CN102330049A - Door rod strengthening technology for air pump recycling regulation door - Google Patents
Door rod strengthening technology for air pump recycling regulation door Download PDFInfo
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- CN102330049A CN102330049A CN201110261005A CN201110261005A CN102330049A CN 102330049 A CN102330049 A CN 102330049A CN 201110261005 A CN201110261005 A CN 201110261005A CN 201110261005 A CN201110261005 A CN 201110261005A CN 102330049 A CN102330049 A CN 102330049A
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Abstract
The invention discloses a door rod strengthening technology for an air pump recycling regulation door, which comprises the following steps of: 1. preliminary working: abrading the rod part of the door rod to remove the thickness of 0.18-0.20mm; 2. workpiece surface purification: purifying the surface until the surface is free from macroscopic oil stains; 3. surface pretreatment: carrying out abrasive blasting on the surface of the rod part of the door rod by 12# brown fused alumina sand, wherein the pressure of compressed air is 0.5-0.7kg/cm<2>, and the surface roughness after abrasive blasting reaches Sa 3 level; 4. metal ceramic coating spraying: spraying a metal ceramic coating on the surface of the rod part of the door rod by a supersonic speed flame spray gun, wherein the material is NiCr-C2C3 spraying powder, the flame center line of the spray gun and the axis of the workpiece are intersectant with the error within +/-5 degrees, the spraying distance is 220-250mm, parameters are controlled as follows: 15-18SCFM (standard cubic foot per minute) of O2, and 200-240SCFH (standard cubic foot per hour) of C3H6, and the temperature of the workpiece is controlled to below 200DEG C; and 5. mechanical processing of the coating. In the door rod strengthening technology, the supersonic speed spraying coating replaces a chromium coating so as to improve the abrasive resistance of the door rod, and the door rod strengthening technology is convenient to operate, is flexible and efficient, is environmentally-friendly and protects environment.
Description
Technical field
The present invention relates to a kind of door bar technology of carrying out surface strengthening, particularly relate to a kind of technology of carrying out the HVAF surface strengthening of the door bar to turbine power plant heat pump recycling adjustment doors heat pump recycling adjustment doors.
Background technology
Heat pump recycling adjusting every core, gate seat, a door bar are the important accessories of power plant steam turbine, and it directly influences the efficient and the economic benefit of generating.Owing to receive erosion serious, often 1 year less than with regard to owing to the trim erosion produces interior leakage, wastes energy.The working medium of the door core of existing heat pump recycling adjustment doors, gate seat, door bar is a water, 200 ℃ of medium temperatures, pressure 35MPa; The door core base material of import is 410SS; The base material of gate seat is 316SS, and door bar base material is 17-4PH/630, and its anti-impact erosion ability is improved through bakingout process in its surface.Through the trim of thermal treatment process (nitrogenize or quenching) setting treatment, because the hardened thinner thickness (quenching only less than 0.1mm) or the uneven thickness that quenches, in case the hardened layer partial failure will cause trim seriously to blow damage fast.
Summary of the invention
Technical problem to be solved by this invention provides a kind of door bar reinforcing process that can improve the heat pump recycling adjustment doors of door bar bar portion surface abrasion resistance.
In order to solve the problems of the technologies described above, the door bar reinforcing process of heat pump recycling adjustment doors provided by the invention, step is following:
One, preliminary working:
It is thick that door bar bar portion is ground off 0.18～0.20mm;
Two, workpiece surface purifies:
Surface cleaning, the visible oil stain of the no naked eyes in surface;
Three, surface preparation:
Adopt 12
#Corundum sand opposite house bar bar portion carries out sandblast, compressed air pressure 0.5～0.7kg/cm in the surface
2, the surfaceness after the sandblast reaches the Sa3 level;
Four, spray coating metal ceramic coating:
Adopt supersonic spray gun opposite house bar bar portion surface spray coating metal ceramic coating, material is NiCr-Cr
2C
3Dusty spray; The flame kernel line and the axis of workpiece of spray gun intersect vertically, error ± 5 °; Spray is apart from 220～250mm; Parameter control O
2: 15～18SCFM, C
3H
6: 200～240SCFH; Workpiece temperature is controlled at below 200 ℃ in the spraying process;
Five, coating machine processing:
Grinding, polishing are carried out in door bar bar portion surface to after the spraying, are finished product.
It is to carry out flame baking, 100 ℃～150 ℃ of workpiece surface temperatures with oxy-acetylene flame rifle opposite house bar bar portion surface that workpiece surface described in the above-mentioned steps (two) purifies.
Coating machine procedure of processing described in the above-mentioned steps (five) is following:
A, on lathe, use diamond wheel grinding, the surfaceness of grinding reaches Ra0.5 μ m～Ra0.8 μ m.
B, on lathe, reach Ra0.2 μ m～Ra0.4 μ m with boart boart band polishing machine glazed surface roughness.
Adopt the door bar reinforcing process of the heat pump recycling adjustment doors of technique scheme reinforcement, improved a door bar surface abrasion resistance.Because supersonic spray coating technology is the production technique of cleaning, can eliminate the severe contamination that electrodeposited chromium technology causes environment.This technological operation is easy, flexible and efficient, and material category is various.The supersonic spray coating coating not only can reach the mirror-finishing of chromium coating, and hardness and wear resisting property aspect also surpass chromium coating.Adopt the HVAF metal-ceramic coating to substitute the door bar that chromium coating is strengthened heat pump recycling adjustment doors.The present invention has not only increased the work-ing life of valve, for turbine power plant has practiced thrift the repair and maintenance cost, and substitutes the electrodeposited chromium technology of serious environment pollution with the hot spray production technique of cleaning, also has the great social effect of protection environment.The door bar of heat pump recycling adjustment doors adopts the HVAF metal-ceramic coating intensified process life-span to prolong 200%.
In sum, the present invention adopts the supersonic spray coating coating to substitute chromium coating, thereby has improved the wear resisting property of door bar, and technological operation is easy, flexible and efficient, environmental protection and energy saving.
Description of drawings
Fig. 1 is a door bar structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
The door core of turbine power plant heat pump recycling adjustment doors, gate seat, door bar are selected the manufacturing of 1Cr18Ni9Ti base material for use.The door bar substitutes chromium coating with the supersonic spray coating metal-ceramic coating and improves surface abrasion resistance.
Embodiment 1:
Referring to Fig. 1, every bar bar portion supersonic spray coating reinforcing process is regulated in heat pump recycling, and step is following:
One, preliminary working:
It is thick that the bar portion of door bar 1 is ground off 0.18mm;
Two, workpiece surface purifies:
Flame baking is carried out on bar portion surface with oxy-acetylene flame rifle opposite house bar 1,100 ℃ of workpiece surface temperatures:
Three, surface preparation:
12
#Sandblast is carried out, compressed air pressure 0.5kg/cm in the bar portion surface of corundum sand opposite house bar 1
2, the surfaceness after the sandblast reaches the Sa3 level;
Four, spray coating metal ceramic coating
Adopt the supersonic spray gun opposite house, 1 bar portion surface spray coating metal ceramic coating 2, material is NiCr-Cr
2C
3Dusty spray; The flame kernel line and the axis of workpiece of spray gun intersect vertically, error ± 5 °; Spray is apart from 220mm; Parameter control O
2: 15SCFM, C
3H
6: 200SCFH; Workpiece temperature is controlled at below 200 ℃ in the spraying process.Press above-mentioned parameter and adopt the coating of preparation fine and close, porosity is less than 1%; Bonding strength is high, greater than 7kg/mm
2, hardness HR15N88;
Five, coating machine processing
The coating machine procedure of processing is following:
A, on lathe, use diamond wheel grinding, the surfaceness of grinding reaches Ra0.5 μ m;
B, on lathe, reach Ra0.2 μ m with boart boart band polishing machine glazed surface roughness.
Embodiment 2:
Referring to Fig. 1, every bar bar portion supersonic spray coating reinforcing process is regulated in heat pump recycling, and step is following:
One, preliminary working:
It is thick that the bar portion of door bar 1 is ground off 0.19mm;
Two, workpiece surface purifies:
Flame baking is carried out on bar portion surface with oxy-acetylene flame rifle opposite house bar 1,120 ℃ of workpiece surface temperatures;
Three, surface preparation:
12
#Sandblast is carried out, compressed air pressure 0.6kg/cm in the bar portion surface of corundum sand opposite house bar 1
2, the surfaceness after the sandblast reaches the Sa3 level;
Four, spray coating metal ceramic coating
Adopt the bar portion surface spray coating metal ceramic coating 2 of supersonic spray gun opposite house bar 1, material is NiCr-Cr
2C
3Dusty spray; The flame kernel line and the axis of workpiece of spray gun intersect vertically, error ± 5 °; Spray is apart from 235mm; Parameter control O
2: 16SCFM, C
3H
6: 220SCFH; Workpiece temperature is controlled at below 200 ℃ in the spraying process.Press above-mentioned parameter and adopt the coating of preparation fine and close, porosity is less than 1%; Bonding strength is high, greater than 7kg/mm
2, hardness HR15N90;
Five, coating machine processing
The coating machine procedure of processing is following:
A, on lathe, use diamond wheel grinding, the surfaceness of grinding reaches Ra0.6 μ m;
B, on lathe, reach Ra0.3 μ m with boart boart band polishing machine glazed surface roughness.
Embodiment 3:
Referring to Fig. 1, every bar bar portion supersonic spray coating reinforcing process is regulated in heat pump recycling, and step is following:
One, preliminary working:
It is thick that the bar portion of door bar 1 is ground off 0.20mm;
Two, workpiece surface purifies:
Flame baking is carried out on bar portion surface with oxy-acetylene flame rifle opposite house bar 1,150 ℃ of workpiece surface temperatures;
Three, surface preparation:
12
#Sandblast is carried out, compressed air pressure 0.7kg/cm in the bar portion surface of corundum sand opposite house bar 1
2, the surfaceness after the sandblast reaches the Sa3 level;
Four, spray coating metal ceramic coating
Adopt the bar portion surface spray coating metal ceramic coating 2 of supersonic spray gun opposite house bar 1, material is NiCr-Cr
2C
3Dusty spray; The flame kernel line and the axis of workpiece of spray gun intersect vertically, error ± 5 °; Spray is apart from 250mm; Parameter control O
2: 18SCFM, C
3H
6: 240SCFH; Workpiece temperature is controlled at below 200 ℃ in the spraying process.Press above-mentioned parameter and adopt the coating of preparation fine and close, porosity is less than 1%; Bonding strength is high, greater than 7kg/mm
2, hardness HR15N91;
Five, coating machine processing
The coating machine procedure of processing is following:
A, on lathe, use diamond wheel grinding, the surfaceness of grinding reaches Ra0.8 μ m.
B, on lathe, reach Ra0.4 μ m with boart boart band polishing machine glazed surface roughness.
It is chromed 3 times an of bar that the bar portion of door bar 1 adopts the friction durability of HVAF metal-ceramic coating intensified process.
The present invention is to the surface intensified technique of the bar portion HVAF metal-ceramic coating of the door bar 1 of heat pump recycling adjustment doors, and is following in order to replace the chromed effect of door bar:
One, adopts the supersonic spray coating technology of cleaning to substitute electrodeposited chromium technology, eliminated severe contamination water surrounding.
Two, former factory makes the bar portion chrome-faced of door bar 1, is chromed 3 times and adopt the wear resisting property of HVAF metal-ceramic coating.Can increase substantially the work-ing life of heat pump recycling adjustment doors, reduce, practice thrift the repair and maintenance cost because of leaking the financial loss that waste and disorderly closedown bring in the heat pump recycling adjustment doors.
Three, this technology can be applicable to old reparation, also can be applicable to the manufacturing of new part.Domestic many turbine power plant is for introducing unit, and the accessory import cycle is long, expensive.And result of use is better than new part after old reparation, and is significant for turbine power plant.Enterprise itself can be described as the situation of doulbe-sides' victory also through the maintenance or the high profit of manufacturing earning of production domesticization.
Four, electrodeposited chromium layers is a kind of wearing layer that is widely used in component of machine, and adopting the supersonic spray coating replacement chromium coating of cleaning is the inexorable trend of social development.The Application Areas that the good minute surface supersonic spray coating coating of wear resisting property substitutes chromium coating is very wide.
The present invention adopts the HVAF cermet, regulates the reparation of every bar and makes successful Application in heat pump recycling, replaces original chrome-plated process.The present invention is a kind of new trial in the application of turbine power plant heat pump recycling adjustment doors, is a kind of innovation to former ME.Enforcement of the present invention is not merely turbine power plant and has practiced thrift the repair and maintenance cost, can prolong the work-ing life of heat pump recycling adjustment doors.And, adopt the supersonic speed technology of cleaning to replace electrodeposited chromium technology, eliminated the severe contamination of electrodeposited chromium technology to water surrounding, help environment protection.
Claims (3)
1. the door bar reinforcing process of a pump recycling adjustment doors, it is characterized in that: step is following:
One, preliminary working:
It is thick that door bar bar portion is ground off 0.18～0.20mm;
Two, workpiece surface purifies:
Surface cleaning, the visible oil stain of the no naked eyes in surface;
Three, surface preparation:
Adopt 12
#Corundum sand opposite house bar bar portion carries out sandblast, compressed air pressure 0.5～0.7kg/cm in the surface
2, the surfaceness after the sandblast reaches the Sa3 level;
Four, spray coating metal ceramic coating:
Adopt supersonic spray gun opposite house bar bar portion surface spray coating metal ceramic coating, material is NiCr-Cr
2C
3Dusty spray; The flame kernel line and the axis of workpiece of spray gun intersect vertically, error ± 5 °; Spray is apart from 220～250mm; Parameter control O
2: 15～18SCFM, C
3H
6: 200～240SCFH; Workpiece temperature is controlled at below 200 ℃ in the spraying process;
Five, coating machine processing:
Grinding, polishing are carried out in door bar bar portion surface to after the spraying, are finished product.
2. the door bar reinforcing process of pump recycling adjustment doors according to claim 1; It is characterized in that: it is to carry out flame baking, 100 ℃～150 ℃ of workpiece surface temperatures with oxy-acetylene flame rifle opposite house bar bar portion surface that the workpiece surface described in the above-mentioned steps (two) purifies.
3. the door bar reinforcing process of pump recycling adjustment doors according to claim 1 and 2, it is characterized in that: the coating machine procedure of processing described in the above-mentioned steps (five) is following:
A, on lathe, use diamond wheel grinding, the surfaceness of grinding reaches Ra0.5 μ m～Ra0.8 μ m.
B, on lathe, reach Ra0.2 μ m～Ra0.4 μ m with boart boart band polishing machine glazed surface roughness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110261005A CN102330049A (en) | 2011-09-05 | 2011-09-05 | Door rod strengthening technology for air pump recycling regulation door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110261005A CN102330049A (en) | 2011-09-05 | 2011-09-05 | Door rod strengthening technology for air pump recycling regulation door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102330049A true CN102330049A (en) | 2012-01-25 |
Family
ID=45482009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110261005A Pending CN102330049A (en) | 2011-09-05 | 2011-09-05 | Door rod strengthening technology for air pump recycling regulation door |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787288A (en) * | 2012-08-21 | 2012-11-21 | 黄红霞 | Hot spraying process of metal ceramic coating on surface of valve rod |
| CN103147033A (en) * | 2013-04-02 | 2013-06-12 | 南阳淅减汽车减振器有限公司 | Vehicle shock absorber piston rod spraying technology |
| CN103447968A (en) * | 2013-09-22 | 2013-12-18 | 叶红 | Shot peening process |
| CN105290719A (en) * | 2014-07-20 | 2016-02-03 | 安庆市亿豪工贸发展有限公司 | Method for machining hydraulic piston rod for forklift |
| CN105880125A (en) * | 2014-12-18 | 2016-08-24 | 北京中科信电子装备有限公司 | Method for dynamic sealing of target platform |
| CN106435457A (en) * | 2016-10-08 | 2017-02-22 | 无锡鸿海龙船机有限公司 | Friction increasing method for anti-scuffing hydraulic coupling inner sleeve |
| CN107881456A (en) * | 2017-11-14 | 2018-04-06 | 郑媛媛 | A kind of valve rod preparation technology |
| CN108203800A (en) * | 2018-01-04 | 2018-06-26 | 广州市天河区金棠表面工程技术有限公司 | A kind of surface treatment method of turbine high-pressure main inlet throttle-stop valve |
| CN109136814A (en) * | 2018-08-20 | 2019-01-04 | 陕西鑫威泰生物科技有限公司 | A kind of preparation method customizing skull board for pillow polyether-ether-ketone composite coating |
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| JPH10180191A (en) * | 1996-12-21 | 1998-07-07 | Mishima Kosan Co Ltd | Sieve member for iron-making material and spray coating method for respective bar-shaped material constituting the same |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787288A (en) * | 2012-08-21 | 2012-11-21 | 黄红霞 | Hot spraying process of metal ceramic coating on surface of valve rod |
| CN103147033A (en) * | 2013-04-02 | 2013-06-12 | 南阳淅减汽车减振器有限公司 | Vehicle shock absorber piston rod spraying technology |
| CN103147033B (en) * | 2013-04-02 | 2015-06-03 | 南阳淅减汽车减振器有限公司 | Vehicle shock absorber piston rod spraying technology |
| CN103447968A (en) * | 2013-09-22 | 2013-12-18 | 叶红 | Shot peening process |
| CN103447968B (en) * | 2013-09-22 | 2015-10-28 | 叶红 | A kind of shot-peening processing technology |
| CN105290719A (en) * | 2014-07-20 | 2016-02-03 | 安庆市亿豪工贸发展有限公司 | Method for machining hydraulic piston rod for forklift |
| CN105880125A (en) * | 2014-12-18 | 2016-08-24 | 北京中科信电子装备有限公司 | Method for dynamic sealing of target platform |
| CN106435457A (en) * | 2016-10-08 | 2017-02-22 | 无锡鸿海龙船机有限公司 | Friction increasing method for anti-scuffing hydraulic coupling inner sleeve |
| CN107881456A (en) * | 2017-11-14 | 2018-04-06 | 郑媛媛 | A kind of valve rod preparation technology |
| CN108203800A (en) * | 2018-01-04 | 2018-06-26 | 广州市天河区金棠表面工程技术有限公司 | A kind of surface treatment method of turbine high-pressure main inlet throttle-stop valve |
| CN109136814A (en) * | 2018-08-20 | 2019-01-04 | 陕西鑫威泰生物科技有限公司 | A kind of preparation method customizing skull board for pillow polyether-ether-ketone composite coating |
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Application publication date: 20120125 |