CN103934649B - The nuclear power generating sets steam generator preparation method of anti-vibration bar assembly - Google Patents
The nuclear power generating sets steam generator preparation method of anti-vibration bar assembly Download PDFInfo
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- CN103934649B CN103934649B CN201410189617.2A CN201410189617A CN103934649B CN 103934649 B CN103934649 B CN 103934649B CN 201410189617 A CN201410189617 A CN 201410189617A CN 103934649 B CN103934649 B CN 103934649B
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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
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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
- Y02E30/30—Nuclear fission reactors
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Abstract
A kind of preparation method of nuclear power generating sets steam generator anti-vibration bar assembly, described anti-vibration bar assembly comprises: the anti-vibration bar of V-shape structure and be located at two end caps at anti-vibration bar two ends respectively, anti-vibration bar selects 405 stainless steel materials, and end cap selects 690 nickel-bass alloy materials; The preparation method of described anti-vibration bar assembly, comprising: the preparation of anti-vibration bar, the preparation of end cap, bend shaping, end cap assembling, upsetting pressure, inspection, clean and packaging process.The anti-vibration bar assembly of AP1000 unit steam generator of the present invention, structure is simple, and product quality meets in nuclear power station that steam generator is to the rigorous of anti-vibration bar, safer during use.The preparation method of this anti-vibration bar, through strict preparation section, ensure that the technological requirement to the anti-vibration bar assembly of steam generator in nuclear power station, ensure that quality, improve security.
Description
The application is divisional application, the application number of original application: 201210297066.2, the applying date: 2012-8-20, invention and created name " the anti-vibration bar assembly of AP1000 nuclear power generating sets steam generator ".
Technical field
The present invention relates to a kind of preparation method of AP1000 nuclear power generating sets steam generator anti-vibration bar assembly.
Background technology
U-shaped heat transfer tube in nuclear power station is that in primary Ioops system pressure border, most critical is also the weakest link.Once tube vibration destroys, must change steam generator, this certainly will cause the huge waste of manpower, financial resources and event, too increases the danger of maintainer by radioactivity irradiation.Therefore, solve steam generator break run affairs thus be related to nuclear power station security and make nuclear power station have the key issue of competitiveness and vitality.
The root that vibration produces will be eliminated as far as possible, the elbow of general needs U-shaped heat-transfer pipe in a vapor generator installs anti-vibration bar additional, how the anti-vibration bar assembly that a kind of resistance to shock is good is provided, and convenient and simple, that precision is high preparation method, be the technical barrier of this area.
Summary of the invention
The technical problem to be solved in the present invention is to provide the anti-vibration bar assembly of the good AP1000 nuclear power generating sets steam generator of a kind of resistance to shock.
The anti-vibration bar assembly of AP1000 unit steam generator of the present invention, it comprises: the anti-vibration bar of V-shape structure and respectively fixed cover are located at two end caps at anti-vibration bar two ends.
Described anti-vibration bar selects 405 stainless steel materials; Described end cap selects 690 nickel-bass alloy materials, and the U-shaped heat transfer tube in unit steam generator is also nickel-bass alloy material, and the two material is identical, can conveniently U-shaped heat transfer tube and described end cap be welded and fixed.690 nickel-bass alloy materials have the strong feature of corrosion resistance simultaneously.
Described end cap upsetting pressure is fixed in described anti-vibration bar, prevents end cap from occurring pulling in the assembling, welding process of anti-vibration bar assembly and described U-tube.During concrete enforcement, the central authorities of described end cap and in anti-vibration bar the part at contiguous end cap two ends flatten.
A preparation method for described anti-vibration bar assembly, in turn includes the following steps:
A, anti-vibration bar bar is bent shaping operation: by anti-vibration bar bar on request size overall length add 50mm allowance and cut off, set angle bends anti-vibration bar, and the anti-vibration bar after bending is placed on surface grinding machine, carries out reconditioning to bent angle buildup area;
The operation of B, end cap assembling: end cap alcohol is dabbed and washes end cap surface and Linear cut endoporus, with alcohol, stainless steel bars is cleaned simultaneously, after cleaning up, deburring, bite mark, protrusion metal or wedge angle; Again the end of stainless steel bar is inserted in the endoporus of cap end.
The operation of C, upsetting pressure: (1) pulling-out force procedure qualification: carry out pulling-out force evaluation to having assembled and having carried out the end cap after upsetting pressure, make cap bag under lowest pull, 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: cap end is put into upsetting pressure mould, carries out upsetting pressure to the position at the contiguous end cap two ends on the middle position of end cap and anti-vibration bar respectively with hydraulic press, and pressure keeps pressure off-load after 10 seconds behind location.Upsetting pressure position in anti-vibration bar has everywhere, and contiguous each two places, end cap end, for carrying out spacing to cap end, prevent end cap to be subjected to displacement in anti-vibration bar.
The preparation method of described anti-vibration bar bar, in turn includes the following steps:
A, induction furnace are smelted: bottom induction furnace, place nickel plate, pure iron, crome metal when alloy material is smelted, and load in mixture closely knit, after fusing 70%, the slag charge adding 2% of total charged material weight is made steel, recording after molten steel temperature reaches tapping temperature falls down molten steel in ladle, pours into steel ingot bar, effectively improve the degree of purity of steel alloy, structural homogenity after calm 1-2 minute, improve the surface of steel ingot, inherent quality, improve the performance of steel alloy.
Anti-vibration bar alloy material requires pure; Chemical composition accurately, evenly; And have the structural state of specifying.Induction furnace is adopted to have a series of unarguable advantage.Because it not to have in other equipment existing pollution sources, can ensure to obtain concerning metal material the purest carbon and other impurity; Metal bath is stirred thus the uniformity ensureing alloy owing to having electric power; Ensure obtain exactly and keep the temperature required for metal and temperature is uniformly distributed along whole bath temperature; Eliminate hot-spot; Because its thawing speed is fast, iron loss is few, thus is obtain regulation alloying component accurately, and minimum melting loss of elements creates favorable conditions; When changing the refining chemical composition metal different from forehearth, it has very high mobility.
B, forging: the steel billet that the alloy material steel ingot after being smelted by induction furnace is heated at 1150-1220 DEG C and is forged into 50*50mm size after insulation; By delivering to lower step hot rolling blank operation after surface finish reconditioning.
Forging is that one utilizes metal forming machinery to apply pressure to metal stock, it is made to produce plastic deformation to obtain the processing method with certain mechanical performance, definite shape and size forging, the defects such as cast condition that metal produces in smelting process is loose can be eliminated by forging, optimize heterogeneous microstructure, simultaneously owing to saving complete metal streamline, the mechanical performance of forging is generally better than the foundry goods of same material.The strength member that in associated mechanical, load is high, condition of work is severe, except the sheet material of the better simply available rolling of shape, section bar or weldment, adopts forging more.In general forging is that the first step belonging to materials processing is called " cogging "
C, hot rolling: by anti-vibration bar alloy material 50 × 50mm blank, carry out hot rolling after being placed in heating at 1050-1100 DEG C of temperature, insulation, be rolled into the bar of ф 16mm.
The steel of the various geometric cross section shapes that blank rolls into by the mode that anti-vibration bar alloy material becomes the heating of 50 × 50mm blank by hammer cogging.Different according to sectional shape shape, be divided into simple section, compound section or three kinds of shaped steel such as special-shaped section and die rolled section.
(1) hot rolling significantly can reduce energy consumption, reduces costs.During hot rolling, plastic deformation is high, and resistance of deformation is low, greatly reduces the energy ezpenditure of flow of metal.
(2) hot rolling can improve the process industrial art performance of metal and alloy, and the coarse grain by as-cast condition is broken, and remarkable crack healing, reduces or eliminates casting flaw, as-cast structure is changed into the Deformation structure of refinement, puies forward heavy alloyed processing characteristics.
(3) the hot rolling large ingot casting of anti-vibration bar alloy material by adopting, heavy reduction rolling, not only increases production efficiency, and creates condition for improving mill speed, the serialization realizing the operation of rolling and automation.
(4) in fact hot-rolled process belongs to immediate processing steps is the essential step forming finished product blank.
D, the first heat treatment (annealing heat treatment): for ensureing that the surface quality of anti-vibration bar alloy material carries out vacuum annealing process after again carrying out surface finish, reconditioning to the bar after hot rolling, φ 16 anti-vibration bar alloy material bar carries out heating, being incubated at temperature 800 DEG C ± 10 DEG C.
Annealing heat treatment is divided into full annealing, partial annealing and stress relief annealing.The mechanical property of annealed material can detect with tension test, also can detect by hardness test.Intermediate heat-treatment is heat treatment in advance again, the heat treatment being defect for eliminating a upper procedure or making operation below carry out well processing and arrange.Be that metal is slowly heated to uniform temperature, keep enough time, then with a kind of metal heating processing technology of Reasonable Speed cooling.
The object of annealing
1. various tissue defects and residual stress that iron and steel causes in casting, forging and stamping, rolling and welding process improved or eliminated, workpiece deformation, cracking prevented.
2. softening workpiece is to carry out machining.
3. crystal grain thinning, improves tissue with the mechanical performance improving workpiece.
4. prepare for finished heat treatment (quenching, tempering) performs tissue.
E, cold-drawn: first carry out soft annealing process, be incubated 40 minutes at 720-750 DEG C of temperature; By deformation requirements glomerocryst mould successively drawing, and effects on surface micro-crack place carries out reconditioning, can carry out the drawing of lower road after reconditioning to zero defect.
Cold-drawn be by hot rolling after anti-vibration bar alloy bar reprocess at cold state after soft annealing, to obtain the production method of all kinds of precision, high-precision product or intermediate products.
F, the second heat treatment: anti-vibration bar alloy bar is pulled to finished-product material and is laid in bell-jar heat-treatment furnace, heat-treat under hydrogen shield state, between annealing soak, temperature is 788-815 DEG C, is incubated more than 3 hours; Then to be no more than below 28 DEG C/h of cooling velocity slow cooling to 610 DEG C, then air cooling is to room temperature.
Metal heat treatmet is one of important process in machine-building, compared with other processing technologys, heat treatment does not generally change the shape of workpiece and overall chemical composition, but by changing the microscopic structure of inside workpiece, or change the chemical composition of surface of the work, give or improve the serviceability of workpiece.Be characterized in the inherent quality improving workpiece, and this not to be generally naked eyes can see.
For making metal works have required mechanical property, physical property and chemical property, except reasonable selection material and various forming technology, Technology for Heating Processing is requisite often.Iron and steel is material most widely used in mechanical industry, and microstructure of iron and steel is complicated, can be controlled, so the heat treatment of iron and steel is the main contents of metal heat treatmet by heat treatment.In addition, aluminium, copper, magnesium, titanium etc. and alloy thereof also can change its mechanics, process based prediction model by heat treatment, to obtain different serviceabilities.
G, finished product are processed: align the bar after process, polish.
To the rectification that the shape defect of Metal Forming product carries out; it is one of important finishing procedure; cold-drawn material often can produce various shapes defect in production process or cooling afterwards and transportation; such as section bar tubing bending, wave, wooden dipper are bent; the defect such as can make to bend by various equipment for straightening to be eliminated under external force, make product reach qualified perfect condition.
(1) roughly grind: the polishing of product except to make smooth surface smooth except, the more important thing is and should reduce superficial lesions as far as possible.Every one branner's sequence must remove the deformation layer (deformation layer that at least last procedure should be made to produce reduces to the deformation layer degree of depth that this procedure produces) that last procedure causes, instead of only the polishing scratch of last procedure is removed; Meanwhile, this procedure itself should be accomplished to reduce damage as far as possible, so that carry out next process.The deformation layer degree of depth that last one branner's sequence produces should be very shallow, guarantees to remove in lower one polishing process.This process will be noted preventing metal from too generating heat.
(2) refine: the darker polishing scratch stayed when the object of fine grinding is and eliminates corase grind, for next step polishing is laid a solid foundation.Fine grinding normally carries out on sand paper, and sand paper divides waterproof abrasive paper and abrasive paper for metallograph.Usual waterproof abrasive paper is that SiC abrasive material is water insoluble, the abrasive material of abrasive paper for metallograph has Alundum, carborundum, iron oxide etc., property is all extremely hard, in polygon corner angle, have good cutting ability, during fine grinding, available water carries out manual wet-milling or mechanical wet-milling as lubricant, usually use granularity to be 240,320,400,600 4 kind of waterproof abrasive paper can carry out polishing after polishing, for comparatively soft metal, apply polishing again after thinner abrasive paper for metallograph polishing.Sand paper is outwardly facing have a down dip (from operator direction), be pasted onto when plate glass grinds, after sample flour milling is flat on sand paper, straight line pushes away forward when returning and leaves sand paper, thisly repeatedly carries out, until old polishing scratch all disappears, whole flour milling obtains consistent uniform new polishing scratch limit, direction only, before often changing one sand paper, first must wash sample and sand grains on hand with water, and dry, then sample half-twist is ground on secondary sand paper.The water flowed during use ceaselessly flows through from coated abrasive surface, in time most abrasive dust and the abrasive particle come off is washed away.Like this in whole polishing operation process, the sharp corners of abrasive particle all the time with the surface contact of sample, keep the ablation that it is good.Another advantage of wet grinding is, the frictional heat produced at specimen surface when the cooling effect of water can reduce polishing, avoids microscopic structure to change.Whole polishing operation can complete on same equipment.
The preparation method of described end cap, in turn includes the following steps: induction furnace smelting, forging, hot rolling, heat treatment, end cap Vehicle Processing; (needing the effect of supplementary each operation, object or technique effect)
Described induction furnace is smelted: bottom induction furnace, place nickel plate, pure iron, crome metal when alloy material is smelted, and load in mixture closely knit, after fusing 70%, the slag charge adding 2% of total charged material weight is made steel, recording after molten steel temperature reaches tapping temperature falls down molten steel in ladle, pours into steel ingot after calm 1-2 minute.
Anti-vibration bar alloy material requires pure; Chemical composition accurately, evenly; And have the structural state of specifying.Induction furnace is adopted to have a series of unarguable advantage.Because it not to have in other equipment existing pollution sources, can ensure to obtain concerning metal material the purest carbon and other impurity; Metal bath is stirred thus the uniformity ensureing alloy owing to having electric power; Ensure obtain exactly and keep the temperature required for metal and temperature is uniformly distributed along whole bath temperature; Eliminate hot-spot; Because its thawing speed is fast, iron loss is few, thus is obtain regulation alloying component accurately, and minimum melting loss of elements creates favorable conditions; When changing the refining chemical composition metal different from forehearth, it has very high mobility.
Described forging: the steel billet steel ingot of the anti-vibration bar alloy material after being smelted by induction furnace being forged into after 1150-1220 DEG C of heating and insulation 50*50mm size; By delivering to lower step hot rolling blank operation after surface finish reconditioning
.
Forging is that one utilizes metal forming machinery to apply pressure to metal stock, it is made to produce plastic deformation to obtain the processing method with certain mechanical performance, definite shape and size forging, the defects such as cast condition that metal produces in smelting process is loose can be eliminated by forging, optimize heterogeneous microstructure, simultaneously owing to saving complete metal streamline, the mechanical performance of forging is generally better than the foundry goods of same material.The strength member that in associated mechanical, load is high, condition of work is severe, except the sheet material of the better simply available rolling of shape, section bar or weldment, adopts forging more.In general forging is that the first step belonging to materials processing is called " cogging "
Described hot rolling: by anti-vibration bar alloy material 50 × 50mm blank, carries out hot rolling after being placed in heating at 1200 ± 10 DEG C of temperature, insulation, is rolled into the bar of ф 13 × 25mm.
The steel of the various geometric cross section shapes that blank rolls into by the mode that anti-vibration bar alloy material becomes the heating of 50 × 50mm blank by hammer cogging.Different according to sectional shape shape, be divided into simple section, compound section or three kinds of shaped steel such as special-shaped section and die rolled section.
(1) hot rolling significantly can reduce energy consumption, reduces costs.During hot rolling, plastic deformation is high, and resistance of deformation is low, greatly reduces the energy ezpenditure of flow of metal.
(2) hot rolling can improve the process industrial art performance of metal and alloy, and the coarse grain by as-cast condition is broken, and remarkable crack healing, reduces or eliminates casting flaw, as-cast structure is changed into the Deformation structure of refinement, puies forward heavy alloyed processing characteristics.
(3) the hot rolling large ingot casting of anti-vibration bar alloy material by adopting, heavy reduction rolling, not only increases production efficiency, and creates condition for improving mill speed, the serialization realizing the operation of rolling and automation.
(4) in fact hot-rolled process belongs to immediate processing steps is the essential step forming finished product blank.
Described heat treated priority comprises: (1) solution treatment: the end cap material 13*25mm material after hot rolling is laid in solution treatment in bell hydrogen resistance furnace gas shielded stove; (2) Ageing Treatment: the bar after solution treatment is also placed in hydrogen shield stove and carries out Ageing Treatment.
Solution treatment be in order to dissolve carbide in matrix, γ ' is equal to obtain uniform supersaturated solid solution, again precipitate particle tiny, the hardening constituent such as carbide and γ ' that is evenly distributed when being convenient to timeliness, eliminate the stress because cold and hot working produces simultaneously, make alloy generation recrystallization.Secondly, solution treatment is to obtain suitable grain size, to ensure alloy high-temp creep-resistant property.The temperature range of solution treatment greatly between 980 ~ 1250 DEG C, mainly according to separate out mutually in each alloy and dissolution law and instructions for use are selected, to ensure the precipitation condition of main hardening constituent necessity and certain grain size.For the alloy that long term high temperature uses, require good high-temperature and durable and croop property, higher solid solubility temperature should be selected to obtain larger grain size; Middle temperature used and requires the alloy of good room temperature hardness, yield strength, hot strength, impact flexibility and fatigue strength, lower solid solubility temperature can be adopted, ensure less grain size.During higher temperature solid solution, various precipitated phase all progressively dissolves, simultaneously grain growth; During low temperature solution treatment, not only there is the dissolving of main hardening constituent, and the precipitation of some phase may be had.For the alloy that degree of supersaturation is low, usually select cooling velocity faster; For the alloy that degree of supersaturation is high, be generally in air and cool.
Ageing Treatment: refer to that alloy workpiece is through solution treatment, cold plastic deformation or casting, after forging, keeps its performance, shape, the Technology for Heating Processing of size time to time change in the placement of higher temperature or room temperature.According to by workpiece heat to higher temperature, and the short period carry out the aging treatment process of Ageing Treatment, be called artificial aging process, if long storage time and the aging phenomenon occurred under workpiece being placed on room temperature or natural conditions, be called natural aging treatment.The third mode be oscillating aging from the eighties from the beginning of progressively entering the practical stage, vibration stress relief treatment is not then when heating also time-consuming unlike natrual ageing, with the vibration applying certain frequency to work, its internal stress is released, thus reaches the object of timeliness.The object of Ageing Treatment, eliminate the internal stress of workpiece, stabilizing tissue and size, improve mechanical performance etc.
In machinery production, in order to stable casting dimension, often foundry goods is at room temperature placed for a long time, just then carry out machining.This measure is also referred to as timeliness.But this timeliness does not belong to metal heating processing technology.
Described end cap Vehicle Processing: the 13*25mm material after Ageing Treatment is machined, is processed into the end cap of required size.
Technique effect of the present invention: the anti-vibration bar assembly of AP1000 unit steam generator of the present invention, structure is simple, and product quality meets in nuclear power station that steam generator is to the rigorous of anti-vibration bar, safer during use.The preparation method of this anti-vibration bar, through strict preparation section, ensure that the technological requirement to the anti-vibration bar assembly of steam generator in nuclear power station, ensure that quality, improve security.Described end cap upsetting pressure is fixed in described anti-vibration bar, prevents end cap from occurring pulling in the assembling, welding process of anti-vibration bar assembly and described U-tube.During concrete enforcement, the central authorities of described end cap and in anti-vibration bar the part at contiguous end cap two ends flatten.
Accompanying drawing explanation
Fig. 1 is the structural representation of the anti-vibration bar assembly of AP1000 unit steam generator of the present invention, Reference numeral: 1--anti-vibration bar, 2--end cap.
Detailed description of the invention
Embodiment 1
As Fig. 1, the anti-vibration bar assembly of the AP1000 unit steam generator of the present embodiment, it comprises: the anti-vibration bar 1 of V-shape structure and respectively fixed cover are located at two end caps 2 at anti-vibration bar two ends.
Described anti-vibration bar 1 selects 405 stainless steel materials (SA-479TYPE405); Described end cap 2 selects 690 nickel-bass alloy materials (SB-166UNSN06690).
Being crushed everywhere of contiguous end cap two ends in the central authorities of described end cap 2 and anti-vibration bar 1.Two flattenings place that anti-vibration bar 1 is in end cap end are symmetrical.
The preparation method of above-mentioned anti-vibration bar assembly, comprising: the preparation of anti-vibration bar bar, the preparation of end cap, anti-vibration bar bar bend the operations such as shaping, end cap assembling, upsetting pressure, inspection, clean and packaging.
Described anti-vibration bar bar bends shaping: by anti-vibration bar bar on request size overall length add 50mm allowance and cut off, set angle bends anti-vibration bar, and the anti-vibration bar after bending is placed on surface grinding machine, carries out reconditioning to drawing requirement to bent angle buildup area.
Described end cap assembling: end cap alcohol is dabbed and washes the endoporus that end cap is surperficial and Linear cut is shaping, with alcohol, stainless steel bars is cleaned simultaneously, after cleaning up, deburring, bite mark, protrusion metal or wedge angle; Again stainless steel bar is inserted cap end, alignment angle is assembled.
Described upsetting pressure comprises: (1) pulling-out force procedure qualification: carry out pulling-out force evaluation to having assembled and having carried out the end cap after upsetting pressure, make cap bag under the pulling force of minimum 4448N, 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: cap end is put into upsetting pressure mould, carries out upsetting pressure to the position at the contiguous end cap two ends on the middle position of end cap and anti-vibration bar respectively with hydraulic press, and pressure keeps pressure off-load after 10 seconds behind location, meets drawing requirement after ensureing the upsetting pressure of cap end.Upsetting pressure position in anti-vibration bar has everywhere, and contiguous each two places, end cap end, for carrying out spacing to cap end, prevent end cap to be subjected to displacement in anti-vibration bar.
Described inspection: (1) flatness detects, and detection platform is measured with clearance gauge; (2) size detection, uses digimatic micrometer measurement products; (3) angle detects, and measures with digital display angle measuring instrument; (4) visual detection, carries out visual detection piece by piece to workpiece, guarantees surperficial zero defect, and surface roughness roughness measuring instrument carries out crawlling measurment; (5) surface finish measurement, measures with roughness instrument or contrast sample block; All size detection results should meet drawing requirement.
Described clean: by relevant regulations, bar to be cleaned, guarantee that finished surface does not have rust staining, dust and other pollutants, (1) metal of sulphur, lead, mercury, cadmium and other low melting points, and their alloy and compound, halogen-containing material is all forbidden for the preparation of anti-vibration bar, test, the process such as inspection and packaging; (2) lubricant, cuttings liquid and cleaning agent be not also containing above-mentioned substance; Molykote, politef and other poly-fluorine materials also prohibit the use.
Embodiment 2
The preparation method of the anti-vibration bar bar in above-described embodiment 1, comprises following operation successively: induction furnace smelting, heat analysis, forging, hot rolling, the first heat treatment, performance test (stretch, hardness) and metal lographic examination, product analysis, cold-drawn, the second heat treatment, finished product processing, performance test (stretch, hardness) and grain size inspection, dimension control, mark, clean.
Described induction furnace is smelted: bottom induction furnace, place nickel plate, pure iron, crome metal when alloy material is smelted, and load in mixture closely knit, after fusing 70%, the slag charge adding 2% of total charged material weight is made steel, recording after molten steel temperature reaches tapping temperature falls down molten steel in ladle, pours into steel ingot bar after calm 1-2 minute.Steel ingot weight every 40-50kg, steel ingot diameter microcephaly 140mm, major part 155mm.
Described heat analysis comprises: (1) samples: apart from the head of ingot, car or dig sample for chemical analysis beyond ingot tail 20mm scope; (2) chemical analysis that a sample for chemical analysis measures every stove steel is got to each heat (batch) number, and screen by content standard data.Melting chemical analysis should meet following table and require:
Described forging: by analyze qualified after steel ingot at 1150-1220 DEG C, be forged into the steel billet of 50*50mm size;
(1) Forge Heating thermometer:
(2) forge: forging compression ratio is: 4-6; Forging size: 50*50mm; Square billet major part excision more than 100mm, microcephaly excises more than 50mm; Forging stock surface treatment: forging stock surface strips off the skin reconditioning, removes the blemish such as surface wrinkles crackle pipe.
Described hot rolling: carry out hot rolling under steel billet being placed in 1050-1100 DEG C of temperature, be rolled into the bar of ф 16mm, will check the crackle of surface quality, fold, scab, be mingled with by root, and thoroughly polishing is clean after hot rolling cooling;
(1) billet heating temperature table is as follows:
(2) rolling: adjustment work wants straight to the outward appearance of rolled products, is rolled into the silk material of ф 16mm; Will check the crackle of surface quality, fold, scab, be mingled with by root after milling material cooling, and thoroughly polishing is clean; Rolling is compared: >=5.
The first described heat treatment: vacuum annealing process is carried out to the bar after hot rolling, temperature remains on 800 ± 10 DEG C;
Described performance test comprises: (1) is appointed each batch of the hot rolled rod after heat treatment number and got one group of sample; (2) respectively tension test, hardness test, Metallographic Analysis and product analysis are carried out to sample, substandard product is got rid of;
1. stretch test result should meet following table requirement:
As bar≤25mm, the longitudinal axis of sample is consistent with the center of bar, and the distance of sample useful part distance bar heat treated end must not be less than the diameter of bar.
2. hardness test should meet:
Hardness test should in the hardness of the middle part of bar center to face inspection bar.
3. Metallographic Analysis should meet:
4. product analysis: material product analysis is done in sampling at the two ends of tensile sample, and analysis result should meet:
5. retrial and another warm process:
If the stretch test result of 5.1 bars is undesirable, two additional samples can be cut at the contiguous position of failed test sample and carry out tension test, only can check and accept when two additional specimen test results all meet the demands;
If 5.2 any a collection of bar heat treatments are improper and cause mechanical property defective, then can to this batch of material another warm process, but heat treated number of times should more than twice again; After another warm process, this batch of material is carried out to all inspections (inspection except chemical analysis and non-metallic inclusion) of technical conditions regulation; All inspections all should meet the requirement of these technical conditions.
Described cold-drawn comprises: (1) first carries out soft annealing process, at 720-750 DEG C of temperature, be incubated 40 minutes; (2) by deformation requirements glomerocryst mould successively drawing, and effects on surface micro-crack place carries out reconditioning, can carry out the drawing of lower road after reconditioning to zero defect.
Drawing deflection during cold-drawn is φ 16 → φ 14 → φ 12.5 → 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: will be pulled to finished-product material and be laid in bell-jar heat-treatment furnace, and heat-treat under hydrogen shield state, 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: the bar after heat treatment to be aligned, the cold working operation such as polishing, the thickness after processing, width, torsion resistance, linearity equidimension should meet following table and require:
Described performance test: carry out mechanical property test, hardness test, grain size inspection to bar, the bar required is got rid of to not meeting the specification.
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 requirement, then can carry out retrial in the contiguous double sampling in position of this sample, retrial result all should meet the specification requirement.
Described dimension control comprises: (1) visual examination: to often propping up material surface by Zhi Jinhang visual inspection, require the defect such as flawless, scuffing, bar does not allow to carry out any repair by welding, and its surface roughness is checked by Zhi Jinhang, need inspection be increased to suspicious district, record result and answer Ra≤1.6 μm; (2) dimensional gaughing: the material taking out 5% carries out dimensional gaughing, guarantees that scantling meets the tolerance of 4.028 ± 0.013* (12.19).
Described mark: material accurately should make mark or tie on a label often propping up, writing maker's name exactly, material trademark and specification; Hearth number, lot number and piece number; Contract number or order number.
Described is clean: clean bar by relevant regulations, guarantee that finished product Surface of Rod Bar does not have rust staining, dust and other pollutants; Rod iron can not contact the material itself and integrality being had to harm.The incompatibility material of main metal has lead, zinc, copper, aluminium, cadmium, tin, mercury, sulphur, arsenic, boron and general low-melting alloy and their compound thereof, in addition, the fluoride produced due to the degraded of plastic containing chlorine, sulfate, chloride and acid chloride are a potential danger, answer careful selection adhesive tape, marking pen, couplant, bleeding agent and coating; If use milling tools, first to guarantee that milling tools is not contaminated.
Embodiment 3
The preparation method of the end cap in above-described embodiment 1, comprises following operation successively: induction furnace smelting, electroslag refining, heat analysis, forging, ultrasonic examination, hot rolling, heat treatment, performance test, product analysis, end cap Vehicle Processing, dimension control, mark, clean.
Described induction furnace is smelted: bottom induction furnace, place nickel plate, pure iron, crome metal when alloy material is smelted, and load in mixture closely knit, after fusing 70%, the slag charge adding always feed intake 2% is made steel, recording after molten steel temperature reaches tapping temperature falls down molten steel in ladle, pours into steel ingot bar after calm 1-2 minute, steel ingot weight every 40-50kg, steel ingot diameter microcephaly 140mm, major part 155mm.
Described electroslag refining: alloy material, after smelting, effectively will could improve degree of purity, the structural homogenity of steel alloy, improve the surface of steel ingot, inherent quality through electroslag refining, improves the performance of steel alloy.When electroslag refining is complete, carry out feeding, after feeding 3-5 minute, cool >=3 minutes de-ingots.Then ESR ingot surface treatment is carried out: surface strips off the skin, reconditioning.
Described heat analysis comprises: (1) samples: apart from the head of ingot, car or dig sample for chemical analysis beyond ingot tail 20mm scope; (2) get a sample for chemical analysis to each heat (batch) number, carry out Chemical bath deposition by the test method of " ASTME38 nickel-chromium and nickel-chromium-ferro alloy chemical analysis method " requirement to material, and screen by content standard data, melting chemistry should meet:
Described forging: by analyze qualified after steel ingot at 1240-1260 DEG C of temperature, be forged into the steel billet of 50*50mm size.
1. will carry out annealing in process to steel ingot before forging, heat treatment temperature according to the form below carries out:
2. deformation technique: forging compression ratio is: 4-6; Square billet major part excision more than 100mm, microcephaly excises more than 50mm; Forging square billet is of a size of 50*50mm; Forging stock surface treatment: forging stock surface strips off the skin reconditioning, removes the blemish such as surface wrinkles crackle pipe.
Described ultrasonic examination: the square rod of the reconditioning that strips off the skin is carried out ultrasound examination by the detection method specified in " bar Dynamic Non-Destruction Measurement condition " and acceptance criteria.
Described hot rolling: carry out hot rolling under square billet being placed in about 1200 DEG C temperature, be rolled into the material of 13*25mm, hot-rolled temperature deviation is no more than 10 degree, defects such as will checking the crackle of surface quality by root after hot rolling cooling, fold, scab, be mingled with, and thoroughly polishing is clean;
1. the square billet after forging first carries out annealing in process before hot rolling, and annealing temperature is as following table:
2. roll control: end cap material is rolled into 13*25mm; Defects such as will checking face crack by root after milling material cooling, fold, scab, be mingled with, and excision or thoroughly polishing are clean; Rolling ratio is >=5.
Described heat treatment comprises: 1. solution treatment: the end cap material 13*25mm material after hot rolling is laid in solution treatment in bell hydrogen resistance furnace gas shielded stove, and heat treatment temperature is as following table:
Wherein, holding temperature deviation be no more than ± 10 DEG C.
2. Ageing Treatment: the bar after solution treatment must carry out Ageing Treatment, Ageing Treatment also should be carried out in hydrogen shield stove, and heat treatment temperature is:
| Steel grade | Specification | Heating-up temperature DEG C | Temperature retention time (h) | The type of cooling |
| SB-166 UNS N06690 | 13*25mm | 704～732℃ | 8-12h | Air cooling |
Wherein, Ageing Treatment the temperature deviation of soak should not exceed ± 10 DEG C.
3. solid solution and aging strengthening model record should be listed in certificate of quality file, and heat treatment record should comprise holding temperature and deviation, temperature retention time, the rate of heat addition, heating atmosphere and the type of cooling.
Described performance test comprises:
1. sample: each batch number is appointed and got a sample and do mechanical property test, and the longitudinal axis of tensile sample is in the axis of bar.The useful part of tensile sample is at least one times of diameter of rod from bar end; Position residing for the longitudinal axis of tensile sample is bar center; Sample has enough length, to intercept all test consumptions such as hardness specimens, metallographic specimen and the sample of possibility needed for retrial.
2. tension test should meet:
Wherein, tension test adopts the standard specimen of gauge length 50mm, diameter 12.5mm.
3. Metallographic Analysis: do Metallographic Analysis in the sample close position sampling of tension test, Metallographic Analysis examination criteria is:
4. macro-erosion test: often criticize and appoint extraction one to carry out macroetch test, should test at the crop cross section position, two ends of bar, with the naked eye or by less than 10 times magnifying glasses evaluate, do not allowed the defects such as shrinkage cavity, cavity, crackle, slag inclusion and pin hole.
5. Huey test: often criticize bar and any bar after Ageing Treatment should get one group of (two) sample and carry out Huey test, sample is got in stretching adjacent locations, sample should first through sensitized treatment, sensitized treatment system be 675 DEG C ± 5 DEG C insulation 1 hour, sample corrosion rate should be less than 20mdd (milligram/square decimeter. sky).
6. product analysis: each stove is appointed and got the product analysis that a sample does material near tensile sample, and product analysis result should meet:
Described end cap Vehicle Processing: the 13*25mm material after Ageing Treatment is made a service test, and qualified material is machined, be processed into φ 22.86 ± 0.05 on request, the end cap product of long 50.8 ± 0.07.
Described dimensional gaughing: 1, to often propping up material surface by Zhi Jinhang visual inspection, end cap has not allowed indentation, burr, lobe, metal to heave.2, carry out dimensional gaughing to material, the inspection quantity of every stove material should be greater than 5%.
Described mark: material accurately should make mark or tie on a label often propping up, should comprise: job number, material trademark and specification, bar piece number, hearth number, heat treatment heat (batch) number, bar maker's name.
Described is clean: clean bar by relevant regulations, guarantee that finished product end cap surface does not have rust staining, dust and other pollutants.
Claims (1)
1. a nuclear power generating sets steam generator preparation method for anti-vibration bar assembly, is characterized in that: this anti-vibration bar assembly comprises: the anti-vibration bar of V-shape structure and respectively fixed cover are located at the end cap at anti-vibration bar two ends; Described anti-vibration bar selects 405 stainless steel materials; Described end cap selects 690 nickel-bass alloy materials; U-shaped heat transfer tube in unit steam generator is also nickel-bass alloy material, and the two material is identical;
The preparation method of described anti-vibration bar assembly, in turn includes the following steps:
A, anti-vibration bar bar is bent shaping operation: anti-vibration bar bar is bent anti-vibration bar by set angle;
The operation of B, end cap assembling: end cap alcohol is dabbed and washes end cap surface and Linear cut endoporus, with alcohol, anti-vibration bar bar is cleaned simultaneously, after cleaning up, deburring, bite mark, protrusion metal or wedge angle; Again the end of anti-vibration bar bar is inserted in the endoporus of end cap;
The operation of C, upsetting pressure: end cap is put into upsetting pressure mould, with hydraulic press respectively to the middle position of end cap and in anti-vibration bar contiguous end cap two ends carry out upsetting pressure, also the upsetting pressure position namely in anti-vibration bar has everywhere, contiguous each two places, end cap end, and pressure keeps pressure off-load after 10 seconds behind location;
The preparation method of described end cap, comprises following operation successively: induction furnace smelting, forging, hot rolling, heat treatment, end cap Vehicle Processing;
Wherein, described induction furnace is smelted: bottom induction furnace, put nickel plate, pure iron, crome metal when 690 nickel-bass alloy materials are smelted, after fusing 70%, the slag charge adding 2% of total charged material weight is made steel, recording after molten steel temperature reaches tapping temperature falls down molten steel in ladle, pours into steel ingot after calm 1-2 minute;
Described forging: the steel billet that the alloy material steel ingot after being smelted by induction furnace is heated at 1150-1220 DEG C and is forged into 50*50mm size after insulation, and carry out surface finish reconditioning;
Described hot rolling: carry out hot rolling after above-mentioned steel billet being placed in heating at 1200 ± 10 DEG C of temperature, insulation, be rolled into the bar of φ 13*25mm;
Described heat treatment successively comprises: (1) solution treatment: the bar of the φ 13*25mm after hot rolling is laid in solution treatment in bell hydrogen resistance furnace gas shielded stove; (2) Ageing Treatment: the bar after solution treatment is also placed in hydrogen shield stove and carries out Ageing Treatment;
Described end cap Vehicle Processing: the bar of the φ 13*25mm after Ageing Treatment is machined, is processed into the end cap of required size.
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| CN201210297066.2A CN102794608B (en) | 2012-08-20 | 2012-08-20 | Anti-vibration strip component of steam generator of AP1000 nuclear power unit |
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| CN103659172B (en) * | 2012-09-23 | 2016-04-13 | 丹阳市龙鑫合金有限公司 | Prepare the method for the anti-vibration bar of nuclear power generating sets steam generator |
| CN103659173B (en) * | 2012-09-23 | 2016-05-11 | 丹阳市龙鑫合金有限公司 | The end cap of the antivibration bar assembly of nuclear power generating sets steam generator |
| CN103868051B (en) * | 2012-12-13 | 2015-08-26 | 中国核动力研究设计院 | PWR nuclear power plant steam generator march-past vibrationproof bar structure |
| CN106624601A (en) * | 2015-10-28 | 2017-05-10 | 丹阳市龙鑫合金有限公司 | Anti-vibration strip assembly for nuclear power station and production method thereof |
| CN106653127B (en) * | 2015-10-28 | 2018-03-23 | 丹阳市龙鑫合金有限公司 | A kind of ACP1000 used in nuclear power station antivibration bar assembly and its production method |
| CN106653128B (en) * | 2015-10-28 | 2018-03-23 | 丹阳市龙鑫合金有限公司 | ACP1000 used in nuclear power station antivibration bar assemblies and its production method |
| CN106624602A (en) * | 2015-10-28 | 2017-05-10 | 丹阳市龙鑫合金有限公司 | Vibration-resistant bar component for water reactor nuclear power plant ACP1000 and production method of component |
| CN106624603A (en) * | 2015-10-28 | 2017-05-10 | 丹阳市龙鑫合金有限公司 | ACP1000 anti-vibration strip assembly and production method thereof |
| CN107675115A (en) * | 2017-10-25 | 2018-02-09 | 成都先进金属材料产业技术研究院有限公司 | A kind of cold rolled annealed method of titanium seamless tubes |
| CN108555202B (en) * | 2018-04-10 | 2019-09-13 | 抚顺特殊钢股份有限公司 | A kind of manufacturing method of diameter forging machine production nuclear leve driving mechanism insertion pin flat bar |
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Also Published As
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| CN103934644B (en) | 2016-03-30 |
| CN103934648B (en) | 2016-05-04 |
| CN103934648A (en) | 2014-07-23 |
| CN102794608B (en) | 2014-04-02 |
| CN103934644A (en) | 2014-07-23 |
| CN102794608A (en) | 2012-11-28 |
| CN103934649A (en) | 2014-07-23 |
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