CN1598039A - Process for compound ion coating film on final stage blade surface of steam turbine - Google Patents
Process for compound ion coating film on final stage blade surface of steam turbine Download PDFInfo
- Publication number
- CN1598039A CN1598039A CN 200410043735 CN200410043735A CN1598039A CN 1598039 A CN1598039 A CN 1598039A CN 200410043735 CN200410043735 CN 200410043735 CN 200410043735 A CN200410043735 A CN 200410043735A CN 1598039 A CN1598039 A CN 1598039A
- Authority
- CN
- China
- Prior art keywords
- blade
- steam turbine
- thickness
- ion
- stage blade
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000011248 coating agent Substances 0.000 title claims abstract description 4
- 238000000576 coating method Methods 0.000 title claims abstract description 4
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 12
- 238000010884 ion-beam technique Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000005030 aluminium foil Substances 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims abstract description 4
- 230000007704 transition Effects 0.000 claims description 5
- 230000008021 deposition Effects 0.000 claims description 3
- 239000007888 film coating Substances 0.000 claims description 3
- 238000009501 film coating Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 abstract 1
- 239000012459 cleaning agent Substances 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 239000011651 chromium Substances 0.000 description 7
- 238000007747 plating Methods 0.000 description 5
- CXOWYMLTGOFURZ-UHFFFAOYSA-N azanylidynechromium Chemical compound [Cr]#N CXOWYMLTGOFURZ-UHFFFAOYSA-N 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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- Physical Vapour Deposition (AREA)
Abstract
A method for composite ion coating film on surface of steam turbine low pressure late stage blade. This invention as following: cleaning the blade by agent ultrasonic cleans the blade. Preheatnig and removing the cleaning agent and water sealing the position which do not need leak layer treatment by aluminium foil, and putted into the ion beam compound processor, bombarding blade by Cr and N containing ion beam, forming work layer. The advantages are simply process, low cost, and reliable safe.
Description
Technical field:
The present invention relates to a kind of ion film-plating method, be specifically related to a kind of ion film-plating method of low-pressure last stage blade of steam turbine.
Background technology:
In the steam turbine rotation process, a plurality of spinner blades that will be combined into vane group or blade row usually are arranged on the turbine shaft, and these spinner blades come the driving steam turbine axle by transmitting inertia from flow media.In transmittance process, be subjected to the erosion of medium in the low-pressure last stage blade trailing edge root near the back of the body arc, the phenomenon of seriously corroded often appears after operation.
Summary of the invention:
The present invention is not subjected to the water erosion in order to protect the low-pressure last stage blade root, and a kind of compound ion film coating method is provided.The present invention is achieved in that a, with clean-out system blade is cleaned, and removes the greasy dirt on surface; B, blade is cleaned, remove the suspended substance on hole and surface with ultrasonic wave; Clean-out system and water stain is removed in c, preheating 30～60 minutes under 60～100 ℃ condition then; D, the position that will not need to carry out the compound ion coating film treatment with aluminium foil seal, and put into ionic fluid compound surface handler, and control pressure is 5 * 10
-4Pa～1 * 10
-2Pa, temperature is room temperature～150 ℃; E, with containing Cr and N ion beam bombardment blade, the weight ratio of Cr, N is (80～90): (10～20), forming thickness is the transition layer of 0.1～0.5 μ m; G, with Cr, N ion deposition, form the CrN working lining, thickness is 10～12 μ m.The present invention carries on the back the arc place and has formed one deck chromium nitride protective coating in the last stage blade heel; this protective membrane can improve the solidity to corrosion of blade; blade after the processing is compared (performance comparison the results are shown in Table 1) with untreated blade; the surface hardness of blade improves more than 5 times; wear resistance improves more than 10 times; high cycle fatigue improves 50～70MPa, and the low cycle fatigue cycle index improves more than 1000 times.The present invention has the advantage that technology is simple, cost is low, safe and reliable.
Table 1
| State | Surface hardness | The polishing scratch degree of depth (μ m) | High cycle fatigue MPa | The low cycle fatigue cycle index |
| Original | HV420 | 1200 | 400 | 6596 |
| Ion film plating | HV3000 | 96 | 450～470 | 8674 |
| Contrast | Greater than 5 times | Greater than 10 times | Improve 50～70MPa | Improve more than 1000 |
Embodiment:
Embodiment one: present embodiment is carried out according to following step: a, with clean-out system blade is cleaned, remove the greasy dirt on surface; B, blade is cleaned, remove hole and surfactant suspension thing with ultrasonic wave; Clean-out system and water stain is removed in c, preheating 30～60 minutes under 60～100 ℃ condition then; D, the position that will not need to carry out the ion film plating processing with aluminium foil seal, and put into ionic fluid compound surface handler, and control pressure is 5 * 10
-4Pa～1 * 10
-2Pa, temperature is room temperature～150 ℃; E, usefulness contain the ion beam bombardment blade of Cr and N, and wherein the weight ratio of Cr, N atom is (80～90): (10～20), and forming thickness is the transition layer of 0.1～0.5 μ m; G, low energy Cr, N ion deposition are become the working lining of CrN, forming thickness is 10～12 μ m, cools off 0.5～1.5 hour, and blade surface has plated one deck chromium nitride cladding material.
Embodiment two: what present embodiment and embodiment one were different is, preheating is 30 minutes under 80 ℃ condition, and pressure is 5 * 10
-4Pa, the weight ratio of Cr, N atom is 85: 15, and the thickness of transition layer is 0.5 μ m, and the thickness of working lining is 10 μ m.Other processes are identical with embodiment one with processing parameter.
Claims (2)
1, the compound ion film coating method of low-pressure last stage blade of steam turbine is characterized in that it is achieved in that a, with clean-out system blade is cleaned, and removes the greasy dirt on surface; B, blade is cleaned, remove the suspended substance on hole and surface with ultrasonic wave; Clean-out system and water stain is removed in c, preheating 30～60 minutes under 60～100 ℃ condition then; D, the position that will not need to carry out the compound ion coating film treatment with aluminium foil seal, and put into ionic fluid compound surface handler, and control pressure is 5 * 10
-4Pa～1 * 10
-2Pa, temperature is room temperature～150 ℃; E, with containing Cr and N ion beam bombardment blade, the weight ratio of Cr, N is (80～90): (10～20), forming thickness is the transition layer of 0.1～0.5 μ m; G, with Cr, N ion deposition, form the CrN working lining, thickness is 10～12 μ m.
2, the compound ion film coating method of low-pressure last stage blade of steam turbine according to claim 1 is characterized in that under 80 ℃ condition preheating 30 minutes, and pressure is 5 * 10
-4Pa, the weight ratio of Cr, N atom is 85: 15, and the thickness of transition layer is 0.5 μ m, and the thickness of working lining is 10 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100437359A CN1313636C (en) | 2004-07-22 | 2004-07-22 | Process for compound ion coating film on final stage blade surface of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100437359A CN1313636C (en) | 2004-07-22 | 2004-07-22 | Process for compound ion coating film on final stage blade surface of steam turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1598039A true CN1598039A (en) | 2005-03-23 |
| CN1313636C CN1313636C (en) | 2007-05-02 |
Family
ID=34665418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100437359A Expired - Lifetime CN1313636C (en) | 2004-07-22 | 2004-07-22 | Process for compound ion coating film on final stage blade surface of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1313636C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887049A (en) * | 2010-04-19 | 2010-11-17 | 北京欧宁航宇检测技术有限公司 | Automatic detection method of ultrasonic phased array of turbine blade root |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2928813B2 (en) * | 1988-02-10 | 1999-08-03 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Unsaturated high pressure sodium lamp |
-
2004
- 2004-07-22 CN CNB2004100437359A patent/CN1313636C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887049A (en) * | 2010-04-19 | 2010-11-17 | 北京欧宁航宇检测技术有限公司 | Automatic detection method of ultrasonic phased array of turbine blade root |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1313636C (en) | 2007-05-02 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070502 |
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| CX01 | Expiry of patent term |