CN101358271A - Blade root surface strengthening method - Google Patents
Blade root surface strengthening method Download PDFInfo
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- CN101358271A CN101358271A CNA200810156033XA CN200810156033A CN101358271A CN 101358271 A CN101358271 A CN 101358271A CN A200810156033X A CNA200810156033X A CN A200810156033XA CN 200810156033 A CN200810156033 A CN 200810156033A CN 101358271 A CN101358271 A CN 101358271A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention relates to a blade and root surface strengthening method. The parts which are treated by the method and the untreated parts are naturally transited and both belong to the compressive stress state, so that the untreated parts can not generate fatigue sources and can meet the technical requirements of rolling strengthening. The method is characterized in that a surface shot blasting method is adopted to realize the blade and root surface strengthening.
Description
Technical field
The present invention relates to the surface intensified technique technical field of fan blade, be specially blade root surface strengthening method.
Background technology
Steam turbine last stage, inferior final stage, the three grades of circular arc blade root blades in end are in use, weak position is blade root carrying position, because this position will be born heavily stressed and effect repeated stress when work, very easily produce partial fatigure failure, adopt special warfare that particular processing is carried out at this position.
Treatment process originally: exactly this position is applied stress, the method that improves this position fatigue strength has finish rolling hardening, and it is a kind of chipless processing that rolling and processing is strengthened.Rolling tools by a definite form apply certain pressure to workpiece surface.Utilize plastic deformation of metal at normal temperatures, thereby make the nao-and micro relief of workpiece surface planish the purpose that reaches change surface structure, mechanical characteristics, shape and size.Therefore this method can reach polishing processing simultaneously and strengthen two kinds of purposes.But finish rolling hardening has himself unavoidable shortcoming, is embodied in: 1) will select suitable expensive roll extrusion utensil (rolling wheel, roller etc.); 2) stressed condition at roll extrusion position is a stress, but adjoining with it not roll extrusion position presents tensile stress state, and promptly stressed condition discontinuous (shown in figure two) easily produces tired defective at the position that presents tensile stress state.These all are its shortcomings that is difficult to overcome
Summary of the invention
At the problems referred to above, the invention provides blade root surface strengthening method, position and the nature transition of untreated position by this method is handled all belong to compressive stress state, can not make untreated position produce tired source and can reach the technical requirements of finish rolling hardening.
Its technical scheme is such, it is characterized in that: adopt the method for shot blasting on surface to realize the blade root surface is strengthened.
It is further characterized in that: in shot peening,
Shot-peening pressure: 0.1MPa～0.7MPa
Nozzle footpath: φ 6mm～φ 12mm
Nozzle is apart from the distance for the treatment of spray plane: 50mm～400mm
Nozzle translational speed: 30mm/min～500mm/min
Pill material: cast steel ball or steel wire cut pill
Pellet size: φ 0.2mm～φ 1.5mm
Jet flow is about 30 degree～90 degree with the surface by the angle on spray surface
Hardness 50HRC～55HRC is made and be quenched in nozzle system with T7 or T8 tool steel
Fraction of coverage: 100%～200%
A test piece arc-height: 0.08mm～0.70mm
The shot-peening residual compressive stress: the surface is not less than 500Mpa, and the residual compressive stress layer is no less than 400mm
Shot-peening face surfaceness: Rz＜16 μ m; Wt＜25 μ m;
The step of described ball blasting method is:
(1), blade is installed in the special-purpose shot-peening anchor clamps location, locking, fixing according to process program;
(2), select the nozzle of suitable bore for use, adjust spray gun and the position for the treatment of spray plane, make spray gun perpendicular to the tooth bottom surface;
(3), select diameter 0.5mm～2mm pill for use;
(4), adjust compressed air pressure at 0.15MPa～0.6MPa;
(5), before product is carried out shot-peening, earlier spray A test piece is installed to the A test piece in the special shot-peening anchor clamps, uses the processing parameter identical with the product shot-peening that shot-peening is carried out in the A test piece, verifies the shot peening strength that different shot-peening parameters obtains
(6), re-use special shot-peening anchor clamps, according to the processing parameter identical shot-peening is carried out in the A test block with the product shot-peening, the residual compressive stress state that the processing parameter shot-peening produces is determined in check;
(7), working procedure, target shot-peening district is carried out 1-3 all over the shot-peening of higher shot peening strength, shot peening strength is 0.45mmA-0.5mmA;
(8), adjust the shot-peening parameter, working procedure carries out the shot-peening of 1-2 all over low shot peening strength to target shot-peening district, shot peening strength is 0.25mmA-0.30mmA;
(9), unload and cleaning, cleaning blade to surperficial no-sundries;
(10), detect the surface coverage in shot-peening district with magnifying glass.
Adopt aforesaid method that the blade root surface is strengthened, cast steel ball, steel wire cut pill medium, by pressurized air shot-peening mode, by high speed and injected to part under a controllable state, each ball material particles hit is to part the time, just as a slight hammer, beat out a little indenture, form very thin one deck plastic deformation layer at workpiece surface like this, on the surface or the high residual compressive stress that produces of near surface offset the tensile stress of the danger of part deep layer, increase the fatigue resistance at turbine blade blade root carrying position.
Embodiment
Adopt the method for shot blasting on surface to realize the blade root surface is strengthened.
Below in conjunction with embodiment surface strengthening process of the present invention is described:
Embodiment 1
(1), blade is installed in the special-purpose shot-peening anchor clamps location, locking, fixing according to process program;
(2), to select nozzle, its bore for use be φ 6mm, adjusts spray gun and the position for the treatment of spray plane, makes spray gun perpendicular to the tooth bottom surface, nozzle is apart from the distance for the treatment of spray plane: 400mm; Nozzle translational speed: 285mm/min; Jet flow is about 60 degree with the angle that is sprayed the surface; Hardness 52.5HRC is made and be quenched in nozzle system with T7 or T8 tool steel
(3), selecting diameter for use is cast steel ball or the steel wire cut pill of 2mm;
(4), adjust compressed air pressure at 0.15MPa; Shot-peening pressure: 0.4MPa
(5), before product is carried out shot-peening, spray A test piece earlier, the arc-height of A test piece is 0.39mm; The A test piece is installed in the special shot-peening anchor clamps, use the processing parameter identical that shot-peening is carried out in the A test piece with the product shot-peening, verify the shot peening strength that different shot-peening parameters obtains, the shot-peening residual compressive stress: the surface is not less than 500Mpa, the residual compressive stress layer is no less than 400mm, shot-peening face surfaceness: Rz＜16 μ m; Wt＜25 μ m;
(6), re-use special shot-peening anchor clamps, according to the processing parameter identical shot-peening is carried out in the A test block with the product shot-peening, the residual compressive stress state that the processing parameter shot-peening produces is determined in check;
(7), working procedure, target shot-peening district is carried out the shot-peening of 1 time higher shot peening strength, shot peening strength is 0.45mmA;
(8), adjust the shot-peening parameter, working procedure carries out the shot-peening of 1 time low shot peening strength to target shot-peening district, shot peening strength is 0.30mmA;
(9), unload and cleaning, cleaning blade to surperficial no-sundries;
(10), the surface coverage with magnifying glass detection shot-peening district is 150%.
Embodiment 2
(1), blade is installed in the special-purpose shot-peening anchor clamps location, locking, fixing according to process program;
(2), to select nozzle, its bore for use be φ 9mm, adjusts spray gun and the position for the treatment of spray plane, makes spray gun perpendicular to the tooth bottom surface, nozzle is apart from the distance for the treatment of spray plane: 50mm; Nozzle translational speed: 500mm/min; Jet flow is about 90 degree with the angle that is sprayed the surface; Hardness 50HRC is made and be quenched in nozzle system with T7 or T8 tool steel
(3), selecting diameter for use is cast steel ball or the steel wire cut pill of 0.85mm;
(4), adjust compressed air pressure at 0.37MPa; Shot-peening pressure: 0.7MPa
(5), before product is carried out shot-peening, spray A test piece earlier, the arc-height of A test piece is 0.08mm; The A test piece is installed in the special shot-peening anchor clamps, use the processing parameter identical that shot-peening is carried out in the A test piece with the product shot-peening, verify the shot peening strength that different shot-peening parameters obtains, the shot-peening residual compressive stress: the surface is not less than 500Mpa, the residual compressive stress layer is no less than 400mm, shot-peening face surfaceness: Rz＜16 μ m; Wt＜25 μ m;
(6), re-use special shot-peening anchor clamps, according to the processing parameter identical shot-peening is carried out in the A test block with the product shot-peening, the residual compressive stress state that the processing parameter shot-peening produces is determined in check;
(7), working procedure, target shot-peening district is carried out the shot-peening of 3 times higher shot peening strengths, shot peening strength is 0.50mmA;
(8), adjust the shot-peening parameter, working procedure carries out the shot-peening of 2 times low shot peening strengths to target shot-peening district, shot peening strength is 0.25mmA;
(9), unload and cleaning, cleaning blade to surperficial no-sundries;
(10), the surface coverage with magnifying glass detection shot-peening district is 200%.
Embodiment 3
(1), blade is installed in the special-purpose shot-peening anchor clamps location, locking, fixing according to process program;
(2), to select nozzle, its bore for use be φ 12mm, adjusts spray gun and the position for the treatment of spray plane, makes spray gun perpendicular to the tooth bottom surface, nozzle is apart from the distance for the treatment of spray plane: 225mm; Nozzle translational speed: 30mm/min; Jet flow is about 30 degree with the angle that is sprayed the surface; Hardness 55HRC is made and be quenched in nozzle system with T7 or T8 tool steel
(3), selecting diameter for use is cast steel ball or the steel wire cut pill of 1.5mm;
(4), adjust compressed air pressure at 0.6MPa; Shot-peening pressure: 0.1MPa
(5), before product is carried out shot-peening, spray A test piece earlier, the arc-height of A test piece is 0.70mm; The A test piece is installed in the special shot-peening anchor clamps, use the processing parameter identical that shot-peening is carried out in the A test piece with the product shot-peening, verify the shot peening strength that different shot-peening parameters obtains, the shot-peening residual compressive stress: the surface is not less than 500Mpa, the residual compressive stress layer is no less than 400mm, shot-peening face surfaceness: Rz＜16 μ m; Wt＜25 μ m;
(6), re-use special shot-peening anchor clamps, according to the processing parameter identical shot-peening is carried out in the A test block with the product shot-peening, the residual compressive stress state that the processing parameter shot-peening produces is determined in check;
(7), working procedure, target shot-peening district is carried out the shot-peening of 2 times higher shot peening strengths, shot peening strength 0.475mmA;
(8), adjust the shot-peening parameter, working procedure carries out the shot-peening of 1 time low shot peening strength, shot peening strength 0.275mmA to target shot-peening district;
(9), unload and cleaning, cleaning blade to surperficial no-sundries;
(10), the surface coverage with magnifying glass detection shot-peening district is 175%.
Claims (3)
1, blade root surface strengthening method is characterized in that: adopt the method for shot blasting on surface to realize the blade root surface is strengthened.
2, according to the described blade root surface strengthening method of claim 1, it is characterized in that: in shot peening,
Shot-peening pressure: 0.1MPa～0.7MPa
Nozzle footpath: φ 6mm～φ 12mm
Nozzle is apart from the distance for the treatment of spray plane: 50mm～400mm
Nozzle translational speed: 30mm/min～500mm/min
Pill material: cast steel ball or steel wire cut pill
Pellet size: φ 0.2mm～φ 1.5mm
Jet flow is about 30 degree～90 degree with the surface by the angle on spray surface
Hardness 50HRC～55HRC is made and be quenched in nozzle system with T7 or T8 tool steel
Fraction of coverage: 100%～200%
A test piece arc-height: 0.08mm～0.70mm
The shot-peening residual compressive stress: the surface is not less than 500Mpa, and the residual compressive stress layer is no less than 400mm
Shot-peening face surfaceness: Rz＜16 μ m; Wt＜25 μ m.
3, according to the described blade root surface strengthening method of claim 1, it is characterized in that:
The step of described ball blasting method is:
(1), blade is installed in the special-purpose shot-peening anchor clamps location, locking, fixing according to process program;
(2), select the nozzle of suitable bore for use, adjust spray gun and the position for the treatment of spray plane, make spray gun perpendicular to the tooth bottom surface;
(3), select diameter 0.5mm～2mm pill for use;
(4), adjust compressed air pressure at 0.15MPa～0.6MPa;
(5), before product is carried out shot-peening, earlier spray A test piece is installed to the A test piece in the special shot-peening anchor clamps, uses the processing parameter identical with the product shot-peening that shot-peening is carried out in the A test piece, verifies the shot peening strength that different shot-peening parameters obtains
(6), re-use special shot-peening anchor clamps, according to the processing parameter identical shot-peening is carried out in the A test block with the product shot-peening, the residual compressive stress state that the processing parameter shot-peening produces is determined in check;
(7), working procedure, target shot-peening district is carried out 1-3 all over the shot-peening of higher shot peening strength, shot peening strength is 0.45mmA-0.5mmA;
(8), adjust the shot-peening parameter, working procedure carries out the shot-peening of 1-2 all over low shot peening strength to target shot-peening district, shot peening strength is 0.25mmA-0.30mmA;
(9), unload and cleaning, cleaning blade to surperficial no-sundries;
(10), detect the surface coverage in shot-peening district with magnifying glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810156033XA CN101358271A (en) | 2008-09-26 | 2008-09-26 | Blade root surface strengthening method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810156033XA CN101358271A (en) | 2008-09-26 | 2008-09-26 | Blade root surface strengthening method |
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| Publication Number | Publication Date |
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| CN101358271A true CN101358271A (en) | 2009-02-04 |
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| CNA200810156033XA Pending CN101358271A (en) | 2008-09-26 | 2008-09-26 | Blade root surface strengthening method |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927458A (en) * | 2010-07-13 | 2010-12-29 | 国电联合动力技术有限公司 | Method for treating surface of fan blade |
| EP2463392A1 (en) * | 2010-12-08 | 2012-06-13 | Fuji Kihan Co., Ltd | Instantaneous heat treatment method for metal product |
| CN102869794A (en) * | 2010-08-05 | 2013-01-09 | 新东工业株式会社 | A method for shot peening a gas carburised steel |
| CN102935582A (en) * | 2012-11-16 | 2013-02-20 | 哈尔滨汽轮机厂有限责任公司 | Processing method of large blade with tiepiece boss and bone type shroud ring structure of turbine |
| CN103114184A (en) * | 2012-12-07 | 2013-05-22 | 无锡透平叶片有限公司 | Method of improving shot blasting surface fineness of stainless steel blades |
| CN105500216A (en) * | 2016-01-20 | 2016-04-20 | 哈尔滨飞机工业集团有限责任公司 | Shot peening strengthening technique of middleware of hub of helicopter rotor system |
| CN106636589A (en) * | 2016-10-08 | 2017-05-10 | 中国航空工业集团公司北京航空制造工程研究所 | Shot peening strengthening method for controlling hollow blade deformation |
| CN107641697A (en) * | 2016-07-20 | 2018-01-30 | 株式会社日立制作所 | Bead for the tolerance that cavitates |
| CN108977640A (en) * | 2018-09-10 | 2018-12-11 | 中石化四机石油机械有限公司 | A kind of stress peening process method of fracturing pump valve chamber |
| CN110760658A (en) * | 2019-11-29 | 2020-02-07 | 中国航发中传机械有限公司 | Method for shot peening strengthening of tooth surface of spiral bevel gear |
| CN110951954A (en) * | 2019-12-25 | 2020-04-03 | 哈尔滨电气动力装备有限公司 | Surface shot blasting strengthening process method for guide vane blade of main pump of nuclear power station |
| CN111002229A (en) * | 2019-12-26 | 2020-04-14 | 中船重工龙江广瀚燃气轮机有限公司 | Processing method for strengthening surface of liquid shot blasting |
| CN111085943A (en) * | 2019-12-24 | 2020-05-01 | 中国航发哈尔滨轴承有限公司 | Device applied to bearing ring working surface and shot peening strengthening method thereof |
| CN111411209A (en) * | 2020-05-29 | 2020-07-14 | 盐城市丰实金属磨料有限公司 | Fine shot blasting strengthening technology based on micro-particle steel wire shot cutting |
| CN112322871A (en) * | 2020-11-13 | 2021-02-05 | 中国人民解放军陆军装甲兵学院 | Surface strengthening method for blade root |
| CN112936112A (en) * | 2021-04-08 | 2021-06-11 | 中国航发北京航空材料研究院 | Clamp type spray gun for shot blasting and strengthening method thereof |
-
2008
- 2008-09-26 CN CNA200810156033XA patent/CN101358271A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927458B (en) * | 2010-07-13 | 2012-08-22 | 国电联合动力技术有限公司 | Method for treating surface of fan blade |
| CN101927458A (en) * | 2010-07-13 | 2010-12-29 | 国电联合动力技术有限公司 | Method for treating surface of fan blade |
| CN102869794A (en) * | 2010-08-05 | 2013-01-09 | 新东工业株式会社 | A method for shot peening a gas carburised steel |
| EP2463392A1 (en) * | 2010-12-08 | 2012-06-13 | Fuji Kihan Co., Ltd | Instantaneous heat treatment method for metal product |
| CN102935582A (en) * | 2012-11-16 | 2013-02-20 | 哈尔滨汽轮机厂有限责任公司 | Processing method of large blade with tiepiece boss and bone type shroud ring structure of turbine |
| CN103114184A (en) * | 2012-12-07 | 2013-05-22 | 无锡透平叶片有限公司 | Method of improving shot blasting surface fineness of stainless steel blades |
| CN105500216A (en) * | 2016-01-20 | 2016-04-20 | 哈尔滨飞机工业集团有限责任公司 | Shot peening strengthening technique of middleware of hub of helicopter rotor system |
| CN105500216B (en) * | 2016-01-20 | 2017-09-12 | 哈尔滨飞机工业集团有限责任公司 | Helicopter rotor system propeller hub center piece stress peening process method |
| CN107641697A (en) * | 2016-07-20 | 2018-01-30 | 株式会社日立制作所 | Bead for the tolerance that cavitates |
| CN106636589B (en) * | 2016-10-08 | 2018-07-24 | 中国航空工业集团公司北京航空制造工程研究所 | A kind of stress peening method of control hollow blade deformation |
| CN106636589A (en) * | 2016-10-08 | 2017-05-10 | 中国航空工业集团公司北京航空制造工程研究所 | Shot peening strengthening method for controlling hollow blade deformation |
| CN108977640A (en) * | 2018-09-10 | 2018-12-11 | 中石化四机石油机械有限公司 | A kind of stress peening process method of fracturing pump valve chamber |
| CN110760658A (en) * | 2019-11-29 | 2020-02-07 | 中国航发中传机械有限公司 | Method for shot peening strengthening of tooth surface of spiral bevel gear |
| CN110760658B (en) * | 2019-11-29 | 2021-09-17 | 中国航发中传机械有限公司 | Method for shot peening strengthening of tooth surface of spiral bevel gear |
| CN111085943A (en) * | 2019-12-24 | 2020-05-01 | 中国航发哈尔滨轴承有限公司 | Device applied to bearing ring working surface and shot peening strengthening method thereof |
| CN111085943B (en) * | 2019-12-24 | 2022-04-19 | 中国航发哈尔滨轴承有限公司 | Device applied to bearing ring working surface and shot peening strengthening method thereof |
| CN110951954A (en) * | 2019-12-25 | 2020-04-03 | 哈尔滨电气动力装备有限公司 | Surface shot blasting strengthening process method for guide vane blade of main pump of nuclear power station |
| CN111002229A (en) * | 2019-12-26 | 2020-04-14 | 中船重工龙江广瀚燃气轮机有限公司 | Processing method for strengthening surface of liquid shot blasting |
| CN111411209A (en) * | 2020-05-29 | 2020-07-14 | 盐城市丰实金属磨料有限公司 | Fine shot blasting strengthening technology based on micro-particle steel wire shot cutting |
| CN112322871A (en) * | 2020-11-13 | 2021-02-05 | 中国人民解放军陆军装甲兵学院 | Surface strengthening method for blade root |
| CN112936112A (en) * | 2021-04-08 | 2021-06-11 | 中国航发北京航空材料研究院 | Clamp type spray gun for shot blasting and strengthening method thereof |
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