CN106853551A - A kind of hook and its manufacture method with novel wear resistant Rotating fields - Google Patents
A kind of hook and its manufacture method with novel wear resistant Rotating fields Download PDFInfo
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- CN106853551A CN106853551A CN201611062975.2A CN201611062975A CN106853551A CN 106853551 A CN106853551 A CN 106853551A CN 201611062975 A CN201611062975 A CN 201611062975A CN 106853551 A CN106853551 A CN 106853551A
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- hook
- pin
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- hole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/34—Laser welding for purposes other than joining
- B23K26/342—Build-up welding
-
- 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
- G21C—NUCLEAR REACTORS
- G21C7/00—Control of nuclear reaction
- G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
- G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
- G21C7/12—Means for moving control elements to desired position
- G21C7/14—Mechanical drive arrangements
-
- 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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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
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- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention discloses a kind of nuclear power station CRDM hook and its manufacture method with novel wear resistant Rotating fields.The hook structure is：The wearing layer profile of pin-and-hole is square；Briar tooth is plane with the faying face of matrix.The present invention uses laser 3D printing technology, and manufacturing step is as follows：S1：Set up blank three-dimensional digital-to-analogue；S2：Laser deposition fabrication scheme is formulated, and logarithmic mode is decomposed, cut into slices and laser beam scan path planning；S3：Setting Fabrication parameter and basketry control program；S4：Complete preparation before manufacture；S5：Program according to setting carries out laser deposition manufacture；S6：Hook blank is separated from substrate cut, is then heat-treated；S7：Acquisition hook finished product is machined out to the hook blank after heat treatment.Hook produced by the present invention has mechanical property more more preferable than oxygen-acetylene repairing hook, and the fully automated control of production process is not influenceed by operating personnel, is adapted to batch production, can completely substitute oxygen-acetylene repairing hook.
Description
Technical field
The invention belongs to laser gain material manufacture field, it is related to for a kind of new of nuclear power station CRDM hook
Structure and manufacture method.
Background technology
CRDM is the key equipment of nuclear power plant reactor, is also uniquely to move equipment on reaction reator body.
Hook component is one of most crucial, most critical part in CRDM.The startup of reactor, power adjusting, power
The feature operations such as holding, normal shutdown and breakdown, exactly enter to show mode by two groups of hooks according to the pendulum that sequential is moved
Completing drive rod drives the lifting of reactor core control rod, underthrust to act to realize.
The development of nuclear power technology is proposed higher to the security of reactor system and equipment, reliability and economy
It is required that.Used as consumable accessory, the characteristic such as the wear-resistant of hook, heat resistance, corrosion-resistant directly determines whole CRDM
Service life.Overlaying-type hook is difficult to collapse tooth, fracture and fragmentation due to its superior impact resistance, corrosion resistance, amount containing cobalt it is low and
More preferable wearability and be widely adopted.But the operation difficulty for carrying out oxy-acetylene manual build up welding in aperture due to it is high, technique
Stability is poor, low production efficiency, product percent of pass are low, and the product of domestic relevant unit does not have practical engineering application to be worth.It is domestic
This kind of hook almost all that nuclear power engineering is used uses import.Overlaying-type hook, connecting rod turn into CRDM in only
One is not carried out the domestic part of mass.
Laser gain material is produced by deconstructing three-dimensional structure for recycling high energy laser beam carries out stacking manufacture after two dimension
Technology.There is unique advantage for the processing and manufacturing of complex component, refractory material.The present invention is just to provide a kind of with new
The hook and its laser deposition manufacture method of wear-resisting Rotating fields.
The content of the invention
The invention provides a kind of nuclear power station CRDM hook and its laser with novel wear resistant Rotating fields
Deposition process method.
Nuclear power station CRDM hook novel wear resistant Rotating fields proposed by the present invention, it is characterized in that：Pin-and-hole area is resistance to
Mill layer profile is square, and briar tooth is planar structure with matrix faying face.
The laser deposition system of the nuclear power station CRDM hook with novel wear resistant Rotating fields proposed by the present invention
Method is made, is comprised the following steps：
S1：Set up hook blank three-dimensional digital model；
S2：Hook laser deposition fabrication scheme is formulated, and logarithmic mode is decomposed, cut into slices and laser beam scan path planning；
S3：Setting laser deposition Fabrication parameter and basketry control program；
S4：Complete preparation before laser deposition manufacture；
S5：Program according to setting carries out laser deposition manufacture；
S6：Hook blank is separated from substrate cut it is right, after be heat-treated；
S7：Hook blank after heat treatment is machined out, hook finished product is obtained.
The hook jaw pin porose area wearing layer square length of side of the present invention is not less than 10.5mm not less than the length of side, no more than
19.0mm。
Hook laser deposition manufacture method S2 steps of the present invention, it is characterised in that：
S2-1：Hook blank is used to be grown with the flat manner that briar tooth faces up；
S2-2：Hook blank digital-to-analogue is divided into bottom, pin-and-hole layer, four part of connecting layer and briar tooth layer；Bottom is hook matrix
Area；Pin-and-hole layer is the corresponding hook body midsection point of pin-and-hole wearing layer；Binder course is between pin-and-hole layer top and briar tooth layer
Matrix region；Briar tooth layer is briar tooth wearing layer；
S2-3：Four parts are cut into slices respectively；
S2-4：Subregion is carried out to section, and plans the laser beam scan path of each subregion；
S2-5：The section of establishment hook blank and laser deposition fabrication schedule file.
Laser deposition manufacture hook blank S3 steps setting laser deposition Fabrication parameter of the present invention, it is characterised in that：
Laser spot diameter is φ 2mm ~ φ 6mm, and laser power is 1kw ~ 5Kw, laser scanning speed 3mm/s ~ 30mm/s, laser scanning
Overlapping rate is 30% ~ 50%, and slice thickness is 0.5mm ~ 2.0mm.
Laser deposition of the present invention manufactures hook blank S4 steps, it is characterised in that：
S4-1：To base material degreasing, surface polishing scale removal, then cleaning, drying；
S4-2：Base material is placed on the workbench in the laser deposition molding storehouse of argon atmospher protection and fixed, adjustment powder feeder
To the distance of substrate surface, and set the beginning and end of laser scanning；
S4-3：Laser deposition manufacture hook blank is loaded into powder feeder with raw material powder；
S4-4：Carry out the reasonability of laser deposition fabrication schedule prerun, testing equipment operation accuracy and program operation.
Laser deposition of the present invention manufactures hook blank S5 steps, it is characterised in that：According to bottom --- pin-and-hole
The order of layer --- connecting layer --- briar tooth layer carries out laser deposition manufacture.
Laser deposition of the present invention manufactures the heat treatment of hook blank S6 steps, it is characterised in that：Heat treatment temperature is
800 DEG C ~ 1075 DEG C, the type of cooling is furnace cooling.
The machining of S7 steps of the present invention, it is characterised in that：
S7-1：Datum level is processed --- and two sides of Milling Machining hook blank turn into processing datum；
S7-2：Pin-and-hole axle center positions --- orientate the wear-resisting district center position of pin-and-hole square under datum level as pin-and-hole axle center, then
According to size requirement pin-and-hole axle center is positioned in the wear-resisting area of upper pin-and-hole square；
S7-3：Punching --- with the axle center set it is machining center, hole milling is carried out in wearing layer area；
S7-4：Then the numerical programming procedure on the basis of upper and lower pin-and-hole axle center, completes the machining of hook.
S2-3 digital-to-analogues section of the present invention, it is characterised in that：At least it is divided into three scannings point in pin-and-hole layer slice plane
Area --- matrix area, lower pin-and-hole high-abrasive material area and upper high-abrasive material area of pin-and-hole portion；High-abrasive material sector width between 10.5mm ~
Between 19mm.
S2-4 laser beam scan paths planning of the present invention, it is characterised in that：The laser scanning of same section different zones
Path can mutually be mutually perpendicular to, it is also possible to be parallel to each other；The laser beam scan path of adjacent two layers can be with identical, it is also possible in one
Determine angle, such as 90 °.
The base material of S4-1 steps of the present invention, it is characterised in that：Base material is stainless steel, such as 12Cr17Mn6Ni5N,
12Cr18Ni9, Y12Cr18Ni9, Y12Cr18Ni9Cu3,06Cr19Ni10,00Cr18Ni9N.
S4-3 laser depositions of the present invention manufacture hook blank raw material powder, it is characterised in that：Hook matrix former material
Feed powder end is this body powder of stainless steel of 00Cr18Ni9N control nitrogen Austria；Wearing layer raw material powder is the cobalt-based alloy powders of Stellite 6
End.
S4-3 powder feeders of the present invention, it is characterised in that：Powder feeder at least possesses two powder feeding storehouses of sealing.
Invent this body powder of stainless steel of described 00Cr18Ni9N controls nitrogen Austria, it is characterised in that：The manufacturer of the material powder
Method is rotary electrode method or gas atomization.
The Co-based alloy powders of Stellite of the present invention 6, it is characterised in that：The manufacture method of the material powder is rotation
Turn electrode method or gas atomization.
The hook that the present invention is provided has crystal grain tiny, and mechanical property is good, and wearing layer hardness uniform, controllable, residual stress is small
Etc. advantage.The laser deposition manufacture method that the present invention is provided is different from traditional-handwork oxygen-acetylene repairing technique dependence operator,
Production process Automatic Control, laser deposition manufacture system is totally-enclosed, not by external environment and operating personnel's technical merit and work
Make the influence of state, production yield rate is high, with product mass production advantage.
Brief description of the drawings
Drawings and Examples can be so that the present invention is further described, and accompanying drawing is as follows：
Fig. 1 oxygen-acetylene repairing hook structural representations；
Pin-and-hole wearing layer structural representation under Fig. 2 oxygen-acetylene repairing hooks；
Fig. 3 oxygen-acetylene repairing hook briar tooths and matrix faying face schematic diagram；
Fig. 4 laser depositions manufacture hook structural representation；
Pin-and-hole wearing layer structural representation under Fig. 5 laser depositions manufacture hook；
Fig. 6 laser depositions manufacture hook briar tooth and matrix faying face schematic diagram；
Fig. 7 laser depositions manufacture hook blahk structure schematic diagram；
Fig. 8 laser depositions manufacture hook blank pin-and-hole layer section schematic diagram；
Fig. 9 laser depositions manufacture hook blank pin-and-hole layer section laser beam scan path planning chart；
6 heat treatment hardnesses of Figure 10 laser deposition Stellite-temperature curve；
Figure 11 laser deposition control nitrogen austenitic stainless steels heat treatment hardness-temperature curve；
Figure 12 laser depositions manufacture hook blank machining pin-and-hole axle center positioning schematic diagram.
Numbering explanation：1 --- oxygen-acetylene repairing hook matrix, 2 --- pin-and-hole and its wearing layer under oxygen-acetylene repairing hook,
3 --- pin-and-hole and its wearing layer, 4 on oxygen-acetylene repairing hook --- oxygen-acetylene repairing hook briar tooth wearing layers；5 --- laser sinks
Product hook matrix, 6 --- pin-and-hole and its wearing layers, 7 under laser deposition hook --- pin-and-hole and its wear-resisting on laser deposition hook
Layer, 8 --- laser deposition hook briar tooth wearing layer；9 --- laser deposition manufacture hook blank bottom, 10 --- laser deposition system
Make hook blank pin-and-hole wearing layer, 11 --- laser deposition manufactures hook blank binder course, 12 --- and laser deposition manufactures hook
Blank briar tooth layer；13 --- pin-and-hole areas, 14 under laser deposition manufacture hook blank --- sell on laser deposition manufacture hook blank
Porose area；15 --- pin-and-hole axle center, 16 under laser deposition manufacture hook blank --- pin bore axis on laser deposition manufacture hook blank
The heart.
Specific embodiment
The manufacture method of oxygen-acetylene repairing hook is：It is machined to using 00Cr18Ni9N control nitrogen austenitic stainless steel forging rods
Hook matrix 1, the pin hole processing on matrix；Pin-and-hole 2 is wherein descended to be processed into the symmetric pyramid hole with certain inclination angle, such as Fig. 2 institutes
Show；Briar tooth facing cut processes groove surface, as shown in Figure 3；Then oxy-acetylene heap is carried out with the cobalt-base alloy welding wires of Stellite 6 again
Weldering pin-and-hole wearing layer 2 and 3, in briar tooth surface build-up welding briar tooth 4；Then blank is made annealing treatment, finally carries out finished product machining.
One of difficult point of the technique is the built-up welding of wearing layer in pin-and-hole.The pin-and-hole of hook is a kind of Small-deep Hole, main in the hole
Built-up welding is carried out by manual operations.Although the cobalt-base alloys of Stellite 6 is with good wearability, but a kind of remnants should
Power sensitive material, the faying face of wearing layer and matrix control nitrogen austenitic stainless steel is easily ftractureed due to the presence of residual stress；And
During manual build up welding, the technical merit and working condition of operating personnel can influence the carburizing amount of wearing layer, cause abrasion hardness exceeded
And skewness；Therefore the technique is stronger to the dependence of operating personnel, technology stability extreme difference.
Laser gain material manufacturing technology is that three-dimensional structure is decomposed into 2-d plane graph, recycles laser digitizing processing system
Powder rapid melting is shaped X-Y scheme structure by system, successively piles up a kind of brand-new manufacturing process of manufacture product, and laser sinks
Product manufacturing technology is the one kind in laser gain material manufacturing technology.The step of present invention is using laser deposition manufacturing technology manufacture hook
Including：
A, set up hook blank three-dimensional digital model；
B, formulate hook laser deposition fabrication scheme, and logarithmic mode decomposed, cut into slices and laser beam scan path planning；
C, setting laser deposition Fabrication parameter, work out laser deposition manufacturing process control program；
Preparation before d, completion laser deposition manufacture；
E, carry out laser deposition manufacture according to process file；
F, hook blank is cut into separation from substrate, be then heat-treated；
G, roughing is carried out to the hook blank after heat treatment and Non-Destructive Testing is carried out；
H, the hook blank qualified to Non-Destructive Testing are finished, and manufacture finished product hook；
I, size and appearance test are carried out to finished product hook.
The concrete mode of each step is introduced with example below：
A, set up hook blank mathematical model
According to hook finished product mathematical model, hook machining blank mathematical model is designed first；It is special further according to laser deposition technique
Internal soundness of seeking peace detection requires that each machined surface all increases allowance, so as to obtain laser deposition manufacture hook blank
Numerical model；
Hook jaw pin bore dia is in the present inventionφ9.493mm, the square shaped pin hole wearing layer length of side is naturally larger than pin-and-hole diameter, is less than
The width 19mm of hook side.The wear-resisting area of the present invention is respectively adopted the length of side 10.5mm, 14mm and 19mm and is manufactured and designed.
B, formulate hook laser deposition fabrication scheme, and logarithmic mode decomposed, cut into slices and laser beam scan path planning
Three-dimension Numerical Model structure and laser deposition manufacturing technical feature according to blank, design the forming arrangements of blank.According to
The characteristics of hook blank is L-shaped, the present invention is lain low placements upward using briar tooth, along the signified vertical direction successively accumulated growth of arrow
Forming arrangements, as shown in Figure 7；
When being grown according to the program, four different parts are had from bottom to briar tooth.Part I 9 is control nitrogen austenitic
Stainless steel base substrate, Part II 10 be positioned at it is middle with pin-and-hole wearing layer by control nitrogen austenitic stainless steel matrix,
The areas 13 of upper pin-and-hole Stellite 6 and the lower areas 14 of pin-and-hole Stellite 6 constitute, and Part III is that connecting layer is pure controls nitrogen austenitic not
Rust steel 11, Part IV is the briar tooths of Stellite 6 layer 12；
Part I bottom 9, Part III top layer 11 and the Dou Shi homogenous materials area of 6 briar tooth floor of Part IV Stellite 12, the
A part and Part III are all control nitrogen austenitic stainless steels, and Part IV is the cobalt-base alloys of Stellite 6.Slicing treatment compared with
For simple, can with subregion can not also subregion, because hook size is smaller, the section in the present invention to three part is not carried out again
Subregion sets scanning pattern.When section carries out laser beam scan path planning, in order to reduce and cutting down cumulative stress, phase is typically required
The laser beam scan path of adjacent two-layer is wanted angled and is staggered.In the present invention, the laser beam scan path of adjacent two layers section is in 90 °
Vertically；
Part II pin-and-hole wearing layer includes control nitrogen austenitic stainless steel and Stellite 6 cobalt-base alloys, two kinds of materials, totally 5
Region.Therefore, in the present invention, the section of Part II is divided into five areas, as shown in figure 8, wherein 13 and 14 is Stellite 6
Region, its excess-three region is control nitrogen austenitic stainless steel.In the present invention, the width in the areas 13 and 14 of Stellite 6 has three
Kind, it is respectively 10.5mm, 14mm and 19mm；
When laser beam scan path planning is carried out, in addition to the laser beam scan path of adjacent two layers section is angled, with all
The laser beam scan path in adjacent twoth area is also angled in piece.The present invention is in 90 °, as shown in figure 9, Fig. 9（a）And figure
9（b）It is the laser beam scan path planning of two neighboring section；
In planning parameters of scanning paths, sweep span, i.e. laser scanning overlapping rate are set.Between general overlapping rate 30% ~ 50%.This hair
Bright overlapping rate is 40% ~ 45%.
C, setting laser deposition Fabrication parameter simultaneously work out laser deposition manufacturing process control program
The 00Cr18Ni9N control nitrogen austenitic stainless steels of optimization and swashing for the cobalt-base alloys of Stellite 6 are obtained by system experimentation
Light deposition fabrication process parameters.It is as shown in table 1 present invention optimizes three kinds of laser technical parameterses；
The hook laser deposition fabrication process parameters table of table 1
According to technological parameter and section scanning pattern, laser deposition manufacturing process control program is worked out.
Preparation before d, completion laser deposition manufacture
Preparation before laser deposition manufacture, is divided into four aspects：The first step, base material prepares；Second step, workbench prepares；
3rd, raw material prepare；It is finally program prerun；
First it is that base material prepares.Due to laser deposition is control nitrogen austenitic stainless steel, and first-selected base material is exactly to control nitrogen austenitic not
Rust steel board.In view of cost, can be replaced with other stainless steels, such as 12Cr17Mn6Ni5N（201 trades mark）, 12Cr18Mn9Ni5N
（202 trades mark）, 12Cr18Ni9（302 trades mark）, Y12Cr18Ni9（303 trades mark）, 06Cr19Ni10（304 trades mark）Deng.The present invention
Use 06Cr19Ni10 cut deals, thickness 30mm；
Base material is cleaned into degreasing and rust removal, in drying oven inner heating drying, 150 DEG C of drying temperature is incubated 60min.Then to base material
Flash removed, the bright descaling of surface polishing are removed in corner angle polishing；
Second step, workbench prepares.The base material that will be dried and polish is placed on the workbench in laser deposition molding storehouse
And fixed with fixture, argon gas is full of in the shaping storehouse.Laser deposition molding coaxial powder feeding device to the distance of substrate surface is adjusted, really
Guarantor's substrate deposition surface is in the range of laser spot.The beginning and end that setting powder feeder is scanned on base material, limits sweep limits.
Finally confirm the oxygen content in shaping storehouse, laser deposition manufacture could be started when only less than 50ppm；
3rd step, raw material prepare.Raw materials of the present invention be 00Cr18Ni9N control nitrogen austenitic stainless steel powder and
The Co-based alloy powders of Stellite 6.00Cr18Ni9N is controlled nitrogen austenitic stainless steel powder and is prepared using rotation electrode technique, changes
Study and point meet RCC-M standards, granularity is -60 mesh ~ 200 mesh.The Co-based alloy powders of Stellite 6 are prepared for gas atomization
Built-up welding powder, chemical composition meets AWS A5.21 standards, mesh ~ 320 of powder size -100 mesh；
Powder is fitted into the powder feeder of laser deposition digital control system, the powder feeder at least has two powder feeding storehouses, it is possible to achieve
Laser deposition manufacture while at least two dusty materials.Powder feeder used of the invention is carrier gas type powder feeder, and protective gas is
High-purity argon gas, possess three powder feeding storehouses, it is possible to achieve laser deposition while three kinds of dusty materials；
4th step, program prerun.After above-mentioned preparation is completed, under conditions of laser is not opened, operation process control
Program, the accuracy of each equipment operation of inspection numerical control program, lathe, protection gas and powder feeder etc., integrality and reliability, really
That protects hook manufacturing process stablizes controllable.If it find that problem, revision program or equipment, then carry out prerun again immediately,
Untill confirming without any exception.
E, according to setting program file carry out laser deposition manufacture
The present invention has carried out the laser deposition of hook blank according to the process control procedure that the laser technical parameterses of table 1 are worked out respectively
Manufacture.In laser deposition manufacturing process, note observing forming quality, note abnormalities and want instant adjusting process, it is ensured that laser deposition
Process is smoothed out.
F, hook blank is cut into separation from substrate, be then heat-treated
Laser deposition manufacturing technology is due to being that high energy beam transient prediction melts and unstable state solidification forming, and its residual stress is larger,
Stress relief annealing must be carried out；
Nitrogen austenitic stainless steel and Stellite 6 are controlled to laser deposition 00Cr18Ni9N carries out heat treatment experiment, obtains both
Temperature-hardness curve, as shown in Figure 10 and Figure 11, Figure 10 is 6 hardness of laser deposition Stellite-temperature curve, Tu11Wei
Laser deposition 00Cr18Ni9N control nitrogen austenitic stainless steels hardness-temperature curve.According to hardness-temperature curve, the present invention is preferably
The heat treatment temperature of the hook blank of determination is 800 DEG C ~ 1075 DEG C.According to the temperature of selection, insulation 30min is carried out respectively,
45min, 60min, 75min and 90min are contrasted；
To carrying out draftability through 00Cr18Ni9N control nitrogen austenitic stainless steels and the cobalt-base alloys of Stellite 6 after Overheating Treatment
Can test, test result is as shown in table 2；
Laser deposition 00Cr18Ni9N controls nitrogen austenitic stainless steel and the cobalt-base alloys mechanical property of Stellite 6 after table 2 is heat-treated
Energy
As can be seen that the cobalt-base alloys of Stellite 6 of laser deposition manufacture and 00Cr18Ni9N control nitrogen austenitic stainless steels, nothing
By be laser deposition state or heat treatment after, its comprehensive mechanical property all be higher than RCC-M standards；
According to above-mentioned Tensile Test Results, currently preferred hook Technology for Heating Processing is：Heat treatment temperature：800℃~1075
DEG C, soaking time 45min ~ 75min, the type of cooling is with stove Slow cooling.
G, roughing is carried out to the hook blank after heat treatment and Non-Destructive Testing is carried out
Hook blank to completing heat treatment is machined out, and obtains smooth bright and clean surface, surface roughness≤1.6 μm.So
Water logging ultrasonic wave C-scan inspections are carried out to it afterwards, blank internal soundness is confirmed；
The Rockwell hardness of the wearing layers of Stellite 6 is tested in briar tooth area 12, lower pin-and-hole area 14 and upper pin-and-hole area 15, each area surveys
Examination is no less than 3 points.In the present invention, the Rockwell hardness of trizonal Stellite 6 is identical, is HRC43 ± 2.
H, the hook blank qualified to Non-Destructive Testing are machined out, and obtain hook finished product
To checking qualified hook blank to finish.Two sides of processing hook first turn into processing datum, processing
When be necessary to ensure that two sides are vertical with wearing layer faying face, then the datum level bottom 6 regions of Stellite 13 position under
Pin-and-hole axle center 15, then with axle center 15 as basic point, the pin-and-hole axle center 16 in the positioning of 6 regions of Stellite 14 on top, in theory
Axle center 16 should also be the foursquare center in region 14, but have deviation in practice；
Then numerical programming procedure, respectively on the basis of axle center 15 and axle center 16, completes punching and finished product machining.
I, size and appearance test are carried out to hook
Dimension control is carried out to hook finished product using high precision three-dimensional coordinates measurement instrument.The thick of each machined surface is tested using extra coarse degree instrument
Rugosity.Whether there is crackle using osmosis inspection finished product hook.Sight check hook outward appearance is complete under high-brightness environment
Property；
During visual detection, hook surface is not allow for any pit, cracking, crackle, incomplete fusion and slag inclusion；
During liquid penetrating inspection, not in there is any linear display on wear-resisting area and interface（It is a length of wide 3 times）；Do not allow
Have more than the circular displays of 1.5mm, if the minimum thickness required after final machining is less than 1.5mm, the maximum of circular display permits
Perhaps size is the thickness；A Liquid Penetrant has been allowed to show.
The hook manufactured by above-mentioned steps can fully meet the use requirement of nuclear power station CRDM hook.It is logical
Ultrasonic NDT and penetrating inspection are crossed, any excessive defect is not found, wearing layer hardness HRC43 ± 2 meet product technology and want
Ask, and than oxygen-acetylene repairing hook wearing layer hardness evenly.The hook of this method manufacture, laser deposition 00Cr18Ni9N control nitrogen
Austenite stainless steel matrix has and has more preferable comprehensive mechanical property than oxygen-acetylene repairing hook matrix.Production process of the present invention
Fully automated control, manufacturing process and quality are not influenceed by operating personnel, are adapted to batch production, can completely substitute oxy-acetylene heap
Weldering hook.
Claims (16)
1. the nuclear power station CRDM hook that a kind of utilization laser deposition manufacturing technology is manufactured, it is characterised in that：Hook
The wearing layer profile of pin-and-hole is square；Briar tooth is planar structure with the faying face of matrix.
2. the laser deposition manufacturer of the nuclear power station CRDM hook of the novel wear resistant Rotating fields described in claim 1
Method, comprises the following steps：
S1：Set up hook blank three-dimensional digital model；
S2：Hook laser deposition fabrication scheme is formulated, and logarithmic mode is decomposed, cut into slices and laser beam scan path planning；
S3：Setting laser deposition Fabrication parameter and basketry control program；
S4：Complete preparation before laser deposition manufacture；
S5：Program according to setting carries out laser deposition manufacture；
S6：Hook blank is separated from substrate cut, is then heat-treated；
S7：Hook blank after heat treatment is machined out, hook finished product is obtained.
3. the square hook jaw pin porose area wearing layer described in claim 1, it is characterized in that：The length of side is not less than 10.5mm, no more than
19.0mm。
4. hook laser deposition manufacture method S2 steps described in claim 2, it is characterised in that：
S2-1：Flat manner of the hook blank with briar tooth upward grows；
S2-2：Hook blank digital-to-analogue is divided into bottom, pin-and-hole layer, four part of connecting layer and briar tooth layer；Bottom is hook matrix
Area；Pin-and-hole layer is the corresponding hook body midsection point of pin-and-hole wearing layer；Connecting layer is between pin-and-hole layer top and briar tooth layer
Matrix region；Briar tooth layer is briar tooth wearing layer；
S2-3：Four parts are cut into slices respectively；
S2-4：Subregion is carried out to section, and plans the laser beam scan path of each subregion；
S2-5：The section of establishment hook blank and laser deposition fabrication schedule file.
5. laser deposition manufacture hook blank S3 steps set laser deposition Fabrication parameter described in claim 2, it is characterised in that：
Laser spot diameter is φ 2mm ~ φ 6mm, and laser power is 1kw ~ 5Kw, laser scanning speed 3mm/s ~ 30mm/s, laser scanning
Overlapping rate is 30% ~ 50%, and slice thickness is 0.5mm ~ 2.0mm.
6. laser deposition described in claim 2 manufactures hook blank S4 steps, it is characterised in that：
S4-1：To base material degreasing, surface polishing scale removal, then cleaning, drying；
S4-2：Base material is placed on the workbench in the laser deposition molding storehouse of argon atmospher protection and fixed, adjustment powder feeder
To the distance of substrate surface, and set the beginning and end of laser scanning；
S4-3：Laser deposition manufacture hook blank is loaded into powder feeder with raw material powder；
S4-4：Carry out the reasonability of laser deposition fabrication schedule prerun, testing equipment operation accuracy and program operation.
7. laser deposition described in claim 2 manufactures hook blank S5 steps, it is characterised in that：According to bottom --- pin-and-hole
The order of layer --- connecting layer --- briar tooth layer carries out laser deposition manufacture.
8. laser deposition described in claim 2 manufactures the heat treatment of hook blank S6 steps, it is characterised in that：Heat treatment temperature is situated between
Between 800 DEG C ~ 1075 DEG C, soaking time 45min ~ 75min, the type of cooling is furnace cooling.
9. the machining of S7 steps described in claim 2, it is characterised in that：
S7-1：Datum level is processed --- and two sides of Milling Machining hook blank turn into processing datum；
S7-2：Pin-and-hole axle center positions --- orientate the wear-resisting district center position of pin-and-hole square under datum level as pin-and-hole axle center, then
According to size requirement pin-and-hole axle center is positioned in the wear-resisting area of upper pin-and-hole square；
S7-3：Punching --- with the axle center set it is machining center, hole milling is carried out in wearing layer area；
S7-4：Then the numerical programming procedure on the basis of upper and lower pin-and-hole axle center, completes the machining of hook.
10. S2-3 digital-to-analogues section described in claim 4, it is characterised in that：At least it is divided into three scannings in pin-and-hole layer slice plane
Subregion --- matrix area, lower pin-and-hole high-abrasive material area and upper pin-and-hole high-abrasive material area；High-abrasive material area is with the hook pin bore axis heart
Centered on square；The square length of side width is between 10.5mm ~ 19mm.
S2-4 laser beam scan paths planning described in 11. claims 4, it is characterised in that：The laser of same section different zones is swept
Retouching path can mutually be mutually perpendicular to, it is also possible to be parallel to each other；The laser beam scan path of adjacent two layers section can also may be used with identical
With at an angle, such as 90 °.
The base material of S4-1 steps described in 12. claims 6, it is characterised in that：Base material is stainless steel, such as 12Cr17Mn6Ni5N,
12Cr18Ni9, Y12Cr18Ni9, Y12Cr18Ni9Cu3,06Cr19Ni10,00Cr18Ni9-N.
S4-3 laser depositions manufacture hook blank raw material powder described in 13. claims 6, it is characterised in that：Main body raw material
Powder is this body powder of stainless steel of 00Cr18Ni9-N control nitrogen Austria；Wearing layer raw material powder is the cobalt-based alloy powders of Stellite 6
End.
The powder feeder of S4-3 steps described in 14. claims 6, it is characterised in that：Powder device at least possesses two powder feeding storehouses of sealing.
This body powder of stainless steel of 00Cr18Ni9-N controls nitrogen Austria described in 15. claims 13, it is characterised in that：The material powder
Manufacture method is rotary electrode method or gas atomization.
The Co-based alloy powders of Stellite 6 described in 16. claims 13, it is characterised in that：The manufacture method of the material powder is
Rotary electrode method or gas atomization.
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| CN107578830A (en) * | 2017-08-21 | 2018-01-12 | 苏州热工研究院有限公司 | A kind of CRDM hooks performance fast testing system |
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