CN107524474A - A kind of anti-water erosion turbine blade - Google Patents
A kind of anti-water erosion turbine blade Download PDFInfo
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- CN107524474A CN107524474A CN201710928924.1A CN201710928924A CN107524474A CN 107524474 A CN107524474 A CN 107524474A CN 201710928924 A CN201710928924 A CN 201710928924A CN 107524474 A CN107524474 A CN 107524474A
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- wet sump
- water erosion
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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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/02—Etching
- C25F3/06—Etching of iron or steel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/147—Construction, i.e. structural features, e.g. of weight-saving hollow blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
- F01D5/286—Particular treatment of blades, e.g. to increase durability or resistance against corrosion or erosion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
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Abstract
The invention discloses a kind of anti-water erosion turbine blade, including blade root, blade profile and integral shroud, the blade root, blade profile, integral shroud is sequentially connected, the blade profile includes leading edge, inner arc, trailing edge and outer arc, air slot is provided with the blade profile and except wet sump, one end of the air slot is located at leading edge, the air slot is by leading edge towards trailing edge, the junction for being located at blade profile and integral shroud except wet sump one end, the wet sump that removes is close to trailing edge, it is described except wet sump by integral shroud towards blade root, the remote end of the air slot connects with the end except wet sump, correspond on the integral shroud except the position of wet sump end offers through hole.Anti- water erosion turbine blade provided by the invention, water droplet caused by high-temperature steam liquefaction are thrown out of from the through hole on integral shroud along except wet sump, prevent water droplet from making blade by water droplet erosion in blade profile for a long time.
Description
Technical field
The present invention relates to generating equipment technical field, more particularly to a kind of anti-water erosion turbine blade.
Background technology
Steam turbine is the rotary power machinery as mechanical work, also known as steam turbine, master by the energy conversion of steam
To be used as prime mover of generating, can also directly drive various pumps, blower fan, compressor and propeller for vessels etc., can also utilize
The steam discharge of steam turbine or intermediate extraction meet production and heat supply needs in life.
Turbine blade is a kind of revolving fluid dynamic machinery, and it directly plays the thermal energy by steam or combustion gas
For the effect of mechanical energy, and blade is steam turbine " heart ", is part particularly important in steam turbine.Steam turbine is working
When, the vapor action of HTHP is on blade, and high-temperature steam runs into coldblade and liquefaction occurs and produces water droplet, and the time comes into leaves
Piece has influence on the service life of blade easily by water droplet erosion.
The content of the invention
The technical problem to be solved by the invention is to provide a kind of anti-water erosion turbine blade, high-temperature steam liquefaction produces
Water droplet along except wet sump, be thrown out of from the through hole on integral shroud, prevent water droplet from blade is rushed by water droplet in blade profile for a long time
Erosion.
In order to solve the above technical problems, technical scheme is as follows：
A kind of anti-water erosion turbine blade, including blade root, blade profile and integral shroud, the blade root, blade profile, integral shroud are sequentially connected, described
Blade profile includes leading edge, inner arc, trailing edge and outer arc, air slot is provided with the blade profile and except wet sump, the air slot
One end is located at leading edge, and the air slot is by leading edge towards trailing edge, the company that blade profile and integral shroud are located at except wet sump one end
Place is met, described except wet sump is close to trailing edge, described to remove wet sump by integral shroud towards blade root, the remote end of the air slot is with dehumidifying
The end of groove connects, and corresponds on the integral shroud except the position of wet sump end offers through hole.
Further, the air slot is at least provided with two, and the air slot is each parallel to trailing edge.
Further, the width of the air slot becomes narrow gradually from leading edge to trailing edge.
Further, the middle and upper part of the blade profile is provided with lacing hole.
Further, the blade root is multifork root.
Further, the mass percent of the chemical composition of the anti-water erosion turbine blade is：C：0.15-0.26%,
Si：0.19-0.32%, Ni：0.65-0.69%, Cr：3.5-4.6%, Mo：0.69-0.76%, V：0.11-0.18%, W：
0.56-0.59%, Ti：5.3-5.8%, Nb：0.34-0.49%, Al：4.8-5.2%, Cu：0.08-0.14%, Ce：0.01-
0.03%th, Nd：0.02-0.03%, Dy：0.01-0.02%, surplus Fe.
Further, the mass percent of the chemical composition of the anti-water erosion turbine blade is：C：0.21%th, Si：
0.26%th, Ni：0.67%th, Cr：4.1%th, Mo：0.73%th, V：0.15%th, W：0.57%th, Ti：5.6%th, Nb：0.42%th, Al：
5.0%th, Cu：0.11%th, Ce：0.02%th, Nd：0.02%th, Dy：0.02%th, Fe：82.12%.
Present invention also offers a kind of preparation method of anti-water erosion turbine blade, comprise the following steps：
S1：The mass percent of each composition in predetermined anti-water erosion turbine blade raw material is added raw materials into smelting furnace, will
The temperature of smelting furnace is adjusted to 1500-1550 DEG C, after raw material thawing, is sufficiently stirred, raw material is smelted into alloy solution；
S2：Alloy solution is cooled to 670-650 DEG C by way of water cooling, forms alloy, then will by way of air cooling
Alloy is cooled to room temperature；
S3：Alloy is placed again into smelting furnace, the temperature of smelting furnace is adjusted to 1600-1650 DEG C, makes alloy melting again
Into alloy solution, alloy solution is cooled to 850-865 DEG C by way of water cooling, refining agent is then added and carries out refining and remove
Slag, refining time 5-10 minutes；
S4：Alloy solution after slagging-off is heated to 900-920 DEG C, then alloy solution is poured into mold and poured into a mould, is obtained
To blade embryo material；
S5：Blade embryo material is put into glowing furnace and carries out Quenching Treatment, the medium of quenching is mineral oil, hardening heat 820-
845 DEG C, 280-300 DEG C is cooled to after quenching, then blade embryo material is put into tempering furnace, furnace temperature is adjusted into 725 DEG C is returned
Fire processing, tempering time is 30-35 minutes, and room temperature is cooled to after tempering, blade embryo material is put into tempering furnace again afterwards, by stove
Temperature is adjusted to 650 DEG C, carries out double tempering, tempering time is 35-40 minutes, is cooled to room temperature after tempering again；
S6：Electrolyzed Processing is carried out to blade embryo material, blade embryo material is connect to the positive pole of dc source, tool-electrode connects the negative of power supply
Pole, blade embryo material is placed in electrolyte, 0.1-0.8mm gap is kept between two-stage, the electricity with 0.5-2.5MPa pressure
Solution liquid flows through from the gap high speed of two interpolars, when machining tool negative electrode is constantly fed to blade semi-finished product, in face of processing
In the blade surface of semi-finished of instrument, the metal material of blade semi-finished product can constantly be dissolved by the shape in cathode type face, electrolysis production
Thing is walked by high speed electrolytic liquid band, so that forming wind guide tank on blade semi-finished product and except wet sump, obtains formed blades；
S7：Polished at the outer arc of formed blades leading edge top, then cleaned with ethanol, silver soldering piece is placed on polishing
Locate, then the stellite after high-ranking officers' shape covers, and is heated by hand with oxy-acetylene flame, carries out soldering to stellite, will take charge of
Too vertical alloy is welded securely；
S8：The formed blades that are obtained to S7 continue ultrasonic examination processing, then obtained after cleaning, antirust treatment blade into
Product.
Further, the temperature control of soldering is at 650-720 DEG C in the S7, high temperature hold time up to 35 seconds.
The beneficial effects of the invention are as follows：
(1) a kind of anti-water erosion turbine blade of the present invention, the position close to trailing edge in blade profile are provided with except wet sump,
When steam turbine works, turbine blade rotates at a high speed, and water droplet is along except wet sump caused by high-temperature steam liquefaction, from integral shroud
Through hole is thrown out of, and prevents water droplet from making blade by water droplet erosion in blade profile for a long time；Air slot is additionally provided with blade profile, will
The high steam for being applied to blade is converged by air slot, is acted on trailing edge, greatly increases the active force of steam, steam
Utilization rate improves 20-25%, improves the operating efficiency of steam turbine；The remote end of air slot connects with the end except wet sump
Logical, air slot can also converge to caused water droplet except in wet sump, by being discharged except wet sump, further increasing removing for blade
Wet performance, blade is efficiently avoid by water droplet erosion, improve the service life of turbine blade；
(2) a kind of anti-water erosion turbine blade of the present invention, the width of air slot become narrow gradually from leading edge to trailing edge,
The scattered high steam being applied on blade is converged on a little, further increases the utilization rate of steam；In blade profile
Top is provided with lacing hole, and lacing wire passes through lacing hole, and turbine blade is combined into an entirety, avoids single turbine blade
Vibrated by high steam effect, and have influence on the service life of turbine blade；
(3) a kind of anti-water erosion turbine blade of the present invention, blade root are multifork root, are only needed multifork root during installation
It is inserted into the groove on impeller, installation or removal are quite convenient to quick；Multifork root and the slotted eye to match on impeller are tight
Close fit, during work, it is heated and produces expansion, blade is connected more stable with impeller；
(4) a kind of anti-water erosion turbine blade of the present invention, C and W is added in the feed, carbonization can be formed in melting
Tungsten, the hardness and wearability of turbine blade can be improved, add the intensified elements such as Mo, Ni, improve the anti-of turbine blade
Performance of shaking and corrosion resistance, V element is added, the intensity of steel and toughness with crystal grain thinning, can be made to improve 15-20%, also added
Enter Ce, Nd, Dy, the reaction such as these rare earth elements and carbon, silicon forms the carbide of rare earth element, silicide etc., these compounds
Hardness is high, good corrosion resistance, is effectively improved the service life of turbine blade；
(5) a kind of anti-water erosion turbine blade of the present invention, in the preparation, using the handling process of quenching+double tempering,
The pearlitic structrure of austenitic formation is more uniformly distributed, avoids the formation of incomplete same tissue, prevents blade from producing fragility and opening
Split, reached purpose less than technique effect；Wind guide tank is manufactured by the way of Electrolyzed Processing in processing and except wet sump, electricity
Solution processing is not influenceed by material processing characteristics, and formed precision is high, and repeatable accuracy is also high, high in machining efficiency, and school mould number can subtract
Few 3/4,5-6 times of efficiency can be improved compared with copy milling；The silver soldering stellite alloy film at the outer arc of blade leading edge top, effectively
Ground solves the serious water erosion damage problem of vane tip.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is Fig. 1 top view；
Wherein：1st, blade root；2nd, blade profile；3rd, integral shroud；4th, leading edge；5th, inner arc；6th, trailing edge；7th, air slot；8th, except wet sump；9th, draw
Muscle hole；10th, through hole.
Embodiment
Embodiment 1
A kind of anti-water erosion turbine blade that the present embodiment provides, structure as shown in figure 1, including blade root 1, blade profile 2 and integral shroud 3,
Blade root 1, blade profile 2, integral shroud 3 are sequentially connected, and blade root 1 is multifork root 1, and blade profile 2 includes leading edge 4, inner arc 5, trailing edge 6 and outer
Arc, the middle and upper part of blade profile 2 are provided with lacing hole 9, air slot 7 are provided with blade profile 2 and except wet sump 8,
Air slot 7 is at least provided with two, and air slot 7 is each parallel to trailing edge 6, and the width of air slot 7 is from leading edge 4 to outlet
One end that side 6 becomes narrow gradually the air slot 7 is located at leading edge 4, air slot 7 by leading edge 4 towards trailing edge 6,
Except the one end of wet sump 8 is located at the junction of blade profile 2 and integral shroud 3, except wet sump 8 is close to trailing edge 6, except wet sump 8 is by the direction of integral shroud 3
Blade root 1, the remote end of air slot 7 connect with the end except wet sump 8, correspond on integral shroud 3 except the position of the end of wet sump 8 opens up
There is through hole 10.
The mass percent of chemical composition for the anti-water erosion turbine blade that the present embodiment provides is：C：0.15%th, Si：
0.19%th, Ni：0.65%th, Cr：3.5%th, Mo：0.69%th, V：0.11%th, W：0.56%th, Ti：5.3%th, Nb：0.34%th, Al：
4.8%th, Cu：0.08%th, Ce：0.01%th, Nd：0.02%th, Dy：0.01%th, Fe：83.59%.
A kind of preparation method of anti-water erosion turbine blade, comprises the following steps：
S1：The mass percent of each composition in predetermined anti-water erosion turbine blade raw material is added raw materials into smelting furnace, will
The temperature of smelting furnace is adjusted to 1550 DEG C, after raw material thawing, is sufficiently stirred, raw material is smelted into alloy solution；
S2：Alloy solution is cooled to 670 DEG C by way of water cooling, alloy is formed, then by alloy by way of air cooling
It is cooled to room temperature；
S3：Alloy is placed again into smelting furnace, the temperature of smelting furnace is adjusted to 1600 DEG C, alloy is smelted into alloy again
Solution, alloy solution is cooled to 850 DEG C by way of water cooling, then adds refining agent and carry out refining slagging-off, refining time 5
Minute；
S4：Alloy solution after slagging-off is heated to 900 DEG C, then alloy solution is poured into mold and poured into a mould, obtains leaf
Piece embryo material；
S5：Blade embryo material is put into glowing furnace and carries out Quenching Treatment, the medium of quenching is mineral oil, and hardening heat is 820 DEG C,
280 DEG C are cooled to after quenching, then blade embryo material is put into tempering furnace, furnace temperature is adjusted to 725 DEG C of progress tempers, tempering
Time is 30 minutes, and room temperature is cooled to after tempering, blade embryo material is put into tempering furnace again afterwards, furnace temperature is adjusted into 650 DEG C, entered
Row double tempering, tempering time are 35 minutes, are cooled to room temperature after tempering again；
S6：Electrolyzed Processing is carried out to blade embryo material, blade embryo material is connect to the positive pole of dc source, tool-electrode connects the negative of power supply
Pole, blade embryo material is placed in electrolyte, 0.1mm gap is kept between two-stage, there is the electrolyte of 0.5MPa pressure from two
The gap high speed of interpolar flows through, when machining tool negative electrode is constantly fed to blade semi-finished product, in the leaf in face of machining tool
In piece surface of semi-finished, the metal material of blade semi-finished product can constantly be dissolved by the shape in cathode type face, and electrolysate is by a high speed
Electrolyte is taken away, so that forming wind guide tank on blade semi-finished product and except wet sump 8, obtains formed blades；
S7：Polished at the top outer arc of formed blades leading edge 4, then cleaned with ethanol, silver soldering piece is placed on and beaten
At mill, then stellite after high-ranking officers' shape covers, and is heated by hand with oxy-acetylene flame, soldering, pricker are carried out to stellite
The temperature control of weldering high temperature hold time up to 35 seconds, stellite is welded securely at 650-720 DEG C；
S8：The formed blades that are obtained to S7 continue ultrasonic examination processing, then obtained after cleaning, antirust treatment blade into
Product.
Embodiment 2
A kind of anti-water erosion turbine blade that the present embodiment provides, structure as shown in figure 1, including blade root 1, blade profile 2 and integral shroud 3,
Blade root 1, blade profile 2, integral shroud 3 are sequentially connected, and blade root 1 is multifork root 1, and blade profile 2 includes leading edge 4, inner arc 5, trailing edge 6 and outer
Arc, the middle and upper part of blade profile 2 are provided with lacing hole 9, air slot 7 are provided with blade profile 2 and except wet sump 8,
Air slot 7 is at least provided with two, and air slot 7 is each parallel to trailing edge 6, and the width of air slot 7 is from leading edge 4 to outlet
One end that side 6 becomes narrow gradually the air slot 7 is located at leading edge 4, air slot 7 by leading edge 4 towards trailing edge 6,
Except the one end of wet sump 8 is located at the junction of blade profile 2 and integral shroud 3, except wet sump 8 is close to trailing edge 6, except wet sump 8 is by the direction of integral shroud 3
Blade root 1, the remote end of air slot 7 connect with the end except wet sump 8, correspond on integral shroud 3 except the position of the end of wet sump 8 opens up
There is through hole 10.
The mass percent of chemical composition for the anti-water erosion turbine blade that the present embodiment provides is：C：0.26%th, Si：
0.32%th, Ni：0.69%th, Cr：4.6%th, Mo：0.76%th, V：0.18%th, W：0.59%th, Ti：5.8%th, Nb：0.49%th, Al：
5.2%th, Cu：0.14%th, Ce：0.03%th, Nd：0.03%th, Dy：0.02%th, Fe：80.89%.
A kind of preparation method of anti-water erosion turbine blade, comprises the following steps：
S1：The mass percent of each composition in predetermined anti-water erosion turbine blade raw material is added raw materials into smelting furnace, will
The temperature of smelting furnace is adjusted to 1550 DEG C, after raw material thawing, is sufficiently stirred, raw material is smelted into alloy solution；
S2：Alloy solution is cooled to 650 DEG C by way of water cooling, alloy is formed, then by alloy by way of air cooling
It is cooled to room temperature；
S3：Alloy is placed again into smelting furnace, the temperature of smelting furnace is adjusted to 1650 DEG C, alloy is smelted into alloy again
Solution, alloy solution is cooled to 865 DEG C by way of water cooling, then adds refining agent and carry out refining slagging-off, refining time
10 minutes；
S4：Alloy solution after slagging-off is heated to 920 DEG C, then alloy solution is poured into mold and poured into a mould, obtains leaf
Piece embryo material；
S5：Blade embryo material is put into glowing furnace and carries out Quenching Treatment, the medium of quenching is mineral oil, and hardening heat is 845 DEG C,
300 DEG C are cooled to after quenching, then blade embryo material is put into tempering furnace, furnace temperature is adjusted to 725 DEG C of progress tempers, tempering
Time is 35 minutes, and room temperature is cooled to after tempering, blade embryo material is put into tempering furnace again afterwards, furnace temperature is adjusted into 650 DEG C, entered
Row double tempering, tempering time are 40 minutes, are cooled to room temperature after tempering again；
S6：Electrolyzed Processing is carried out to blade embryo material, blade embryo material is connect to the positive pole of dc source, tool-electrode connects the negative of power supply
Pole, blade embryo material is placed in electrolyte, 0.8mm gap is kept between two-stage, there is the electrolyte of 2.5MPa pressure from two
The gap high speed of interpolar flows through, when machining tool negative electrode is constantly fed to blade semi-finished product, in the leaf in face of machining tool
In piece surface of semi-finished, the metal material of blade semi-finished product can constantly be dissolved by the shape in cathode type face, and electrolysate is by a high speed
Electrolyte is taken away, so that forming wind guide tank on blade semi-finished product and except wet sump 8, obtains formed blades；
S7：Polished at the top outer arc of formed blades leading edge 4, then cleaned with ethanol, silver soldering piece is placed on and beaten
At mill, then stellite after high-ranking officers' shape covers, and is heated by hand with oxy-acetylene flame, soldering, pricker are carried out to stellite
The temperature control of weldering high temperature hold time up to 35 seconds, stellite is welded securely at 720 DEG C；
S8：The formed blades that are obtained to S7 continue ultrasonic examination processing, then obtained after cleaning, antirust treatment blade into
Product.
Embodiment 3
A kind of anti-water erosion turbine blade that the present embodiment provides, structure as shown in figure 1, including blade root 1, blade profile 2 and integral shroud 3,
Blade root 1, blade profile 2, integral shroud 3 are sequentially connected, and blade root 1 is multifork root 1, and blade profile 2 includes leading edge 4, inner arc 5, trailing edge 6 and outer
Arc, the middle and upper part of blade profile 2 are provided with lacing hole 9, air slot 7 are provided with blade profile 2 and except wet sump 8,
Air slot 7 is at least provided with two, and air slot 7 is each parallel to trailing edge 6, and the width of air slot 7 is from leading edge 4 to outlet
One end that side 6 becomes narrow gradually the air slot 7 is located at leading edge 4, air slot 7 by leading edge 4 towards trailing edge 6,
Except the one end of wet sump 8 is located at the junction of blade profile 2 and integral shroud 3, except wet sump 8 is close to trailing edge 6, except wet sump 8 is by the direction of integral shroud 3
Blade root 1, the remote end of air slot 7 connect with the end except wet sump 8, correspond on integral shroud 3 except the position of the end of wet sump 8 opens up
There is through hole 10.
The mass percent of chemical composition for the anti-water erosion turbine blade that the present embodiment provides is：C：0.21%th, Si：
0.26%th, Ni：0.67%th, Cr：4.1%th, Mo：0.73%th, V：0.15%th, W：0.57%th, Ti：5.6%th, Nb：0.42%th, Al：
5.0%th, Cu：0.11%th, Ce：0.02%th, Nd：0.02%th, Dy：0.02%th, Fe：82.12%.
A kind of preparation method of anti-water erosion turbine blade, comprises the following steps：
S1：The mass percent of each composition in predetermined anti-water erosion turbine blade raw material is added raw materials into smelting furnace, will
The temperature of smelting furnace is adjusted to 1525 DEG C, after raw material thawing, is sufficiently stirred, raw material is smelted into alloy solution；
S2：Alloy solution is cooled to 660 DEG C by way of water cooling, alloy is formed, then by alloy by way of air cooling
It is cooled to room temperature；
S3：Alloy is placed again into smelting furnace, the temperature of smelting furnace is adjusted to 1625 DEG C, alloy is smelted into alloy again
Solution, alloy solution is cooled to 860 DEG C by way of water cooling, then adds refining agent and carry out refining slagging-off, refining time 8
Minute；
S4：Alloy solution after slagging-off is heated to 910 DEG C, then alloy solution is poured into mold and poured into a mould, obtains leaf
Piece embryo material；
S5：Blade embryo material is put into glowing furnace and carries out Quenching Treatment, the medium of quenching is mineral oil, and hardening heat is 830 DEG C,
290 DEG C are cooled to after quenching, then blade embryo material is put into tempering furnace, furnace temperature is adjusted to 725 DEG C of progress tempers, tempering
Time is 33 minutes, and room temperature is cooled to after tempering, blade embryo material is put into tempering furnace again afterwards, furnace temperature is adjusted into 650 DEG C, entered
Row double tempering, tempering time are 38 minutes, are cooled to room temperature after tempering again；
S6：Electrolyzed Processing is carried out to blade embryo material, blade embryo material is connect to the positive pole of dc source, tool-electrode connects the negative of power supply
Pole, blade embryo material is placed in electrolyte, 0.5mm gap is kept between two-stage, there is the electrolyte of 1MPa pressure from the two poles of the earth
Between gap high speed flow through, when machining tool negative electrode is constantly fed to blade semi-finished product, in the blade in face of machining tool
In surface of semi-finished, the metal material of blade semi-finished product can constantly be dissolved by the shape in cathode type face, and electrolysate is by electricity at a high speed
Solution liquid band is walked, so that forming wind guide tank on blade semi-finished product and except wet sump 8, obtains formed blades；
S7：Polished at the top outer arc of formed blades leading edge 4, then cleaned with ethanol, silver soldering piece is placed on and beaten
At mill, then stellite after high-ranking officers' shape covers, and is heated by hand with oxy-acetylene flame, soldering, pricker are carried out to stellite
The temperature control of weldering high temperature hold time up to 35 seconds, stellite is welded securely at 680 DEG C；
S8：The formed blades that are obtained to S7 continue ultrasonic examination processing, then obtained after cleaning, antirust treatment blade into
Product.
Comparative example：The turbine blade of commercially available Jiangsu Rugao sheng sky turbine blade Manufacturing Co., Ltd production.
1~embodiment of embodiment 3 and comparative example are subjected to contrast test test, properties are measured by national standard, are tried
Test condition and other experiment material all sames, test result are as shown in table 1：
Table 1
From the point of view of the result of the test of table 1, in turbine blade prepared by the present invention compared with commercial like product, it is remarkably improved
The Brinell hardness of product, improve the intensity of product；Be advantageous to strengthen the elongation percentage and the contraction percentage of area of product, so as to improve production
The toughness and plasticity of product；The tensile strength of product can also be improved, the mechanical performance of blade is substantially increased, extend making for blade
With the life-span, in addition, steam utilization is also obviously improved, the operating efficiency of turbine blade is set to be lifted.It is prepared by the present invention
Turbine blade also significantly improve liquid impact erosion resistance, extend the service life of turbine blade.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
Into technical scheme, all fall within the protection domains of application claims.
Claims (9)
1. a kind of anti-water erosion turbine blade, including blade root (1), blade profile (2) and integral shroud (3), the blade root (1), blade profile (2),
Integral shroud (3) is sequentially connected, and the blade profile (2) includes leading edge (4), inner arc (5), trailing edge (6) and outer arc, it is characterised in that：
Air slot (7) is provided with the blade profile (2) and except wet sump (8), one end of the air slot (7) is located at leading edge (4), described
Air slot (7) by leading edge (4) towards trailing edge (6), the connection that blade profile (2) and integral shroud (3) are located at except wet sump (8) one end
Place, it is described except wet sump (8) is close to trailing edge (6), it is described except wet sump (8) by integral shroud (3) towards blade root (1), the air slot (7)
Remote end the position of wet sump (8) end removed with corresponding to except the end of wet sump (8) connect, on the integral shroud (3) offer
Through hole (10).
A kind of 2. anti-water erosion turbine blade according to claim 1, it is characterised in that：The air slot (7) at least sets
Two are equipped with, the air slot (7) is each parallel to trailing edge (6).
A kind of 3. anti-water erosion turbine blade according to claim 1, it is characterised in that：The width of the air slot (7)
Become narrow gradually from leading edge (4) to trailing edge (6).
A kind of 4. anti-water erosion turbine blade according to claim 1, it is characterised in that：The middle and upper part of the blade profile (2)
It is provided with lacing hole (9).
A kind of 5. anti-water erosion turbine blade according to claim 1, it is characterised in that：The blade root (1) is forked type leaf
Root (1).
A kind of 6. anti-water erosion turbine blade according to claim 1, it is characterised in that：The anti-water erosion turbine blade
The mass percent of chemical composition be：C：0.15-0.26%、Si：0.19-0.32%、Ni：0.65-0.69%、Cr：3.5-
4.6%、Mo：0.69-0.76%、V：0.11-0.18%、W：0.56-0.59%、Ti：5.3-5.8%、Nb：0.34-0.49%、Al：
4.8-5.2%、Cu：0.08-0.14%、Ce：0.01-0.03%、Nd：0.02-0.03%、Dy：0.01-0.02%, surplus Fe.
A kind of 7. anti-water erosion turbine blade according to claim 1, it is characterised in that：The anti-water erosion turbine blade
The mass percent of chemical composition be：C：0.21%、Si：0.26%、Ni：0.67%、Cr：4.1%、Mo：0.73%、V：0.15%、
W：0.57%、Ti：5.6%、Nb：0.42%、Al：5.0%、Cu：0.11%、Ce：0.02%、Nd：0.02%、Dy：0.02%、Fe：
82.12%。
A kind of 8. preparation method of anti-water erosion turbine blade as claimed in claim 6, it is characterised in that：Including following step
Suddenly：
S1：The mass percent of each composition in predetermined anti-water erosion turbine blade raw material is added raw materials into smelting furnace, will
The temperature of smelting furnace is adjusted to 1500-1550 DEG C, after raw material thawing, is sufficiently stirred, raw material is smelted into alloy solution；
S2：Alloy solution is cooled to 670-650 DEG C by way of water cooling, forms alloy, then will by way of air cooling
Alloy is cooled to room temperature；
S3：Alloy is placed again into smelting furnace, the temperature of smelting furnace is adjusted to 1600-1650 DEG C, makes alloy melting again
Into alloy solution, alloy solution is cooled to 850-865 DEG C by way of water cooling, refining agent is then added and carries out refining and remove
Slag, refining time 5-10 minutes；
S4：Alloy solution after slagging-off is heated to 900-920 DEG C, then alloy solution is poured into mold and poured into a mould, is obtained
To blade embryo material；
S5：Blade embryo material is put into glowing furnace and carries out Quenching Treatment, the medium of quenching is mineral oil, hardening heat 820-
845 DEG C, 280-300 DEG C is cooled to after quenching, then blade embryo material is put into tempering furnace, furnace temperature is adjusted into 725 DEG C is returned
Fire processing, tempering time is 30-35 minutes, and room temperature is cooled to after tempering, blade embryo material is put into tempering furnace again afterwards, by stove
Temperature is adjusted to 650 DEG C, carries out double tempering, tempering time is 35-40 minutes, is cooled to room temperature after tempering again；
S6：Electrolyzed Processing is carried out to blade embryo material, blade embryo material is connect to the positive pole of dc source, tool-electrode connects the negative of power supply
Pole, blade embryo material is placed in electrolyte, 0.1-0.8mm gap is kept between two-stage, the electricity with 0.5-2.5MPa pressure
Solution liquid flows through from the gap high speed of two interpolars, when machining tool negative electrode is constantly fed to blade semi-finished product, in face of processing
In the blade surface of semi-finished of instrument, the metal material of blade semi-finished product can constantly be dissolved by the shape in cathode type face, electrolysis production
Thing is walked by high speed electrolytic liquid band, so that forming wind guide tank on blade semi-finished product and except wet sump (8), obtains formed blades；
S7：Polished at the outer arc of formed blades leading edge (4) top, then cleaned with ethanol, silver soldering piece is placed on
Stellite after burnishing part, then high-ranking officers' shape covers, and is heated by hand with oxy-acetylene flame, soldering is carried out to stellite,
Stellite is welded securely；
S8：The formed blades that are obtained to S7 continue ultrasonic examination processing, then obtained after cleaning, antirust treatment blade into
Product.
A kind of 9. anti-water erosion turbine blade according to claim 8, it is characterised in that：The temperature control of soldering in the S7
System is at 650-720 DEG C, high temperature hold time up to 35 seconds.
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| CN201710928924.1A CN107524474A (en) | 2017-11-10 | 2017-11-10 | A kind of anti-water erosion turbine blade |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825310A (en) * | 2018-06-08 | 2018-11-16 | 南京赛达机械制造有限公司 | A kind of low-cost high-temperature alloy turbine blade |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825310A (en) * | 2018-06-08 | 2018-11-16 | 南京赛达机械制造有限公司 | A kind of low-cost high-temperature alloy turbine blade |
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Application publication date: 20171229 |