- CN106624603A CN106624603A CN201510718562.4A CN201510718562A CN106624603A CN 106624603 A CN106624603 A CN 106624603A CN 201510718562 A CN201510718562 A CN 201510718562A CN 106624603 A CN106624603 A CN 106624603A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to an ACP1000 anti-vibration strip assembly and a production method thereof. The anti-vibration strip assembly comprises an anti-vibration strip of a V-shaped structure, and two end caps respectively fixed at the two ends of the anti-vibration strip in a sleeving manner, wherein all the end caps are fixed at the end parts of the anti-vibration strips through a plurality of locating pins or screws. The ACP1000 anti-vibration strip assembly is simple in structure; the product quality meets the requirement of a steam generator in a nuclear power plant for the precision of the anti-vibration strip; and the ACP1000 anti-vibration strip assembly is safer to use. Due to strict preparation procedures, the preparation method of the ACP1000 anti-vibration strip assembly guarantees the technological requirement for the anti-vibration strip assembly of the steam generator in the nuclear power plant, guarantees the quality and improves the safety; by the additional arrangement of the locating pins on the end caps, the phenomenon of pulling out of the end caps in the assembling process of the anti-vibration strip assembly and a U-shaped pipe is avoided.
Description
Technical field
A kind of ACP1000 antivibratioves bar assembly of present invention design and its production method.
Background technology
U-shaped heat transfer tube in domestic third generation pressurized-water reactor nuclear power plant ACP1000 is that most critical is also in primary Ioops system pressure border
Most weak link.Once tube vibration is destroyed, steam generator must be changed, this certainly will cause manpower, financial resources and event
Huge waste, also increase maintainer by radioactivity irradiation danger.Therefore, solve that steam generator is broken to run affairs therefore be to close
It is tied to the safety of nuclear power station and makes nuclear power station that there is the key issue of competitiveness and vitality.
The root that vibration is produced is eliminated as far as possible, the elbow for generally requiring U-shaped heat-transfer pipe in a vapor generator installs anti-vibration bar additional
How component (i.e. ACP1000 antivibratioves bar assembly), provide a kind of resistance to shock good antivibration bar assembly, is that the technology of this area is difficult
Topic.
ACP1000 antivibration bar assembly production alloys, Jing after the 960 DEG C of annealing of many cold rolling cold-strips for obtaining band ring-type envelope is made
Cracking phenomenon during fitting, the alloy grain degree that Metallographic Analysis shows problem of Cracking occur is 3.5～6.5 grades, is abnormal thick
Crystal grain, and it is excessive with the grain size difference of batch products, if being not for the differential larger product of grain size carries out differentiation process,
The properties of product for obtaining are inconsistent, directly affect material deep drawability and sealing property, the matter of relation ACP1000 antivibration bar assembly
Amount and life-span.
Expansion alloy cold-strip how is avoided to occur coarse grain in the fabrication process, obtain the differential less cold rolling strap of grain size
Material is those skilled in the art's technical issues that need to address.
The content of the invention
The technical problem to be solved be to provide the good ACP1000 antivibratioves bar assembly of a kind of simple structure, resistance to shock and
Its production method.
In order to solve the above problems, the invention provides a kind of ACP1000 antivibratioves bar assembly, including：The antivibration of V-shape structure
Bar, respectively located at two end caps at anti-vibration bar two ends, each end cap is fixed on described fixed cover by multiple alignment pins or screw
The end of anti-vibration bar.
The end cap and anti-vibration bar are provided with the through hole being suitable to detent fit.
Or the end of the end cap and anti-vibration bar is provided with the screwed hole coordinated with the screw thread.
Anti-vibration bar two ends end is rectangular, and at remaining in a tubular form, four sides of the rectangular portion are provided with chamfering, the end cap
The rectangular channel coordinated with the rectangular portion is inside provided with, makes end cap that end can be only confined to when being arranged, be easily installed.
The end cap and alignment pin select 690 nickel-bass alloy materials, and the U-shaped heat transfer tube in unit steam generator is also Ni-based
Alloy material, three's material is identical, can facilitate and be welded and fixed on alignment pin, U-shaped heat transfer tube and the end cap.690 is Ni-based
The characteristics of alloy material has corrosion resistance strong simultaneously.The screw and positioning pin surface are provided with one layer of wearing layer, to avoid screw
Loosen because of abrasion with alignment pin, it is ensured that resistance to shock, the wearing layer is made up of zirconia ceramics material.
The each composition and its percentage by weight that the anti-vibration bar includes includes：
C≤0.03%；
P≤0.020%；
S≤0.020%；
Mn≤0.50%；
Si≤0.30%；
Cu≤0.20%；
Cr≤0.20%；
Mo≤0.20%；
Ni：28.5～29.5%；
Co：16.8～17.8%；Balance of ferrum；The anti-vibration bar grain size is for 6～9 grades and differential within 1.5 grades.
A kind of production method of above-mentioned anti-vibration bar, including：
Dispensing → evacuation → applying argon gas → energization → melting → plus rare earth element → power failure → cast, obtain steel ingot after cooling；
Then forged steel, repeatedly hot rolling, cold rolling and intermediate heat-treatment, finished product heat treatment are carried out：
A. forged steel：1280 DEG C of initial forging temperature, final forging temperature are not less than 1150 DEG C, subsequently carry out air cooling and obtain made-up belt；
B. hot rolling：Made-up belt is carried out into multistage hot deformation, finishing temperature is not less than 1050 DEG C, obtain half into base；
C. many cold rolling and intermediate heat-treatments：Many times of Jing is cold rolling and intermediate annealing will half into base finish rolling into the satisfactory band of thickness,
Intermediate anneal temperature is controlled at 1050～1100 DEG C；
D. band bending is in V-shape；
E. finished product heat treatment：Band is carried out into bright annealing in the range of 940～960 DEG C, that is, obtains above-mentioned anti-vibration bar.
During iron cobalt nickel alloy is smelted and steel ingot is obtained, smelting temperature is controlled more than 1500 DEG C, is added before tapping in melting
Enter at least one in rare earth element ce, La as catalyst, the weight of the rare earth element of addition accounts for the hundred of its dispensing gross mass
Divide than being 0.05～0.20%；Due to the equilibrium distribution coefficient very little of rare earth, in process of setting, rare-earth enrichment is in crystallization front
Liquid phase, prevents growing for crystal, makes high-temperature liquid metal that more cores are formed in process of setting, brilliant so as to reach refinement
The purpose of grain, and cause the anti-vibration bar grain size for 6～9 grades and differential within 1.5 grades.For same material, alloy
As-cast grain it is thinner, the crystal grain of rolled products is also thinner.And the rare earth element for adding, in smelting process with O, S etc. its
The oxysulfide of its element reaction rare earth, its fusing point is very high and stable, molten steel after calmness, rare earth oxide, sulfide
To exclude from steel, so as to purify molten steel, the alloy purity for obtaining is higher.
Further, temperature control is at 600～800 DEG C when hot-rolled billet enters stove, it is to avoid temperature is too high when entering stove causes product burning,
Waste heat after the processing of effectively utilizes forge hot simultaneously, reduces energy waste.
Further, total deformation is controlled 50%～65% when repeatedly cold rolling, material can be avoided in germanative condition, led
Cause to generate thick recrystal grain after annealing；Multi- pass rolling can effectively make the grain size of rolled strip more uniform.
Further, it is cold rolling it is front carry out reconditioning process to surface, remove face crack.
The invention has the beneficial effects as follows：(1) ACP1000 antivibration bar assemblies of the invention, simple structure, product quality meets core
Rigorous of the steam generator to anti-vibration bar, safer when using in power station.The preparation method of this anti-vibration bar, Jing is strict
Preparation section, it is ensured that to the technological requirement of the antivibration bar assembly of steam generator in nuclear power station, it is ensured that quality, improve peace
Quan Xing, using on the cap of end alignment pin is increased, and is made to be produced in assembling process of the end cap in antivibration bar assembly with U-tube and is pulled.
(2) anti-vibration bar production method operation of the invention is simple, it is easy to controls, uniformity is higher, can avoid in follow-up processing
Because with the differential larger difficulty increasing for causing processing technique different, causing waste and the production of resource of batch of material grain size；By
Rare earth element is added in smelting process and is removed in follow-up cooling, the degree of purity of blank can be effectively increased, while refining base
Material as-cast grain, is to avoid the occurrence of coarse grain during following process to lay the foundation, and the band grain size for obtaining is generally 6～9
Level；Using multi-pass, the hot rolling of aximal deformation value and cold rolling processing, can effectively make the grain size of rolled strip more uniform,
Avoid crystal grain differential excessive, it is full with the differential band better adaptability within 1.5 grades, obtaining of a batch of product grains degree
The foot use requirement of ACP1000 antivibration bar assemblies.
Description of the drawings
With reference to the accompanying drawings and examples the present invention is further described.
Fig. 1 is the structural representation of the ACP1000 antivibration bar assemblies of the present invention；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the A-A partial enlarged drawings of Fig. 1；
Fig. 4 is the structural representation for installing rear end cap；
Fig. 5 is the generalized section of Fig. 4.
Specific embodiment
See Fig. 1-2, a kind of ACP1000 antivibratioves bar assembly of the present embodiment, including：The anti-vibration bar 1 of V-shape structure, respectively
Located at two end caps 2 at the two ends of anti-vibration bar 1, each end cap 2 is fixed on described fixed cover by multiple alignment pins 3 or screw
The end of anti-vibration bar 1.
The end cap 2 and anti-vibration bar 1 are provided with the through hole for being suitable to coordinate with alignment pin 3.
Or the end of the end cap 2 and anti-vibration bar 1 is provided with the screwed hole coordinated with the screw thread.
The two ends end of the anti-vibration bar 1 is rectangular, and at remaining in a tubular form, four sides of the rectangular portion are provided with chamfering, the end
The rectangular channel coordinated with the rectangular portion is provided with cap 2, makes end cap 2 that end can be only confined to when being arranged, be easily installed, it is described
The end of end cap 2 is provided with chamfering, and the end of the alignment pin 3 is provided with chamfering.
The end cap and alignment pin select 690 nickel-bass alloy materials, and the U-shaped heat transfer tube in unit steam generator is also Ni-based
Alloy material, three's material is identical, can facilitate and be welded and fixed on alignment pin, U-shaped heat transfer tube and the end cap.690 is Ni-based
The characteristics of alloy material has corrosion resistance strong simultaneously.
The present embodiment has manufactured experimently 3 batches of anti-vibration bars, is separately added into the rare earth element of different proportion, and through dispensing → evacuation →
Applying argon gas → energization → melting → plus rare earth element → power failure → cast, obtain steel ingot after cooling；During comparative example is prepared,
Remaining is identical with the production technology of embodiment in addition to rare earth element is not added in fusion process, and the blank to obtaining uses power spectrum
Instrument carries out chemical element component detection, and the rare earth elements content added in its result and smelting process is shown in Table 1, wherein surplus
Fe constituent contents are unlisted.
To smelt the embodiment steel ingot that obtains and comparative example steel ingot carry out forging, 1280 DEG C of initial forging temperature, 1150 DEG C of final forging temperature,
Obtain the made-up belt that thickness is 28mm or so.
Carry out hot rolling after made-up belt is reheated, charging temperature control at 600～800 DEG C, 1180～1200 DEG C of heating-up temperature,
Preheating time 30～40min, 1160 DEG C of temperature retention time ＜ 10min, start rolling temperature ＞, 1050 DEG C of finishing temperature ＞ is empty after finish to gauge
It is cold；Rolling mill practice be 28 → 23 → 18 → 14 → 11 → 8.5 → 7 → 6 → 5 → 4.2mm, total deformation 85.0%, 9 hot rolling roads
Secondary, to obtain wall thickness be 4.2mm half into base.
Intermediate heat-treatment is carried out into base by obtain half, the then leaching of Jing alkali, water quenching, three pickling, high pressure water washing, neutralization is removed
Hot-working oxide skin, then carries out half-and-half carrying out reconditioning into base surface using levigator；Half answers >=4 times into base per face water mill number of times,
Until steel strip surface roughness reaches 2～3 μm, the defect such as surface does not scratch, crackle, peeling.
Partly carrying out into base after by reconditioning is cold rolling, and cold rolling passage is more, and strip surface roughness is less, and surface is brighter and cleaner；Will
It is 1.5mm that thickness is rolled down to thickness for the embodiment 1,2,3 of 4.2mm and the band of comparative example by different cold rolling passes,
Total deflection is 64.3%, and wherein embodiment 1 rolls 5 passages, and embodiment 2 rolls 6 passages, the rolling of embodiment 37
Passage, comparative example rolls 5 passages.Intermediate heat-treatment is carried out between adjacent cold rolling pass, temperature is 1080～1100 DEG C.
Then, it is in V-shape by band bending；Finally, the band 350mm after the cold rolling 1.5mm for obtaining is used into protective atmosphere
Bright annealing unit carries out respectively finished product heat treatment, and temperature is 940～960 DEG C；Bright annealing work atmosphere be 75% hydrogen and
25% nitrogen mixed gas, it is to avoid strip surface is aoxidized.
Finished product after heat treatment is sampled respectively, reference numerals, according to the regulation of YBT5231-2005 standards, in vacuum or
Sample is heated to into 900 DEG C of 20 DEG C of scholars in hydrogen atmosphere, lh is incubated, 1100 DEG C of 20 DEG C of scholars are again heated to, 15min is incubated,
Come out of the stove with being not more than the speed of 5 DEG C/min and being cooled to less than 200 DEG C.Sample to obtaining carries out grain size detection, obtains result and sees
Table 2.
The rare earth element content added in the embodiment of table 1 and comparative example chemical element component and smelting process
The each sample grain size testing result of table 2
As shown in Table 2, in the case of cold rolling same passage, the embodiment 1 that rare earth element is added in smelting process is obtained
Anti-vibration bar grain size between 6.5 grades to 8 grades, with not in smelting process add rare earth element comparative example obtained in resist
Shake bar grain size compare it is clearly finer and differential less；And from comparative example 2 and comparative example 3, within the specific limits with
The increase of rare earth element and the increase of cold rolling pass, the band grain size for obtaining is thinner and differential less；By in smelting process
Middle addition rare earth element is simultaneously removed in follow-up cooling, the degree of purity of blank can be effectively increased, while it is brilliant to refine blank as cast condition
Grain, is to avoid the occurrence of coarse grain during following process to lay the foundation；Using multi-pass, the hot rolling of aximal deformation value and it is cold rolling plus
Work, can effectively make the grain size of rolled strip more uniform, it is to avoid crystal grain is differential excessive, with a batch of product grains degree
The differential band better adaptability within 1.5 grades, obtaining.
Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and is not the embodiment party to the present invention
The restriction of formula.For those of ordinary skill in the field, other not similar shapes can also be made on the basis of the above description
The change or variation of formula.There is no need to be exhaustive to all of embodiment.
Claims (9)
1. a kind of ACP1000 antivibratioves bar assembly, it is characterised in that include：The anti-vibration bar of V font structures（1）, respectively fixed cover is located at anti-vibration bar（1）Two end caps at two ends（2）, each end cap（2）By multiple alignment pins（3）Or screw is fixed on the anti-vibration bar（1）End.
2. ACP1000 antivibratioves bar assembly according to claim 1, it is characterised in that：The end cap（2）And anti-vibration bar（1）It is provided with and is suitable to and alignment pin（3）The through hole of cooperation.
3. ACP1000 antivibratioves bar assembly according to claim 1, it is characterised in that：The end cap（2）And anti-vibration bar（1）End be provided with the screw thread coordinate screwed hole.
4. ACP1000 antivibratioves bar assembly according to claim 1, it is characterised in that：The anti-vibration bar（1）Two ends end is rectangular, and at remaining in a tubular form, four sides of the rectangular portion are provided with chamfering, the end cap（2）Inside it is provided with the rectangular channel coordinated with the rectangular portion；The end cap（2）End be provided with chamfering, the alignment pin（3）End be provided with chamfering.
5. a kind of production method of ACP1000 antivibratioves bar assembly according to claim 1, it is characterised in that the anti-vibration bar（1）Including each chemical composition and its mass percent include：
C ≤0.03%；
P≤0.020%；
S≤0.020%；
Mn≤0.50%；
Si≤0.30%；
Cu≤0.20%；
Cr ≤0.20%；
Mo≤0.20%；
Ni： 28.5~29.5%；
Co ：16.8~17.8%；
Balance of ferrum；The anti-vibration bar grain size is for 6～9 grades and differential within 1.5 grades；
Described production method comprises the steps：
（1）Dispensing → evacuation → applying argon gas → energization → melting → plus rare earth element → power failure → cast, obtain steel ingot after cooling；
（2）Forged steel, hot rolling, multiple cold rolling and intermediate heat-treatment, band bending are in V fonts, finished product heat treatment.
6. production method according to claim 5, it is characterized in that, smelting temperature is controlled more than 1500 DEG C, adds at least one in rare earth element ce, La as catalyst before tapping in melting, and the percentage by weight for accounting for its dispensing gross mass of the rare earth element of addition is 0.05 ~ 0.20%.
7. production method according to claim 6, it is characterised in that the forged steel includes：1280 DEG C of initial forging temperature, final forging temperature are not less than 1150 DEG C, subsequently carry out air cooling and obtain made-up belt；
Made-up belt is carried out into multistage hot deformation, finishing temperature is not less than 1050 DEG C, obtain half into base；
The multiple cold rolling and intermediate heat-treatment includes that, into base finish rolling into the satisfactory band of thickness, intermediate anneal temperature is controlled at 1050～1100 DEG C many cold rolling and intermediate annealings of Jing by partly；
The finished product heat treatment includes band carrying out bright annealing in the range of 940～960 DEG C.
8. production method according to claim 7, it is characterised in that temperature control is at 600～800 DEG C when hot-rolled billet enters stove.
9. production method according to claim 7, it is characterised in that total deformation is controlled 50%～65% when repeatedly cold rolling.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510718562.4A CN106624603A (en) | 2015-10-28 | 2015-10-28 | ACP1000 anti-vibration strip assembly and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510718562.4A CN106624603A (en) | 2015-10-28 | 2015-10-28 | ACP1000 anti-vibration strip assembly and production method thereof |
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| US20080164003A1 (en) * | 2005-03-05 | 2008-07-10 | Jens Kempken | Method and Installation for Producing Light Gauge Steel with a High Manganese Content |
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| CN102794608A (en) * | 2012-08-20 | 2012-11-28 | 丹阳市龙鑫合金有限公司 | Anti-vibration strip component of steam generator of AP1000 nuclear power unit |
| CN202647706U (en) * | 2012-05-14 | 2013-01-02 | 江苏新华合金电器有限公司 | Quake-proof strip for novel nuclear power station steam generator |
| CN103801903A (en) * | 2012-11-08 | 2014-05-21 | 丹阳市龙鑫合金有限公司 | Preparation method for anti-vibration bar assembly of steam generator of CAP1000 nuclear power unit |
| CN103882263A (en) * | 2012-12-19 | 2014-06-25 | 江苏龙鑫特殊钢实业总公司 | Nickel-based alloy for nuclear power steam generator vibration-resisting strips and application thereof |
| CN104313484A (en) * | 2014-11-07 | 2015-01-28 | 江苏天舜金属材料集团有限公司 | Steel for high-strength anti-shaking anti-corrosion reinforcing steel bar and thermal treatment process of steel |
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2015
- 2015-10-28 CN CN201510718562.4A patent/CN106624603A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080164003A1 (en) * | 2005-03-05 | 2008-07-10 | Jens Kempken | Method and Installation for Producing Light Gauge Steel with a High Manganese Content |
| CN202468849U (en) * | 2012-01-17 | 2012-10-03 | 苏州环球集团链传动有限公司 | Anti-abrasion chain |
| CN202647706U (en) * | 2012-05-14 | 2013-01-02 | 江苏新华合金电器有限公司 | Quake-proof strip for novel nuclear power station steam generator |
| CN102794608A (en) * | 2012-08-20 | 2012-11-28 | 丹阳市龙鑫合金有限公司 | Anti-vibration strip component of steam generator of AP1000 nuclear power unit |
| CN103801903A (en) * | 2012-11-08 | 2014-05-21 | 丹阳市龙鑫合金有限公司 | Preparation method for anti-vibration bar assembly of steam generator of CAP1000 nuclear power unit |
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Application publication date: 20170510 |