CN1759978A - Method for soldering external surface of steam admission intubation for main steam of steam turbine by using stellite - Google Patents
Method for soldering external surface of steam admission intubation for main steam of steam turbine by using stellite Download PDFInfo
- Publication number
- CN1759978A CN1759978A CN 200510010528 CN200510010528A CN1759978A CN 1759978 A CN1759978 A CN 1759978A CN 200510010528 CN200510010528 CN 200510010528 CN 200510010528 A CN200510010528 A CN 200510010528A CN 1759978 A CN1759978 A CN 1759978A
- Authority
- CN
- China
- Prior art keywords
- incubated
- per hour
- inlet sleeve
- steam turbine
- turbine main
- 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
Images
Landscapes
- Heat Treatment Of Articles (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
A technology for argon arc welding of Stellite alloy on the external surface of master steam inlet tube for turbine includes such steps as turning on the surface of raw tube, penetrant inspection, preheating, stacking Stellite alloy on its external surface, argon arc welding, heat treating for removing stress, turning and penetrant inspection. Its advantages are high resistance to corrosion, flushing and vibration.
Description
Technical field
The present invention relates to the welding method of steam turbine main steam inlet sleeve outer surface.
Background technology
In the steam turbine industry, supercritical unit main steam inlet sleeve is worked under supercritical behavior (566 ℃ of operating temperatures, pressure 24.2MPa) for a long time, owing to be subjected to washing away and shock effect of high velocity air, causes damage in intubate and preceding cylinder connecting place easily.
Summary of the invention
The present invention is in order to solve existing supercritical unit main steam inlet sleeve outer surface and to be subjected to washing away of high velocity air and shaking, make the damaged bad problem of steam turbine main steam inlet sleeve and preceding cylinder connecting place, proposed a kind of method with stellite welding steam turbine main steam inlet sleeve outer surface, the concrete technical scheme that addresses this problem is as follows:
The present invention is as follows with the method step of stellite welding steam turbine main steam inlet sleeve outer surface:
Step 1, steam turbine main steam inlet sleeve outer surface is carried out turning processing by designing requirement;
Step 2, will carry out dye penetrant inspection, the defective of the welding quality of determining to have no effect through the steam turbine main steam inlet sleeve after the step 1 processing;
Step 3, to carry out preheating through the steam turbine main steam inlet sleeve of step 2, when reaching 400～700 ℃ of scopes, temperature applies stellite at steam turbine main steam inlet sleeve outer surface heap, adopt argon arc welding method to weld, welding current is 220～320A, argon flow amount is 24～28L/min, positioner speed is 7r/min, wire feed rate was 28～48 (showing digital control by automatic argon arc welder), track pitch 10.0mm, to welding zone is that steam turbine main steam inlet sleeve lower end length is that the outer round surface of 540mm welds, will divide two-layer carrying out during welding, the interlayer welding temperature is controlled at 400～700 ℃;
Step 4, will carry out destressing heat treatment, when steam turbine main steam inlet sleeve is warming up to 530～600 ℃, be incubated 1～4 hour through the steam turbine main steam inlet sleeve of step 3 postwelding; With per hour 25 ℃ be cooled to 180～250 ℃, be incubated 20～40 minutes; With per hour 55 ℃ be warming up to 630～700 ℃, be incubated 3～6 hours; With per hour 25 ℃ be cooled to 80～150 ℃, be incubated after 20～40 minutes, with per hour 55 ℃ be warming up to 630～700 ℃, be incubated 3～6 hours; With per hour 25 ℃ be cooled to 80～150 ℃, be incubated 20～40 minutes;
Step 5, will carry out turning processing by the size of designing requirement through the steam turbine main steam inlet sleeve after the step 4 heat treatment;
Step 6, the steam turbine main steam inlet sleeve after step 5 is carried out dye penetrant inspection.
The present invention adopts the outer round surface welding stellite of argon arc welding method to steam turbine main steam inlet sleeve, the corrosion resistance of steam turbine main steam inlet sleeve product, anti-ability of washing away with anti-vibration have been improved significantly, improved 2 times the service life of intubate, cost is 50% of a former steam turbine main steam inlet sleeve.
Description of drawings
Fig. 1 is a steam turbine main steam inlet sleeve welding front cross sectional view in the embodiment one, and Fig. 2 is the curve map of heat treatment process in the embodiment two, and Fig. 3 is the cutaway view behind the steam turbine main steam inlet sleeve welding stellite in the embodiment one.
The specific embodiment
The specific embodiment one: present embodiment is realized by the following step with the method for stellite welding steam turbine main steam inlet sleeve outer surface:
Step, steam turbine main steam inlet sleeve (material 1Cr9MoVNbN) outer surface is carried out turning processing by the designing requirement (see figure 1);
Step 2, will carry out dye penetrant inspection, the defective of the welding quality of determining to have no effect through the steam turbine main steam inlet sleeve after the step 1 processing;
Step 3, to carry out preheating through the steam turbine main steam inlet sleeve of step 2, when reaching 400～700 ℃ of scopes, preheat temperature applies stellite (chemical composition of stellite sees Table 1) at steam turbine main steam inlet sleeve outer round surface heap, adopt argon arc welding method to weld, welding current is 220～320A, argon flow amount is 24～28L/min, positioner speed is 7r/min, wire feed rate was 28～48 (showing digital control by automatic argon arc welder), track pitch 10.0mm, to welding zone is that steam turbine main steam inlet sleeve lower end length is that the outer round surface of 540mm welds, weld two-layer carrying out of time-division, because of stellite once can not be piled too much deposited, the interlayer welding temperature is controlled at 400～700 ℃, operation is careful during the welding ground floor, adopt little standard, reduce the fusion penetration of parent metal as far as possible, the welding sermon evenly, seamlessly transit, by the design size welding, note strengthening self check in the welding process, the discovery defective is in time removed, repair, finally make steam turbine main steam inlet sleeve outer round surface weld the stellite of a layer thickness greater than 1mm; To the purpose that steam turbine main steam inlet sleeve carries out preheating, be in order to prevent that overlay and parent metal from cracking on the one hand, be in order to prevent to increase the fusion penetration of parent metal, to reduce dilution rate on the other hand;
Step 4, will carry out destressing heat treatment, when steam turbine main steam inlet sleeve is warming up to 530～600 ℃, be incubated 1～4 hour through the steam turbine main steam inlet sleeve of step 3 postwelding; With per hour 25 ℃ be cooled to 180～250 ℃, be incubated 20～40 minutes; With per hour 55 ℃ be warming up to 630～700 ℃, be incubated 3～6 hours; With per hour 25 ℃ be cooled to 80～150 ℃, be incubated 20～40 minutes; With per hour 55 ℃ be warming up to 630～700 ℃, be incubated 3～6 hours; With per hour 25 ℃ be cooled to 80～150 ℃, be incubated 20～40 minutes (see figure 2)s.The temper of postwelding not only plays the removal welding stress, prevent the effect that weld crack produces, simultaneously heap coating metal and heat affected area all there is certain influence, promptly improved the heat affected area tissue, crystal grain thinning, reduce hardness, brought into play the precipitation strength characteristic of overlay cladding cobalt base hard alloy again, the more conventional temper of heap coating hardness is significantly improved;
Step 5, will be when the steam turbine main steam inlet sleeve after the step 4 heat treatment carry out turning and process most 1mm to the stellite of steam turbine main steam inlet sleeve outer round surface welding by the size (as Fig. 3) of designing requirement till;
Step 6, the steam turbine main steam inlet sleeve after step 5 is carried out dye penetrant inspection.
The specific embodiment two: the difference of the present embodiment and the specific embodiment one is the steam turbine main steam inlet sleeve through the step 3 postwelding is carried out destressing heat treatment, when steam turbine main steam inlet sleeve is warming up to 580 ℃, is incubated 2 hours; With per hour 25 ℃ be cooled to 230 ℃, be incubated 30 minutes; With per hour 55 ℃ be warming up to 680 ℃, be incubated 4 hours; With per hour 25 ℃ be cooled to 130 ℃, be incubated 30 minutes; With per hour 55 ℃ be warming up to 680 ℃, be incubated 4 hours; With per hour 25 ℃ be cooled to 130 ℃, be incubated 30 minutes (see figure 2)s.Other step is identical with the specific embodiment one.
The specific embodiment three: the difference of the present embodiment and the specific embodiment one is the steam turbine main steam inlet sleeve through the step 3 postwelding is carried out destressing heat treatment, when steam turbine main steam inlet sleeve is warming up to 530 ℃, is incubated 1 hour; With per hour 25 ℃ be cooled to 180 ℃, be incubated 20 minutes; With per hour 55 ℃ be warming up to 630 ℃, be incubated 3 hours; With per hour 25 ℃ be cooled to 80 ℃, be incubated 20 minutes; With per hour 55 ℃ be warming up to 630 ℃, be incubated 3 hours; With per hour 25 ℃ be cooled to 80 ℃, be incubated 20 minutes.Other step is identical with the specific embodiment one.
The specific embodiment four: the difference of the present embodiment and the specific embodiment one is the steam turbine main steam inlet sleeve through the step 3 postwelding is carried out destressing heat treatment, when steam turbine main steam inlet sleeve is warming up to 600 ℃, is incubated 3 hours; With per hour 25 ℃ be cooled to 250 ℃, be incubated 40 minutes; With per hour 55 ℃ be warming up to 700 ℃, be incubated 5 hours; With per hour 25 ℃ be cooled to 150 ℃, be incubated 40 minutes; With per hour 55 ℃ be warming up to 700 ℃, be incubated 5 hours; With per hour 25 ℃ be cooled to 150 ℃, be incubated 40 minutes.Other step is identical with the specific embodiment one.
The chemical composition of stellite sees Table 1:
Table 1 weight %
| The trade mark | C | Mn | W | Ni | Cr | Mo | Fe | Si | Co |
| Stellite | 09～1.4 | ≤1.0 | 3.0～6.0 | 2.0～3.0 | 26.0～32.0 | ≤1.0 | ≤3.0 | 0.4～2.0 | Surplus |
Claims (4)
1, with the method for stellite welding steam turbine main steam inlet sleeve outer surface, it is characterized in that the step of this method is as follows:
Step 1, steam turbine main steam inlet sleeve outer surface is carried out turning processing by designing requirement;
Step 2, will carry out dye penetrant inspection, the defective of the welding quality of determining to have no effect through the steam turbine main steam inlet sleeve after the step 1 processing;
Step 3, to carry out preheating through the steam turbine main steam inlet sleeve of step 2, when reaching 400～700 ℃ of scopes, temperature applies stellite at steam turbine main steam inlet sleeve outer surface heap, adopt argon arc welding method to weld, welding current is 220～320A, argon flow amount is 24～28L/min, positioner speed is 7r/min, wire feed rate was 28～48 (showing digital control by automatic argon arc welder), track pitch 10.0mm, to welding zone is that steam turbine main steam inlet sleeve lower end length is that the outer round surface of 540mm welds, will divide two-layer carrying out during welding, the interlayer welding temperature is controlled at 400～700 ℃;
Step 4, will carry out destressing heat treatment, when steam turbine main steam inlet sleeve is warming up to 530～600 ℃, be incubated 1～4 hour through the steam turbine main steam inlet sleeve of step 3 postwelding; With per hour 25 ℃ be cooled to 180～250 ℃, be incubated 20～40 minutes; With per hour 55 ℃ be warming up to 630～700 ℃, be incubated 3～6 hours; With per hour 25 ℃ be cooled to 80～150 ℃, be incubated after 20～40 minutes, with per hour 55 ℃ be warming up to 630～700 ℃, be incubated 3～6 hours; With per hour 25 ℃ be cooled to 80～150 ℃, be incubated 20～40 minutes;
Step 5, will carry out turning processing by the size of designing requirement through the steam turbine main steam inlet sleeve after the step 4 heat treatment;
Step 6, the steam turbine main steam inlet sleeve after step 5 is carried out dye penetrant inspection.
2, the method with stellite welding steam turbine main steam inlet sleeve outer surface according to claim 1 is characterized in that steam turbine main steam inlet sleeve heat treatment process is, when being warming up to 580 ℃, is incubated 2 hours; With per hour 25 ℃ be cooled to 230 ℃, be incubated 30 minutes; With per hour 55 ℃ be warming up to 680 ℃, be incubated 4 hours; With per hour 25 ℃ be cooled to 130 ℃, be incubated 30 minutes; With per hour 55 ℃ be warming up to 680 ℃, be incubated 4 hours; With per hour 25 ℃ be cooled to 130 ℃, be incubated 30 minutes.
3, the method with stellite welding steam turbine main steam inlet sleeve outer surface according to claim 1 is characterized in that steam turbine main steam inlet sleeve heat treatment process is, when being warming up to 530 ℃, is incubated 1 hour; With per hour 25 ℃ be cooled to 180 ℃, be incubated 20 minutes; With per hour 55 ℃ be warming up to 630 ℃, be incubated 3 hours; With per hour 25 ℃ be cooled to 80 ℃, be incubated 20 minutes; With per hour 55 ℃ be warming up to 630 ℃, be incubated 3 hours; With per hour 25 ℃ be cooled to 80 ℃, be incubated 20 minutes.Other step is identical with the specific embodiment one.
4, the method with stellite welding steam turbine main steam inlet sleeve outer surface according to claim 1 is characterized in that steam turbine main steam inlet sleeve heat treatment process is, when being warming up to 600 ℃, is incubated 3 hours; With per hour 25 ℃ be cooled to 250 ℃, be incubated 40 minutes; With per hour 55 ℃ be warming up to 700 ℃, be incubated 5 hours; With per hour 25 ℃ be cooled to 150 ℃, be incubated 40 minutes; With per hour 55 ℃ be warming up to 700 ℃, be incubated 5 hours; With per hour 25 ℃ be cooled to 150 ℃, be incubated 40 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100105288A CN100457384C (en) | 2005-11-11 | 2005-11-11 | Method for soldering external surface of steam admission intubation for main steam of steam turbine by using stellite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100105288A CN100457384C (en) | 2005-11-11 | 2005-11-11 | Method for soldering external surface of steam admission intubation for main steam of steam turbine by using stellite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1759978A true CN1759978A (en) | 2006-04-19 |
| CN100457384C CN100457384C (en) | 2009-02-04 |
Family
ID=36706262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100105288A Active CN100457384C (en) | 2005-11-11 | 2005-11-11 | Method for soldering external surface of steam admission intubation for main steam of steam turbine by using stellite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100457384C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974917A (en) * | 2012-11-09 | 2013-03-20 | 哈尔滨汽轮机厂有限责任公司 | Method of gas turbine combustion chamber stellite alloy bead weld |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4903888A (en) * | 1988-05-05 | 1990-02-27 | Westinghouse Electric Corp. | Turbine system having more failure resistant rotors and repair welding of low alloy ferrous turbine components by controlled weld build-up |
| US5049716A (en) * | 1989-08-07 | 1991-09-17 | Westinghouse Electric Corp. | Steam turbine having applied novel erosion resistant surfaces and methods for applying these surfaces |
| JP3797449B2 (en) * | 1997-09-10 | 2006-07-19 | 石川島播磨重工業株式会社 | High temperature mandrel for rolling equipment |
| CN1296172C (en) * | 2004-05-19 | 2007-01-24 | 哈尔滨汽轮机厂有限责任公司 | Steam turbine bulkhead electron-beam welding method |
-
2005
- 2005-11-11 CN CNB2005100105288A patent/CN100457384C/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974917A (en) * | 2012-11-09 | 2013-03-20 | 哈尔滨汽轮机厂有限责任公司 | Method of gas turbine combustion chamber stellite alloy bead weld |
| CN102974917B (en) * | 2012-11-09 | 2015-03-18 | 哈尔滨汽轮机厂有限责任公司 | Stellite alloy bead weld method of gas turbine combustion chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100457384C (en) | 2009-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1775061B1 (en) | Hole repair technique | |
| JP3175109B2 (en) | Repair methods for turbine component wear surfaces. | |
| CN1100642C (en) | Welf repair process and article repaired thereby | |
| JP2002523240A (en) | Modification and repair method of turbine rotor | |
| CN1800425A (en) | Preform and method of repairing nickel-base superalloys and components repaired thereby | |
| US20070215586A1 (en) | Nickel alloy welding wire | |
| CN110102878B (en) | CMT and laser cladding composite repair method for inner hole of flat head sleeve of main shaft of rolling mill | |
| CN102189316A (en) | Submerged-arc welding overlaying repairing method for stainless steel hot rolled delivery roll | |
| Liu et al. | Effect of heat treatment on tensile properties of friction stir welded joints of 2219-T6 aluminium alloy | |
| DE102005035585B3 (en) | Producing a welded joint between a plated ferritic part and an austenitic part comprises welding a root of austenitic material, welding an intermediate layer of nickel alloy forming a weld seam of nickel-based material | |
| CN103990889B (en) | The welding procedure of build-up wear-resistant layers of copper in a kind of crosshead pin-and-hole | |
| CN102031513B (en) | Restoring method of last-stage blade of steam turbine | |
| CN113319272B (en) | Metal ceramic powder material for wear-resistant layer of section steel conveying roller and manufacturing method of wear-resistant layer | |
| CN1674408A (en) | Electric power generator, steam turbine rotor spindle repaired by laser and repairing method thereof | |
| CN110747458A (en) | Method for repairing crankshaft of hot-rolling fixed-width press | |
| US20100059572A1 (en) | Weld repair process and article repaired thereby | |
| CN1759979A (en) | Method for welding external surface of steam admission spile for mains team in steam turbine through stellite | |
| CN100457384C (en) | Method for soldering external surface of steam admission intubation for main steam of steam turbine by using stellite | |
| CN1851007A (en) | Concrete conveying pipe production process | |
| US20130047394A1 (en) | Solid state system and method for refurbishment of forged components | |
| CN101623688A (en) | High wear-resistant roller screen roll and build-up welding process | |
| CN111421296B (en) | On-line surfacing repair method for maintaining weld joints of carbon steel branch pipe | |
| CN112877569A (en) | Nickel-based alloy powder for laser cladding and laser cladding method | |
| CN115007968A (en) | Process for surfacing Stellite6 alloy on surface of 17-4PH precipitation-hardened stainless steel | |
| CN108637428A (en) | A kind of high intensity gear ring class cast steel part defect weldering repair renovation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |