CN100434721C - Method for manufacturing anticorrosive wear-resistant titaniumalloy impeller for centrifugal blower - Google Patents
Method for manufacturing anticorrosive wear-resistant titaniumalloy impeller for centrifugal blower Download PDFInfo
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- CN100434721C CN100434721C CNB2005100177638A CN200510017763A CN100434721C CN 100434721 C CN100434721 C CN 100434721C CN B2005100177638 A CNB2005100177638 A CN B2005100177638A CN 200510017763 A CN200510017763 A CN 200510017763A CN 100434721 C CN100434721 C CN 100434721C
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Abstract
The present invention relates to a manufacture method for titanium alloy centrifugal fan impellers with corrosion resistance and abrasion resistance. The manufacture method for fan impellers is characterized in that a machine-made graphite model is adopted, and a casting for the titanium alloy fan impellers is cast from a vacuum casting furnace. The impeller casting is mechanically processed according to design requirements, and polygonal pulverized corundum with 60 to 180 meshes is firstly selected for the rough surface processing of a blade; a hot solution of the mixture of the three surfactants of 50 to 70% of basic hydroxide, 10 to 30% of chelating agent and 15 to 20% of trihydroxy benzene is used for activatng surfaces of titanium alloy impeller blades after processing; finally, WC series metal ceramic abrasive powder is sprayed at supersonic speed on the blade surfaces by a spraying method, and simultaneously, surrounding parts of the spraying blades are protected by inert gas in the process of spraying to reduce gas pollution to the titanium alloy impeller bodies.
Description
Technical field:
The present invention relates to the applied technical field of titanium-based alloy material, particularly a kind of manufacture method of anti-corrosion, abrasion-resistant titanium alloy centrifugal blower fan blade wheel.
Background technique:
Centrifugal blower fan blade wheel is that pneumatic steelmaking waste gas reclaims the core component in the blower fan apparatus, and its effect is to pump by the negative pressure of blower fan import to compile back filtration processing again, carries out waste gas and is recycled.Its working environment is: water drenches acid wet environment, the washing away of the coal gas dust hybrid particles that occurs in the convertor steelmaking process, and the dust granule degree is 40 μ m, and dust content of gas is at 150mg/l, and its main component is a dust; CO:50～80%, N
2, CO
2, SO
2: 12～19%.
Former draught fan impeller front and rear cover plate is the 35MoV material, and blade is the 15MnV material; The centrifugal blower fan blade wheel material adopts 35CrMoV, and successively adopts stainless steel, A3 steel, the 45# steel body material as impeller; Adopting plating or spraying method to carry out surface abrasion resistance handles, using effect is all not obvious, add that former steel centrifugal blower fan blade wheel manufacturing process is a welded structure, the weld joint is uneven causes reasons such as dust stratification and raw material are perishable, has comprehensively caused the draught fan impeller critical component life-span to reduce and the frequent result that rolls off the production line.
After using former draught fan impeller, impeller inlet place vane thickness is thinned to 1mm by 7mm half a year as a result, and draught fan impeller structural strength deficiency loses original dynamic equilibrium state and impeller life is shortened greatly.Impeller original material centrifugal blower fan blade wheel is the longest onlinely adhered to two months, caused that this draught fan impeller service cycle is too short, user cost high.Reason be moist sour environment with the impeller material in the react compound of generation stripped shape Fe of Fe; large particle dust granule impact high speed rotation blade surface; cause the Fe compound to come off and be deposited on the blade suction surface place; and cause the impeller outlet place to narrow down; impeller pressure side place is subjected to the erosion corrosion thing and comes off; and making the impeller blade attenuate, the corrosion of impeller blade as a result aggravates.
The rotor blade of domestic water power station large-scale water turbine overcurrent blade, thermal power station adopts steel material and corresponding with it pyrolytic coating technology at present, but the abominable sour environment of metallurgy industry and wash away environment, to adopting the above-mentioned steel material and the draught fan impeller of the wear-proof technique manufacturing of correspondence not to get a desired effect, use titanium alloy material and titanium alloy Wear-resistant Treatment technology and make the draught fan impeller critical component, also do not have bibliographical information at present both at home and abroad.
Summary of the invention:
For solve present steel draught fan impeller life-span short, the problem that the cycle is frequent, can't satisfy the pneumatic steelmaking gas recovery system rolls off the production line, the manufacture method that the purpose of this invention is to provide a kind of anti-corrosion, abrasion-resistant titanium alloy centrifugal blower fan blade wheel, improve the wear-resisting property of draught fan impeller, to improve the working life of draught fan impeller, reduce maintenance frequency, reduce maintenance expenses, increase economic efficiency.
For achieving the above object, the present invention adopts following technological scheme:
The manufacture method of described anti-corrosion, abrasion-resistant titanium alloy centrifugal blower fan blade wheel, the employing machine adds the graphite model, waters to cast out titanium alloy draught fan impeller foundry goods in the vacuum casting stove; By designing requirement the draught fan impeller foundry goods that adopts the cast molding of ZTC4 titanium alloy material Integratively is carried out machining; Then the blade surface after the processing is handled, at first selecting many ribs type 60-180 order emergy to carry out rough surface handles, adopt alkaline hydrated oxide 50-70% again, chelating agent 10-30%, trihydroxy benzene 15-20%, the hot solution of three kinds of surface active agent compositions is carried out activation processing to the surface, titanium alloy impeller blade position after processing, and makes titanium alloy impeller blade matrix surface generate the active layer of the good one deck porous of adhesion; Adopting spraying method at blade surface at last is WC that the ceramet abrasive powders carries out supersonic spray coating, will carry out inert gas shielding to position around the spraying blade simultaneously in spraying process, to reduce the pollution of gas to the titanium alloy impeller body.
The manufacture method of described anti-corrosion, abrasion-resistant titanium alloy centrifugal blower fan blade wheel, again to through the blade after the surface activation treatment, carrying out 3-6 Mach supersonic spray coating WC is ceramet; 200～380 μ m size WC that sintering is pulverized is a ceramet, its main component: WC 7～12, and Co 2～6, and Cr 1, and metal ceramic powder makes abrasive material be deposited as wear resistant coating as high-abrasive material on the impeller blade position by special-purpose spray gun.
Owing to adopted as above technological scheme, the present invention has following good effect:
The present invention has played critical effect to the operational reliability and the stability of blower fan apparatus, greatly reduce the labor intensity and the maintenance expenses of draught fan impeller maintenance process simultaneously, titanium alloy draught fan impeller critical component of the present invention is compared with existing steel draught fan impeller, and the intensity of titanium alloy, plasticity and toughness are suitable with impeller material with present blower fan.
After the titanium alloy fan impeller blade is covered and is coated with processing, coating wear resistance: weigh surface hardness HV 〉=1000 with the surface hardness index; And untreated HV=300 is more than 3 times of untreated hardness.
Supersonic spray coating WC-Co Bond Strength of Coating σ
b〉=60Mpa.
Both acid-and base-resisting environmental corrosion of titanium alloy draught fan impeller after spraying, anti-again erosion corrosion, the life-span can be improved 4～5 times.
The invention of this technology; overcome the shortcoming of original material; having solved present steel works at first adopts water to drench dedusting; this acid, alkali condition and granulate mixture have just produced acid and alkali corrosion and erosive wear problem to impeller of high-speed fan; and the online cycle of former draught fan impeller is short, and the shortcoming that rolls off the production line and stop work diminishes because impeller weight is reduced to the 256kg motor load by 421kg; save electric energy 1/3, have broad application prospects at metallurgy industry.
AI850 draught fan impeller critical component in the diameter of phi 1540 of certain steel works, once reach the standard grade by the titanium alloy draught fan impeller of above-mentioned vacuum integral casting method and the manufacturing of Wear-resistant Treatment technology and to have reached 3 months, titanium draught fan impeller thickness when 2 years of operation test have also kept designing does not need repair welding.
Embodiment:
Mode of execution one
The employing machine adds the graphite model, waters to cast out titanium alloy draught fan impeller foundry goods in the vacuum casting stove; By designing requirement impeller casting is carried out machining; To the titanium fan impeller blade after the vacuum casting, adopt the emergy pretreatment earlier, adopt alkaline hydrated oxide 50-70% then, chelating agent 10-30%, trihydroxy benzene 15-20%, the hot solution of three kinds of surface active agent compositions is carried out activation processing to the surface, titanium alloy impeller blade position after processing, and makes titanium alloy impeller blade matrix surface generate the active layer of the good one deck porous of adhesion; Again the wear-resistant material of 200 μ m sizes behind the sintering is carried out the thermal spraying of supersonic speed 3-6 Mach at blade surface, the abrasive components weight ratio is: WC 7, Co 2, Cr 0.5.
Mode of execution two
The employing machine adds the graphite model, waters to cast out titanium alloy draught fan impeller foundry goods in the vacuum casting stove; By designing requirement impeller casting is carried out machining; To the titanium fan impeller blade after the vacuum casting, adopt the emergy pretreatment earlier, adopt alkaline hydrated oxide 50-70% then, chelating agent 10-30%, trihydroxy benzene 15-20%, the hot solution of three kinds of surface active agent compositions is carried out activation processing to the surface, titanium alloy impeller blade position after processing, and makes titanium alloy impeller blade matrix surface generate the active layer of the good one deck porous of adhesion; Again the wear-resistant material of 310 μ m sizes behind the sintering is carried out the thermal spraying of supersonic speed 3-6 Mach at blade surface, the abrasive components weight ratio is: WC 8, Co 3, Cr 1.
Mode of execution three
The employing machine adds the graphite model, waters to cast out titanium alloy draught fan impeller foundry goods in the vacuum casting stove; By designing requirement impeller casting is carried out machining; To the titanium fan impeller blade after the vacuum casting, adopt the emergy pretreatment earlier, adopt alkaline hydrated oxide 50-70% then, chelating agent 10-30%, trihydroxy benzene 15-20%, the hot solution of three kinds of surface active agent compositions is carried out activation processing to the surface, titanium alloy impeller blade position after processing, and makes titanium alloy impeller blade matrix surface generate the active layer of the good one deck porous of adhesion; Again the wear-resistant material of 400 μ m sizes behind the sintering is carried out the thermal spraying of supersonic speed 3-6 Mach at blade surface, the abrasive components weight ratio is: WC 12, Co 6, Cr 1.5.
Embodiment's performance index
| Test piece number (Test pc No.) | Surface hardness (HV) | Abrasive material combination force (Mpa) |
| 1# | 1030 | 60.5 |
| 2# | 1100 | 62 |
| 3# | 1006 | 65 |
| Mean value | 1045.3 | 62.5 |
Claims (5)
1, a kind of manufacture method of anti-corrosion, abrasion-resistant titanium alloy centrifugal blower fan blade wheel is characterized in that: the manufacture method of described draught fan impeller, and the employing machine adds the graphite model, waters to cast out titanium alloy draught fan impeller foundry goods in the vacuum casting stove; By designing requirement the draught fan impeller foundry goods that adopts the cast molding of ZTC4 titanium alloy material Integratively is carried out machining; Blade surface after the processing is handled, at first selecting many ribs type 60-180 order emergy to carry out rough surface handles, adopt alkaline hydrated oxide 50-70% again, chelating agent 10-30%, trihydroxy benzene 15-20%, the hot solution of three kinds of surface active agent compositions is carried out activation processing to the surface, titanium alloy impeller blade position after processing, and makes titanium alloy impeller blade matrix surface generate the active layer of the good one deck porous of adhesion; Adopting spraying method at blade surface at last is WC that the ceramet abrasive powders carries out supersonic spray coating, will carry out inert gas shielding to position around the spraying blade simultaneously in spraying process, to reduce the pollution of gas to the titanium alloy impeller body.
2, the manufacture method of anti-corrosion, abrasion-resistant titanium alloy centrifugal blower fan blade wheel as claimed in claim 1 is characterized in that: the manufacture method of described draught fan impeller, and to through the blade after the surface activation treatment, carrying out 3-6 Mach supersonic spray coating WC is ceramet; 200～380 μ m size WC that sintering is pulverized is a ceramet, its main component weight ratio: WC 7～12, and Co 2～6, and Cr 1, and metal ceramic powder makes abrasive material be deposited as wear resistant coating as high-abrasive material on the impeller blade position by special-purpose spray gun.
3, the manufacture method of anti-corrosion, abrasion-resistant titanium alloy centrifugal blower fan blade wheel as claimed in claim 1, it is characterized in that: the manufacture method of described draught fan impeller, the wear-resistant material of 200 μ m sizes behind the sintering is carried out the thermal spraying of supersonic speed 3-6 Mach at blade surface, and the abrasive components weight ratio is: WC 7, Co 2, Cr 0.5.
4, the manufacture method of anti-corrosion, abrasion-resistant titanium alloy centrifugal blower fan blade wheel as claimed in claim 1, it is characterized in that: the manufacture method of described draught fan impeller, the wear-resistant material of 310 μ m sizes behind the sintering is carried out the thermal spraying of supersonic speed 3-6 Mach at blade surface, and the abrasive components weight ratio is: WC 8, Co 3, Cr 1.
5, the manufacture method of anti-corrosion, abrasion-resistant titanium alloy centrifugal blower fan blade wheel as claimed in claim 1, it is characterized in that: the manufacture method of described draught fan impeller, the wear-resistant material of 400 μ m sizes behind the sintering is carried out the thermal spraying of supersonic speed 3-6 Mach at blade surface, and the abrasive components weight ratio is: WC 12, Co 6, Cr 1.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100177638A CN100434721C (en) | 2005-07-05 | 2005-07-05 | Method for manufacturing anticorrosive wear-resistant titaniumalloy impeller for centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100177638A CN100434721C (en) | 2005-07-05 | 2005-07-05 | Method for manufacturing anticorrosive wear-resistant titaniumalloy impeller for centrifugal blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1710287A CN1710287A (en) | 2005-12-21 |
| CN100434721C true CN100434721C (en) | 2008-11-19 |
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| CNB2005100177638A Expired - Fee Related CN100434721C (en) | 2005-07-05 | 2005-07-05 | Method for manufacturing anticorrosive wear-resistant titaniumalloy impeller for centrifugal blower |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942628B (en) * | 2010-10-15 | 2015-01-07 | 武汉大学 | Surface wear-resistant treatment method for reamer blade of brick making machine |
| CN102678620A (en) * | 2012-05-30 | 2012-09-19 | 郭丰亮 | Wear-resisting boiler induced-draft fan impeller |
| CN102865243A (en) * | 2012-10-15 | 2013-01-09 | 江苏大学 | Abrasion-resistant heat shock resistant impeller type fluid mechanical blade and preparation method |
| CN103509974B (en) * | 2013-09-22 | 2015-05-06 | 苏州华宇精密铸造有限公司 | Manufacturing method for precisely cast titanium alloy impeller |
| CN104745873B (en) * | 2013-11-04 | 2016-07-06 | 施小斌 | A kind of method preparing aluminium-titanium alloy blade |
| CN104745871B (en) * | 2013-11-04 | 2017-03-01 | 铜山县丰华工贸有限公司 | A kind of method preparing Al-Ti alloy impeller |
| CN105347519B (en) * | 2015-11-13 | 2017-10-31 | 徐州工程学院 | Nano bubble generator and application thereof |
| CN105598655A (en) * | 2016-03-02 | 2016-05-25 | 华北水利水电大学 | Method for strengthening surface of metal turbine runner blade through combination of electric spark deposition and welding |
| CN109570451A (en) * | 2018-11-09 | 2019-04-05 | 中国船舶重工集团公司第七二五研究所 | A kind of few surplus low cost processing method for complex-curved titanium alloy blade |
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| JPS5941252A (en) * | 1982-09-02 | 1984-03-07 | 積水樹脂株式会社 | Manufacture of corrosion protective body made of metal |
| JPS63243401A (en) * | 1987-03-30 | 1988-10-11 | Mitsubishi Heavy Ind Ltd | Errosion-resisting titanium alloy blade |
| CN1594891A (en) * | 2004-07-14 | 2005-03-16 | 沈阳东方钛业有限公司 | Titanium fan |
| US20050100442A1 (en) * | 2003-10-10 | 2005-05-12 | Snecma Moteurs | Method of soldering a compressor nozzle ring of a gas turbine |
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2005
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Patent Citations (4)
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| JPS5941252A (en) * | 1982-09-02 | 1984-03-07 | 積水樹脂株式会社 | Manufacture of corrosion protective body made of metal |
| JPS63243401A (en) * | 1987-03-30 | 1988-10-11 | Mitsubishi Heavy Ind Ltd | Errosion-resisting titanium alloy blade |
| US20050100442A1 (en) * | 2003-10-10 | 2005-05-12 | Snecma Moteurs | Method of soldering a compressor nozzle ring of a gas turbine |
| CN1594891A (en) * | 2004-07-14 | 2005-03-16 | 沈阳东方钛业有限公司 | Titanium fan |
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