CN101058862A - Booster turbine and method of manufacturing the same - Google Patents
Booster turbine and method of manufacturing the same Download PDFInfo
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- CN101058862A CN101058862A CN 200710014794 CN200710014794A CN101058862A CN 101058862 A CN101058862 A CN 101058862A CN 200710014794 CN200710014794 CN 200710014794 CN 200710014794 A CN200710014794 A CN 200710014794A CN 101058862 A CN101058862 A CN 101058862A
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Abstract
The invention discloses a booster turbo, which is composed of ceramic material and sintered body, wherein the sintered body contains 50-70% ZrO2,10-20% TiAl,10-20% Al2O3,3-8% Ti and 3-8% Al. The ceramic material is used on the booster turbo with good compactibility, which reduces deforming quantity to produce the accumulated carbon under high temperature, high pressure and high speed in the inert gas, in order to replace alloy booster turbo. The making method of the booster turbo comprises the following steps: blending; grinding; graining; moulding; sintering. The method is simple and convenient with less investment, which is beneficial to do industrial scale of manufacturing.
Description
Technical field
The present invention relates to the booster turbine technical field, relate in particular to the material of booster turbine, the invention still further relates to the manufacture method of this booster turbine.
Background technology
Turbo-supercharger is actually a kind of air compressor, increases air input by pressurized air.The waste gas inertia impulsive force that utilizes engine to discharge promotes the turbine in the turbine room, and turbine drives co-axial impeller again, and impeller is the air sent here by the air filter pipeline of force feed again, makes it supercharging and enters cylinder.When motor speed speeds, the waste gas velocity of discharge and secondary speed also speed synchronously, and impeller compression more air enters cylinder, and the pressure of air and density increase the more fuel that can burn, the rotating speed of corresponding increase fuel quantity and adjustment engine, thereby the output rating of increase engine.
Turbo-supercharger is installed on the intake and exhaust manifold of engine, is in high temperature, under high pressure and the working condition that runs up, and its Working environment very severe, job requirement is relatively harsher, therefore all requires very high to forming materials technology and the processing technology of making.Require material that the good high-temperature mechanical property is arranged, the higher creep rupture strength limit and good antifatigue and creep resisting performance be arranged.
Booster turbine is very key and an important components on the supercharging blower, development along with the supercharging blower technology, turbine material is also being brought in constant renewal in the replacement, in the past, the material that the diesel pressure booster turbine generally adopts is 20Cr3MoWV (A), but this material is only applicable to the relatively large supercharging blower of low speed (about 40000r/min), and is more and more higher along with the rotating speed of supercharging blower, volume is more and more littler, what the diesel exhaust gas temperature had reaches more than 750 ℃, and this material can not satisfy the service requirements of supercharging blower.At present, general automobile generally adopts the K418 nickel base superalloy with booster turbine.
But the booster turbine that the K418 nickel base superalloy is made has very big limitation:
1) because a particular job environment of booster turbine requires its high temperature resistant, high pressure, generally work being not less than under 750 ℃ the operating mode, through regular meeting metamorphism appears for high rotating speed (small-sized supercharging blower reaches as high as 250000r/min) turbine blade.
2) when high temperature, high speed, inefficacy often appears flying to split in turbine blade.
3) turbine weight is big, and responsiveness is bad, the inertia effect of impeller to throttle when rapid reacting condition slow, " response lags behind " appears in turbine, the automobile speed-raising is slow, the speed-raising smoke intensity is big.
4) metal material such as Ni-based K418 alloy surface often becomes the piece carbon distribution, and in the transient equilibrium unstability down that running up, in addition, the small carbon piece high-speed impact turbine blade under high running speed that splits away off lost efficacy leaf destruction.
Summary of the invention
Technical problem to be solved by this invention is: a kind of booster turbine is provided, and this booster turbine correspondence is good, and under high temperature, high pressure and high speed situation, deflection is little and seldom produce carbon distribution.
Another technical problem to be solved by this invention is: a kind of manufacture method of booster turbine is provided, and this method can obtain the booster turbine that is made of stupalith by simple steps.
For solving the problems of the technologies described above, technical scheme of the present invention is: booster turbine, constitute by the sintered compact of stupalith, and described sintered compact is grouped into by the one-tenth of following weight ratio,
ZrO
2 50～70％，
TiAl 10～20％，
Al
2O
3 10～20％，
Ti 3～8％，
Al 3～8％。
For solving above-mentioned second technical problem, technical scheme of the present invention is: the manufacture method of booster turbine, may further comprise the steps,
By weight the ZrO that takes by weighing 50～70% respectively
2Powder, 10～20% TiAl powder, 10～20% Al
2O
3Powder, 3～8% Ti powder and 3～8% Al powder constitute raw material;
Described raw material is mixed and grind, and carry out drying treatment, obtain mixed powder;
In mixed powder, add fluidizer and mix, make and be easy to the mobile granule;
Described was displayed 20 ~ 30 hours;
Add binding agent in the granule after described displaying and mix, make pasty slurry, then it is expelled to extrusion forming in the mould, obtain to have the fine and close blank of desired shape;
Described blank is put into sintering oven carry out sintering, earlier with extracting vacuum in the sintering oven, sintering temperature is 1600 ℃ ~ 1800 ℃ before the sintering, and soaking time is 1 ~ 3 hour.
As a kind of improvement, described sintering step carries out under the nitrogen atmosphere of 1 ~ 5Mpa.
After having adopted technique scheme, the invention has the beneficial effects as follows: by disclosed method, can produce the booster turbine that constitutes by stupalith, it is different with the technology of alloy casting moulding, be to make blank by the injection die mould earlier, and then blank carried out sintering, become hard polycrystalline sintered compact at last with fibrous texture.Raw material is through after mixing and grinding, and can make various compositions in the raw material with littler particle diameter uniform distribution, thereby helps the quality of sintered compact; Mixed powder is added fluidizer make granule, granule is easy to flow, when the injection die mould, not only help improving the consistence of blank density and density distribution, and because the tamped density of granule improves, and voidage is lower, the pine dress is than reducing during die mould, compression ratio increases, and the die shape size is reduced.
Because the main component of this sintered compact is ZrO
2, it is a kind of stupalith, thereby sintered compact has that hardness is big, intensity is high, high temperature resistant, characteristic such as thermal conductivity is high and the coefficient of expansion is low.TiAl is a kind of intermetallic alloy, and it is low that it has density, specific tenacity, specific rigidity height and excellent high-temperature performance, and it can alleviate the weight of ceramic body, improves specific tenacity and specific rigidity, and effectively improves the toughness and the plasticity-of sintered compact.Ti and Al are all refractory metal, in sintering process, and it and TiAl and Al
2O
3Can improve the fragility of ceramic body together.
The booster turbine that uses present method to make, under the identical situation of volume, weight only is 1/3 of Ni-based K418 alloy booster turbine, the rotator inertia square reduces thereupon, thereby has shortened the time of response greatly, has improved correspondence; Under high temperature, high pressure and high speed situation, be not easy distortion to occur and fly to split failure phenomenon, surface smoothness is good, not carbon distribution.
Embodiment
Following examples are to further specify of the present invention, and it should not be understood as that limitation of the present invention.
Embodiment 1
1) batching
Take by weighing 50 parts of ZrO by weight respectively
2Powder, 20 parts of TiAl powder, 20 parts of Al
2O
3Powder, 5 parts of Ti powder and 5 parts of Al powder constitute raw material;
2) batch mixing and grinding
Described raw material is mixed and grind, obtain mixed powder.Described mixing and grinding steps carry out in planetary-type grinding machine.
Ball milling is the employed basic skills of mineral processing ceramic technology, and mainly acting as of it reduces size of particles, and solid alloyization is mixed or fusion and change ionic shape.Planetary-type grinding machine is made up of ball grinder, fangs, rotating disk, fixed pulley and electric motor etc.Principle of work is: planetary-type grinding machine is equipped with 4 ball grinders on rotating disk, and when dial rotation, ball grinder is made planetary motion with rotating disk around same axle center, the blank that abrasive material grinds in high-speed motion and mixing is polished in jar.Performance characteristics: 1. feed size: about 18 orders; Discharging-material size: 2. the ball grinder rotating speed is fast less than 200 orders, and the grinding efficiency height is compact construction 3., and is easy to operate, the sealing sampling, and safe and reliable, noise is low, and is pollution-free, lossless.Certainly, described raw material is mixed and grind and also can adopt the known miscellaneous equipment of field of ceramic processing to carry out.
With ball, raw material and the alcohol mixed by 2: 1: 1 (weight ratio), under high speed rotating (200r/min), mixing gets final product through half hour.Because ZrO
2The amount of powder is bigger, and the amount of other raw material is smaller, so when beginning, should be earlier with ZrO
2Powder is poured in the ball grinder of ball mill, and then other raw material is added in the described ball grinder.Like this, when mixing, other raw material is sticked on the tank skin less as far as possible, reduce loss.
3) drying
The material that mill is good is placed in the pallet, and lay is even, is placed in the drying baker oven dry about temperature adjustment to 60 ℃ then, thereby obtains mixed powder, because the volatile Gu Men of alcohol will open wide.
4) granulation
Mixed powder is put into mortar, adding concentration by 7% the weight ratio that is equivalent to mixed powder is that 20% polyvinyl alcohol water solution is as fluidizer, slowly stir, make bead, in 40 purpose sieves, sieve, to tail over and deposit, not granulated continuation is stirred, so repeatedly, and to whole granulating, be preferably grain of rice state, become normal distribution.
Granulation is to add certain fluidizer in mixed powder, after mixing, relies on the adhesive aggregation effect of fluidizer, makes the granule that granularity is thick, have certain false grain composition, good fluidity, is beneficial to the compression moulding of blank.Granularity should be tried one's best carefully, but can not be too thin, because granularity is thin more, particle is light more, and flowability is poor more; Simultaneously the specific area of powder is bigger, and the volume that accounts for is also big, thereby can not fill model uniformly during moulding, is easy to generate hole, reduces density.Granularity is generally about 0.3 ~ 0.8mm.Granule then good fluidity, the dress mould is convenient, is evenly distributed, the pine dress is than reducing when the injection die mould, the compression ratio increase helps the filling mold cavity.
In order to raise the efficiency, also can adopt the pressurization comminution granulation, be about to mixed powder and add fluidizer, mix in advance, cross 20 mesh sieves, on hydropress about 1 minute then with the pressure pressurize of 18 ~ 25MPa, be pressed into cake, broken cross behind 20 mesh sieves granule.
Also can adopt the spray drying granulation method, the powder that is about to be mixed with an amount of fluidizer is made form slurry in advance, sprays into atomizer that prilling tower atomizes and warm air drying again, and the particle that comes out is spherical preferably of flowability.
5) stewing material
Described granule was displayed 24 hours, and psychromatic ratio is more even like this.
6) die mould
By paraffin: the weight ratio of raw material=1: 5 takes by weighing paraffin, makes it to mix with raw material, stirs into starchiness; Described slurry is expelled to extrusion forming in the mould, obtains to have the fine and close blank of desired shape; Forming pressure is 160MPa, and the dwell time is 5 minutes.Paraffin is as a kind of binding agent, and its main effect is a rheological property raw materials used when improving die mould.
7) sintering
Described blank is put into vacuum sintering furnace carry out sintering, the sintering route is: room temperature → 550 ℃, 250 ℃/hour of heat-up rates, insulation 0.5h; 550 ℃ → 1600 ℃ → 1600 ℃, 150 ℃/hour of heat-up rates, insulation 1h.
Sintering is the ceramic blank densification process at high temperature and the general name of phenomenon.Along with the rising of temperature and the prolongation of time, the mutual key of solid particulate connects, grain growth, and pore and crystal boundary gradually reduce, by the transmission of material, its volumetric shrinkage, density increases, and becomes the hard polycrystalline sintered compact with fibrous texture at last.
Because high-purity zirconia is weightless increasing when high temperature, is difficult to densified sintering product, and decomposition temperature is about 1900 ℃, if decomposition reaction takes place, the superiority of material can't be accomplished.In order to stop zirconium white to decompose, improve sintered density, preferably feed the nitrogen protection atmosphere of 1Mpa.
By the booster turbine that aforesaid method obtains, its various performance index see Table 2 and table 3.
Embodiment 2
Substantially the same manner as Example 1, its difference is:
During batching, constitute the proportioning difference of each component of raw material, see Table 1;
During granulation, adding concentration by 5% the weight ratio that is equivalent to mixed powder is that 20% polyvinyl alcohol water solution is as fluidizer;
When boiling in a covered pot over a slow fire material, described was displayed 22 hours;
During die mould, forming pressure is 170MPa, and the dwell time is 5 minutes;
During sintering, the sintering route is: 550 ℃ → 1650 ℃ → 1650 ℃, and 160 ℃/hour of heat-up rates, insulation 2h; Nitrogen atmosphere 2Mpa.
The performance perameter of booster turbine sees Table 2 and table 3 behind the sintering.
Embodiment 3
Substantially the same manner as Example 1, its difference is,
During batching, constitute the proportioning difference of each component of raw material, see Table 1;
During granulation, adding concentration by 10% the weight ratio that is equivalent to mixed powder is that 20% polyvinyl alcohol water solution is as fluidizer;
When boiling in a covered pot over a slow fire material, described was displayed 16 hours;
During die mould, forming pressure is 190MPa, and the dwell time is 6 minutes;
During sintering, the sintering route is: 550 ℃ → 1700 ℃ → 1700 ℃, and 170 ℃/hour of heat-up rates, insulation 2h; Nitrogen atmosphere 2Mpa.
The performance perameter of booster turbine sees Table 2 and table 3 behind the sintering.
Embodiment 4
Substantially the same manner as Example 1, its difference is:
During batching, constitute the proportioning difference of each component of raw material, see Table 1;
During granulation, add wilkinite as fluidizer;
When boiling in a covered pot over a slow fire material, described was displayed 20 hours;
During die mould, forming pressure is 210MPa, and the dwell time is 8 minutes;
During sintering, the sintering route is: 550 ℃ → 1600 ℃ → 1600 ℃, and 150 ℃/hour of heat-up rates, insulation 2h; Nitrogen atmosphere 2Mpa.
The performance perameter of booster turbine sees Table 2 and table 3 behind the sintering.
Embodiment 5
Substantially the same manner as Example 1, its difference is:
During batching, constitute the proportioning difference of each component of raw material, see Table 1;
During granulation, add kaolin and carboxymethyl cellulose as fluidizer;
When boiling in a covered pot over a slow fire material, described was displayed 16 hours;
During die mould, forming pressure is 230MPa, and the dwell time is 10 minutes;
During sintering, the sintering route is: 550 ℃ → 1800 ℃ → 1800 ℃, and 180 ℃/hour of heat-up rates, insulation 2h; Argon gas atmosphere 3Mpa.
The performance perameter of booster turbine sees Table 2 and table 3 behind the sintering.
Embodiment 6
Substantially the same manner as Example 1, its difference is:
During batching, constitute the proportioning difference of each component of raw material, see Table 1;
During granulation, add the basic Mierocrystalline cellulose of hydroxyl as fluidizer;
When boiling in a covered pot over a slow fire material, described was displayed 12 hours;
During die mould, adopt polyvinyl alcohol to make binding agent, forming pressure is 250MPa, and the dwell time is 12 minutes;
During sintering, the sintering route is: 550 ℃ → 1600 ℃ → 1600 ℃, and 150 ℃/hour of heat-up rates, insulation 2h; Argon gas atmosphere 2Mpa.
The performance perameter of booster turbine sees Table 2 and table 3 behind the sintering.
Table 1 is each embodiment proportion of raw materials.
Table 2 is the booster turbine that obtains of each embodiment and the over-all properties parameter synopsis of K418 material booster turbine.
Table 3 is the booster turbine that obtains of each embodiment and the mechanical property parameters synopsis of K418 material booster turbine.
Table 1
| Numbering | ZrO 2Weight part | The TiAl weight part | Al 2O 3Weight part | The Ti weight part | The Al weight part |
| Embodiment 1 embodiment 2 embodiment 3 embodiment 4 embodiment 5 embodiment 6 | 50 55 60 65 70 75 | 20 15 15 10 10 7 | 20 15 15 10 10 10 | 5 5 5 7 3 5 | 5 5 5 8 7 3 |
Table 2
| Numbering | Volume density g/cm 3 | Thermal expansivity * 10 -6/℃ | Thermal conductivity W/ (m.K) |
| Embodiment 1 embodiment 2 embodiment 3 embodiment 4 embodiment 5 embodiment 6 K418 | 3.4 3.2 3.2 3.1 2.95 2.8 8.9 | 3.1 3.2 3.2 3.2 3.3 3.4 14.4 | 24 25 25 26 26.5 27 15.89 |
Table 3
| Numbering | Ultimate compression strength MPa | Bending strength MPa | Fracture toughness property MPam 1/2 | Hardness HR | Shrinking percentage % |
| Embodiment 1 embodiment 2 embodiment 3 embodiment 4 embodiment 5 embodiment 6 K418 | 3200 3600 3450 3280 4080 3950 -- | 709 821 969 943 1200 971 -- | 7.5 6.7 6.5 7.8 9.6 7.5 1.4~2.7 | 87 88 90 86 88 85 36～37 | 10 12 16 8 6 7 6.0 |
In sum, by disclosed manufacture method, can produce a kind of booster turbine of stupalith, because this stupalith not only has toughness well, high intensity, price is low, and proportion is little, also toughness reinforcing by metallics, further improved material fracture toughness property, reduced porosity, reduced linear expansivity, so correspondence is good, under high temperature, high pressure and high speed situation, be not easy distortion to occur and fly to split failure phenomenon, surface smoothness is good, not carbon distribution.The production technique that adopts is easy, and less investment helps commercial scale production.
Claims (8)
1, booster turbine is characterized in that: the sintered compact by stupalith constitutes, and described sintered compact is grouped into by the one-tenth of following weight ratio,
ZrO
2 50～70％，
TiAl 10～20％，
Al
2O
3 10～20％，
Ti 3～8％，
Al 3～8％。
2, the manufacture method of booster turbine is characterized in that: may further comprise the steps,
By weight the ZrO that takes by weighing 50～70% respectively
2Powder, 10～20% TiAl powder, 10～20% Al
2O
3Powder, 3～8% Ti powder and 3～8% Al powder constitute raw material;
Described raw material is mixed and grind, and carry out drying treatment, obtain mixed powder;
In mixed powder, add fluidizer and mix, make and be easy to the mobile granule;
Described was displayed 20 ~ 30 hours;
Add binding agent in the granule after described displaying and mix, make pasty slurry, then it is expelled to extrusion forming in the mould, obtain to have the fine and close blank of desired shape;
Described blank is put into sintering oven carry out sintering, earlier with extracting vacuum in the sintering oven, sintering temperature is 1600 ℃ ~ 1800 ℃ before the sintering, and soaking time is 1 ~ 3 hour.
3, the manufacture method of booster turbine as claimed in claim 2 is characterized in that: described mixing and grinding steps carry out in ball mill.
4, the manufacture method of booster turbine as claimed in claim 2 is characterized in that: in described granulation step, described fluidizer is the mixture of the basic Mierocrystalline cellulose of polyvinyl alcohol water solution, wilkinite, hydroxyl or kaolin and carboxymethyl cellulose.
5, the manufacture method of booster turbine as claimed in claim 4 is characterized in that: in described granulation step, described granularity is 0.3 ~ 0.8mm.
6, the manufacture method of booster turbine as claimed in claim 2 is characterized in that: in described die mould step, described binding agent is paraffin or polyvinyl alcohol.
7, the manufacture method of booster turbine as claimed in claim 6 is characterized in that: in described die mould step, forming pressure is 160 ~ 250MPa, and the dwell time is 5 ~ 12 minutes.
8, the manufacture method of booster turbine as claimed in claim 2 is characterized in that: described sintering step carries out under the nitrogen atmosphere of 1 ~ 5Mpa or argon gas atmosphere.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618743A (en) * | 2011-01-28 | 2012-08-01 | 北京有色金属研究总院 | Additive for aluminum alloy melting |
| CN104226978A (en) * | 2014-05-26 | 2014-12-24 | 上海瑞钼特金属新材料有限公司 | Application of polyvinyl alcohol water solution in metal powder metallurgy forming |
| CN105149601A (en) * | 2015-09-29 | 2015-12-16 | 四川有色金源粉冶材料有限公司 | Manufacturing method for high-gravity alloy feed |
| CN105274392A (en) * | 2015-10-26 | 2016-01-27 | 鲁东大学 | Method for manufacturing turbine blade of automobile turbocharger |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2619832B2 (en) * | 1988-06-06 | 1997-06-11 | 鐘紡株式会社 | Aluminum titanate ceramics and method for producing the same |
| CN1057826A (en) * | 1990-07-05 | 1992-01-15 | 清华大学 | Silicon nitride-based composite ceramic and piston head thereof |
| JPH10108594A (en) * | 1996-10-07 | 1998-04-28 | Mitsubishi Materials Corp | Spool ring for reel |
| CN1175950C (en) * | 2002-09-03 | 2004-11-17 | 山东大学 | Intermetallic Fe-Al compound/zirconia ceramic composite material and its prepn process |
| CN1418848A (en) * | 2002-12-25 | 2003-05-21 | 天津大学 | Heterogeneous ceramic material containing silicon phase quatermary system zicronium oxide |
| CN1289704C (en) * | 2005-03-02 | 2006-12-13 | 山东大学 | Titanium carbide base ternary composite material and its preparing method |
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2007
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618743A (en) * | 2011-01-28 | 2012-08-01 | 北京有色金属研究总院 | Additive for aluminum alloy melting |
| CN104226978A (en) * | 2014-05-26 | 2014-12-24 | 上海瑞钼特金属新材料有限公司 | Application of polyvinyl alcohol water solution in metal powder metallurgy forming |
| CN104226978B (en) * | 2014-05-26 | 2016-08-17 | 上海瑞钼特金属新材料有限公司 | The application in metal powder metallurgy molding of a kind of polyvinyl alcohol water solution |
| CN105149601A (en) * | 2015-09-29 | 2015-12-16 | 四川有色金源粉冶材料有限公司 | Manufacturing method for high-gravity alloy feed |
| CN105274392A (en) * | 2015-10-26 | 2016-01-27 | 鲁东大学 | Method for manufacturing turbine blade of automobile turbocharger |
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Assignee: Shandong Fuyuan Power Equipment Co.,Ltd. Assignor: Weifang Fuyuan Turbochargers Co., Ltd. Contract record no.: 2010990001023 Denomination of invention: Booster turbine and method of manufacturing the same Granted publication date: 20090107 License type: Exclusive License Open date: 20071024 Record date: 20101230 |