CN106555182B - A kind of restorative procedure of combustion engine turbine rotor wheel hub tongue-and-groove - Google Patents
A kind of restorative procedure of combustion engine turbine rotor wheel hub tongue-and-groove Download PDFInfo
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- CN106555182B CN106555182B CN201510612633.2A CN201510612633A CN106555182B CN 106555182 B CN106555182 B CN 106555182B CN 201510612633 A CN201510612633 A CN 201510612633A CN 106555182 B CN106555182 B CN 106555182B
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- cladding
- tenon tooth
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- tooth
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
Abstract
A kind of restorative procedure of combustion engine turbine rotor wheel hub tongue-and-groove, includes following steps：（1）The preprosthetic detection of tenon tooth slot；（2）Making standard length bar measures tongue-and-groove size at different levels, calculates wear extent；（3）Damage location is cleared up according to testing result, is derusted, confirms flawless defect；（4）Reflective sheeting is made according to tenon tooth slot form, baffle is close to working face as possible；（5）Wheel disc tenon tooth non-working surface laser melting coating；（6）Mechanical complex；（7）Using application specific standard length bar, tenon slot size is detected；（8）Nondestructive inspection detects：Carrying out flaw detection is carried out to cladding layer using flaw detection agent, it is ensured that flawless, stomata, dreg defect after flaw detection.
Description
Technical field
The present invention relates to a kind of restorative procedures of combustion engine turbine component, more particularly to a kind of to utilize laser melting and coating technique to combustion
The method that the non-contact surface damage of machine turbine wheel hub tongue-and-groove is repaired.
Background technology
Gas turbine is a kind of novel motive power machine risen in 20th century, and existing gas turbine is heated by isobaric combustion
Open circulation work, it is made of compressor, combustion chamber and turbine, is directly to convert the thermal energy that fuel combustion generates
The swinging dynamic power machine externally exported at mechanical work.With small, light weight, starting is fast, efficient, disposal of pollutants is low etc.
Remarkable advantage.It is run for for peak load regulation network, is chronically at low speed jiggering, lead to turbine rotor wheel hub and movable vane piece and tenon tooth
Mating surface serious wear, blade is more than to use standard with wheel hub fit clearance, if repairing not in time, be easy to cause blade abjection thing
Therefore.Therefore, how low cost, the solution of high yield this technical barrier, become when the important and real problem of previous item.
Laser remanufacturing has its unique excellent as the forward position high-end technology for remanufacturing industry in terms of geometry recovery
Point, is mainly manifested in that high degree of automation, heat input be small, restoring area is had excellent performance, and the reparation for combustion engine wheel hub tenon tooth provides
Feasible approach.
Currently, carry out the patent of part of appliance reparation about laser remanufacturing technology and report very much, such as.
What the Chinese invention patent application of Publication No. CN101338427 provided《Hydraulic support column cylinder, piston rod are resistance to
Grind the laser melting and coating process of etch-resistant coating》, including following technical process：Column cylinder, piston rod surface pretreatment first：Room temperature
Lower column cylinder barrel, piston rod surface carry out oil removing, derusting, are used in combination alcohol washes clean；Then the selection of alloy powder and from
The adjusting of dynamic dust feeder：Select with good wear etch resistant properties and with the good fe-based alloy powder of matrix metallurgy compatibility
End mainly contains Fe, C, Cr, Ni, Mo, Si, N, Nb, Ta, B in the composition of iron(-)base powder；Last automatic powder feeding device
It adjusts：Automatic powder feeding device is adjusted, the alloy powder that automatic powder feeding head comes out is made just to fall in laser molten pool, adjusts powder feeding
Amount, makes the thickness of alloy powder coating reach 0.6-1.2mm.
What the Chinese invention patent application of Publication No. CN101100746 provided《Carburization-like overloading tooth component tooth surface laser
Cladding dusty material and restorative procedure》, which includes the substance of following mass percent：0.80-1.10%C, 7.50-
9.00%Mn, 0.90-1.30%Cr, 0.20-0.35%Mo, 2.00-3.50%B, 2.50-3.50%Si, impurity P≤
0.06%, impurity S≤0.04%, remaining non-Fe；Powder size is the mesh of -140 mesh~+260.The laser melting coating unit interval acts on energy
Metric density is 1.0 × 108W/m2~109W/m2。
Though the above-mentioned technical proposal that the prior art provides can repair equipment component component using laser melting and coating process,
And overcome asking for crackle, stomata and microstructure inhomogeneities existing for laser cladding layer by preparing cladding material appropriate
Topic, obtains certain technique effect, but there are some technical problems are urgently to be resolved hurrily for the wheel hub tenon tooth reparation of combustion engine turbine.
1. the control of laser melting coating layer thickness.Since the bulk of combustion engine turbine wheel hub tongue-and-groove is small, to laser melting coating thickness
Degree requires high, only 0.1mm, and same tooth surface damage degree is different, and air inlet side wear extent is small, and outlet lateral wearing amount is big, damage
It measures inclined, how to become controlling thickness by adjusting automatic powder feeding system and related powder feeding parameter and repair one of difficult point.
2. the guarantee of clad layer surface flatness.Since the size to rotor hub tenon tooth requires height, and after cladding not
Can be machined, thus how accurate adjusting process parameter, ensure cladding face flatness become repair another difficulty
Point.
3. the selection of laser incident angle.Combustion engine wheel hub tenon tooth it is complex-shaped, in laser cladding process, selection most
Good laser incident angle is the key that ensure cladding effect.
4. the protection in non-cladding region.In laser cladding process, the strong reflection effect of laser can badly damaged non-cladding
Region.Therefore, it is a factor that can not ignore to the protection in non-cladding region.
5. the influence of heat affected area.The size of heat affected area directly influences the mechanical property of the tenon tooth after laser melting coating,
It is very stringent to the size requirements of heat affected area after cladding since the combustion engine wheel hub tenon tooth thickness being repaired is only 3mm.
It retrieves and investigates through the applicant：Precedent there is no to the combustion engine turbine tenon tooth reparation country by the way of laser melting coating,
Foreign countries also do not see relevant report.Therefore, laser cladding method appropriate is searched out to combustion engine turbine tenon tooth reparation, still needs to institute
The technical staff in category field further makes creative research work.
Invention content
It is an object of the invention to solve the above problem of the existing technology, by Improvement repeatedly, one is given
The restorative procedure of kind of combustion engine turbine wheel hub tenon tooth, the method achieve the reparation of combustion engine turbine wheel hub tenon tooth, and renovation technique
It is easy to operate, adaptable, thermal deformation is small, normative strong, the tenon tooth after reparation meets requirement, reduces same period turbine and turns
The wear extent of sub- tenon tooth has huge value to the reduction of combustion engine turbine use cost.
The recovery scenario design criteria that the present invention provides.
1. ensuring the bond strength of cladding layer and matrix, do not fall off in use, and can reach corresponding micro-
Tissue and mechanical property requirements.
2. in view of movable vane wheel hub is high in face of machining accuracy and straightness requirement with blade root functional contact, scene does not have
Therefore repairing condition only repairs the inoperative contact plane of wheel hub tenon tooth.
3. strictly control cladding layer thickness is 0.1mm per layer thickness, same cladding layer height gap control is in 0.05mm
Within, it avoids being machined out tenon tooth level after laser melting coating.
4. carrying out the design of specific coatings, it is desirable that point 3 layers of stepped cladding, it is every layer long per layer thickness in 0.1mm or so
Degree is followed successively by 30mm, 80mm, 160mm from top to bottom, it is ensured that tenon tooth long-term operation.
5. controlling the thickness of heat affected area, it is desirable that the thickness of heat affected area is not more than 0.2mm, to meet tenon tooth mechanical property
It is required that.
6. the best cladding material of selection makes polishing machine reach requirement.The selection principle of material is cladding material
Wear resistance is better than wheel disk substrate, and is less than movable vane sheet material.
The technique repair process that the present invention provides.
1. the preprosthetic detection of tenon tooth slot：Content includes tenon tooth own dimensions, hardness, nondestructive inspection detection.
2. making standard tests stick, the size of tongue-and-grooves at different levels is measured, calculates wear extent.
3. the defects of being cleared up damage location, derusted according to testing result, confirming flawless.
4. making reflective sheeting according to tenon tooth groove shape, baffle selects the copper sheet of 0.1mm thickness, and baffle cannot be blocked up, otherwise
Incident light can be influenced, baffle is close to working face as possible.
5. it is molten to carry out single side to the tenon tooth cladding position 6 of each tenon tooth slot upper surface for wheel disc tenon tooth non-working surface laser melting coating
It covers, laser melting coating parameter is：Static spot diameter 1-3mm overlaps 0.3-1mm, sweep speed 30-80mm/s, power 2500-
5000W, bare headed angle vertically 25-35 degree, from top to bottom, preceding 2 slot（First tenon tooth 2 and the second tenon tooth 3）Bare headed angle
For 25-30 degree, rear 1 slot（That is third tenon tooth 4）Bare headed angle is 30-35 degree.Automatic powder feeding system is the preset powder feeding of gravity, and powder sending quantity is
0.8-2.5g/min, speed 20-50mm/s, overlap 1-3mm, and powder feeding nozzle is oriented gullet base circular arc.Preceding 2 slot is along tooth top
To bottom of the tooth direction cladding 5mm, rear 1 slot cladding 4mm.Point three layers of cladding of having a shave are waited to each, first 2 layers（First cladding layer 7, second
Cladding layer 9）Cladding thickness is 0.1mm, the 3rd layer（Third cladding layer 10）Cladding thickness is according to amount of damage difference cladding thickness
0.1-0.2mm, the combustion engine wheel disc tenon tooth repair surface after cladding are distributed in ladder.
6. pincers repair shape.After the completion of first cladding layer 7,9 laser melting coating of the second cladding layer, clamping the method repaiied by hand will
Clad layer surface polishes, and removes oxide, exposes metallic luster；After the complete third cladding layer of cladding 10, reconditioning is carried out to cladding layer,
The control of clad layer surface flatness is used in combination blade to carry out installation experiment within 0.05mm after ensureing reconditioning, ensures that blade can
It passes through.
7. testing stick using standard, tenon slot size is detected.
8. nondestructive inspection detects：Carrying out flaw detection is carried out to cladding layer using flaw detection agent, it is ensured that flawless after flaw detection, stomata,
The defects of slag inclusion.
Compared with prior art, advantageous effect of the present invention.
1. solving the thickness control of complex-shaped tenon tooth damage surface heeling condition laser melting coating, cladding face ensure that
Flatness.
2. controlling the size of laser melting coating heat affected area well, the mechanical property of tenon tooth after cladding ensure that.
3. protecting non-cladding region without damage simultaneously.
Description of the drawings
Fig. 1 is the detection method schematic diagram for measuring tongue-and-groove sizes at different levels.
Fig. 2 is wheel disc tenon tooth non-working surface laser melting coating position schematic diagram.
Fig. 3 is layering laser melting coating schematic diagram.
It is marked in figure：1：Test stick, 2：First tenon tooth, 3：Second tenon tooth, 4：Third tenon tooth, 5：Distance, 6：Tenon tooth cladding portion
Position, 7：First cladding layer, 8：Damage surface, 9：Second cladding layer, 10：Third cladding layer, 11：Movable vane piece and tongue-and-groove theoretical contact
Face.
Specific implementation mode
Shanghai electricity generating corporation, Ltd, second, third grade of movable vane wheel hub tongue-and-groove non-working surface of 9E unit combustion engine turbine rotor
Laser repairing, material be 15CrMo V.Repair before due to gas turbine long low jiggering cause turbine rotor second, third
The mating surface serious wear of grade wheel hub and movable vane piece blade root tongue-and-groove, fit clearance are more than standard allowable.And the abrasion of wheel hub tongue-and-groove
It is irregular wear, amount of damage is inclined.Tongue-and-groove air inlet side wear extent is about 0.1mm.Outlet lateral wearing amount：First order tooth
For 0.35mm, second level tooth is 0.30mm, and third level tooth is 0.25mm.
The technique repair process that the present invention provides.
1. the preprosthetic detection of tenon tooth slot：Content include detect the first tenon tooth 2, the second tenon tooth 3, third tenon tooth 4 itself
Size and hardness, nondestructive inspection detection.
2. making standard tests stick 1, tongue-and-groove size at different levels is measured, wear extent is calculated.Detection method is as shown in Figure 1, test stick
Size is fixed, and is measured each tenon interdental space by testing stick, size between every grade of tenon tooth is obtained, repairing rear tenon tooth to Assurance of Size like this
Distance.
3. the defects of being cleared up damage location, derusted according to testing result, confirming flawless.
4. making reflective sheeting according to tenon tooth slot form, baffle selects the copper sheet of 0.1mm thickness, and baffle cannot be blocked up, no
Incident light can be then influenced, baffle is close to working face as possible.
5. wheel disc tenon tooth non-working surface laser melting coating, tenon tooth cladding position 6 sees that Fig. 2, laser melting coating parameter are：Static hot spot
Diameter 1.5mm, overlaps 0.5mm, sweep speed 50mm/s, power 3600W, bare headed angle vertically 25-35 degree, from up to
Under, preceding 2 slot（That is the first tenon tooth 2 and the second tenon tooth 3）Bare headed angle is 28 degree, rear 1 slot（That is third tenon tooth 4）Bare headed angle is 32
Degree.Automatic powder feeding system is the preset powder feeding of gravity, and powder sending quantity 1.2g/min, speed 30mm/s overlap 2mm, powder feeding nozzle direction
For gullet base circular arc.Preceding 2 slot is along tooth top to bottom of the tooth direction cladding 5mm, rear 1 slot cladding 4mm.To it is each wait having a shave points three layers it is molten
It covers, i.e. the first cladding layer 7, the second cladding layer 9, third cladding layer 10, first 2 layers（First cladding layer 7, the second cladding layer 9）Cladding
Thickness is 0.1mm, the 3rd layer（Third cladding layer 10）Cladding thickness is according to amount of damage difference 0.1-0.2mm, the combustion after cladding
Wheel disk tenon tooth repair surface is distributed in ladder.It is as shown in Figure 3 to be layered laser melting coating situation.
6. pincers repair shape.After complete first cladding layer 7 of cladding, the second cladding layer 9, mechanically clad layer surface is ground
Light removes oxide, exposes metallic luster；After the complete third cladding layer of cladding 10, reconditioning is carried out to cladding layer, is melted after ensureing reconditioning
Clad surface flatness controls within 0.05mm, and blade is used in combination to carry out installation experiment, ensures that blade can pass through.
7. utilizing application specific standard length bar, tenon slot size is detected.
8. nondestructive inspection detects：Carrying out flaw detection is carried out to cladding layer using flaw detection agent, it is ensured that flawless after flaw detection, stomata,
The defects of slag inclusion.
The control of tenon tooth gap size is accurate after reparation, and cladding layer hardness number is close with base material, is not more than HB300.Cladding layer
Dense structure, and without slag inclusion, crackle, more than the stomata of 0.5mm the defects of.Non- cladding face is without any damage.Power plant is to using
The unit that the turbine rotor of laser melting coating repairing exchanges new turbine rotor with other the same year is compared into line trace, molten through laser
It is about 1/10th of new rotor to cover rotor tenon tooth and blade root same period wear extent after repairing.
Claims (1)
1. a kind of restorative procedure of combustion engine turbine rotor wheel hub tongue-and-groove, it is characterised in that include following steps：
（1）The preprosthetic detection of tenon tooth slot：Content includes each tenon tooth own dimensions, hardness, nondestructive inspection detection；
（2）Making standard tests stick, measures tongue-and-groove size at different levels, calculates wear extent；
（3）Damage location is cleared up according to testing result, is derusted, confirms flawless defect；
（4）Reflective sheeting is made according to tenon tooth slot form, baffle selects the copper sheet of 0.1mm thickness, and baffle cannot be blocked up, otherwise can
Incident light is influenced, baffle is close to working face as possible；
（5）Wheel disc tenon tooth non-working surface laser melting coating carries out single side cladding to tenon tooth slot upper surface, and laser melting coating parameter is：
Static spot diameter 1-3mm overlaps 0.3-1mm, sweep speed 30-80mm/s, power 2500-5000W, bare headed angle edge
Vertical direction 25-35 degree, from top to bottom, preceding 2 slot i.e. the first tenon tooth（2）With the second tenon tooth（3）, bare headed angle is 25-30 degree, after
1 slot, that is, third tenon tooth（4）, bare headed angle is 30-35 degree, and automatic powder feeding system is the preset powder feeding of gravity, powder sending quantity 0.8-2.5g/
Min, speed 20-50mm/s, overlap 1-3mm, and powder feeding nozzle is oriented gullet base circular arc, preceding 2 slot i.e. the first tenon tooth（2）With
Second tenon tooth（3）, along tooth top to bottom of the tooth direction cladding 5mm, rear 1 slot, that is, third tenon tooth（4）, cladding 4mm waits having a shave point to each
Three layers of cladding, first 2 layers i.e. the first cladding layer（7）, the second cladding layer（9）, cladding thickness is 0.1mm, the 3rd layer of i.e. third cladding
Layer（10）, cladding thickness is 0.1-0.2mm according to amount of damage difference cladding thickness, and the combustion engine wheel disc tenon tooth repair surface after cladding is in
Ladder is distributed；
（6）It clamps and repairs shape, after the completion of the 1st, the 2nd layer of laser melting coating, clamp the method repaiied by hand and polish clad layer surface, remove
Oxide exposes metallic luster；After complete 3rd layer of cladding, reconditioning is carried out to cladding layer, ensures clad layer surface flatness after reconditioning
Control is used in combination blade to carry out installation experiment within 0.05mm, ensures that blade can pass through；
（7）Stick is tested using standard, detects tenon slot size；
（8）Nondestructive inspection detects：Carrying out flaw detection is carried out to cladding layer using flaw detection agent, it is ensured that flawless, stomata, slag inclusion after flaw detection
Defect.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510612633.2A CN106555182B (en) | 2015-09-24 | 2015-09-24 | A kind of restorative procedure of combustion engine turbine rotor wheel hub tongue-and-groove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510612633.2A CN106555182B (en) | 2015-09-24 | 2015-09-24 | A kind of restorative procedure of combustion engine turbine rotor wheel hub tongue-and-groove |
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| CN106555182B true CN106555182B (en) | 2018-08-07 |
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| CN111041472A (en) * | 2019-11-28 | 2020-04-21 | 上海大陆天瑞激光表面工程有限公司 | Laser replication process method for mortise of hub of ground gas turbine |
| CN111334792A (en) * | 2020-04-10 | 2020-06-26 | 西安灯芯草信息科技有限公司 | Method for repairing and strengthening turbine machinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1191788A (en) * | 1997-02-25 | 1998-09-02 | 中国科学院金属腐蚀与防护研究所 | Laser reparation method of ablated worm gear disc of smoke exhauster in oil refinery |
| CN101518842A (en) * | 2008-02-29 | 2009-09-02 | 通用电气公司 | Hub pitch gear repair method |
| CN101629289A (en) * | 2009-07-22 | 2010-01-20 | 岳阳大陆激光技术有限公司 | Laser anti-corrosion and wear-resistant process for trunnion of movable guide vanes of turbines |
| CN102031513A (en) * | 2009-09-28 | 2011-04-27 | 沈阳大陆激光技术有限公司 | Restoring method of last-stage blade of steam turbine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050178750A1 (en) * | 2004-02-13 | 2005-08-18 | Kenny Cheng | Repair of article by laser cladding |
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2015
- 2015-09-24 CN CN201510612633.2A patent/CN106555182B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1191788A (en) * | 1997-02-25 | 1998-09-02 | 中国科学院金属腐蚀与防护研究所 | Laser reparation method of ablated worm gear disc of smoke exhauster in oil refinery |
| CN101518842A (en) * | 2008-02-29 | 2009-09-02 | 通用电气公司 | Hub pitch gear repair method |
| CN101629289A (en) * | 2009-07-22 | 2010-01-20 | 岳阳大陆激光技术有限公司 | Laser anti-corrosion and wear-resistant process for trunnion of movable guide vanes of turbines |
| CN102031513A (en) * | 2009-09-28 | 2011-04-27 | 沈阳大陆激光技术有限公司 | Restoring method of last-stage blade of steam turbine |
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Effective date of registration: 20190510 Address after: Room A-171, Building 1758 Luchaogang Road, Nanhui New Town, Pudong New District, Shanghai Patentee after: Shanghai continental Laser Surface Engineering Co., Ltd. Address before: 110136 No. 29 Shenbei Road, Deyi Economic Development Zone, Shenyang New District, Shenyang City, Liaoning Province Patentee before: Dalu Laser Technology Co., Ltd., Shenyang |
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