CN103921083B - Preparation method of the steam generator with antivibration bar assembly - Google Patents
Preparation method of the steam generator with antivibration bar assembly Download PDFInfo
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- CN103921083B CN103921083B CN201410189525.4A CN201410189525A CN103921083B CN 103921083 B CN103921083 B CN 103921083B CN 201410189525 A CN201410189525 A CN 201410189525A CN 103921083 B CN103921083 B CN 103921083B
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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
- B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
- G21D1/006—Details of nuclear power plant primary side of steam generators
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Abstract
A kind of preparation method of nuclear power generating sets steam generator with antivibration bar assembly, the antivibration bar assembly include：The anti-vibration bar of V-shape structure and two of anti-vibration bar two ends end caps are respectively arranged on, anti-vibration bar selects 405 stainless steel materials, end cap to select 690 nickel-bass alloy materials；The preparation method of the antivibration bar assembly, including：The preparation of anti-vibration bar, the preparation of end cap, bend molding, end cap assembling, upsetting pressure, inspection, cleaning and packaging process.The antivibration bar assembly of AP1000 units steam generator of the present invention, simple structure, product quality meet rigorous of the steam generator to anti-vibration bar in nuclear power station, safer during use.The preparation method of this anti-vibration bar, Jing strict preparation section, it is ensured that the technological requirement in nuclear power station to the antivibration bar assembly of steam generator, it is ensured that quality, improve safety.
Description
The application is divisional application, the application number of original application：201210297066.2, the applying date：2012-8-20, invention
Create title《AP1000 Shockproof strip assembly for steam generator of nuclear power unit》.
Technical field
The present invention relates to a kind of preparation method of AP1000 nuclear power generating sets steam generator with antivibration bar assembly.
Background technology
U-shaped heat transfer tube in nuclear power station is that most critical is also most weak link in primary Ioops system pressure border.Once
Tube vibration is destroyed, and must change steam generator, and this certainly will cause the huge waste of manpower, financial resources and event, also increase
Danger of the maintainer by radioactivity irradiation.Therefore, solve steam generator and break to run affairs therefore be the safety that is related to nuclear power station
Property and make 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, and the elbow for generally requiring U-shaped heat-transfer pipe in a vapor generator installs additional
How anti-vibration bar, provide a kind of resistance to shock good antivibration bar assembly, and the preparation method that convenient and simple, precision is high, is this
The technical barrier in field.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of good AP1000 nuclear power generating sets steam generators of resistance to shock
Antivibration bar assembly.
The antivibration bar assembly of the AP1000 unit steam generators of the present invention, which includes：The anti-vibration bar of V-shape structure and point
Two end caps of the other fixed cover located at anti-vibration bar two ends.
The anti-vibration bar selects 405 stainless steel materials；The end cap selects 690 nickel-bass alloy materials, unit steam generation
U-shaped heat transfer tube in device is also nickel-bass alloy material, and the two material is identical, can facilitate and U-shaped heat transfer tube is welded with the end cap
Connect fixation.The characteristics of 690 nickel-bass alloy materials have corrosion resistance strong simultaneously.
The end cap upsetting pressure is fixed in the anti-vibration bar, anti-not-go-end cap antivibration bar assembly and the U-tube assembling,
Occur pulling in welding process.When being embodied as, the central authorities of the end cap and in anti-vibration bar approach end cap two ends part
Flatten.
A kind of preparation method of the antivibration bar assembly, in turn includes the following steps：
A, the operation that anti-vibration bar bar is bent molding：By anti-vibration bar bar, size overall length adds 50mm allowances to carry out on request
Cut-out, set angle bend anti-vibration bar, and the anti-vibration bar after bending is placed on surface grinding machine, carries out reconditioning to bent angle buildup area；
B, the operation of end cap assembling：End cap ethanol is lightly scrubbed into end cap surface and wire cutting endoporus, while will with ethanol
Stainless steel bars is cleaned, after cleaning up, deburring, bite mark, protrusion metal or wedge angle；Again by the end of stainless steel bars
In the endoporus of portion's insertion end cap.
C, the operation of upsetting pressure：（1）Pulling-out force procedure qualification：Assembling is completed and carries out the end cap after upsetting pressure to carry out pulling-out force
Evaluation, makes cap bag under lowest pull, and position is not moved；End pulling-out force at various pressures makes a record, and chooses
Most suitable pressure, as the pressure process parameter in upsetting pressure operation；（2）Upsetting pressure：End cap is put in upsetting pressure mould, hydraulic pressure is used
The position at machine approach end cap two ends respectively in the middle position of opposite end cap and anti-vibration bar carries out upsetting pressure, keeps pressure after pressure positioning
Power off-load after 10 seconds.Upsetting pressure position in anti-vibration bar has everywhere, at approach end cap end each two, carry out for opposite end cap it is spacing,
Anti- not-go-end cap is subjected to displacement in anti-vibration bar.
The preparation method of the anti-vibration bar bar, in turn includes the following steps：
A, induction furnace are smelted：Nickel plate, pure iron, crome metal are placed in sensing furnace bottom when alloy material is smelted, and is loaded in mixture close
It is real, after fusing 70%, add the 2% of total charged material weight slag charge to be made steel, measure molten steel temperature and reach after tapping temperature steel
Water falls down in ladle, pours into steel ingot bar after calm 1-2 minutes, is effectively improved degree of purity, the even tissue of steel alloy
Property, surface, the inherent quality of steel ingot are improved, the performance of steel alloy is improved.
Anti-vibration bar alloy material requires pure；Chemical composition is accurately, uniformly；And have the structural state specified.Using sensing
Stove has a series of unarguable advantages.As it does not have the polluter in the presence of other equipment, it is ensured that it is right to obtain
Most pure metal material for carbon and other impurities；Due to stirring metal bath so as to ensure the uniform of alloy with electric power
Property；Guarantee obtains and keeps temperature required for metal exactly and temperature is uniformly distributed along whole bath temperature；Eliminate
Hot-spot；As its thawing speed is fast, iron loss is few, so as to accurately to obtain regulation alloying component, minimum unit
Biscuiting is damaged and is created favorable conditions；When the refining chemical composition metal different from forehearth is changed, it is with very high mobility.
B, forging：Alloy material steel ingot after induction furnace is smelted is forged in 1150-1220 DEG C of heating and after being incubated
Into the steel billet of 50 × 50mm sizes；Lower step hot rolling blank operation is sent to after surface finish reconditioning.
Forging is that one kind applies pressure to metal stock using metal forming machinery so as to produce plastic deformation to obtain with one
The processing method for determining mechanical performance, definite shape and size forging, can eliminate what metal was produced in smelting process by forging
The defect such as cast condition is loose, optimizes heterogeneous microstructure, simultaneously because complete metal streamline is saved, the mechanical performance one of forging
As better than same material foundry goods.The severe strength member of high, working condition is loaded in associated mechanical, except shape is better simply can
With outside the sheet material of rolling, section bar or weldment, more using forging.In general forging is belonging to the first step of materials processing and is called
" cogging "
C, hot rolling：By anti-vibration bar alloy material 50 × 50mm blanks, at a temperature of being placed in 1050-1100 DEG C heating, insulation after
Hot rolling is carried out, the bar of φ 16mm is rolled into.
Anti-vibration bar alloy material hammer cogging become 50 × 50mm blanks heating by way of by blank roll into it is each
Plant the steel of geometric cross section shape.It is different according to sectional shape shape, it is divided into simple section, compound section or special-shaped section and week
Three kinds of shaped steel such as phase section.
（1）Hot rolling can significantly reduce energy consumption, reduces cost.During hot rolling, plastic deformation is high, and resistance of deformation is low, greatly reduces
The energy expenditure of flow of metal.
（2）Hot rolling can improve the process industrial art performance of metal and alloy, will as-cast condition coarse grain crush, significantly
Crack healing, reduces or eliminates casting flaw, and as-cast structure is changed into the Deformation structure of refinement, puies forward heavy alloyed processability
Energy.
（3）Hot rolling big ingot casting of the anti-vibration bar alloy material by employing, heavy reduction rolling not only increase production effect
Rate, and to improve mill speed, realizing that the serialization of the operation of rolling and automatization create condition.
（4）It is the essential step to form finished product blank that hot-rolled process actually belongs to immediate processing steps.
D, the first heat treatment（Annealing heat-treats）：To ensure the surface quality of anti-vibration bar alloy material to the bar after hot rolling
Surface finish being carried out again, vacuum annealing process being carried out after reconditioning, 16 anti-vibration bar alloy material bars of φ are in 800 DEG C ± 10 of temperature
Carry out heating at DEG C, be incubated.
Annealing heat-treats are divided into full annealing, partial annealing and stress relief annealing.The mechanical property of annealed material can be with
Detected with tension test, it is also possible to detected with hardness test.Intermediate heat-treatment is called heat treatment in advance, is to eliminate upper one
The defect of procedure makes the heat treatment that operation is processed and arranges well below.It is that metal is heated slowly to into uniform temperature,
Enough time is kept, a kind of metal heating processing technology for then cooling down with Reasonable Speed.
The purpose of annealing
1. improve or eliminate iron and steel casting, forging and stamping, rolling and welding process in caused by various tissue defects and
Residual stress, prevents workpiece deformation, cracking.
2. soften workpiece to carry out machining.
3. crystal grain thinning, improves tissue to improve the mechanical performance of workpiece.
4. tissue preparation is performed for finished heat treatment (quenching, tempering).
E, cold-drawn：Soft annealing process is first carried out, and 40 minutes is incubated at a temperature of 720-750 DEG C；Use poly- by deformation requirements
The drawing successively of brilliant mould, and to reconditioning is carried out at crizzle, lower road drawing after reconditioning to zero defect, can be carried out.
Cold-drawn is will to be reprocessed in cold state after the softened annealing of anti-vibration bar alloy bar after hot rolling, with
To all kinds of accurate, high-precision products or the production method of intermediate products.
F, the second heat treatment：Anti-vibration bar alloy bar is pulled to finished-product material to be laid in bell-jar heat-treatment furnace, in hydrogen
Heat treatment is carried out under gas shielded state, temperature is 788-815 DEG C during annealing insulation, is incubated more than 3 hours；Then being less than
28 DEG C/h of rate of cooling slow cooling are to less than 610 DEG C, then are air cooled to room temperature.
Metal heat treatmet is one of important process in machine-building, and compared with other processing technique, heat treatment is typically not
Change the chemical composition of the shape and entirety of workpiece, but by changing the microscopic structure of inside workpiece, or change surface of the work
Chemical composition, give or improve the performance of workpiece.It is characterized in improving the inherent quality of workpiece, and this is generally not meat
What eye can be seen.
There is required mechanical property, physical property and chemical property to make metal works, except reasonable selection material and
Outside various forming technologies, Technology for Heating Processing is often requisite.Iron and steel is most widely used material in mechanical industry, iron and steel
Microscopic structure is complicated, can be controlled by heat treatment, so the heat treatment of iron and steel is the main contents of metal heat treatmet.Separately
Outward, aluminum, copper, magnesium, titanium etc. and its alloy also can change its mechanics, process based prediction model by heat treatment, to obtain not
Same performance.
G, finished product processing：Bar after process is carried out aligning, polished.
The correction carried out to the shape defect of Metal Forming product, is one of important finishing procedure, and cold-drawn material exists
Various shapes defect produced in production process or cooling afterwards and transportation often, the such as bending of section bar tubing,
Wave, wooden dipper song etc., can be such that the defects such as bending are eliminated under external force by various equipment for straightening, reach product qualified
Perfect condition.
（1）Corase grind：The polishing of product is in addition to surface to be made is smooth, it is often more important that should reduce top layer damage as far as possible
Wound.Every one branner sequence must be driven off the deformation layer (deformation that front one procedure should at least produced that front one procedure is caused
Layer is reduced to the deformation layer depth of this procedure generation), rather than only the polishing scratch of front one procedure is removed；Meanwhile, the road
Operation itself should accomplish to reduce damage as far as possible, in order to carry out next process.The deformation that last one branner sequence is produced
Layer depth should be very shallow, it is ensured that can remove in lower one polishing process.This process is it is noted that prevent metal from too generating heat.
（2）Fine grinding：The purpose of fine grinding is to eliminate the deeper polishing scratch stayed during corase grind, is that next step polishing is laid a solid foundation.
Fine grinding is typically carried out on sand paper, sand paper point waterproof abrasive paper and abrasive paper for metallograph.Generally waterproof abrasive paper is that SiC abrasive materials are water insoluble, gold
The abrasive material of phase sand paper has Alundum, carborundum, ferrum oxide etc., and property is extremely hard, in many arris, with good machinability
Can, manual wet grinding or mechanical wet grinding can be carried out as lubricant with water during fine grinding, granularity is usually used for 240,320,400,600 4
It is polished by planting after waterproof abrasive paper is polished, for softer metal, re-polishing after the thinner abrasive paper for metallograph polishing of application.Sand
Paper downward-sloping outwardly (from terms of operator direction), is pasted onto when grinding on plate glass, will be sample flour milling flat after on sand paper,
Straight line leaves sand paper when a push-back is returned forward, this to be repeated, until old polishing scratch all disappears, the side of obtaining on whole flour milling
Stop to consistent uniform new polishing scratch side, before often changing one sand paper, it is necessary to first wash sample and sand grains on hand with water, and wipe
It is dry, then sample is rotated by 90 ° and is ground on secondary sand paper.The water flowed during use is ceaselessly flow through from coated abrasive surface, in time
Most abrasive dusts and the abrasive particle for coming off are washed away on ground.So during whole polishing operation, the sharp corners of abrasive particle are all the time
Contact with the surface of sample, keep the ablation which is good.Another advantage of wet grinding is that the cooling effect of water can be reduced
The frictional heat produced in specimen surface during polishing, it is to avoid microscopic structure changes.Whole polishing operation can be on same equipment
Complete.
The preparation method of the end cap, in turn includes the following steps：Induction furnace smelting, forging, hot rolling, heat treatment, end cap
Vehicle Processing；（Require supplementation with effect, purpose or the technique effect of each operation）
The induction furnace is smelted：Nickel plate, pure iron, crome metal are placed in sensing furnace bottom when alloy material is smelted, and is loaded in mixture
It is closely knit, after fusing 70%, add the 2% of total charged material weight slag charge to be made steel, measure molten steel temperature and reach handle after tapping temperature
Molten steel falls down in ladle, pours into steel ingot after calm 1-2 minutes.
Anti-vibration bar alloy material requires pure；Chemical composition is accurately, uniformly；And have the structural state specified.Using sensing
Stove has a series of unarguable advantages.As it does not have the polluter in the presence of other equipment, it is ensured that it is right to obtain
Most pure metal material for carbon and other impurities；Due to stirring metal bath so as to ensure the uniform of alloy with electric power
Property；Guarantee obtains and keeps temperature required for metal exactly and temperature is uniformly distributed along whole bath temperature；Eliminate
Hot-spot；As its thawing speed is fast, iron loss is few, so as to accurately to obtain regulation alloying component, minimum unit
Biscuiting is damaged and is created favorable conditions；When the refining chemical composition metal different from forehearth is changed, it is with very high mobility.
The forging:By by induction furnace smelt after anti-vibration bar alloy material steel ingot 1150-1220 DEG C heat and
The steel billet of 50 × 50mm sizes is forged into after insulation；Lower step hot rolling blank operation is sent to after surface finish reconditioning.
Forging is that one kind applies pressure to metal stock using metal forming machinery so as to produce plastic deformation to obtain with one
The processing method for determining mechanical performance, definite shape and size forging, can eliminate what metal was produced in smelting process by forging
The defect such as cast condition is loose, optimizes heterogeneous microstructure, simultaneously because complete metal streamline is saved, the mechanical performance one of forging
As better than same material foundry goods.The severe strength member of high, working condition is loaded in associated mechanical, except shape is better simply can
With outside the sheet material of rolling, section bar or weldment, more using forging.In general forging is belonging to the first step of materials processing and is called
" cogging "
The hot rolling：By anti-vibration bar alloy material 50 × 50mm blanks, at a temperature of being placed in 1200 ± 10 DEG C heating, insulation after
Hot rolling is carried out, the bar of 13 × 25mm of φ is rolled into.
Anti-vibration bar alloy material hammer cogging become 50 × 50mm blanks heating by way of by blank roll into it is each
Plant the steel of geometric cross section shape.It is different according to sectional shape shape, it is divided into simple section, compound section or special-shaped section and week
Three kinds of shaped steel such as phase section.
（1）Hot rolling can significantly reduce energy consumption, reduces cost.During hot rolling, plastic deformation is high, and resistance of deformation is low, greatly reduces
The energy expenditure of flow of metal.
（2）Hot rolling can improve the process industrial art performance of metal and alloy, will as-cast condition coarse grain crush, significantly
Crack healing, reduces or eliminates casting flaw, and as-cast structure is changed into the Deformation structure of refinement, puies forward heavy alloyed processability
Energy.
（3）Hot rolling big ingot casting of the anti-vibration bar alloy material by employing, heavy reduction rolling not only increase production effect
Rate, and to improve mill speed, realizing that the serialization of the operation of rolling and automatization create condition.
（4）It is the essential step to form finished product blank that hot-rolled process actually belongs to immediate processing steps.
The priority of the heat treatment includes：（1）Solution treatment：13 × 25mm of end cap material φ materials after hot rolling are tiled
The solution treatment in bell hydrogen resistance furnace gas shielded stove；（2）Ageing Treatment：Bar after solution treatment is also placed in hydrogen shield stove
Carry out Ageing Treatment.
Solution treatment is equal to obtain uniform supersaturated solid solution in order to dissolve carbide in matrix, γ ', when being easy to
Again the hardening constituents such as granule is tiny, be evenly distributed carbide and γ ' are separated out during effect, while eliminating what is produced due to cold and hot working
Stress, makes alloy that recrystallization to occur.Secondly, solution treatment is in order to obtain suitable grain size, to ensure that it is compacted that alloy high-temp resists
Become performance.The temperature range of solution treatment about between 980 ~ 1250 DEG C, mainly according to mutually separating out in each alloy and dissolve
Rule and use requirement selecting, to ensure the necessary precipitation condition of main hardening constituent and certain grain size.For long-term height
The alloy that temperature is used, it is desirable to have preferable high-temperature and durable and croop property, should select higher solid solubility temperature larger to obtain
Grain size；For middle temperature is used and requires preferable room temperature hardness, yield strength, tensile strength, impact flexibility and fatigue strength
Alloy, relatively low solid solubility temperature can be adopted, it is ensured that less grain size.During higher temperature solid solution, various precipitated phases are all progressively
Dissolving, while crystal grain is grown up；During low temperature solution treatment, the dissolving of only not main hardening constituent, and may have the analysis of some phases
Go out.The alloy low for degree of supersaturation, generally selects rate of cooling faster；The alloy high for degree of supersaturation, it is usually empty
Cool down in gas.
Ageing Treatment：Refer to alloy workpiece Jing solution treatment, cold plastic deformation or casting, after forging, put in higher temperature
Put or room temperature keeps its performance, shape, the Technology for Heating Processing of size time to time change.According to by workpiece heat to higher temperatures
Degree, and the short period carry out the aging treatment process of Ageing Treatment, referred to as artificial aging is processed, if by workpiece be placed on room temperature or
Long storage time under natural conditions and the aging phenomenon that occurs, referred to as natural aging treatment.The third mode be oscillating aging from
The eighties is not then heating also time-consuming unlike natrual ageing situation from the beginning of stepping into practical stage, vibration stress relief treatment
Under, it is released its internal stress with the vibration for applying certain frequency to work, so as to reach the purpose of timeliness.Ageing Treatment
Purpose, eliminates the internal stress of workpiece, stabilizing tissue and size, improves mechanical performance etc..
In machinery production, in order to stablize casting dimension, often foundry goods is placed at room temperature for a long time, just then cut
Processing.This measure is also referred to as timeliness.But this timeliness is not belonging to metal heating processing technology.
The end cap Vehicle Processing：φ 13 × 25mm materials after Ageing Treatment are machined, required size is processed into
End cap.
The technique effect of the present invention：The antivibration bar assembly of AP1000 units steam generator of the present invention, structure letter
Single, product quality meets rigorous of the steam generator to anti-vibration bar in nuclear power station, safer during use.This anti-vibration bar
Preparation method, Jing strict preparation section, it is ensured that the technological requirement in nuclear power station to the antivibration bar assembly of steam generator, protect
Quality has been demonstrate,proved, safety has been improve.The end cap upsetting pressure is fixed in the anti-vibration bar, and anti-not-go-end cap is in antivibration bar assembly and institute
State the assembling of U-tube, occur pulling in welding process.When being embodied as, the central authorities of the end cap and in anti-vibration bar it is neighbouring
Flatten the part at end cap two ends.
Description of the drawings
Fig. 1 is the structural representation of the antivibration bar assembly of AP1000 units steam generator of the present invention, accompanying drawing mark
Note：1-- anti-vibration bars, 2-- ends cap.
Specific embodiment
Embodiment 1
Such as Fig. 1, the antivibration bar assembly of the AP1000 unit steam generators of the present embodiment, which includes：V-shape structure it is anti-
Shake bar 1 and respectively two end caps 2 of the fixed cover located at anti-vibration bar two ends.
The anti-vibration bar 1 selects 405 stainless steel materials（SA-479 TYPE405）；The end cap 2 selects 690 nickel-base alloys
Material（SB-166 UNS N06690）.
Approach end cap two ends in the central authorities of the end cap 2 and anti-vibration bar 1 are crushed everywhere.Locate in anti-vibration bar 1
It is symmetrical at two flattenings of end cap end.
The preparation method of above-mentioned antivibration bar assembly, including：The preparation of anti-vibration bar bar, the preparation of end cap, anti-vibration bar bar
Bend the operations such as molding, end cap assembling, upsetting pressure, inspection, cleaning and packaging.
Described anti-vibration bar bar bends molding：By anti-vibration bar bar, size overall length adds 50mm allowances to be cut on request
Disconnected, set angle bends anti-vibration bar, and the anti-vibration bar after bending is placed on surface grinding machine, and reconditioning is carried out to bent angle buildup area to drawing
Require.
Described end cap assembling：End cap ethanol is lightly scrubbed into the endoporus of end cap surface and wire cutting molding, while using wine
Stainless steel bars is cleaned by essence, after cleaning up, deburring, bite mark, protrusion metal or wedge angle；Again stainless steel bar is inserted
Enter and hold cap, alignment angle is assembled.
Described upsetting pressure includes：（1）Pulling-out force procedure qualification：Assembling is completed and carries out the end cap after upsetting pressure to pull
Power is evaluated, and makes cap bag under the pulling force of minimum 4448N, and position is not moved；End pulling-out force at various pressures is carried out
Record, chooses most suitable pressure, as the pressure process parameter in upsetting pressure operation；（2）Upsetting pressure：End cap is put into upsetting pressure mould
In, upsetting pressure is carried out with the position at the approach end cap two ends on the hydraulic press respectively middle position of opposite end cap and anti-vibration bar, pressure is fixed
Pressure off-load after 10 seconds is kept behind position, it is ensured that after the cap upsetting pressure of end, meet drawing requirement.Upsetting pressure position in anti-vibration bar has everywhere, adjacent
At proximal cap end each two, carry out spacing for opposite end cap, anti-not-go-end cap is subjected to displacement in anti-vibration bar.
The inspection：（1）Flatness detection, is measured with clearance gauge in detection platform；（2）Size detection, with thousand points of digital display
Chi measures product；（3）Angle is detected, is measured with digital display angle measuring instrument；（4）Visual detection, is visually examined piece by piece to workpiece
Survey, it is ensured that surface zero defect, surface roughness roughness measuring instrument crawl measurement；（5）Surface finish measurement, with slightly
Rugosity detector or control sample block are measured；All size detection results should meet drawing requirement.
The cleaning：Bar is cleaned by relevant regulations, it is ensured that finished surface does not have rust staining, dust and other pollutions
Thing,（1）The metal of sulfur, lead, hydrargyrum, cadmium and other low melting points, and their alloy and compound, halogen-containing material are forbidden
For processes such as the preparation of anti-vibration bar, test, inspection and packagings；（2）Lubricant, cuttings liquid and abluent do not contain above-mentioned thing yet
Matter；Molykote, politef and other poly- fluorine materials are also prohibitted the use of.
Embodiment 2
The preparation method of the anti-vibration bar bar in above-described embodiment 1, successively including following operation：Induction furnace is smelted, melting
Analysis, forging, hot rolling, the first heat treatment, performance test（Stretching, hardness）And it is metal lographic examination, product analyses, cold-drawn, second hot
Process, finished product is processed, performance test（Stretching, hardness）And grain size inspection, dimension control, labelling, cleaning.
Described induction furnace is smelted：Nickel plate, pure iron, crome metal are placed in sensing furnace bottom when alloy material is smelted, and is mixed
Fill closely knit, after fusing 70%, add the 2% of total charged material weight slag charge to be made steel, measure after molten steel temperature reaches tapping temperature
Molten steel is fallen down in ladle, after calm 1-2 minutes, steel ingot bar is poured into.Every 40-50kg of steel ingot weight, steel ingot diameter microcephaly
140mm, major part 155mm.
Described heat analysis includes：（1）Sampling：Away from car beyond the head of ingot, ingot tail 20mm scopes or dig chemical analyses sample
Product；（2）The chemical analysis that a sample for chemical analysis determines every stove steel are taken to each heat (batch) number, and is carried out by content standard data
Screening.Melting chemical analysis should meet following table requirement：
Described forging:Steel ingot after will be analysis qualified is forged into the steel of 50 × 50mm sizes at 1150-1220 DEG C
Base；
（1）Forge Heating thermometer：
（2）Forging：Forging compression ratio is:4-6；Forging size：50×50mm；Square billet major part cuts off more than 100mm, microcephaly
Excision more than 50mm；Forging stock is surface-treated：Forging stock surface strips off the skin reconditioning, removes the surface defects such as surface wrinkles crackle pipe.
Described hot rolling：Hot rolling is carried out at a temperature of steel billet is placed in 1050-1100 DEG C, the bar of φ 16mm is rolled into, heat
The crackle of surface quality to be checked, folded, scabbed, being mingled with by root after rolling cooling, and it is clean thoroughly to polish；
（1）Billet heating temperature table is as follows：
（2）Rolling：Adjustment work is straight to the outward appearance of rolled products, is rolled into the silk material of φ 16mm；Will after milling material cooling
The crackle of surface quality is checked, folded, scabbed, being mingled with by root, and it is clean thoroughly to polish；Rolling ratio：≥5.
The first described heat treatment：Vacuum annealing process is carried out to the bar after hot rolling, temperature is maintained at 800 ± 10 DEG C；
Described performance test includes：（1）The each batch number of hot rolled rod after heat treatment is appointed and takes one group of sample；（2）
Tension test, hardness test, Metallographic Analysis and product analyses are carried out respectively to sample, substandard product is excluded；
1. stretch test result should meet following table requirement：
As bar≤25mm, the longitudinal axis of sample are consistent with the center of bar, and the useful part of sample is apart from bar
The distance of heat treated end cannot be less than the diameter of bar.
2. hardness test should meet：
Hardness test should check the hardness of bar in the middle part of bar center to face.
3. Metallographic Analysis should meet：
4. product analyses：Material product analysis is done in the two ends sampling of tensile sample, analysis result should meet：
5. retrial and again heat treatment：
If the stretch test result of 5.1 bars is undesirable, two can be cut in the adjacent parts of failed test sample
Additional sample carries out tension test, only can check and accept when two additional specimen test results are satisfied by requiring；
Cause mechanical property unqualified if 5.2 any a collection of bar heat treatments are improper, can be to the batch of material again
Heat treatment, but another warm number of processing is not to be exceeded twice；Again, after heat treatment, technical conditions regulation is carried out to the batch of material
All inspections（Except the inspection of chemical analysis and non-metallic inclusion）；All inspections all should meet the requirement of this technology condition.
Described cold-drawn includes：（1）Soft annealing process is first carried out, and 40 minutes is incubated at a temperature of 720-750 DEG C；（2）
By deformation requirements glomerocryst mould successively drawing, and to reconditioning is carried out at crizzle, lower road after reconditioning to zero defect, can be carried out
Drawing.
Draw during cold-drawn deflection be 12.5 → φ of φ 16 → φ, 14 → φ 11 → 4.8 × 12.8 → 4.4 × 12.5 →
4.028×12.19。
Soft annealing resolving system is as follows：
The second described heat treatment：Finished-product material will be pulled to be laid in bell-jar heat-treatment furnace, in hydrogen shield state
Under carry out heat treatment, annealing holding temperature is 788-815 DEG C, heat treatment temperature and other require that according to the form below requirement is carried out：
Described finished product processing：Cold working operation, the thickness after processing such as carry out aligning to the bar after heat treatment, polish
Degree, width, torsion resistance, linearity equidimension should meet following table requirement：
Described performance test：Mechanical property test, hardness test, grain size inspection are carried out to bar, to being unsatisfactory for skill
The bar that art condition is required is excluded.
1. mechanical property test should meet：
2. hardness test should meet：
3. grain size inspection：
If the mechanical property of bar does not meet technical requirements, can carry out in the double sampling of the sample adjacent parts multiple
Examination, retrial result all should meet the specification requirement.
Described dimension control includes：（1）Visual inspection：To every material surface by Zhi Jinhang visual inspections, it is desirable to flawless,
The defects such as scuffing, bar do not allow to carry out any repair by welding, and its surface roughness is checked by Zhi Jinhang, and suspicious area is needed
Increase and check, measure result and answer Ra≤1.6 μm；（2）Dimensional gaughing：The material for taking out 5% carries out dimensional gaughing, it is ensured that scantling
Meet the tolerance of 4.028 ± 0.013 × (12.19).
Described labelling：Mark should be accurately made on every material or is tied on a label, write maker's name, material board exactly
Number and specification；Hearth number, lot number and piece number；Contract number or order number.
Described cleaning：Bar is cleaned by relevant regulations, it is ensured that finished product Surface of Rod Bar do not have rust staining, dust and its
His pollutant；Rod iron can not contact the material for having harm to itself and integrity.The incompatibility material of main metal have lead,
Zinc, copper, aluminum, cadmium, stannum, hydrargyrum, sulfur, arsenic, boron and general low-melting alloy and its their compound, in addition, due to containing
The degraded of chlorine plastics and the fluoride, sulfate, chloride and the acid chloride that produce are one potential dangerous, cautiously should select
Select adhesive tape, marking pen, couplant, penetrating agent and coating；If it is desired that use milling tools, first have to guarantee milling tools not by
Pollution.
Embodiment 3
The preparation method of the end cap in above-described embodiment 1, successively including following operation：It is induction furnace smelting, electroslag refining, molten
Refining analysis, forging, ultrasound investigation, hot rolling, heat treatment, performance test, product analyses, end cap Vehicle Processing, dimension control, mark
Note, cleaning.
Described induction furnace is smelted：Nickel plate, pure iron, crome metal are placed in sensing furnace bottom when alloy material is smelted, and is mixed
Fill closely knit, after fusing 70%, 2% slag charge that addition always feeds intake is made steel, measure molten steel temperature and reach after tapping temperature steel
Water falls down in ladle, and steel ingot bar, every 40-50kg of steel ingot weight, steel ingot diameter microcephaly are poured into after calm 1-2 minutes
140mm, major part 155mm.
Described electroslag refining：Alloy material just will can effectively improve steel alloy through electroslag refining after smelting
Degree of purity, structural homogenity, improve surface, the inherent quality of steel ingot, improve the performance of steel alloy.When electroslag refining is finished,
Feeding is carried out, after feeding 3-5 minutes, >=3 minutes de- ingots is cooled down.Then carry out ESR ingot surface treatment：Surface strips off the skin, reconditioning.
Described heat analysis includes：（1）Sampling：Away from car beyond the head of ingot, ingot tail 20mm scopes or dig chemical analyses sample
Product；（2）A sample for chemical analysis is taken to each heat (batch) number, is pressed《ASTM E38 nickel-chromes and nickel-chromium-ferro alloy chemical analyses
Method》The test method of requirement carries out Chemical bath deposition to material, and is screened by content standard data, and melting chemistry should
Meet：
Described forging：Steel ingot after will be analysis qualified is forged into 50 × 50mm sizes at a temperature of 1240-1260 DEG C
Steel billet.
1. steel ingot to be made annealing treatment before forging, heat treatment temperature according to the form below is carried out：
2. deformation technique：Forging compression ratio is:4-6；Square billet major part cuts off more than 100mm, microcephaly excision more than 50mm；Forging
Square billet size is made for 50 × 50mm；Forging stock is surface-treated：Forging stock surface strips off the skin reconditioning, removes the surfaces such as surface wrinkles crackle pipe
Defect.
Described ultrasound investigation：By the square rod of the reconditioning that strips off the skin by《Bar Dynamic Non-Destruction Measurement condition》Specified in detect
Method and acceptance criteria carry out ultrasound examination.
Described hot rolling：Hot rolling is carried out at a temperature of square billet is placed in 1200 DEG C or so, the material of 13 × 25mm of φ is rolled into,
Hot-rolled temperature deviation is less than 10 degree, after hot rolling cooling will by root check surface quality crackle, fold, scab, being mingled with etc. it is scarce
Fall into, and it is clean thoroughly to polish；
1. the square billet after forging first is made annealing treatment before hot rolling, annealing temperature such as following table：
2. roll control：End cap material is rolled into into 13 × 25mm of φ；Will be by root check table facial cleft after milling material cooling
Stricture of vagina, the defect such as fold, scab, being mingled with, and cut off or thoroughly polishing it is clean；Rolling is than being >=5.
Described heat treatment includes：1. solution treatment：13 × 25mm of end cap material φ after hot rolling is laid in into bell-jar
Solution treatment in hydrogen shield stove, heat treatment temperature such as following table：
Wherein, holding temperature deviation is less than ± 10 DEG C.
2. Ageing Treatment：Bar after solution treatment must carry out Ageing Treatment, and Ageing Treatment also should be in hydrogen shield stove
In carry out, heat treatment temperature is：
| Steel grade | Specification | Heating-up temperature DEG C | Temperature retention time（h） | The type of cooling |
| SB-166 UNS N06690 | φ13×25mm | 704～732 DEG C | 8-12h | Air cooling |
Wherein, Ageing Treatment is not to be exceeded ± 10 DEG C in the temperature deviation of soak.
3. solid solution and aging strengthening model record should be listed in certificate of quality file, and heat treatment record should include holding temperature
And its deviation, temperature retention time, the rate of heat addition, heating atmosphere and the type of cooling.
Described performance test includes：
1. sample：Each batch number times takes a sample and does mechanical property test, and the longitudinal axis of tensile sample is parallel to bar
Axially.The useful part of tensile sample is at least one times of diameter of rod from bar end；The longitudinal axis location of tensile sample
For bar center；Sample has enough length, to intercept all test consumptions and can such as hardness specimens, metallographic specimen
Sample needed for energy retrial.
2. tension test should meet：
Wherein, tension test adopts gauge length 50mm, the standard specimen of diameter 12.5mm.
3. Metallographic Analysis：Metallographic Analysis is done in the sample close position sampling of tension test, Metallographic Analysis examination criteria is：
4. macro-erosion test：Extraction one is appointed to carry out macroetch test per batch, should be transversal in the two ends crop of bar
Facial position is tested, and with the naked eye or by less than 10 times magnifieres is evaluated, is not allow for shrinkage cavity, cavity, crackle, slag inclusion
And the defect such as pin hole.
5. Huey test：Every batch of bar should take one group on any one bar after Ageing Treatment（Two）Sample
Huey test is carried out, sample is taken in stretching adjacent locations, sample answers elder generation's Jing sensitized treatments, sensitized treatment system is 675 DEG C
± 5 DEG C be incubated 1 hour, sample corrosion rate should be less than 20mdd (milligram/square decimeter. day).
6. product analyses：Near tensile sample, each stove times takes the product analyses that a sample does material, product point
Analysis result should meet：
Described end cap Vehicle Processing：φ 13 × 25mm materials after Ageing Treatment are made a service test, and to qualified
Material is machined, and is processed into φ 22.86 ± 0.05, long 50.8 ± 0.07 end cap product on request.
Described dimensional gaughing：1st, to every material surface by Zhi Jinhang visual inspections, end cap is not allow for indentation, burr, indulges
Split, metal is heaved.2nd, dimensional gaughing is carried out to material, 5% is should be greater than per the inspection quantity of stove material.
Described labelling：Mark should be accurately made on every material or is tied on a label, should be included：Job number, material board
Number and specification, bar piece number, hearth number, heat treatment heat (batch) number, bar maker's name.
Described cleaning:Bar is cleaned by relevant regulations, it is ensured that finished product end cap surface do not have rust staining, dust and
Other pollutant.
Claims (1)
1. a kind of preparation method of AP1000 Shockproof strip assembly for steam generator of nuclear power unit, it is characterised in that：The anti-vibration bar
Component includes：The anti-vibration bar of V-shape structure and respectively end cap of the fixed cover located at anti-vibration bar two ends；The anti-vibration bar selects 405
Stainless steel material；The end cap selects 690 nickel-bass alloy materials；
The preparation method of described antivibration bar assembly, in turn includes the following steps：
A, the operation that anti-vibration bar bar is bent molding：Anti-vibration bar bar is bent into anti-vibration bar by set angle, it is anti-after bending
The bar that shakes is placed on surface grinding machine, carries out reconditioning to bent angle buildup area；
B, the operation of end cap assembling：End cap ethanol is lightly scrubbed into end cap surface and wire cutting endoporus, while with ethanol by antivibration
Bar bar is cleaned, after cleaning up, deburring, bite mark, protrusion metal or wedge angle；Again the end of anti-vibration bar bar is inserted
Enter in holding the endoporus of cap；
C, the operation of upsetting pressure：End cap is put in upsetting pressure mould, the middle position of opposite end cap is distinguished and to anti-vibration bar with hydraulic press
On approach end cap end each two at carry out upsetting pressure；
The preparation method of the anti-vibration bar bar in turn includes the following steps：
A, induction furnace are smelted：Nickel plate, pure iron, crome metal are placed in sensing furnace bottom when alloy material is smelted, after fusing 70%, plus
The slag charge for entering the 2% of total charged material weight is made steel, and measures after molten steel temperature reaches tapping temperature molten steel to fall down in ladle, town
Steel ingot bar is poured into after quiet 1-2 minutes；
B, forging：Alloy material steel ingot after induction furnace is smelted is forged into into 50 in 1150-1220 DEG C of heating and after being incubated
The steel billet of × 50mm sizes, and carry out surface finish, reconditioning；
C, hot rolling：At a temperature of above-mentioned steel billet is placed in 1050-1100 DEG C heating, insulation after carry out hot rolling, be rolled into φ 16mm's
Bar；
D, the first heat treatment：Carry out surface finish to the bar after hot rolling again, after reconditioning, carry out vacuum annealing process, then
Above-mentioned bar at 800 DEG C ± 10 DEG C of temperature is carried out heating, is incubated；
E, cold-drawn：Soft annealing process is first carried out, and then 40 minutes is incubated at a temperature of 720-750 DEG C；Carry out by deformation requirements
Drawing；
F, the second heat treatment：The bar of above-mentioned cold drawn forming is laid in bell-jar heat-treatment furnace, under hydrogen shield state
Heat treatment is carried out, temperature is 788-815 DEG C during annealing insulation, is incubated more than 3 hours；Then with cold less than 28 DEG C/h
But speed slow cooling is to less than 610 DEG C, then is air cooled to room temperature.
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| CN201410189525.4A CN103921083B (en) | 2012-08-20 | 2012-08-20 | Preparation method of the steam generator with antivibration bar assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210297066.2A CN102794608B (en) | 2012-08-20 | 2012-08-20 | Anti-vibration strip component of steam generator of AP1000 nuclear power unit |
| CN201410189525.4A CN103921083B (en) | 2012-08-20 | 2012-08-20 | Preparation method of the steam generator with antivibration bar assembly |
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| CN201210297066.2A Division CN102794608B (en) | 2012-08-20 | 2012-08-20 | Anti-vibration strip component of steam generator of AP1000 nuclear power unit |
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| CN1099473A (en) * | 1993-07-09 | 1995-03-01 | 法玛通公司 | Heat exchanger including a bundle of tubes which are bent into A U and anti-vibration bars between the bent parts of the tubes |
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| CN101851714A (en) * | 2010-05-27 | 2010-10-06 | 江苏新华合金电器有限公司 | Shockproof strip end-plate material of vapor generator of nuclear power plant and preparation method thereof |
| CN202037426U (en) * | 2011-04-01 | 2011-11-16 | 上海电气核电设备有限公司 | Auxiliary anti-vibration strip assembly tooling for steam generator tube bundle |
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