CN104032239B - A kind of corrosion-resistant turbine blade and production technique thereof - Google Patents
A kind of corrosion-resistant turbine blade and production technique thereof Download PDFInfo
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Abstract
The invention discloses a kind of corrosion-resistant turbine blade, the mass percent of its chemical composition is: C:0.29-0.31%, Si:0.11-0.13%, Mn:0.69-0.73%, Ni:0.60-0.62%, Cr:9.5-9.7%, V:0.15-0.17%, Nb:0.16-0.18%, Cu:0.05-0.07%, Al:0.21-0.23%, Ti:0.13-0.15%, Sb:0.75-0.77%, Co:0.82-0.88%, S≤0.03%, P≤0.02%, rare earth metal: 0.09-0.12%, surplus is Fe; The present invention can improve water erosion resistent ability and the corrosion resistance of blade, thus improves the work-ing life of blade.
Description
Technical field
The present invention relates to a kind of turbine blade and production technique thereof, a kind of corrosion-resistant turbine blade and production technique thereof, belong to turbine making field specifically.
Background technology
Steam turbine is the rotary power machinery energy transformation of steam being become mechanical work, also known as steam turbine.Main primover being used as generating, also can the various pump of Direct driver, blower fan, compressor and propeller for vessels etc., the steam discharge of steam turbine or intermediate extraction can also be utilized to meet and produce and heat supply needs in life.Steam turbine is mainly used in the fields such as power industry, shipping industry, cement, chemical industry, oil, metallurgy, heavy-duty machinery.
Steam turbine is a kind of revolving hydrodynamic force machinery, and it directly plays a part the thermal energy of steam or combustion gas is mechanical energy, and blade is steam turbine " heart ", is part very main in steam turbine.Blade is the vitals in steam turbine, the kinetic energy of steam flow being converted to useful work, and its Working environment is extremely severe, and the working conditions of each grade blade is all not identical.
Except working in high temperature super heated steam, easily there is high temperature oxidation and corrosion, abrasion and high temperature creep and destroying in what rotor blade initial.Along with the expansion working of superheated vapour, vapor temperature reduces gradually, although last a few grade blade working temperature lower (60 DEG C-110 DEG C), blade bears washing away of the water droplet be mingled with in steam, causes water erosion.In addition, be deposited on solubility salt crust (as sodium salt) on blade in operational process and absorb moisture content that steam condenses because temperature reduces and form corrosive electrolyte and overlay on blade surface, cause galvanic corrosion.Last stage blade, at centrifugal force, under the complex stress condition that blade vibration and water wash away, adds under working in and having corrosive environment, often produces stress corrosion, corrosion fatigue, tiredly waits destruction.The blade of considered repealed is usually the result of above-mentioned multiple failure mode compound.
The working temperature of each grade blade is not identical, and be operated in the severe environment such as high temperature, high pressure, high rotating speed or wet-steam region, undergo the acting in conjunction of centrifugal force, steam power, steam-excited vibration power, corrosion and vibration and the erosion of wet-steam region high velocity water droplets.
In addition, blade not only quantity is many, and complex-shaped, and processing request is strict.The labor content of blade is very large, account for steam turbine, the total amount of finish of internal combustion turbine 1/1 to three/4th.The processing quality of blade directly has influence on operational efficiency and the reliable rows of unit, and the processing mode of the quality of blade and life-span and blade has close relationship.So the processing mode of blade has a great impact the work quality of steam turbine and production economy.Along with the development of science and technology, the processing means of blade is also with rapid changepl. never-ending changes and improvements, and advanced processing technology extensively adopts.Meet the application that the use properties demand improved constantly only relies on new blade material to be still difficult to meet, in the middle of the manufacture that various heat treatment technics must be applied to turbine blade, just can reach corrosion-resistant to blade tool, high-level efficiency, high precision and the requirement of high life.
Summary of the invention
Technical problem to be solved by this invention is: how to make blade stiffness reach 281-307HB, hardness can not be too high or too low; How to improve water erosion resistent ability and the corrosion resistance of blade, thus improve the work-ing life of blade.
In order to solve above technical problem, the invention provides a kind of corrosion-resistant turbine blade and production technique thereof.
The technical scheme that the present invention solves above technical problem is:
A kind of corrosion-resistant turbine blade, the mass percent of its chemical composition is: C:0.29-0.31%, Si:0.11-0.13%, Mn:0.69-0.73%, Ni:0.60-0.62%, Cr:9.5-9.7%, V:0.15-0.17%, Nb:0.16-0.18%, Cu:0.05-0.07%, Al:0.21-0.23%, Ti:0.13-0.15%, Sb:0.75-0.77%, Co:0.82-0.88%, S≤0.03%, P≤0.02%, rare earth metal: 0.09-0.12%, surplus is Fe;
The chemical composition mass percent of rare earth metal is: cerium: 7-9%, praseodymium: 6-8%, neodymium: 13-15%, gadolinium: 5-7%, dysprosium: 2-4%, europium: 1-3%, terbium: 9-11%, holmium: 4-6%, and surplus is lanthanum.
The production technique of above-mentioned corrosion-resistant turbine blade is: undertaken by following operation: forge hot → annealing → blade mechanism processing → destressing thermal treatment → Tempering and Quenching → surface strengthening thermal treatment → physical and chemical inspection → UT (Ultrasonic Testing) → clean packaging; Wherein:
After forge hot, temperature is 791-794 DEG C, and insulation 15-17 minute, is then cooled to room temperature by annealing operation;
Destressing heat treatment step: adopt zone heating, first paragraph Heating temperature is 611-613 DEG C, is incubated 35-39min after temperature, and second segment Heating temperature is 571-574 DEG C, and be incubated 18-20min after temperature, then air cooling is to room temperature;
Tempering and Quenching operation: adopt a normalizing+double tempering, tempering temperature is greater than second time tempering temperature for the first time; Normalizing: formal fiery temperature 733-735 DEG C, is incubated 9-11min after temperature; First time tempering: adopt zone heating, first paragraph Heating temperature is 876-878 DEG C, is incubated 6-8min after temperature, and second segment Heating temperature is 774-776 DEG C, is incubated 14-16min after temperature, then carries out second time normalizing after air cooling to room temperature; Second time tempering: adopt zone heating, first paragraph Heating temperature is 752-754 DEG C of heating, is incubated 18-20min after temperature, and second segment Heating temperature is 615-617 DEG C of heating, is incubated 8-10min after temperature;
Surface strengthening heat treatment step: thermal treatment temp 947-949 DEG C, insulation 7-9 minute after temperature, then water-cooled is adopted to be combined with air cooling, first adopt water-cooled with the rate of cooling of 5-7 DEG C/s by blade water-cooled to 455-459 DEG C, then air cooling is to 396-399 DEG C, then adopt water-cooled with the rate of cooling of 2-4 DEG C/s by blade water-cooled to room temperature.
The technical scheme that the present invention limits further is:
Aforesaid corrosion-resistant turbine blade, the mass percent of its chemical composition is: C:0.31%, Si:0.11%, Mn:0.69%, Ni:0.61%, Cr:96%, V:0.15%, Nb:0.16%, Cu:0.07%, Al:0.22%, Ti:0.13%, Sb:0.77%, Co:0.82%, S:0.03%, P::0.01%, rare earth metal: 0.09%, surplus is Fe;
The chemical composition mass percent of rare earth metal is: cerium: 7%, praseodymium: 8%, neodymium: 14%, gadolinium: 7%, dysprosium: 4%, europium: 1%, terbium: 11%, holmium: 6%, and surplus is lanthanum.
Aforesaid corrosion-resistant turbine blade, the mass percent of its chemical composition is: C:0.29%, Si:0.12%, Mn:0.72%, Ni:0.62%, Cr:9.7%, V:0.16%, Nb:0.18%, Cu:0.05%, Al:0.23%, Ti:0.14%, Sb:0.75%, Co:0.87%, S:0.0:2%, P≤0.02%, rare earth metal: 0.12%, surplus is Fe;
The chemical composition mass percent of rare earth metal is: cerium: 8%, praseodymium: 6%, neodymium: 15%, gadolinium: 5%, dysprosium: 2%, europium: 3%, terbium: 9%, holmium: 5%, and surplus is lanthanum.
Aforesaid corrosion-resistant turbine blade, the mass percent of its chemical composition is: C:0.30%, Si:0.13%, Mn:0.73%, Ni:0.60%, Cr:9.5%, V:0.17%, Nb:0.17%, Cu:0.06%, Al:0.21%, Ti:0.15%, Sb:0.76%, Co:0.88%, S:0.0:25%, P:0.015%, rare earth metal: 0.11%, surplus is Fe;
The chemical composition mass percent of rare earth metal is: cerium: 9%, praseodymium: 7%, neodymium: 13%, gadolinium: 6%, dysprosium: 3%, europium: 2%, terbium: 10%, holmium: 4%, and surplus is lanthanum.
The production technique of aforesaid corrosion-resistant turbine blade, wherein:
After forge hot, temperature is 793 DEG C, is incubated 17 minutes, is then cooled to room temperature by annealing operation;
Destressing heat treatment step: adopt zone heating, first paragraph Heating temperature is 611 DEG C, is incubated 35min after temperature, and second segment Heating temperature is 573 DEG C, and be incubated 19min after temperature, then air cooling is to room temperature;
Tempering and Quenching operation: adopt a normalizing+double tempering, tempering temperature is greater than second time tempering temperature for the first time; Normalizing: formal fiery temperature 733 DEG C, is incubated 11min after temperature; First time tempering: adopt zone heating, first paragraph Heating temperature is 876 DEG C, is incubated 6min after temperature, and second segment Heating temperature is 776 DEG C, is incubated 14min after temperature, then carries out second time normalizing after air cooling to room temperature; Second time tempering: adopt zone heating, first paragraph Heating temperature is 753 DEG C of heating, is incubated 20min after temperature, and second segment Heating temperature is 615 DEG C of heating, is incubated 9min after temperature;
Surface strengthening heat treatment step: thermal treatment temp 949 DEG C, insulation 7 minutes after temperature, then water-cooled is adopted to be combined with air cooling, first adopt water-cooled with the rate of cooling of 7 DEG C/s by blade water-cooled to 457 DEG C, then air cooling to 396 DEG C, then adopt water-cooled with the rate of cooling of 2 DEG C/s by blade water-cooled to room temperature.
The production technique of aforesaid corrosion-resistant turbine blade, wherein:
After forge hot, temperature is 794 DEG C, is incubated 16 minutes, is then cooled to room temperature by annealing operation;
Destressing heat treatment step: adopt zone heating, first paragraph Heating temperature is 613 DEG C, is incubated 39min after temperature, and second segment Heating temperature is 571 DEG C, and be incubated 18min after temperature, then air cooling is to room temperature;
Tempering and Quenching operation: adopt a normalizing+double tempering, tempering temperature is greater than second time tempering temperature for the first time; Normalizing: formal fiery temperature 735 DEG C, is incubated 10min after temperature; First time tempering: adopt zone heating, first paragraph Heating temperature is 878 DEG C, is incubated 7min after temperature, and second segment Heating temperature is 774 DEG C, is incubated 15min after temperature, then carries out second time normalizing after air cooling to room temperature; Second time tempering: adopt zone heating, first paragraph Heating temperature is 754 DEG C of heating, is incubated 18min after temperature, and second segment Heating temperature is 616 DEG C of heating, is incubated 8min after temperature;
Surface strengthening heat treatment step: thermal treatment temp 947 DEG C, insulation 8 minutes after temperature, then water-cooled is adopted to be combined with air cooling, first adopt water-cooled with the rate of cooling of 6 DEG C/s by blade water-cooled to 459 DEG C, then air cooling to 399 DEG C, then adopt water-cooled with the rate of cooling of 3 DEG C/s by blade water-cooled to room temperature.
The production technique of aforesaid corrosion-resistant turbine blade, wherein:
After forge hot, temperature is 791 DEG C, is incubated 15 minutes, is then cooled to room temperature by annealing operation;
Destressing heat treatment step: adopt zone heating, first paragraph Heating temperature is 612 DEG C, is incubated 38min after temperature, and second segment Heating temperature is 574 DEG C, and be incubated 20min after temperature, then air cooling is to room temperature;
Tempering and Quenching operation: adopt a normalizing+double tempering, tempering temperature is greater than second time tempering temperature for the first time; Normalizing: formal fiery temperature 734 DEG C, is incubated 9min after temperature; First time tempering: adopt zone heating, first paragraph Heating temperature is 877 DEG C, is incubated 8min after temperature, and second segment Heating temperature is 775 DEG C, is incubated 16min after temperature, then carries out second time normalizing after air cooling to room temperature; Second time tempering: adopt zone heating, first paragraph Heating temperature is 752 DEG C of heating, is incubated 19min after temperature, and second segment Heating temperature is 617 DEG C of heating, is incubated 10min after temperature;
Surface strengthening heat treatment step: thermal treatment temp 948 DEG C, insulation 9 minutes after temperature, then water-cooled is adopted to be combined with air cooling, first adopt water-cooled with the rate of cooling of 5 DEG C/s by blade water-cooled to 455 DEG C, then air cooling to 398 DEG C, then adopt water-cooled with the rate of cooling of 4 DEG C/s by blade water-cooled to room temperature.
The invention has the beneficial effects as follows:
Content due to Cr in composition of the present invention is higher, and Cr element can cause the macrosegregation of carbon and alloying element, and blade there will be eutectic carbides, thus reduces the impact toughness of blade; The present invention by adding rare earth metal, and is controlled by double tempering (first time tempering and second time tempering) and temperature, thus the segregation phenomenon of blade is obviously weakened, and can increase substantially the impact toughness of blade.
Annealing operation of the present invention makes austenite carry out isothermal transformation at this temperature, forms perlite, and Ovshinsky physical efficiency completes the transformation of ball body of light within a short period of time, avoid the formation of martensite, cause steel hardening, thus make blade stiffness reach 281-307HB, be unlikely to much higher hard or too low.
Because blade working district is wet-steam region, and containing a large amount of water droplet, erosion blade under very high rim velocity and centrifugal force, make vane tip leading edge produce spot corrosion and lose efficacy, the height of blade water erosion resistent ability directly has influence on working efficiency and the safe operation of steam turbine; The present invention, by Tempering and Quenching coordination of processes refrigerating work procedure, can make blade surface produce the thick tempered martensite of 2-6mm, its water erosion resistent ability effectively improved; In addition, second time tempering temperature is less than tempering temperature for the first time can reduce the difference of the temperature in surface and heart portion, makes vane thickness direction fine microstructures even; After normalizing, tempering reduces the difference of the temperature in surface and heart portion further, thus surface to heart portion performance is reached unanimity; Cool after tempering, by the method that water-cooled is combined with air cooling, first with speed of cooling water-cooled faster, then carry out air cooling, finally pass through slower cooling by water again to room temperature, not only can improve the water erosion resistent ability of blade, and can make to organize more uniform and stable, seldom there is pore and trachoma, ensure that the corrosion resistance of blade, serve beyond thought technique effect.
The present invention can crystal grain thinning by surface strengthening thermal treatment, improve the toughness of blade simultaneously, can alleviate or eliminate the defects such as banded structure, improve blade integral impact property, and controlled by the speed of speed of cooling, and make leaf tissue more uniform and stable, seldom there is pore and trachoma, and obtain good comprehensive mechanical property and corrosion resistance.
The salient features of turbine blade of the present invention is as shown in the table:
Table 1:
Embodiment
Embodiment 1
The corrosion-resistant turbine blade of the one that the present embodiment provides, the mass percent of its chemical composition is: C:0.31%, Si:0.11%, Mn:0.69%, Ni:0.61%, Cr:96%, V:0.15%, Nb:0.16%, Cu:0.07%, Al:0.22%, Ti:0.13%, Sb:0.77%, Co:0.82%, S:0.03%, P::0.01%, rare earth metal: 0.09%, surplus is Fe;
The chemical composition mass percent of rare earth metal is: cerium: 7%, praseodymium: 8%, neodymium: 14%, gadolinium: 7%, dysprosium: 4%, europium: 1%, terbium: 11%, holmium: 6%, and surplus is lanthanum.
Terbium: 10%, holmium: 4%, surplus is lanthanum.
The production technique of the corrosion-resistant turbine blade that the present embodiment provides, is undertaken by following operation: forge hot → annealing → blade mechanism processing → destressing thermal treatment → Tempering and Quenching → surface strengthening thermal treatment → physical and chemical inspection → UT (Ultrasonic Testing) → clean packaging; Wherein:
After forge hot, temperature is 793 DEG C, is incubated 17 minutes, is then cooled to room temperature by annealing operation;
Destressing heat treatment step: adopt zone heating, first paragraph Heating temperature is 611 DEG C, is incubated 35min after temperature, and second segment Heating temperature is 573 DEG C, and be incubated 19min after temperature, then air cooling is to room temperature;
Tempering and Quenching operation: adopt a normalizing+double tempering, tempering temperature is greater than second time tempering temperature for the first time; Normalizing: formal fiery temperature 733 DEG C, is incubated 11min after temperature; First time tempering: adopt zone heating, first paragraph Heating temperature is 876 DEG C, is incubated 6min after temperature, and second segment Heating temperature is 776 DEG C, is incubated 14min after temperature, then carries out second time normalizing after air cooling to room temperature; Second time tempering: adopt zone heating, first paragraph Heating temperature is 753 DEG C of heating, is incubated 20min after temperature, and second segment Heating temperature is 615 DEG C of heating, is incubated 9min after temperature;
Surface strengthening heat treatment step: thermal treatment temp 949 DEG C, insulation 7 minutes after temperature, then water-cooled is adopted to be combined with air cooling, first adopt water-cooled with the rate of cooling of 7 DEG C/s by blade water-cooled to 457 DEG C, then air cooling to 396 DEG C, then adopt water-cooled with the rate of cooling of 2 DEG C/s by blade water-cooled to room temperature.
The salient features of the turbine blade that the present embodiment provides is as shown in the table:
Table 2:
Embodiment 2
The corrosion-resistant turbine blade of the one that the present embodiment provides, the mass percent of its chemical composition is: C:0.29%, Si:0.12%, Mn:0.72%, Ni:0.62%, Cr:9.7%, V:0.16%, Nb:0.18%, Cu:0.05%, Al:0.23%, Ti:0.14%, Sb:0.75%, Co:0.87%, S:0.0:2%, P≤0.02%, rare earth metal: 0.12%, surplus is Fe;
The chemical composition mass percent of rare earth metal is: cerium: 8%, praseodymium: 6%, neodymium: 15%, gadolinium: 5%, dysprosium: 2%, europium: 3%, terbium: 9%, holmium: 5%, and surplus is lanthanum.
The production technique of the corrosion-resistant turbine blade that the present embodiment provides, is undertaken by following operation: forge hot → annealing → blade mechanism processing → destressing thermal treatment → Tempering and Quenching → surface strengthening thermal treatment → physical and chemical inspection → UT (Ultrasonic Testing) → clean packaging; Wherein:
After forge hot, temperature is 794 DEG C, is incubated 16 minutes, is then cooled to room temperature by annealing operation;
Destressing heat treatment step: adopt zone heating, first paragraph Heating temperature is 613 DEG C, is incubated 39min after temperature, and second segment Heating temperature is 571 DEG C, and be incubated 18min after temperature, then air cooling is to room temperature;
Tempering and Quenching operation: adopt a normalizing+double tempering, tempering temperature is greater than second time tempering temperature for the first time; Normalizing: formal fiery temperature 735 DEG C, is incubated 10min after temperature; First time tempering: adopt zone heating, first paragraph Heating temperature is 878 DEG C, is incubated 7min after temperature, and second segment Heating temperature is 774 DEG C, is incubated 15min after temperature, then carries out second time normalizing after air cooling to room temperature; Second time tempering: adopt zone heating, first paragraph Heating temperature is 754 DEG C of heating, is incubated 18min after temperature, and second segment Heating temperature is 616 DEG C of heating, is incubated 8min after temperature;
Surface strengthening heat treatment step: thermal treatment temp 947 DEG C, insulation 8 minutes after temperature, then water-cooled is adopted to be combined with air cooling, first adopt water-cooled with the rate of cooling of 6 DEG C/s by blade water-cooled to 459 DEG C, then air cooling to 399 DEG C, then adopt water-cooled with the rate of cooling of 3 DEG C/s by blade water-cooled to room temperature.
The salient features of the turbine blade that the present embodiment provides is as shown in the table:
Table 3:
Embodiment 3
The corrosion-resistant turbine blade of the one that the present embodiment provides, the mass percent of its chemical composition is: C:0.30%, Si:0.13%, Mn:0.73%, Ni:0.60%, Cr:9.5%, V:0.17%, Nb:0.17%, Cu:0.06%, Al:0.21%, Ti:0.15%, Sb:0.76%, Co:0.88%, S:0.0:25%, P:0.015%, rare earth metal: 0.11%, surplus is Fe;
The chemical composition mass percent of rare earth metal is: cerium: 9%, praseodymium: 7%, neodymium: 13%, gadolinium: 6%, dysprosium: 3%, europium: 2%, terbium: 10%, holmium: 4%, and surplus is lanthanum.
The production technique of the corrosion-resistant turbine blade that the present embodiment provides, is undertaken by following operation: forge hot → annealing → blade mechanism processing → destressing thermal treatment → Tempering and Quenching → surface strengthening thermal treatment → physical and chemical inspection → UT (Ultrasonic Testing) → clean packaging; Wherein:
After forge hot, temperature is 791 DEG C, is incubated 15 minutes, is then cooled to room temperature by annealing operation;
Destressing heat treatment step: adopt zone heating, first paragraph Heating temperature is 612 DEG C, is incubated 38min after temperature, and second segment Heating temperature is 574 DEG C, and be incubated 20min after temperature, then air cooling is to room temperature;
Tempering and Quenching operation: adopt a normalizing+double tempering, tempering temperature is greater than second time tempering temperature for the first time; Normalizing: formal fiery temperature 734 DEG C, is incubated 9min after temperature; First time tempering: adopt zone heating, first paragraph Heating temperature is 877 DEG C, is incubated 8min after temperature, and second segment Heating temperature is 775 DEG C, is incubated 16min after temperature, then carries out second time normalizing after air cooling to room temperature; Second time tempering: adopt zone heating, first paragraph Heating temperature is 752 DEG C of heating, is incubated 19min after temperature, and second segment Heating temperature is 617 DEG C of heating, is incubated 10min after temperature;
Surface strengthening heat treatment step: thermal treatment temp 948 DEG C, insulation 9 minutes after temperature, then water-cooled is adopted to be combined with air cooling, first adopt water-cooled with the rate of cooling of 5 DEG C/s by blade water-cooled to 455 DEG C, then air cooling to 398 DEG C, then adopt water-cooled with the rate of cooling of 4 DEG C/s by blade water-cooled to room temperature.
The salient features of the turbine blade that the present embodiment provides is as shown in the table:
Table 4:
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (8)
1. a corrosion-resistant turbine blade, is characterized in that: the mass percent of its chemical composition is: C:0.29-0.31%, Si:0.11-0.13%, Mn:0.69-0.73%, Ni:0.60-0.62%, Cr:9.5-9.7%, V:0.15-0.17%, Nb:0.16-0.18%, Cu:0.05-0.07%, Al:0.21-0.23%, Ti:0.13-0.15%, Sb:0.75-0.77%, Co:0.82-0.88%, S≤0.03%, P≤0.02%, rare earth metal: 0.09-0.12%, surplus is Fe;
The chemical composition mass percent of described rare earth metal is: cerium: 7-9%, praseodymium: 6-8%, neodymium: 13-15%, gadolinium: 5-7%, dysprosium: 2-4%, europium: 1-3%, terbium: 9-11%, holmium: 4-6%, and surplus is lanthanum.
2. according to the corrosion-resistant turbine blade described in claim 1, it is characterized in that: the mass percent of its chemical composition is: C:0.31%, Si:0.11%, Mn:0.69%, Ni:0.61%, Cr:9.6%, V:0.15%, Nb:0.16%, Cu:0.07%, Al:0.22%, Ti:0.13%, Sb:0.77%, Co:0.82%, S:0.03%, P:0.01%, rare earth metal: 0.09%, surplus is Fe;
The chemical composition mass percent of described rare earth metal is: cerium: 7%, praseodymium: 8%, neodymium: 14%, gadolinium: 7%, dysprosium: 4%, europium: 1%, terbium: 11%, holmium: 6%, and surplus is lanthanum.
3. according to the corrosion-resistant turbine blade described in claim 1, it is characterized in that: the mass percent of its chemical composition is: C:0.29%, Si:0.12%, Mn:0.72%, Ni:0.62%, Cr:9.7%, V:0.16%, Nb:0.18%, Cu:0.05%, Al:0.23%, Ti:0.14%, Sb:0.75%, Co:0.87%, S:0.02%, P≤0.02%, rare earth metal: 0.12%, surplus is Fe;
The chemical composition mass percent of described rare earth metal is: cerium: 8%, praseodymium: 6%, neodymium: 15%, gadolinium: 5%, dysprosium: 2%, europium: 3%, terbium: 9%, holmium: 5%, and surplus is lanthanum.
4. according to the corrosion-resistant turbine blade described in claim 1, it is characterized in that: the mass percent of its chemical composition is: C:0.30%, Si:0.13%, Mn:0.73%, Ni:0.60%, Cr:9.5%, V:0.17%, Nb:0.17%, Cu:0.06%, Al:0.21%, Ti:0.15%, Sb:0.76%, Co:0.88%, S:0.025%, P:0.015%, rare earth metal: 0.11%, surplus is Fe;
The chemical composition mass percent of described rare earth metal is: cerium: 9%, praseodymium: 7%, neodymium: 13%, gadolinium: 6%, dysprosium: 3%, europium: 2%, terbium: 10%, holmium: 4%, and surplus is lanthanum.
5. according to the production technique of the corrosion-resistant turbine blade described in claim 1, undertaken by following operation: forge hot → annealing → blade mechanism processing → destressing thermal treatment → Tempering and Quenching → surface strengthening thermal treatment → physical and chemical inspection → UT (Ultrasonic Testing) → clean packaging; It is characterized in that:
After described forge hot, temperature is 791-794 DEG C, and insulation 15-17 minute, is then cooled to room temperature by described annealing operation;
Described destressing heat treatment step: adopt zone heating, first paragraph Heating temperature is 611-613 DEG C, is incubated 35-39min after temperature, and second segment Heating temperature is 571-574 DEG C, and be incubated 18-20min after temperature, then air cooling is to room temperature;
Described Tempering and Quenching operation: adopt a normalizing+double tempering, tempering temperature is greater than second time tempering temperature for the first time; Normalizing: normalizing temperature 733-735 DEG C, is incubated 9-11min after temperature; First time tempering: adopt zone heating, first paragraph Heating temperature is 876-878 DEG C, is incubated 6-8min after temperature, and second segment Heating temperature is 774-776 DEG C, is incubated 14-16min after temperature, then carries out second time tempering after air cooling to room temperature; Second time tempering: adopt zone heating, first paragraph Heating temperature is 752-754 DEG C of heating, is incubated 18-20min after temperature, and second segment Heating temperature is 615-617 DEG C of heating, is incubated 8-10min after temperature;
Described surface strengthening heat treatment step: thermal treatment temp 947-949 DEG C, insulation 7-9 minute after temperature, then water-cooled is adopted to be combined with air cooling, first adopt water-cooled with the rate of cooling of 5-7 DEG C/s by blade water-cooled to 455-459 DEG C, then air cooling is to 396-399 DEG C, then adopt water-cooled with the rate of cooling of 2-4 DEG C/s by blade water-cooled to room temperature.
6., according to the production technique of the corrosion-resistant turbine blade described in claim 5, it is characterized in that:
After described forge hot, temperature is 793 DEG C, is incubated 17 minutes, is then cooled to room temperature by described annealing operation;
Described destressing heat treatment step: adopt zone heating, first paragraph Heating temperature is 611 DEG C, is incubated 35min after temperature, and second segment Heating temperature is 573 DEG C, and be incubated 19min after temperature, then air cooling is to room temperature;
Described Tempering and Quenching operation: adopt a normalizing+double tempering, tempering temperature is greater than second time tempering temperature for the first time; Normalizing: normalizing temperature 733 DEG C, is incubated 11min after temperature; First time tempering: adopt zone heating, first paragraph Heating temperature is 876 DEG C, is incubated 6min after temperature, and second segment Heating temperature is 776 DEG C, is incubated 14min after temperature, then carries out second time tempering after air cooling to room temperature; Second time tempering: adopt zone heating, first paragraph Heating temperature is 753 DEG C of heating, is incubated 20min after temperature, and second segment Heating temperature is 615 DEG C of heating, is incubated 9min after temperature;
Described surface strengthening heat treatment step: thermal treatment temp 949 DEG C, insulation 7 minutes after temperature, then water-cooled is adopted to be combined with air cooling, first adopt water-cooled with the rate of cooling of 7 DEG C/s by blade water-cooled to 457 DEG C, then air cooling to 396 DEG C, then adopt water-cooled with the rate of cooling of 2 DEG C/s by blade water-cooled to room temperature.
7., according to the production technique of the corrosion-resistant turbine blade described in claim 5, it is characterized in that:
After described forge hot, temperature is 794 DEG C, is incubated 16 minutes, is then cooled to room temperature by described annealing operation;
Described destressing heat treatment step: adopt zone heating, first paragraph Heating temperature is 613 DEG C, is incubated 39min after temperature, and second segment Heating temperature is 571 DEG C, and be incubated 18min after temperature, then air cooling is to room temperature;
Described Tempering and Quenching operation: adopt a normalizing+double tempering, tempering temperature is greater than second time tempering temperature for the first time; Normalizing: normalizing temperature 735 DEG C, is incubated 10min after temperature; First time tempering: adopt zone heating, first paragraph Heating temperature is 878 DEG C, is incubated 7min after temperature, and second segment Heating temperature is 774 DEG C, is incubated 15min after temperature, then carries out second time tempering after air cooling to room temperature; Second time tempering: adopt zone heating, first paragraph Heating temperature is 754 DEG C of heating, is incubated 18min after temperature, and second segment Heating temperature is 616 DEG C of heating, is incubated 8min after temperature;
Described surface strengthening heat treatment step: thermal treatment temp 947 DEG C, insulation 8 minutes after temperature, then water-cooled is adopted to be combined with air cooling, first adopt water-cooled with the rate of cooling of 6 DEG C/s by blade water-cooled to 459 DEG C, then air cooling to 399 DEG C, then adopt water-cooled with the rate of cooling of 3 DEG C/s by blade water-cooled to room temperature.
8., according to the production technique of the corrosion-resistant turbine blade described in claim 5, it is characterized in that:
After described forge hot, temperature is 791 DEG C, is incubated 15 minutes, is then cooled to room temperature by described annealing operation;
Described destressing heat treatment step: adopt zone heating, first paragraph Heating temperature is 612 DEG C, is incubated 38min after temperature, and second segment Heating temperature is 574 DEG C, and be incubated 20min after temperature, then air cooling is to room temperature;
Described Tempering and Quenching operation: adopt a normalizing+double tempering, tempering temperature is greater than second time tempering temperature for the first time; Normalizing: normalizing temperature 734 DEG C, is incubated 9min after temperature; First time tempering: adopt zone heating, first paragraph Heating temperature is 877 DEG C, is incubated 8min after temperature, and second segment Heating temperature is 775 DEG C, is incubated 16min after temperature, then carries out second time tempering after air cooling to room temperature; Second time tempering: adopt zone heating, first paragraph Heating temperature is 752 DEG C of heating, is incubated 19min after temperature, and second segment Heating temperature is 617 DEG C of heating, is incubated 10min after temperature;
Described surface strengthening heat treatment step: thermal treatment temp 948 DEG C, insulation 9 minutes after temperature, then water-cooled is adopted to be combined with air cooling, first adopt water-cooled with the rate of cooling of 5 DEG C/s by blade water-cooled to 455 DEG C, then air cooling to 398 DEG C, then adopt water-cooled with the rate of cooling of 4 DEG C/s by blade water-cooled to room temperature.
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| CN107503800B (en) * | 2017-09-30 | 2019-08-06 | 南京赛达机械制造有限公司 | A kind of anti-oxidant turbine blade |
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| CN101063414A (en) * | 2006-04-26 | 2007-10-31 | 株式会社东芝 | Steam turbine and rotor |
| CN101368487A (en) * | 2008-10-07 | 2009-02-18 | 长沙理工大学 | Turbine blade with water erosion-proof coating and preparation method thereof |
| CN103133045A (en) * | 2011-12-05 | 2013-06-05 | 陶小兵 | Turbine blade made of corrosion-resistant and high-temperature-resistant intensified steel |
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| CN101063414A (en) * | 2006-04-26 | 2007-10-31 | 株式会社东芝 | Steam turbine and rotor |
| CN101368487A (en) * | 2008-10-07 | 2009-02-18 | 长沙理工大学 | Turbine blade with water erosion-proof coating and preparation method thereof |
| CN103133045A (en) * | 2011-12-05 | 2013-06-05 | 陶小兵 | Turbine blade made of corrosion-resistant and high-temperature-resistant intensified steel |
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