CN103659201A - Machining technology of turbine blade with water corrosion prevention achieved by means of laser cladding - Google Patents
Machining technology of turbine blade with water corrosion prevention achieved by means of laser cladding Download PDFInfo
- Publication number
- CN103659201A CN103659201A CN201310679221.1A CN201310679221A CN103659201A CN 103659201 A CN103659201 A CN 103659201A CN 201310679221 A CN201310679221 A CN 201310679221A CN 103659201 A CN103659201 A CN 103659201A
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- blade
- laser melting
- melting coating
- laser cladding
- milling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/02—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine or like blades from one piece
Abstract
The invention provides a machining technology of a turbine blade with water corrosion prevention achieved by means of laser cladding. According to the machining technology of the turbine blade, the machining precision of the blade can be guaranteed, the fusion cladding amount is small, and tool loss is reasonable. The machining technology of the turbine blade with the water corrosion prevention achieved by means of laser cladding comprises the steps of (1) blank manufacturing; (2) forming through die forging; (3) heat treatment; (4) rough milling of the molded surface of a blank and milling of a laser cladding groove, wherein a certain redundant amount of a forge piece is removed through milling, and the laser cladding groove is machined until the laser cladding groove is within a certain tolerance range; (5) laser cladding of stellite in the laser cladding groove; (6) correction of a blade by means of a pressing machine after laser cladding; (7) radiographic and penetration inspection of a laser cladding area; (8) repairing welding of an unqualified portion, in the laser cladding area, of the blade through argon arc welding; (9) distressing and heat treatment; (10) comprehensive milling, wherein the blade is machined until the blade is within the tolerance range; (11) polishing, wherein machining tool marks on the surface of the blade are removed through polishing; (12) shot blasting of the surface of the blade.
Description
Technical field
The present invention relates to the processing technique field of turbine blade, especially relate to and adopt laser cladding method to carry out the manufacture field of the turbine blade of anti-water erosion processing, be specially a kind of processing technology that adopts the turbine blade of the anti-water erosion of laser melting coating.
Background technology
Laser melting coating stellite is the current newer anti-water erosion surface strengthening technology of blade, this technology by laser by stellite powder smelting and fast coolingly form metallurgical binding with blade matrix, it utilizes the high rigidity of stellite and high-wearing feature to improve blade water erosion resistent ability, more traditional soldering bond strength is high, and can on steam turbine, directly repair.
Although relatively traditional soldering laser melting coating advantage is obvious, but also there is the Some features of self, as residual stress after laser melting coating greatly, is significantly corrected easy to crack, because hardness is high, cause that cutter loss is large and overlap joint surface quality is poor, therefore the application characteristic on turbine blade for laser melting and coating technique, redesign the manufacturing process of exploring turbine blade, reasonable arrangement laser melting coating operation is very important.
Summary of the invention
The object of this invention is to provide and be a kind ofly conducive to guarantee that the blade processing accuracy of manufacture, cladding deflection are relatively little, the rational a kind of turbine Blade Machining technique of cutter loss.
Its technical scheme is such, it is characterized in that: it comprises following technological process:
(1) base, presses the steps such as neck and blade pulling that raw material are distributed according to blade shape by jumping-up, blade root raw material, makes blank;
(2) die-forging forming, by described blank forging to the blade forging that approaches blade shape;
(3) heat treatment, meets the demands by being heat-treated to performance to the blade forging after described die-forging forming;
(4) rough mill blank profile and milling laser melting coating groove, by milling, process and remove certain forging surplus, and described laser melting coating groove is machined in the margin of tolerance;
(5) at described laser melting coating groove inner laser cladding stellite;
(6) proofread and correct, the blade after adopting forcing press to cladding is proofreaied and correct;
(7) flaw detection, carries out ray and penetrant inspection to stellite laser melting coating region;
(8) repair welding, carries out argon arc welding repair welding to the underproof blade in described cladding region;
(9) destressing heat treatment, removes the residual stress that laser melting coating, correction and repair welding produce;
(10) comprehensive milling, by blade processing to dimensional tolerance range;
(11) polishing, removes blade surface processing tool marks;
(12) shot-peening, carries out bead to blade surface, forms compressive stress layer.
It is further characterized in that:
Described die-forging forming, different according to blade dimensions, monolateral surplus 3 mm～5mm;
Described blank profile and the milling laser melting coating groove rough milled, is processed blade processing to arc shaped surface in convex profile is retained to 1 mm～2mm surplus by milling;
Described laser melting coating, by stellite laser melting coating in described laser melting coating groove, until stellite layer is to higher than final blade dimensions 0.5 mm～1.5mm;
Described correction, proofreaies and correct rear blade maximum deformation quantity and is less than 0.3mm.
Adopt after technique of the present invention, the laser melting coating deflection of turbine blade can be controlled in the reasonable scope, can prevent the requirement of proofreading and correct cracking, can guarantee blade processing dimensional accuracy, can guarantee again the cladding quality of stellite, and tool wear also can be controlled in a zone of reasonableness.
The specific embodiment
Embodiment mono-:
Use a last stage vane of steam turbine for 0Cr17Ni4Cu4Nb stainless steel material, its processing technology is as follows:
(1) base: press neck and blade pulling, the lug moulding of leaf top and integral shroud to press neck, blade pulling and boss shaping, the moulding of blade front end square billet, blade root to flatten step raw material are distributed according to blade shape by jumping-up, blade root raw material;
(2) die-forging forming: through 2 ~ 5 fire time by blank forging to approaching blade shape, the monolateral surplus 3mm of blade;
(3) heat treatment, blade forging meets the demands Blade Properties through solid solution, adjustment, aging thermal treating process successively;
(4) rough mill blank profile and milling laser melting coating groove: by milling, process blade processing to convex profile and interior arc shaped surface retained to 2mm surplus, and the milling of cladding groove size is worked in the margin of tolerance;
(5) laser melting coating, by stellite cladding in laser melting coating groove, until stellite floor height is in final blade dimensions 1mm;
(6) proofread and correct: adopt forcing press to proofread and correct blade, after proofreading and correct, rear blade maximum deformation quantity is less than 0.3mm;
(7) flaw detection: ray and penetrant inspection are carried out in the laser melting coating region to blade;
(8) repair welding: the underproof blade in cladding region is carried out to argon arc welding repair welding;
(9) destressing heat treatment: remove the residual stress that laser melting coating, correction and repair welding produce;
(10) comprehensive milling: adopt square chest location by blade blade with the fixing milling blade root of sn-bi alloy, then take square chest as benchmark by blade root dimensioned in the margin of tolerance, then milling blade, by blade processing to dimensional tolerance range;
(11) polishing: blade surface is carried out to polishing, remove processing tool marks;
(12) shot-peening: blade surface is carried out to bead, form compressive stress layer.
Embodiment bis-:
Use a last stage vane of steam turbine for 0Crl3Ni8Mo2Al stainless steel material, its processing technology is as follows:
(1) base: press neck and blade pulling, the lug moulding of leaf top and integral shroud to press the steps such as neck, blade pulling and boss shaping, the moulding of blade front end square billet, blade root flattening, blade press-bending that raw material are distributed according to blade shape by jumping-up, blade root raw material;
(2) die forging: through 2 ~ 5 fire time forgings to approaching blade shape, the monolateral surplus 4mm of blade;
(3) heat treatment: blade is carried out to solution treatment, subzero treatment successively;
(4) rough mill blank profile and milling laser melting coating groove: by milling, process blade processing to arc shaped surface in convex profile is retained to 2mm surplus; And the milling of cladding groove size is worked in the margin of tolerance
(5) laser melting coating, by stellite cladding in laser melting coating groove, until stellite cladding layer is higher than final blade dimensions 1.5mm;
(6) proofread and correct: adopt forcing press to proofread and correct, proofread and correct rear blade maximum deformation quantity and be less than 0.3mm;
(7) flaw detection: ray and penetrant inspection are carried out in laser melting coating region;
(8) repair welding: the underproof blade in cladding region is carried out to argon arc welding repair welding;
(9) destressing heat treatment: carry out Ageing Treatment and make blade reach performance requirement and remove laser melting coating, rectification, repair welding residual stress simultaneously;
(10) comprehensive milling: adopt square chest location by blade blade with the fixing milling blade root of sn-bi alloy, then take square chest as benchmark by blade root dimensioned in the margin of tolerance, then milling blade, by blade processing to dimensional tolerance range;
(11) polishing: remove processing tool marks;
(12) shot-peening: shot-peening is carried out on surface, forms compressive stress layer.
Claims (5)
1. a processing technology that adopts the turbine blade of the anti-water erosion of laser melting coating, is characterized in that: it comprises following technological process:
(1) base, presses the steps such as neck and blade pulling that raw material are distributed according to blade shape by jumping-up, blade root raw material, makes blank;
(2) die-forging forming, by described blank forging to the blade forging that approaches blade shape;
(3) heat treatment, meets the demands by being heat-treated to performance to the blade forging after described die-forging forming;
(4) rough mill blank profile and milling laser melting coating groove, by milling, process and remove certain forging surplus, and described laser melting coating groove is machined in the margin of tolerance;
(5) at described laser melting coating groove inner laser cladding stellite;
(6) proofread and correct, the blade after adopting forcing press to cladding is proofreaied and correct;
(7) flaw detection, carries out ray and penetrant inspection to stellite laser melting coating region;
(8) repair welding, carries out argon arc welding repair welding to the underproof blade in described cladding region;
(9) destressing heat treatment, removes the residual stress that laser melting coating, correction and repair welding produce;
(10) comprehensive milling, by blade processing to dimensional tolerance range;
(11) polishing, removes blade surface processing tool marks;
(12) shot-peening, carries out bead to blade surface, forms compressive stress layer.
2. a kind of processing technology that adopts the turbine blade of the anti-water erosion of laser melting coating according to claim 1, is characterized in that: described die-forging forming, and different according to blade dimensions, monolateral surplus 3mm～5mm.
3. a kind of processing technology that adopts the turbine blade of the anti-water erosion of laser melting coating according to claim 2, it is characterized in that: described in rough mill blank profile and milling laser melting coating groove, by milling, process blade processing to arc shaped surface in convex profile retained to 1mm～2mm surplus.
4. a kind of processing technology that adopts the turbine blade of the anti-water erosion of laser melting coating according to claim 3, it is characterized in that: described laser melting coating, by stellite laser melting coating in described laser melting coating groove, until stellite layer is to higher than final blade dimensions 0.5mm～1.5mm.
5. a kind of processing technology that adopts the turbine blade of the anti-water erosion of laser melting coating according to claim 4, is characterized in that: described correction, correction rear blade maximum deformation quantity is less than 0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310679221.1A CN103659201B (en) | 2013-12-15 | 2013-12-15 | A kind of processing technology adopting the turbine blade of the anti-water erosion of laser melting coating |
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| CN201310679221.1A CN103659201B (en) | 2013-12-15 | 2013-12-15 | A kind of processing technology adopting the turbine blade of the anti-water erosion of laser melting coating |
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| CN103659201A true CN103659201A (en) | 2014-03-26 |
| CN103659201B CN103659201B (en) | 2015-12-30 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104084773A (en) * | 2014-08-04 | 2014-10-08 | 南京赛达机械制造有限公司 | Machining process of axial-flow type turbine blade |
| CN104533539A (en) * | 2014-12-31 | 2015-04-22 | 无锡透平叶片有限公司 | Laser cladding structure of steam turbine blade air inlet side |
| CN105479115A (en) * | 2015-12-30 | 2016-04-13 | 无锡透平叶片有限公司 | Forming method for sliver welding plate for brazed specially-shaped Stellite alloy plate for steam turbine blade |
| CN105798556A (en) * | 2016-04-06 | 2016-07-27 | 台州市椒江永固船舶螺旋桨厂 | Propeller polishing technique |
| CN106181270A (en) * | 2016-08-26 | 2016-12-07 | 常州索拉尔熔盐泵阀科技有限公司 | The preparation method of pump for liquid salts combination type blade wheel |
| CN107378403A (en) * | 2014-05-29 | 2017-11-24 | 爱三工业株式会社 | The manufacture method of engine exhaust gas reflux valve |
| CN109514058A (en) * | 2018-11-23 | 2019-03-26 | 东方电气集团东方汽轮机有限公司 | A kind of anti-water erosion processing method of last stage vane of steam turbine |
| CN113530606A (en) * | 2021-07-12 | 2021-10-22 | 西安热工研究院有限公司 | Turbine blade water erosion treatment method |
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| US20070205189A1 (en) * | 2002-10-30 | 2007-09-06 | General Electric Company | Method of repairing a stationary shroud of a gas turbine engine using laser cladding |
| CN101186008A (en) * | 2007-12-21 | 2008-05-28 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for manufacturing non-machining leaf blade roll milling mould |
| CN102168210A (en) * | 2011-04-07 | 2011-08-31 | 杭州博华激光技术有限公司 | Laser cladding technological method and alloy material for laser cladding |
| CN103111724A (en) * | 2012-12-07 | 2013-05-22 | 无锡透平叶片有限公司 | Turbine blade laser cladding area flaw welding method |
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2013
- 2013-12-15 CN CN201310679221.1A patent/CN103659201B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070205189A1 (en) * | 2002-10-30 | 2007-09-06 | General Electric Company | Method of repairing a stationary shroud of a gas turbine engine using laser cladding |
| CN101186008A (en) * | 2007-12-21 | 2008-05-28 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for manufacturing non-machining leaf blade roll milling mould |
| CN102168210A (en) * | 2011-04-07 | 2011-08-31 | 杭州博华激光技术有限公司 | Laser cladding technological method and alloy material for laser cladding |
| CN103111724A (en) * | 2012-12-07 | 2013-05-22 | 无锡透平叶片有限公司 | Turbine blade laser cladding area flaw welding method |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107378403A (en) * | 2014-05-29 | 2017-11-24 | 爱三工业株式会社 | The manufacture method of engine exhaust gas reflux valve |
| CN107378403B (en) * | 2014-05-29 | 2019-04-02 | 爱三工业株式会社 | The manufacturing method of engine exhaust gas reflux valve |
| CN104084773A (en) * | 2014-08-04 | 2014-10-08 | 南京赛达机械制造有限公司 | Machining process of axial-flow type turbine blade |
| CN104084773B (en) * | 2014-08-04 | 2016-08-24 | 南京赛达机械制造有限公司 | A kind of processing technique of xial flow steam turbine blade |
| CN104533539A (en) * | 2014-12-31 | 2015-04-22 | 无锡透平叶片有限公司 | Laser cladding structure of steam turbine blade air inlet side |
| CN105479115A (en) * | 2015-12-30 | 2016-04-13 | 无锡透平叶片有限公司 | Forming method for sliver welding plate for brazed specially-shaped Stellite alloy plate for steam turbine blade |
| CN105798556A (en) * | 2016-04-06 | 2016-07-27 | 台州市椒江永固船舶螺旋桨厂 | Propeller polishing technique |
| CN106181270A (en) * | 2016-08-26 | 2016-12-07 | 常州索拉尔熔盐泵阀科技有限公司 | The preparation method of pump for liquid salts combination type blade wheel |
| CN106181270B (en) * | 2016-08-26 | 2018-06-08 | 常州索拉尔熔盐泵阀科技有限公司 | The preparation method of pump for liquid salts combination type blade wheel |
| CN109514058A (en) * | 2018-11-23 | 2019-03-26 | 东方电气集团东方汽轮机有限公司 | A kind of anti-water erosion processing method of last stage vane of steam turbine |
| CN113530606A (en) * | 2021-07-12 | 2021-10-22 | 西安热工研究院有限公司 | Turbine blade water erosion treatment method |
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| CN103659201B (en) | 2015-12-30 |
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