CN107675168A - Laser melting coating restorative procedure after steam circulation pump seal surface wear - Google Patents
Laser melting coating restorative procedure after steam circulation pump seal surface wear Download PDFInfo
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- CN107675168A CN107675168A CN201710840561.6A CN201710840561A CN107675168A CN 107675168 A CN107675168 A CN 107675168A CN 201710840561 A CN201710840561 A CN 201710840561A CN 107675168 A CN107675168 A CN 107675168A
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- circulation pump
- steam circulation
- pump seal
- seal face
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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
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of reproducing method in steam circulation pump seal face, the laser remanufacturing method after particularly a kind of petrochemical industry steam circulation pump seal surface wear, its step are：Steam circulation pump seal face is cleaned, removes sealing surface fatigue layer, detection repairs spot size, determines damage location and its wear extent：Material analysis and hardness determination are carried out to steam circulation pump, failure analysis and life appraisal are carried out to workpiece using metallographic detection：The relevant parameter of powder and laser is selected according to testing result and then cladding is carried out to steam circulation pump seal face：It is machined as requested：Surface dye penetrant inspection and integral ultrasonic flaw detection are carried out to the workpiece after processing, and the roughness of sealing surface is detected.This method has wearability good, and resistance to cavitation, high temperature modification amount is small, and phenomena such as chip off-falling will not be produced in use, come off.
Description
Technical field
The present invention relates to the restorative procedure in steam circulation pump seal face, more particularly to a kind of petrochemical industry steam circulation pump
Laser melting coating reproducing method after sealing surface wear.
Background technology
In the steam circulation pump that petrochemical industry uses, due to bearing the effect of high temperature and high pressure steam in operation process, close
Seal it is bad in the case of sealing surface be easy to cavitation, abrasion, or even there is cavitation groove.High steam pump both domestic and external is adopted mostly
With carbon and alloying element content it is higher as:The materials such as 1Cr13,2 Cr13, ZGCr17Ni3,4Cr13 integrally manufacture, Ran Houtong
The heat treatments such as surface hardening are crossed to reach 50~54HRC hardness requirement, therefore, manufacturing cost is high, after failure by
It is just difficult into petrochemical industry great tackling key problem urgently to be resolved hurrily in the exploitation repaired with remanufacture the material that difficulty is larger, and height is anti-corrosion
Topic.Due to repair difficulty it is very big, even if also being difficult to meet requirement using conventional method reparation, thus at present to abrasion after
Steam circulation pump, which is typically all done, scraps processing.Selection laser melting coating is repaired to steam circulation pump seal face to be coordinated accordingly again
Repair materials and Technology for Heating Processing, it is a significant job.
The content of the invention
It is an object of the invention to for prior art defect, there is provided a kind of wearability is good, repair layer crackle is few, cladding layer
Laser melting coating restorative procedure after the steam circulation pump seal surface wear high with mother metal fusion rate.
Realizing the technical scheme that foregoing invention purpose uses is：
A kind of laser melting coating restorative procedure after steam circulation pump seal surface wear, including stove, the laser used in repair process
Device, it is characterised in that laser melting coating restorative procedure comprises the steps：
First step prepares before repairing
A. steam circulation pump seal face is cleaned, each portion's size is detected, determines damage location and its wear extent；
B. failure analysis is carried out to steam circulation pump seal face and metallographic detects；
C. the fatigue layer at steam circulation pump seal surface damage position is removed, fatigue layer is cleaned out to the new machined surface of appearance；
D. the hardness and chemical composition in steam circulation pump seal face are detected；
E. the pre-heat treatment is carried out to steam circulation pump seal face；
Second step repair process
F. selected to repair the alloy powder of steam circulation pump seal face reparation according to step d testing result；
G. data, the parameter of laser are adjusted according to the result of first step；
H. with laser by alloy powder cladding in steam circulation pump seal face, form cladding layer;
Isothermal holding after the reparation of 3rd step
I. it is machined, welding steam circulation pump seal face, follows steam after the completion of welding as requested to repairing position
Ring pump seal face enters stove and carries out isothermal holding, and charging temperature is 180 DEG C, is incubated 6-8h, then furnace cooling to room temperature；
Detection after the reparation of 4th step
J. surface is repaired to steam circulation pump seal face and carries out dye penetrant inspection and ultrasonic examination;
K. hardness determination is carried out to the steam circulation pump seal face after reparation.
Preferably, the dust, incrustation scale, corrosion in cleaning steam circulation pump seal face are cleared up.
Preferably, the thickness for removing steam circulation pump seal surface damage position fatigue layer is 0.5-1mm
Preferably, the preheating temperature that the pre-heat treatment is carried out to steam circulation pump seal face is 150-200 DEG C.
Preferably, the preheating temperature for the pre-heat treatment being carried out to steam circulation pump seal face is 180 DEG C.
Preferably, select to repair according to step d testing result the chemistry of the alloy powder in steam circulation pump seal face into
It is divided into：w (C) 1.0% 、 w (Si)3.5% 、 w (B)3.5% 、 w (Cr)17.0% 、w (N i)58% 、 w (Fe)
17.0%, above-mentioned powder is mixed and forms alloy powder loaded in container.
Preferably, the power of the regulation laser is 6kw, spot diameter 0.5-2mm, overlapping rate 33.3%, scans speed
Spend 18mm/s.
Preferably, isothermal holding technique is carried out to steam circulation pump seal face enters stove furnace temperature temperature for 180 DEG C.
Preferably, the soaking time for isothermal holding technique being carried out to steam circulation pump seal face is 6 hours.
Using above-mentioned technical proposal, compared with prior art, this method passes through the technical performance to steam circulation material pump
Analysis, it is determined that the arrangement and method for construction of laser melting coating reparation, and specific renovation technique is proposed, it is smooth using laser melting and coating technique
Complete the reparation to steam circulation pump seal face.Steam circulation pump seal surface hardness after cladding is higher than mother metal 5- itself
10HRC, dense structure, crystal grain is tiny to have high good resistance to pitting and heat endurance, intensity, cladding layer and mother metal Percentage bound
It is high, be not easy chip off-falling, come off, wearability is good, and high temperature modification amount is small, and phenomena such as will not produce chip off-falling in use, come off.
Embodiment
With reference to embodiment, the present invention will be further described.
Following examples are used to illustrate the present invention, but can not be used for limiting the scope of the invention.Bar in embodiment
Part can be adjusted according to actual conditions is further, under the concept thereof of the present invention to method simple modifications of the invention all
Belong to the scope of protection of present invention.
Specific embodiment
A kind of laser melting coating restorative procedure after steam circulation pump seal surface wear, its step are：
First step prepares before repairing
A. steam circulation pump seal face is cleaned, the dust, incrustation scale, corrosion in steam circulation pump seal face are cleaned；
B. failure analysis is carried out to steam circulation pump seal face workpiece and metallographic detects；Spot size is repaired in detection, it is determined that damage
Position and its wear extent：Material analysis and hardness determination are carried out to steam circulation pump, workpiece failed using metallographic detection
Analysis and life appraisal：
C. steam circulation pump seal surface damage position fatigue layer 1mm is removed, fatigue layer is cleaned out to the new machined surface of appearance；
D. the hardness and chemical composition in steam circulation pump seal face are detected；
E. the pre-heat treatment is carried out to steam circulation pump seal face, preheating temperature is 150-200 DEG C.
Second step repair process
F. selected to repair the alloy powder in steam circulation pump seal face according to step d testing result, the present embodiment is from Ni-based
Alloy powder, the chemical composition of tungsten-base alloy powder are：w (C) 1.0% 、 w (Si)3.5% 、 w (B)3.5% 、 w
(Cr) 17.0%, above-mentioned powder is mixed and is placed in container by w (N i) 58%, w (Fe) 17.0%.G. according to first step
As a result data, the parameter of laser are adjusted；The power of regulation laser is 6kw, spot diameter 0.5-2mm, overlapping rate
33.3%, sweep speed 18mm/s.
H. with laser by the powder melting in container in steam circulation pump seal face, form the cladding that thickness is 0.5mm
Layer.
Isothermal holding after the reparation of 3rd step
I. it is machined, welding steam circulation pump seal face, steam is followed after the completion of welding to repairing position as requested
Ring pump seal face enters stove and carries out isothermal holding, and charging temperature is 180 DEG C, is incubated 6-8h, then furnace cooling to room temperature.
Detection after the reparation of 4th step
J. surface dye penetrant inspection is carried out to the steam circulation pump seal face after processing and integral ultrasonic is detected a flaw;
K. hardness determination is carried out to the steam circulation pump seal face after reparation, and the roughness of sealing surface is detected.
Specific embodiment
A kind of steam circulation pump seal face cavitation of certain petrochemical plant, the laser cladding method of abrasion, first have to pair before reparation
Steam circulation pump is cleaned, dried：Each spot size is detected, determines damage location and its wear extent；It is close to steam circulation pump
Front cover carries out failure analysis and life appraisal, according to repair content repair text specified restoration technique, man-hour；Damage location fatigue layer removes
0.7mm is to there is new machined surface.The material and hardness of mother metal are detected, steam circulation pump seal plane materiel matter is ZG2Cr13, hardness
For 48-52HRC.
During reparation：Powder, this steam are repaired according to steam circulation pump seal face quality of parent material and hardness selection
Circulating pump sealing face repairing alloy powder selects tungsten-base alloy powder, and its chemical composition and weight by volume ratio are：w (C)
1.0%、w (Si)3.5% 、 w (B)3.5% 、 w (Cr)17.0% 、w (N i)58% 、 w (Cr)17.0%。
These powder are mixed to load in container and form tungsten-base alloy powder.
Data, the parameter of laser are adjusted according to testing result, laser power 6kw, spot diameter 0.5-2mm, is taken
Meet rate 33.3%, sweep speed 18mm/s.
With laser by Co-based alloy powder cladding in steam circulation pump seal face, it is 0.5mm claddings to form a layer thickness
Layer.
Steam circulation pump seal face is machined according to drawing requirement, welding steam circulation pump seal face, welding
After the completion of steam circulation pump seal face is entered into stove isothermal holding is carried out to steam circulation pump seal face, handling process is：Furnace temperature 180
DEG C, it is incubated 7h, then furnace cooling to room temperature
After being repaired to steam circulation pump, dye penetrant inspection is carried out to the steam circulation pump seal face surface processed and ultrasonic wave is visited
Wound, there is zero defect in detection steam circulation pump seal face, and carries out hardness determination and Metallographic Analysis to sealing surface, examines it to repair matter
Whether amount is qualified.
Although above the present invention is described in detail with a general description of the specific embodiments,
On the basis of the present invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Cause
This, these modifications or improvements, belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.
Claims (10)
1. the laser melting coating restorative procedure after a kind of steam circulation pump seal surface wear, including used in repair process stove, swash
Light device, it is characterised in that laser melting coating restorative procedure comprises the steps：
First step prepares before repairing
A. steam circulation pump seal face is cleaned, each portion's size is detected, determines damage location and its wear extent；
B. failure analysis is carried out to steam circulation pump seal face and metallographic detects；
C. the fatigue layer at steam circulation pump seal surface damage position is removed, fatigue layer is cleaned out to the new machined surface of appearance；
D. the hardness and chemical composition in steam circulation pump seal face are detected；
E. the pre-heat treatment is carried out to steam circulation pump seal face；
Second step repair process
F. selected to repair the alloy powder in steam circulation pump seal face according to step d testing result；
G. data, the parameter of laser are adjusted according to the result of first step；
H. with laser by alloy powder cladding in steam circulation pump seal face, form cladding layer;
Isothermal holding after the reparation of 3rd step
I. it is machined, welding steam circulation pump seal face, follows steam after the completion of welding as requested to repairing position
Ring pump seal face enters stove and carries out isothermal holding, and charging temperature is 180 DEG C, is incubated 6-8h, then furnace cooling to room temperature；
Detection after the reparation of 4th step
J. surface is repaired to steam circulation pump seal face and carries out dye penetrant inspection and ultrasonic examination;
K. hardness determination is carried out to the steam circulation pump seal face after reparation.
2. the laser melting coating restorative procedure after steam circulation pump seal surface wear according to claim 1, it is characterised in that
The dust, incrustation scale, corrosion in cleaning steam circulation pump seal face are cleared up.
3. the laser melting coating restorative procedure after steam circulation pump seal surface wear according to claim 1, it is characterised in that
The thickness for removing steam circulation pump seal surface damage position fatigue layer is 0.5-1mm.
4. the laser melting coating restorative procedure after steam circulation pump seal surface wear according to claim 1, it is characterised in that
The preheating temperature that the pre-heat treatment is carried out to steam circulation pump seal face is 150-200 DEG C.
5. the laser melting coating restorative procedure after steam circulation pump seal surface wear according to claim 4, it is characterised in that
The preheating temperature that the pre-heat treatment is carried out to steam circulation pump seal face is 180 DEG C.
6. the laser melting coating restorative procedure after steam circulation pump seal surface wear according to claim 1, it is characterised in that
The chemical composition and percentage by weight that the alloy powder in reparation steam circulation pump seal face is selected according to step d testing result contain
Measure and be：W (C) 1.0%, w (Si) 3.5%, w (B) 3.5%, w (Cr) 17.0%, w (N i) 58%, w (Fe) 17.0%,
Above-mentioned powder is mixed and forms alloy powder loaded in container.
7. the laser melting coating restorative procedure after steam circulation pump seal surface wear according to claim 1, it is characterised in that
The power of the regulation laser is 6kw, spot diameter 0.5-2mm, overlapping rate 33.3%, sweep speed 18mm/s.
8. the laser melting coating restorative procedure after steam circulation pump seal surface wear according to claim 1, it is characterised in that
Isothermal holding technique is carried out to steam circulation pump seal face enters stove furnace temperature temperature for 180 DEG C.
9. the laser melting coating restorative procedure after steam circulation pump seal surface wear according to claim 1 or 8, its feature exist
In the soaking time that isothermal holding technique is carried out to steam circulation pump seal face is 6 hours.
10. the laser melting coating restorative procedure after steam circulation pump seal surface wear according to claim 1 or 8, its feature
It is, the soaking time that isothermal holding technique is carried out to steam circulation pump seal face is 6 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710840561.6A CN107675168A (en) | 2017-09-18 | 2017-09-18 | Laser melting coating restorative procedure after steam circulation pump seal surface wear |
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| CN201710840561.6A CN107675168A (en) | 2017-09-18 | 2017-09-18 | Laser melting coating restorative procedure after steam circulation pump seal surface wear |
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ID=61136668
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| CN201710840561.6A Pending CN107675168A (en) | 2017-09-18 | 2017-09-18 | Laser melting coating restorative procedure after steam circulation pump seal surface wear |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280966A (en) * | 2019-04-10 | 2019-09-27 | 国家电网有限公司 | The restorative procedure in the working seal outer ring alloy face of the main inlet valve of hydroenergy storage station |
| CN110453218A (en) * | 2019-09-10 | 2019-11-15 | 西安煤矿机械有限公司 | A kind of restorative procedure of the coalcutter planet carrier based on laser melting coating welding |
| CN113042738A (en) * | 2021-03-10 | 2021-06-29 | 岭澳核电有限公司 | Pump cover plate additive repairing method and system for circulating water filtering system |
| CN113960162A (en) * | 2021-09-26 | 2022-01-21 | 南京钢铁股份有限公司 | Method for inspecting laser cladding repair layer on surface of roller |
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| CN102127763A (en) * | 2011-01-12 | 2011-07-20 | 唐山瑞兆激光技术机械修复有限公司 | Laser repair method for worn bearing cylinder of gas turbo-expander |
| CN102703896A (en) * | 2012-06-07 | 2012-10-03 | 安阳市飞龙冶金设备制造有限公司 | Production technology for smelting and cladding alloy reinforced wear-resisting sliding plate |
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2017
- 2017-09-18 CN CN201710840561.6A patent/CN107675168A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102127763A (en) * | 2011-01-12 | 2011-07-20 | 唐山瑞兆激光技术机械修复有限公司 | Laser repair method for worn bearing cylinder of gas turbo-expander |
| CN102703896A (en) * | 2012-06-07 | 2012-10-03 | 安阳市飞龙冶金设备制造有限公司 | Production technology for smelting and cladding alloy reinforced wear-resisting sliding plate |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280966A (en) * | 2019-04-10 | 2019-09-27 | 国家电网有限公司 | The restorative procedure in the working seal outer ring alloy face of the main inlet valve of hydroenergy storage station |
| CN110453218A (en) * | 2019-09-10 | 2019-11-15 | 西安煤矿机械有限公司 | A kind of restorative procedure of the coalcutter planet carrier based on laser melting coating welding |
| CN113042738A (en) * | 2021-03-10 | 2021-06-29 | 岭澳核电有限公司 | Pump cover plate additive repairing method and system for circulating water filtering system |
| CN113960162A (en) * | 2021-09-26 | 2022-01-21 | 南京钢铁股份有限公司 | Method for inspecting laser cladding repair layer on surface of roller |
| CN113960162B (en) * | 2021-09-26 | 2024-01-09 | 南京钢铁股份有限公司 | Inspection method for laser cladding repair layer on roller surface |
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Application publication date: 20180209 |