CN1554856A - Turbine jet nozzle static and moving blade preventing solid microparticle from etching and its heat treatment method - Google Patents
Turbine jet nozzle static and moving blade preventing solid microparticle from etching and its heat treatment method Download PDFInfo
- Publication number
- CN1554856A CN1554856A CNA200310104127XA CN200310104127A CN1554856A CN 1554856 A CN1554856 A CN 1554856A CN A200310104127X A CNA200310104127X A CN A200310104127XA CN 200310104127 A CN200310104127 A CN 200310104127A CN 1554856 A CN1554856 A CN 1554856A
- Authority
- CN
- China
- Prior art keywords
- boronising
- air cooling
- temper
- process parameter
- heat treatment
- 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
Abstract
The static and moving blade used in supercritical and super-supercritical jet are made of 12%Cr heat resistant martensite steel and have the surface first boronizing treated with granular single phase boronizing agent to form one layer of single phase Fe2B structure combined firmly with the substrate and then tempering treated. The boronized layer has hardness as high as 1200-1600 HV, much higher than that of nitridated layer, and stable high temperature hardness. The present invention can meet the requirement of preventing solid particle erosion of supercritical and super-supercritical jet.
Description
Technical field
The present invention relates to a kind of nozzle of steam turbine, especially its quiet, moving vane and heat treatment method thereof, blade applications can prevent that solid particle corrodes on the nozzle of overcritical or supercritical turbine unit.
Background technique
Solid particle erosion is called for short SPE (Solid Partcie Erosion).The solid particle erosion of turbine materials mainly is created on the thermal power steam turbine group, especially supercritical pressure turbine.Its destruction to as if high-pressure regulation level nozzle vane and moving vane.The molded lines of solid particle erosion infringement governing stage nozzle vane and moving vane descends turbine thermodynamic efficiency, reduces the unit availability, increases the maintenance expenses of unit.For steam turbine set, the solid particle that causes the unit erosion is Fe
3O
4And Fe
2O
3This particle quality is hard, is to be become by the scale in the boiler tubing, and its size is minimum, and diameter is no more than 150 μ m usually.Scale be boiler material in long-term running with steam in oxygen reaction and the product that generates.Because its expansion coefficient is different with tubing, starts in the stopping process repeatedly at unit and peel off, and enter in the steam turbine high-pressure cylinder with vapor stream with particulate forms.The quantity that enters the solid particle in the steam turbine changes along with operating states of the units, and quantity is maximum during with startup, can reach thousands of PPb, then reduces to not enough 10PPb when normally moving.
The protecting method of steam turbine manufacturer solid particle erosion roughly can be divided three classes both at home and abroad now: improve the design of nozzle stator blade; Solid particle in removal or the minimizing steam; Improve the anti-erosion property of material.The first kind is to manage to reduce the striking velocity of particle and avoid the worst angle of shock as far as possible, but this will inevitably reduce the thermal efficiency of unit.Second class can use the good material of oxidation resistance as boiler superheater and reheater tube, and this can improve the unit cost undoubtedly greatly.The anti-erosion property that the 3rd class is improved material is not to be to select for use than 12%Cr steel better material to make parts such as high pressure nozzle blade, even because be considered to the best stellite of erosion wear resistance, its anti-solid particle erosion ability is almost identical with the 12%Cr steel.In fact, the most effectual way of improving anti-solid particle erosion ability is a coating, and this method is just showing more and more remarkable advantages.After experimental study that external main steam turbine manufactory process is long-term and installation reality are used checking, at nozzle vane and surperficial alloying surface treatment or the employing plasma spraying one deck diamondite etc. of adopting of moving vane.What the method for the anti-solid particle erosion of domestic unit now adopted is nitrogenize heat treatment.But this method can not satisfy design and the user's of power plant requirement for supercritical unit.
Summary of the invention
The objective of the invention is at above-mentioned steam turbine unit nozzle vane and moving vane surface hardness not high, can not bear solid particle and corrode, a kind of surface hardness height is provided, can prevent overcritical or supercritical turbine unit nozzle stator blade, moving vane and heat-treatment technology method thereof that solid particle corrodes.
Technical solution of the present invention is: at nozzle stator blade that is processed by 12%Cr martensite refractory steel and moving vane surface boronizing, the degree of depth of boride layer is 0.01-0.15mm, and its surface hardness is reached more than the 1200HV.
Said nozzle is quiet, the heat treatment method of moving vane, comprises boronising processing and temper:
(1) boronising is handled: the penetration enhancer that boronising is handled is granular single-phase boriding medium, and boronising treatment process parameter is 900 ℃-1100 ℃ * 3-20 hour, air cooling, and boronising is handled the back and is formed the single-phase Fe of one deck at blade surface
2The B tissue, the degree of depth of this boride layer is 0.01-0.15mm.
(2) temper: after boronising is finished dealing with, carry out temper again, the temper process parameter is 600 ℃-750 ℃ * 2-15 hour, air cooling.
Described boronising treatment process parameter is 950 ℃-1050 ℃ * 4-13 hour, air cooling; The degree of depth of boride layer is 0.03-0.12mm.
Described boronising treatment process parameter is 1000 ℃-1030 ℃ * 8-12 hour, air cooling; The degree of depth of boride layer is 0.05-0.10mm.
Good effect of the present invention is: the nozzle stator blade after boronising is finished dealing with improves greatly than the anti-solid particle erosion performance of the nozzle stator blade that via nitride is handled, the nitriding layer hardness of nitriding treatment is about 700-1000HV, and boride layer hardness can reach about 1200-1600HV, nitrided layer hardness than nitriding treatment is much higher, and use down at high temperature (566 ℃, 600 ℃), its hardness descends few, and this layer tissue and matrix bond are very firm, stable.Can satisfy the overcritical needs that corrode with the anti-solid particle of supercritical turbine group nozzle stator blade fully.
Embodiment
Embodiment one
Nozzle stator blade and moving vane adopt 12%Cr martensite heat-resisting steel material (as 2Cr12NiMo1W1V or 2Cr12Mo1VNbN etc.), carry out boronising processing and temper at blade surface: the penetration enhancer that boronising is handled is granular single-phase boriding medium, boronising treatment process parameter is 900 ℃ * 3 hours, air cooling, boronising is handled the back and is formed the single-phase Fe of one deck at blade surface
2The B tissue, the degree of depth of this boride layer is 0.01mm; Temper after boronising is finished dealing with, is carried out temper again, and the temper process parameter is 600 ℃ * 2 hours, air cooling.
Embodiment two
Boronising treatment process parameter is 950 ℃ * 4 hours, air cooling, and boronising is handled the back and is formed the single-phase Fe of one deck at blade surface
2The B tissue, the degree of depth of this boride layer is 0.03mm; Temper after boronising is finished dealing with, is carried out temper again, and the temper process parameter is 650 ℃ * 5 hours, air cooling.
Embodiment three
Boronising treatment process parameter is 1000 ℃ * 10 hours, air cooling, and boronising is handled the back and is formed the single-phase Fe of one deck at blade surface
2The B tissue, the degree of depth of this boride layer is 0.04mm; Temper after boronising is finished dealing with, is carried out temper again, and the temper process parameter is 680 ℃ * 8 hours, air cooling.
Embodiment four
Boronising treatment process parameter is 1030 ℃ * 12 hours, air cooling, and boronising is handled the back and is formed the single-phase Fe of one deck at blade surface
2The B tissue, the degree of depth of this boride layer is 0.05mm; Temper after boronising is finished dealing with, is carried out temper again, and the temper process parameter is 680 ℃ * 10 hours, air cooling.
Embodiment five
Boronising treatment process parameter is 1050 ℃ * 13 hours, air cooling, and boronising is handled the back and is formed the single-phase Fe of one deck at blade surface
2The B tissue, the degree of depth of this boride layer is 0.06mm; Temper after boronising is finished dealing with, is carried out temper again, and the temper process parameter is 700 ℃ * 12 hours, air cooling.
Embodiment six
Boronising treatment process parameter is 1070 ℃ * 16 hours, air cooling, and boronising is handled the back and is formed the single-phase Fe of one deck at blade surface
2The B tissue, the degree of depth of this boride layer is 0.08mm; Temper after boronising is finished dealing with, is carried out temper again, and the temper process parameter is 730 ℃ * 14 hours, air cooling.
Embodiment seven
Boronising treatment process parameter is 1080 ℃ * 18 hours, air cooling, and boronising is handled the back and is formed the single-phase Fe of one deck at blade surface
2The B tissue, the degree of depth of this boride layer is 0.10mm; Temper after boronising is finished dealing with, is carried out temper again, and the temper process parameter is 740 ℃ * 14 hours, air cooling.
Embodiment eight
Boronising treatment process parameter is 1100 ℃ * 20 hours, air cooling, and boronising is handled the back and is formed the single-phase Fe of one deck at blade surface
2The B tissue, the degree of depth of this boride layer is 0.15mm; Temper after boronising is finished dealing with, is carried out temper again, and the temper process parameter is 750 ℃ * 15 hours, air cooling.
In sum: boronising treatment process preferred parameter is 950 ℃-1050 ℃ * 4-13 hour, air cooling; The preferred depth of boride layer is 0.03-0.12mm; The temper process parameter is 650 ℃-720 ℃ * 5-10 hour.Boronising treatment process optimal parameter is 1000 ℃-1030 ℃ * 8-12 hour, air cooling; The temper process parameter is 680 ℃-700 ℃ * 6-8 hour.The optimum depth of boride layer is 0.05-0.10mm.
Claims (4)
1. an anti-solid particle corrodes quiet, the moving vane of nozzle of steam turbine, processes with 12%Cr martensite refractory steel, and it is characterized in that: described surface quiet, moving vane has boride layer.
2. the heat treatment method of quiet, the moving vane of the described nozzle of claim 1 comprises step:
(1) boronising is handled: the penetration enhancer that boronising is handled is granular single-phase boriding medium, and boronising treatment process parameter is 900 ℃-1100 ℃ of temperature, time 3-20 hour, and the degree of depth 0.01-0.15mm of boride layer, air cooling is to normal temperature then;
(2) temper: after boronising is finished dealing with, carry out temper again, the temper process parameter is 600 ℃-750 ℃ of temperature, and time 2-15 hour, air cooling was to normal temperature then.
3. the heat treatment method of, moving vane quiet according to the described nozzle of claim 2 is characterized in that: described boronising treatment process parameter is 950 ℃-1050 ℃ * 4-13 hour, air cooling; The degree of depth of boride layer is 0.03-0.12mm.
4. the heat treatment method of, moving vane quiet according to the described nozzle of claim 2 is characterized in that: described boronising treatment process parameter is 1000 ℃-1030 ℃ * 8-12 hour, air cooling; The degree of depth of boride layer is 0.05-0.10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200310104127XA CN1554856A (en) | 2003-12-26 | 2003-12-26 | Turbine jet nozzle static and moving blade preventing solid microparticle from etching and its heat treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200310104127XA CN1554856A (en) | 2003-12-26 | 2003-12-26 | Turbine jet nozzle static and moving blade preventing solid microparticle from etching and its heat treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1554856A true CN1554856A (en) | 2004-12-15 |
Family
ID=34333443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200310104127XA Pending CN1554856A (en) | 2003-12-26 | 2003-12-26 | Turbine jet nozzle static and moving blade preventing solid microparticle from etching and its heat treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1554856A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100417743C (en) * | 2005-10-08 | 2008-09-10 | 上海电气电站设备有限公司 | Boronizing treatment and heat treatment process of martensitic stainless steel for steam turbine nozzle set |
| CN100473805C (en) * | 2007-06-11 | 2009-04-01 | 上海外高桥第三发电有限责任公司 | Electric generating set small side road system and control method thereof |
| CN101008326B (en) * | 2006-01-27 | 2012-04-25 | 通用电气公司 | Nozzle blade airfoil profile for a turbine |
| CN101629232B (en) * | 2008-07-16 | 2012-05-09 | 上海重型机器厂有限公司 | Heat treatment method for supercritical turbine cylinder steel castings |
| CN101245531B (en) * | 2006-10-06 | 2012-11-28 | 格罗兹-贝克特公司 | Nozzle strip for textile processing |
| CN104805398A (en) * | 2015-03-23 | 2015-07-29 | 哈尔滨汽轮机厂有限责任公司 | Method for reducing boronizing deformation of nozzle set for steam turbine |
| CN112342492A (en) * | 2019-08-07 | 2021-02-09 | 北京龙威发电技术有限公司 | Method for boriding steam turbine nozzle made of 2Cr12NiW1Mo1V material |
-
2003
- 2003-12-26 CN CNA200310104127XA patent/CN1554856A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100417743C (en) * | 2005-10-08 | 2008-09-10 | 上海电气电站设备有限公司 | Boronizing treatment and heat treatment process of martensitic stainless steel for steam turbine nozzle set |
| CN101008326B (en) * | 2006-01-27 | 2012-04-25 | 通用电气公司 | Nozzle blade airfoil profile for a turbine |
| CN101245531B (en) * | 2006-10-06 | 2012-11-28 | 格罗兹-贝克特公司 | Nozzle strip for textile processing |
| CN100473805C (en) * | 2007-06-11 | 2009-04-01 | 上海外高桥第三发电有限责任公司 | Electric generating set small side road system and control method thereof |
| CN101629232B (en) * | 2008-07-16 | 2012-05-09 | 上海重型机器厂有限公司 | Heat treatment method for supercritical turbine cylinder steel castings |
| CN104805398A (en) * | 2015-03-23 | 2015-07-29 | 哈尔滨汽轮机厂有限责任公司 | Method for reducing boronizing deformation of nozzle set for steam turbine |
| CN112342492A (en) * | 2019-08-07 | 2021-02-09 | 北京龙威发电技术有限公司 | Method for boriding steam turbine nozzle made of 2Cr12NiW1Mo1V material |
| CN112342492B (en) * | 2019-08-07 | 2022-08-09 | 北京国能龙威发电技术有限公司 | Method for boriding steam turbine nozzle made of 2Cr12NiW1Mo1V material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100828276B1 (en) | Carbo-nitrided case hardened martensitic stainless steels | |
| US20100304084A1 (en) | Protective coatings which provide erosion resistance, and related articles and methods | |
| JP5244495B2 (en) | Parts for rotating machinery | |
| US20100028711A1 (en) | Thermal barrier coatings and methods of producing same | |
| US7758968B2 (en) | Component with thermal barrier coating and erosion-resistant layer | |
| JP2004169176A (en) | Cobalt-based alloy for coating equipment liable to erosion by liquid | |
| CN1554856A (en) | Turbine jet nozzle static and moving blade preventing solid microparticle from etching and its heat treatment method | |
| EP2546384B1 (en) | Steam turbine member | |
| KR20080063449A (en) | Method for treating organs subject to erosion by liquids and anti-erosion coating alloy | |
| US20100304181A1 (en) | Protective coatings which provide erosion resistance, and related articles and methods | |
| US5547769A (en) | Method and coating for protecting against corrosive and erosive attacks | |
| RU2473713C2 (en) | Method of applying coat and antirust coat for turbine components | |
| EP3129596B1 (en) | Method of protecting a component of a turbomachine from liquid droplets erosion, component and turbomachine | |
| JP5455327B2 (en) | Method for surface treatment of ferrite / martensite 9-12% Cr steel | |
| JP2002544396A (en) | Structural member and method for forming a protective coating on the structural member | |
| Higuera Hidalgo et al. | Characterisation of NiCr flame and plasma sprayed coatings for use in high temperature regions of boilers | |
| JP2008307680A (en) | Surface treatment method of cr steel | |
| US20020014208A1 (en) | Method of finish treating a steel blade for use in turbomachinery | |
| JP4038196B2 (en) | Clean atmosphere heat treatment method and heat treatment apparatus for coated turbine components | |
| Tkhabisimov et al. | Research results of solid particle erosion resistance of 20GL steel with boriding | |
| JP2008275035A (en) | Steam valve for steam turbine | |
| JP2006176866A (en) | Surface treatment method for base material | |
| JPS6259205B2 (en) | ||
| JP2015165045A (en) | Coated article and method for manufacturing coating | |
| Taherkhani et al. | The Effect of Plasma Nitriding Parameters on Component Complex Geometry |
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 |