CN103882441A - Repairing method of 2Cr12NiMo1W1V blade surface Al coating - Google Patents
Repairing method of 2Cr12NiMo1W1V blade surface Al coating Download PDFInfo
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- CN103882441A CN103882441A CN201410114139.9A CN201410114139A CN103882441A CN 103882441 A CN103882441 A CN 103882441A CN 201410114139 A CN201410114139 A CN 201410114139A CN 103882441 A CN103882441 A CN 103882441A
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- blade
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- blade surface
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention provides a preparing method of 2Cr12NiMo1W1V blade surface Al coating, comprises the following steps: cleaning and drying the to-be-repaired blade, soaking the blade in a sodium hydroxide aqueous solution at temperature of 70-90 DEG C and concentration of 80-100g/l, reacting for 50-80min, taking out the blade, washing residual bath solution on the blade by using tap water, performing sand blasting on the blade surface by using white emery, checking defect of blade, and preparing new Al coating by using a manual coating mode. The method provided by the invention overcomes the problems that the size of the blade manufactured by using a machining method is out of tolerance and the acid pickling can corrode the substrate; the size of the blade is precisely guaranteed to meet the design standard, the reuse rate of the reworking blade is improved; the cleanliness of the blade surface is guaranteed, and the combining strength of the coating and the blade is improved; the blade repaired by the method is good in use effect, the corrosion resistance, the coating roughness and the combining strength meet the design requirements, the production cost is low, the operation is convenient, and the application prospect is wide.
Description
Technical field
The invention belongs to field of surface treatment, particularly relate to a kind of restorative procedure of functional coating, relate in particular to a kind of restorative procedure of 2Cr12NiMo1W1V blade surface Al coating.
Background technology
Pneumatic plant needs internal part to overhaul in use for some time, particularly coal press machine, and owing to containing the compound of sulphur and small solid particulate in fluid medium, therefore the corrosion phenomenon of coal press machine Leaf is comparatively serious.In maintenance process, need place under repair after reaching standard and can again come into operation for the blade not meeting design requirement.That therefore optimizes the Rework Technics of blade coatings and improve blade reprocesses qualification rate to improving blade work-ing life, and important in inhibiting reduces production costs.
In order to improve work-ing life and the impact of minimizing on blade flow efficiency that material is the compressor blade of 2Cr12NiMo1W1V, need prepare on compressor blade surface the aluminum coating that one deck is smooth.The Al coating of 2Cr12NiMo1W1V compressor blade there will be imperfect phenomenon in use for some time, and fluid medium can corrode and erosion base material causes scrapping of blade.Therefore after each maintenance, need the blade to not meeting design requirement to carry out the reparation of original coating removal and 2Cr12NiMo1W1V blade surface Al coating.Existing coating removal mode has: pickling chemical reaction method and mechanical workout are removed method, but these two kinds of methods are in decoating, can occur excessive erosion or cause the overproof phenomenon of blade dimensions base material respectively.
Summary of the invention
The object of the invention is the restorative procedure for a kind of 2Cr12NiMo1W1V blade surface Al coating is provided.
The technical solution adopted in the present invention is as follows:
A restorative procedure for 2Cr12NiMo1W1V blade surface Al coating, first adopts chemical process to remove original Al coating, after passed examination, then in the new Al coating of the manual preparation of blade surface; Comprise the following steps:
(1) 2Cr12NiMo1W1V blade to be repaired is cleaned and dried;
(2) 2Cr12NiMo1W1V blade after treatment step (1) being immersed in to temperature is in 70-90 ℃, the concentration aqueous sodium hydroxide solution that is 80-100g/l, make the Al coating of aqueous sodium hydroxide solution and blade surface carry out chemical reaction, the reaction times is 50-80min;
(3) take out the 2Cr12NiMo1W1V blade after removal Al coating in step (2), rinse tank liquor residual on this blade with tap water, then use white fused alumina sand to carry out sandblasting to blade surface, until blade surface presents metalluster, to there is no the visible coating of naked eyes residual;
(4) blade is carried out to detection of defects;
(5) adopt the mode of hand spray to prepare new Al coating at 2Cr12NiMo1W1V blade surface, the 2Cr12NiMo1W1V blade that then surface is manufactured with to Al coating is placed in heat treatment furnace and heats and be incubated.
In described step (3), the specification of white fused alumina sand is: 100#-200#.
In described step (4), the test mode that detection of defects adopts visual inspection to combine with magnetic-particle inspection.
In described step (5), the Heating temperature of heat treatment furnace is 300-400 ℃, and soaking time is 10-60min.
Compared with prior art, advantage of the present invention is:
(1) the present invention adopts chemical strip method removal 2Cr12NiMo1W1V blade surface Al coating can prevent base material to corrode.
(2) the present invention adopts chemical strip method to remove 2Cr12NiMo1W1V blade surface Al coating can to overcome and adopt simple mechanical working method to remove coating to cause blade dimensions overproof.
(3) the present invention adopts VT and the inspection of MT combination to reprocess blade defect, can more accurately guarantee the size conforms standard of blade, improves the repeat usage of reprocessing blade.
(4) the present invention, adopting chemical strip method to remove after 2Cr12NiMo1W1V blade surface Al coating, adopts 120# white fused alumina sand to carry out to blade surface the bonding strength that sandblasting can guarantee the degree of cleaning of blade surface and improve new system coating and blade.
(5) the blade result of use that uses the inventive method to repair is good, and the performances such as solidity to corrosion, coating roughness and bonding strength all can meet design requirement, and low production cost, easy to operate, have a extensive future.
Embodiment
The present invention is a kind of restorative procedure of 2Cr12NiMo1W1V blade surface Al coating, first adopts chemical process to remove original Al coating, after passed examination, then in the new Al coating of the manual preparation of blade surface; First adopt chemical process to remove original Al coating, adopt again two kinds of modes of VT and MT in conjunction with blade is carried out to detection of defects, after passed examination, determine maintenance program, finally adopt the mode of hand spray to prepare new Al coating, realize the reparation of 2Cr12NiMo1W1V blade surface Al coating and guarantee the size conforms standard of blade.Specifically comprise the following steps:
(1) 2Cr12NiMo1W1V blade to be repaired is cleaned and dried;
(2) adopt chemical process to remove original Al coating: 2Cr12NiMo1W1V blade after treatment step (1) is immersed in coating removal tank liquor, in this embodiment, coating removal tank liquor is that temperature is the aqueous sodium hydroxide solution that 70-90 ℃, concentration are 80-100g/l.In this step, the Al coating of aqueous sodium hydroxide solution and blade surface is carried out chemical reaction, and the reaction times is 50-80min.
In this step, concrete reactional equation is: Al+NaOH+H
2o → NaAlO
2+ H
2.Wherein: the sodium hydroxide NaOH aqueous solution can not react with basic material of blade 2Cr12NiMo1W1V, and therefore this chemical reaction can not corrode basic material of blade; The sodium metaaluminate NaAlO simultaneously generating
2can be water-soluble, be easy to reclaim hydrogen H
2nontoxic, can enter safely in atmosphere.
(3) take out the 2Cr12NiMo1W1V blade after removal Al coating in step (2), rinse tank liquor residual on this blade with tap water, then use white fused alumina sand to carry out sandblasting to blade surface, until blade surface presents metalluster, to there is no the visible coating of naked eyes residual.In this embodiment, the specification of white fused alumina sand is: 100#-200#.
(4) blade is carried out to detection of defects.In this embodiment, the test mode that detection of defects adopts visual inspection VT to combine with two kinds of modes of magnetic-particle inspection MT.
(5) adopt the mode of hand spray to prepare new Al coating at 2Cr12NiMo1W1V blade surface, the 2Cr12NiMo1W1V blade that then surface is manufactured with to Al coating is placed in heat treatment furnace and heats and be incubated.In this embodiment, the Heating temperature of heat treatment furnace is 300-400 ℃, and soaking time is 10-60min.
Be described in further detail below in conjunction with 3 embodiment and 1,2 couples of the present invention of subordinate list; described content is only the basic explanation of the present invention under conceiving; but this explanation is not limited to example below; any equivalent transformation of doing according to technical scheme of the present invention, all belongs to protection scope of the present invention.
Embodiment 1
(1) 2Cr12NiMo1W1V blade to be repaired is cleaned and dried;
(2) adopt chemical process to remove original coating: the coating removal tank liquor to 80 ℃ that heating concentration is 90g/l, is placed in coating removal tank liquor by the pending 2Cr12NiMo1W1V blade that is coated with Al coating and leaves standstill 60min;
(3) take out blade after treatment, rinse blade residual tank liquor with tap water, and use 180# white fused alumina sand to carry out sandblasting to blade surface, until blade surface presents metalluster, to there is no the visible coating of naked eyes residual.
(4) mode that adopts visual inspection to combine with magnetic-particle inspection is carried out detection of defects to blade.
(5) new coating preparation: adopt hand spray mode to prepare new coating at blade surface, the blade of preparation coating is placed in to 360 ℃ of heat treatment furnaces and is incubated 60min.
For the difference of 2Cr12NiMo1W1V blade surface reparation Al coating performance and new system blade coatings performance in comparative example 1, blade reparation and new system blade coatings are carried out to roughness, adhesion strength and solidity to corrosion test, refer to table 1.
In order whether to carry out sandblasting in test implementation example 1 after coating removal, 2Cr12NiMo1W1V blade surface is repaired the impact of Al coating performance, blade reparation is carried out to roughness, adhesion strength test, refer to table 2.
Table 1. embodiment 1 prepares blade reparation and the contrast of blade new system coating performance
In table 2. embodiment 1, adopt sandblasting reparation and do not adopt sandblasting reparation performance comparison.
In embodiment 1,2Cr12NiMo1W1V blade surface reparation Al coating performance is close with blade new system coating performance as can be seen from Table 1, meets design requirement.
In embodiment 1, after coating removal, adopting as can be seen from Table 2 the processing of 180# white fused alumina sand can significantly improve 2Cr12NiMo1W1V blade surface repairs the bonding strength of Al coating and reduces coatingsurface roughness.
Embodiment 2
(1) 2Cr12NiMo1W1V blade to be repaired is cleaned and dried;
(2) adopt chemical process to remove original coating: the coating removal tank liquor to 70 ℃ that heating concentration is 80g/l, is placed in coating removal tank liquor by the pending 2Cr12NiMo1W1V blade that is coated with Al coating and leaves standstill 80min;
(3) take out blade after treatment, rinse blade residual tank liquor with tap water, and use 150# white fused alumina sand to carry out sandblasting to blade surface, until blade surface presents metalluster, to there is no the visible coating of naked eyes residual.
(4) mode that adopts visual inspection to combine with magnetic-particle inspection is carried out detection of defects to blade.
(5) new coating preparation: adopt hand spray mode to prepare new coating at blade surface, the blade of preparation coating is placed in to 400 ℃ of heat treatment furnaces and is incubated 50min.
Embodiment 3
(1) 2Cr12NiMo1W1V blade to be repaired is cleaned and dried;
(2) adopt chemical process to remove original coating: the coating removal tank liquor to 90 ℃ that heating concentration is 100g/l, is placed in coating removal tank liquor by the pending 2Cr12NiMo1W1V blade that is coated with Al coating and leaves standstill 50min;
(3) take out blade after treatment, rinse blade residual tank liquor with tap water, and use 120# white fused alumina sand to carry out sandblasting to blade surface, until blade surface presents metalluster, to there is no the visible coating of naked eyes residual.
(4) mode that adopts visual inspection to combine with magnetic-particle inspection is carried out detection of defects to blade.
(5) new coating preparation: adopt hand spray mode to prepare new coating at blade surface, the blade of preparation coating is placed in to 300 ℃ of heat treatment furnaces and is incubated 60min.
Claims (4)
1. a restorative procedure for 2Cr12NiMo1W1V blade surface Al coating, first adopts chemical process to remove original Al coating, after passed examination, then in the new Al coating of the manual preparation of blade surface; It is characterized in that, comprise the following steps:
(1) 2Cr12NiMo1W1V blade to be repaired is cleaned and dried;
(2) 2Cr12NiMo1W1V blade after treatment step (1) being immersed in to temperature is in 70-90 ℃, the concentration aqueous sodium hydroxide solution that is 80-100g/l, make the Al coating of aqueous sodium hydroxide solution and blade surface carry out chemical reaction, the reaction times is 50-80min;
(3) take out the 2Cr12NiMo1W1V blade after removal Al coating in step (2), rinse tank liquor residual on this blade with tap water, then use white fused alumina sand to carry out sandblasting to blade surface, until blade surface presents metalluster, to there is no the visible coating of naked eyes residual;
(4) blade is carried out to detection of defects;
(5) adopt the mode of hand spray to prepare new Al coating at 2Cr12NiMo1W1V blade surface, the 2Cr12NiMo1W1V blade that then surface is manufactured with to Al coating is placed in heat treatment furnace and heats and be incubated.
2. the restorative procedure of 2Cr12NiMo1W1V blade surface Al coating according to claim 1, is characterized in that, in described step (3), the specification of white fused alumina sand is: 100#-200#.
3. the restorative procedure of 2Cr12NiMo1W1V blade surface Al coating according to claim 1, is characterized in that, in described step (4), and the test mode that detection of defects adopts visual inspection to combine with magnetic-particle inspection.
4. the restorative procedure of 2Cr12NiMo1W1V blade surface Al coating according to claim 1, is characterized in that, in described step (5), the Heating temperature of heat treatment furnace is 300-400 ℃, and soaking time is 10-60min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410114139.9A CN103882441A (en) | 2014-03-25 | 2014-03-25 | Repairing method of 2Cr12NiMo1W1V blade surface Al coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410114139.9A CN103882441A (en) | 2014-03-25 | 2014-03-25 | Repairing method of 2Cr12NiMo1W1V blade surface Al coating |
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| CN103882441A true CN103882441A (en) | 2014-06-25 |
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| CN201410114139.9A Pending CN103882441A (en) | 2014-03-25 | 2014-03-25 | Repairing method of 2Cr12NiMo1W1V blade surface Al coating |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107988610A (en) * | 2017-11-27 | 2018-05-04 | 成都工具研究所有限公司 | Carbide chip TiAlN, TiN coating strip method |
| CN108018421A (en) * | 2017-11-30 | 2018-05-11 | 江苏隆达超合金航材有限公司 | Remove the cated treatment process containing ceramic core or surface in waste leaf piece |
| CN111379642A (en) * | 2018-12-29 | 2020-07-07 | 中内凯思汽车新动力系统有限公司 | Repairing process of nano coating on surface of piston and repaired piston |
| CN116043066A (en) * | 2022-12-21 | 2023-05-02 | 东方电气集团东方汽轮机有限公司 | Low-diffusivity activation auxiliary agent, application thereof, repairing agent and preparation method and alloy repairing method thereof |
| CN116043066B (en) * | 2022-12-21 | 2024-05-03 | 东方电气集团东方汽轮机有限公司 | Low-diffusivity activation auxiliary agent, application thereof, repairing agent and preparation method and alloy repairing method thereof |
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| JPS59211576A (en) * | 1983-05-16 | 1984-11-30 | Sumitomo Metal Ind Ltd | Method for removing sprayed al or zn film |
| EP0713957A1 (en) * | 1994-11-25 | 1996-05-29 | FINMECCANICA S.p.A. AZIENDA ANSALDO | Method of repairing the coating of turbine blades |
| CN101041252A (en) * | 2007-03-30 | 2007-09-26 | 浙江大学 | Separating and recovering method of the priming, aluminum coating layer and the protecting film on the plastic basal body |
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| CN102965623A (en) * | 2012-11-09 | 2013-03-13 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for repairing NiCrAlYSi coating on DZ125 blade surface |
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2014
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Patent Citations (6)
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| JPS59211576A (en) * | 1983-05-16 | 1984-11-30 | Sumitomo Metal Ind Ltd | Method for removing sprayed al or zn film |
| EP0713957A1 (en) * | 1994-11-25 | 1996-05-29 | FINMECCANICA S.p.A. AZIENDA ANSALDO | Method of repairing the coating of turbine blades |
| CN101041252A (en) * | 2007-03-30 | 2007-09-26 | 浙江大学 | Separating and recovering method of the priming, aluminum coating layer and the protecting film on the plastic basal body |
| CN101413123A (en) * | 2008-11-25 | 2009-04-22 | 广东东南薄膜科技股份有限公司 | Locating dealuminzation method for surface of aluminum plating film |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107988610A (en) * | 2017-11-27 | 2018-05-04 | 成都工具研究所有限公司 | Carbide chip TiAlN, TiN coating strip method |
| CN108018421A (en) * | 2017-11-30 | 2018-05-11 | 江苏隆达超合金航材有限公司 | Remove the cated treatment process containing ceramic core or surface in waste leaf piece |
| CN111379642A (en) * | 2018-12-29 | 2020-07-07 | 中内凯思汽车新动力系统有限公司 | Repairing process of nano coating on surface of piston and repaired piston |
| CN111379642B (en) * | 2018-12-29 | 2021-09-21 | 中内凯思汽车新动力系统有限公司 | Repairing process of nano coating on surface of piston and repaired piston |
| CN116043066A (en) * | 2022-12-21 | 2023-05-02 | 东方电气集团东方汽轮机有限公司 | Low-diffusivity activation auxiliary agent, application thereof, repairing agent and preparation method and alloy repairing method thereof |
| CN116043066B (en) * | 2022-12-21 | 2024-05-03 | 东方电气集团东方汽轮机有限公司 | Low-diffusivity activation auxiliary agent, application thereof, repairing agent and preparation method and alloy repairing method thereof |
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Application publication date: 20140625 |