CN102787288A - Hot spraying process of metal ceramic coating on surface of valve rod - Google Patents
Hot spraying process of metal ceramic coating on surface of valve rod Download PDFInfo
- Publication number
- CN102787288A CN102787288A CN2012103027276A CN201210302727A CN102787288A CN 102787288 A CN102787288 A CN 102787288A CN 2012103027276 A CN2012103027276 A CN 2012103027276A CN 201210302727 A CN201210302727 A CN 201210302727A CN 102787288 A CN102787288 A CN 102787288A
- Authority
- CN
- China
- Prior art keywords
- valve rod
- ceramic coating
- spraying
- hot
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005507 spraying Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005524 ceramic coating Methods 0.000 title claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 10
- 239000002184 metal Substances 0.000 title claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 24
- 238000000576 coating method Methods 0.000 claims abstract description 24
- 238000005260 corrosion Methods 0.000 claims abstract description 15
- 230000007797 corrosion Effects 0.000 claims abstract description 13
- 238000005498 polishing Methods 0.000 claims abstract description 8
- 238000007781 pre-processing Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 9
- 238000000280 densification Methods 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 5
- 229910001120 nichrome Inorganic materials 0.000 claims description 5
- 238000009997 thermal pre-treatment Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000011651 chromium Substances 0.000 description 8
- 238000005121 nitriding Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000000945 filler Substances 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000003245 working effect Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910001347 Stellite Inorganic materials 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000007750 plasma spraying Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000005542 laser surface treatment Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- YNBADRVTZLEFNH-UHFFFAOYSA-N methyl nicotinate Chemical compound COC(=O)C1=CC=CN=C1 YNBADRVTZLEFNH-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
Landscapes
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a hot spraying process of a metal ceramic coating on surface of a valve rod, and relates to the field of manufacture of a valve. The hot spraying process comprises the technical procedures of mechanical pre-processing, surface purifying, surface coarsening, pre-heating treatment, hot spraying, accurately grinding and polishing and the like; a vacuum electric furnace is adopted in the heat treatment; the valve rod is pre-heated to 80-150 DEG C; hypersonic flame hot-spraying is adopted; and a valve rod base body is cooled by a forcible air cooling device when being subjected to hot spraying, and a smooth and compact high-performance metal ceramic coating with wear resistance, corrosion resistance, high binding strength and low porosity is formed on the surface of the valve rod after being polished. The process is high in coating efficiency, free from pollution, high in binding strength of the coating and low in porosity; wear-resisting and corrosion-resisting performances and high-temperature and heat vibration resistance of the surface of the valve rod are greatly improved without changing the precision of the overall size of the valve rod; the usability of the valve rod is greatly improved; the service life of the valve rod can be improved by 2-5 times; and the hot spraying process can be applied to a steam valve of a steam turbine unit, a special valve for a power station and other valves.
Description
Technical field:
The present invention relates to valve and make the field, particularly a kind of stem surface metal-ceramic coating hot-spraying techniques, this valve rod can be used for the steam valve of turbine unit, power station special valve and other valves.
Background technology:
Valve rod is the vitals in the valve; Be used for transmission; On connect topworks or handle, below directly drive spool and move or rotate, to realize valve switch valve rod not still movement parts, stressed member in the valve opening and closing process; And be sealing member, can receive the damage that various corrosion and wearing and tearing bring at work.Like the corrosion that in high-temperature steam, receives, the hot vibration that under hot environment, produces is decreased, the impact of medium and corrosion, and the frictional wear of filler, and filler also can produce galvanic corrosion to valve rod.Not only corrosive medium can make the valve rod corrosion damage, and general water vapour and water also can make valve rod and filler contact position produce spot, also because filler is moist; Or there was dampness in the air, produces galvanic corrosion, in addition; Lack oxygen between filler and the valve rod,, exist the concentration difference of oxygen on every side with relatively; This has just constituted oxygen concentration cell, becomes the form of another galvanic corrosion.Therefore when the selector valve bar material, must guarantee that it has enough intensity, good impelling strength, resistance to marring, erosion resistance under the temperature of stipulating.And to carry out surface treatment to valve rod, like chromium plating, nickel plating, nitriding, boronising, zincizing etc.
In the application of reality,, also all it has been done certain processing for the use properties and the work-ing life of improving valve rod.Like the valve rod that uses on turbine main steam valve and the steam regulating valve door; Material is martensite high temperature steel (like 1Cr11MoV etc.); Carry out the nitriding processing at sealing position built-up welding one deck stellite of valve rod and to stem surface; The built-up welding stellite can prevent erosion and the wearing and tearing of steam to trim, and stem surface is carried out nitriding and handled the wear resisting property and the antioxidant property that can improve valve rod to a certain extent.Stuck even the fracture of valve rod in use often takes place in this valve rod, though mainly be because the nitriding processing is carried out on the surface, under the effect of water vapour, corrosion and oxidation can take place at high temperature (538 ℃ or 566 ℃), thereby take place stuck even fracture.A kind of steam turbine valve that provides like patent No. ZL200310104129.9 is with valve rod and heat treating method thereof; Material to valve rod improves, and selects for use the NiFeCrMoTiB alloy to replace 12%Cr martensite high temperature steel, also is to adopt nitriding to handle to carry out surface strengthening on the surface of valve rod; It is stuck that it has solved valve rod to a certain extent; The problem of fracture, but the nitriding processing that adopt on its surface does not still possess very high wear resisting property and high-temperature corrosion resistance performance.And for example stem surface is carried out intensified process such as surfacing, plasma spraying, laser melting coating, electrodeposited chromium, electronickelling, wherein surfacing produces distortion to integral body easily, and thermal stresses is easy to generate crackle greatly; The flame temperature height of plasma spraying but speed is low easily powder is caused the oxidation affects coating performance, and coating's adhesion is lower; The laser melting coating cost is high; The energy height is difficult to avoid cracking because of thermal stresses, and electrodeposited chromium and electronickelling can be played certain protection to stem surface, but its intensity is low; Poor performance is decreased in the heat resistanceheat resistant vibration; And the common coating valve rod behind the generation cut is easy to peel off because of electrochemistry produces integral body, and the most more complicated of whole machining process technology, and also there is very big pollution in electroless plating.
Summary of the invention:
The present invention seeks in order to overcome the deficiency of prior art, a kind of stem surface metal-ceramic coating hot-spraying techniques is provided, can prepare the high-performance coating that satisfies its request for utilization in stem surface.
The present invention solves the scheme that its technical problem adopts: a kind of stem surface metal-ceramic coating hot-spraying techniques; Comprise process procedures such as mechanical preprocessing, surface cleaning, surface coarsening, thermal pretreatment, thermospray, fine-grinding and polishing; Through Solvent degreasing, washing, oven dry stem surface is carried out purifying treatment; Adopt sandblasting that alligatoring is carried out to Ra2.5～13 μ m in its surface, thermal pretreatment adopts vacuum electric furnace, and valve rod is preheated to 80～150 ℃; During thermospray valve rod matrix adopting air blast cooling device is cooled off, the polishing back forms the high-performance metal ceramic coating of smooth densification, wear resistant corrosion resistant in stem surface.
The mechanical preprocessing of before the described spraying its surface being carried out is under the position of required spraying, to switch to specified size, confirms the specified size of incision according to the coat-thickness of required spraying.
The supersonic flame thermospray is adopted in described thermospray, and the temperature of flame is 2800～3100 ℃, and the speed of powder particle is 700～1200m/s, and spray distance is 130～1000mm, and dusty spray adopts Cr
3C
2-NiCr metal ceramic powder.
Described coating is carried out polished finish, make smooth surface, densification, the valve rod overall dimensions is consistent, and its dimensional precision satisfies assembling and user demand.
Described Bond Strength of Coating is higher than 70MPa, and porosity is lower than 1%.
Beneficial effect of the present invention is:
(1) spray efficiency is high, and its cost is lower than Laser Surface Treatment, and has avoided the situation of cladding laser surfaces coating cracking, and the spraying process environmental protection can not produce pollution as electroplating.
(2) process of whole machining process can not produce distortion to valve rod is whole, only improve its surperficial performance, through preprocessing, and the processing of the polishing after the spraying, valve rod whole be consistent originally, can not produce any influence to the use of workpiece.
(3) adopt like Cr
3C
2The metal ceramic powder of-NiCr etc. can form metal-ceramic coating in stem surface, and it has high firmness, wear resistant corrosion resistant, and be applicable to hot environment to have high-temperature oxidation resistant, characteristics such as high hot hardness.
(4) spraying process carries out air-cooled to the valve rod matrix; Can reduce the whole temperature of valve rod, prevent to produce high thermal stress between coating and the matrix, prevent the overheated cracking of coating; And can avoid the oxidized decarburization of coating, improve the over-all properties of anchoring strength of coating and coating.
(5) adopt this technology that stem surface is carried out the supersonic speed thermal spraying treatment, the anchoring strength of coating of its preparation is high, can not produce and peel off; The smooth densification of coating; Porosity is low, under the prerequisite that does not change the valve rod overall dimensional accuracy, and wear-corrosion resistance and the high temperature resistance heat that the has improved stem surface largely performance of shaking; Greatly improve the use properties of valve rod, can improve 2～5 times its work-ing life.
Description of drawings:
Fig. 1 is a stem surface supersonic flame thermal spray process synoptic diagram
Among the figure: 1---valve rod, 2---sprayed surface, 3---spraying flame, 4---swinging strut, 5---cooling system.
Embodiment:
Below in conjunction with accompanying drawing specific embodiment of the present invention is described further.With a kind of stem surface spraying Cr
3C
2-NiCr metal ceramic powder is an example, and its concrete technology is following:
The machinery preprocessing; According to the position that valve rod (1) is worn easily or is corroded, confirm the surface range of required spraying, stay shoulder at the sprayed surface two ends; Sprayed surface is avoided the end face at axle as far as possible; Dinting depth is 0.25mm at the position (2) of required spraying, and dinting depth is confirmed according to the coat-thickness 0.2～0.3mm of required spraying, reserved certain surplus.
Surface cleaning carries out purifying treatment through Solvent degreasing, washing, oven dry to required sprayed surface.
Surface coarsening adopts sand-blast device that required sprayed surface is carried out sandblasting, and its surface coarsening is to Ra2.5～13 μ m, and sandblast requires evenly, and sandblast is used pressurized air after accomplishing, and cleaning remains in the sand particle on surface.
Thermal pretreatment adopts vacuum electric furnace, and valve rod is preheated to 80～150 ℃, prevents that warm from producing oxidation to it.
Supersonic speed (kerosene type) flame heat spray is adopted in thermospray, and the temperature of flame is 2800～3100 ℃, and the speed of powder particle is 700～1200m/s, and spray distance is 130～1000mm, and dusty spray adopts Cr
3C
2-NiCr metal ceramic powder with piece-holder (4) on rotary frock clamp, covers the position that need not spray, and sprays then; During spraying, keep the LV rotation of valve rod with 300～1000mm/s, spray gun is with the LV move left and right of 10～100mm/s simultaneously; Powder melts in flame and produces high speed in the spraying process, impacts after the stem surface and matrix bond, piles up and gets up to form coating (3); Coat-thickness is 0.3～0.35mm, and for certain surplus is reserved in precision work, spraying process carries out air-cooled (5) to the valve rod matrix; Can reduce the whole temperature of valve rod, prevent that coating is overheated, improve coating quality.
Fine-grinding and polishing, spraying is accomplished the back coating is polished, and makes smooth surface, densification, and the valve rod overall dimensions is consistent, and its dimensional precision can reach Ra0.8～3.2 μ m, satisfies and assembles and user demand.
Through this technology stem surface is strengthened, wear-corrosion resistance and the high temperature resistance heat that can the improve valve rod largely performance of shaking prolongs 2～5 times of its work-ing lifes.
Claims (5)
1. stem surface metal-ceramic coating hot-spraying techniques; Comprise process procedures such as mechanical preprocessing, surface cleaning, surface coarsening, thermal pretreatment, thermospray, fine-grinding and polishing; It is characterized in that thermal pretreatment adopts vacuum electric furnace; Valve rod is preheated to 80～150 ℃, during thermospray valve rod matrix adopting air blast cooling device is cooled off, polishing back forms the high-performance metal ceramic coating of smooth densification, wear-resisting, corrosion-resistant, high bond strength, low porosity in stem surface.
2. a kind of stem surface metal-ceramic coating hot-spraying techniques according to claim 1 is characterized in that before the spraying mechanical preprocessing being carried out on its surface, under the position of required spraying, switches to specified size.
3. a kind of stem surface metal-ceramic coating hot-spraying techniques according to claim 1 is characterized in that adopting the supersonic flame thermospray to spray, and dusty spray can preferentially be selected Cr for use
3C
2-NiCr metal ceramic powder.
4. a kind of stem surface metal-ceramic coating hot-spraying techniques according to claim 1, it is characterized in that coating polishing after, smooth surface, densification, the valve rod overall dimensions is consistent, its dimensional precision satisfies assembling and user demand.
5. a kind of stem surface metal-ceramic coating hot-spraying techniques according to claim 1 is characterized in that Bond Strength of Coating is higher than 70MPa, and porosity is lower than 1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103027276A CN102787288A (en) | 2012-08-21 | 2012-08-21 | Hot spraying process of metal ceramic coating on surface of valve rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103027276A CN102787288A (en) | 2012-08-21 | 2012-08-21 | Hot spraying process of metal ceramic coating on surface of valve rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102787288A true CN102787288A (en) | 2012-11-21 |
Family
ID=47152872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103027276A Pending CN102787288A (en) | 2012-08-21 | 2012-08-21 | Hot spraying process of metal ceramic coating on surface of valve rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102787288A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965609A (en) * | 2012-11-29 | 2013-03-13 | 重庆跃进机械厂有限公司 | Process of performing hypersonic flame spraying on valve rod of diesel engine gas valve |
| CN103447968A (en) * | 2013-09-22 | 2013-12-18 | 叶红 | Shot peening process |
| CN103629436A (en) * | 2013-12-06 | 2014-03-12 | 镇江市华阳机电制造有限公司 | Anti-corrosion sealing process of pipeline shutoff valve for measuring |
| CN104308747A (en) * | 2014-08-28 | 2015-01-28 | 中国科学院重庆绿色智能技术研究院 | Method for performing sand blasting on 3D printed metal parts |
| CN107881456A (en) * | 2017-11-14 | 2018-04-06 | 郑媛媛 | A kind of valve rod preparation technology |
| CN109253080A (en) * | 2017-07-12 | 2019-01-22 | 上海宝钢工业技术服务有限公司 | Long-life composite coating plunger for plunger pump |
| CN110081231A (en) * | 2019-04-28 | 2019-08-02 | 常州思源电力设备有限公司 | A kind of valve rod and its preparation process |
| CN110370688A (en) * | 2019-07-04 | 2019-10-25 | 广联航空工业股份有限公司 | Frame-type composite material shaping mould supersonic speed hot-spraying technique method for repairing and mending |
| CN110735102A (en) * | 2019-11-15 | 2020-01-31 | 天宜上佳（天津）新材料有限公司 | production method of brake disc and brake disc cooling device |
| CN113020891A (en) * | 2019-12-24 | 2021-06-25 | 中国石油天然气股份有限公司 | Valve maintenance method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0210644A1 (en) * | 1985-07-03 | 1987-02-04 | The Perkin-Elmer Corporation | Aluminum and yttrium oxide containing thermal spray wire |
| CN1811005A (en) * | 2005-01-24 | 2006-08-02 | 北京安东奥尔工程技术有限责任公司 | Hot spray process to form alloy coating on the surface of oil pumping polished AOC alloy rod |
| CN101205599A (en) * | 2006-12-19 | 2008-06-25 | 山东九环石油机械有限公司 | Surface alloy coating hot-spraying technique for JHFZ alloy smooth sucker rod |
| CN102330049A (en) * | 2011-09-05 | 2012-01-25 | 广州市天河区金棠表面工程技术有限公司 | Door rod strengthening technology for air pump recycling regulation door |
-
2012
- 2012-08-21 CN CN2012103027276A patent/CN102787288A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0210644A1 (en) * | 1985-07-03 | 1987-02-04 | The Perkin-Elmer Corporation | Aluminum and yttrium oxide containing thermal spray wire |
| CN1811005A (en) * | 2005-01-24 | 2006-08-02 | 北京安东奥尔工程技术有限责任公司 | Hot spray process to form alloy coating on the surface of oil pumping polished AOC alloy rod |
| CN101205599A (en) * | 2006-12-19 | 2008-06-25 | 山东九环石油机械有限公司 | Surface alloy coating hot-spraying technique for JHFZ alloy smooth sucker rod |
| CN102330049A (en) * | 2011-09-05 | 2012-01-25 | 广州市天河区金棠表面工程技术有限公司 | Door rod strengthening technology for air pump recycling regulation door |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965609B (en) * | 2012-11-29 | 2014-11-26 | 重庆跃进机械厂有限公司 | Process of performing hypersonic flame spraying on valve rod of diesel engine gas valve |
| CN102965609A (en) * | 2012-11-29 | 2013-03-13 | 重庆跃进机械厂有限公司 | Process of performing hypersonic flame spraying on valve rod of diesel engine gas valve |
| 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 |
| CN103629436A (en) * | 2013-12-06 | 2014-03-12 | 镇江市华阳机电制造有限公司 | Anti-corrosion sealing process of pipeline shutoff valve for measuring |
| CN104308747A (en) * | 2014-08-28 | 2015-01-28 | 中国科学院重庆绿色智能技术研究院 | Method for performing sand blasting on 3D printed metal parts |
| CN109253080B (en) * | 2017-07-12 | 2021-11-02 | 上海宝钢工业技术服务有限公司 | Long-life composite coating plunger for plunger pump |
| CN109253080A (en) * | 2017-07-12 | 2019-01-22 | 上海宝钢工业技术服务有限公司 | Long-life composite coating plunger for plunger pump |
| CN107881456A (en) * | 2017-11-14 | 2018-04-06 | 郑媛媛 | A kind of valve rod preparation technology |
| CN110081231A (en) * | 2019-04-28 | 2019-08-02 | 常州思源电力设备有限公司 | A kind of valve rod and its preparation process |
| CN110370688A (en) * | 2019-07-04 | 2019-10-25 | 广联航空工业股份有限公司 | Frame-type composite material shaping mould supersonic speed hot-spraying technique method for repairing and mending |
| CN110735102A (en) * | 2019-11-15 | 2020-01-31 | 天宜上佳（天津）新材料有限公司 | production method of brake disc and brake disc cooling device |
| CN110735102B (en) * | 2019-11-15 | 2024-01-26 | 天宜上佳（天津）新材料有限公司 | Brake disc production method and brake disc cooling device |
| CN113020891A (en) * | 2019-12-24 | 2021-06-25 | 中国石油天然气股份有限公司 | Valve maintenance method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102787288A (en) | Hot spraying process of metal ceramic coating on surface of valve rod | |
| CN108559996B (en) | A kind of hydraulic support movable post outer surface laser melting coating restorative procedure | |
| CN102418065B (en) | Composite metal carbide wear-resistant coating and preparation process thereof | |
| CN101767261B (en) | Restoration and Protection Technology of Water Erosion Damage of Flow-through Parts of Steam Turbine | |
| US8471168B2 (en) | Methods of treating metal articles and articles made therefrom | |
| CN104264102B (en) | Preparation method of nickel base alloy coating on boiler water wall | |
| CN102115884B (en) | Preparation method of wear-resistant and corrosion-resistant composite coating | |
| CN101519704B (en) | Method for laser cladding Co-based alloy coating at blast-furnace tuyere | |
| CN103805992B (en) | A kind of method that strengthens metal hydroturbine runner blade surface with electric spark deposition in conjunction with laser melting coating | |
| CN111455306A (en) | Manufacturing process of nickel-based tungsten carbide wear-resistant coating of metal hard sealing ball valve | |
| US20130047394A1 (en) | Solid state system and method for refurbishment of forged components | |
| CN105177489A (en) | Method for enhancing corrosion and wear resistance of metal member surface | |
| JP2010000540A5 (en) | ||
| CN102166702A (en) | Laser cladding repairing method of piston rod | |
| CN105861974A (en) | Composite coating with impact erosion and cavitation erosion abrasion resistances | |
| CN110592523A (en) | Method for improving bonding strength of thermal spraying coating and metal substrate | |
| CN103088282A (en) | Method for thermal spraying of nanometer cemented carbide-polyurethane composite coat on surface of stainless steel | |
| CN105586562A (en) | Process for remanufacturing piston rod of concrete pump truck | |
| CN101532121B (en) | Technology for processing metal surface by arc spray melting | |
| CN104593766A (en) | Laser preparation method of erosion-resistant surface layer of spherical body of ball valve in coal chemical industry | |
| CN101070751A (en) | Technology for preparing anti-corrosion super-high-strength pumping-oil polish rod | |
| CN103924238B (en) | Method of Laser Cladding Ni-based Alloy+B4C Reinforcing Phase on Q550 Steel | |
| CN101113661A (en) | Novel self-lubricating iron-based coatings coupling preparation process | |
| CN104389780A (en) | High-pressure pump, plunger and surface enhancing processing technique for plunger | |
| CN102367559A (en) | Hot alkali corrosion resistant alloy coating for carbon steel container |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121121 |