CN104099516B - A kind of high temperature resistant turbine blade and production technology thereof - Google Patents
A kind of high temperature resistant turbine blade and production technology thereof Download PDFInfo
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Abstract
The invention discloses a kind of high temperature resistant turbine blade, the percentage by weight chemical composition of this turbine vane is: C:0.19 0.21%, Mn:0.55 0.57%, Si:0.20 0.22%, Al:0.38 0.40%, V:0.30 0.32%, Ti:0.40 0.42%, Ni:0.12 0.14%, Sn:0.06 0.08%, Zr:0.25 0.27%, S≤0.025%, P≤0.025%, Cu≤0.20%, lanthanide rare: 0.20 0.22%, surplus is Fe；The present invention have also been devised the production technology changing turbine blade, changes production technology simple, cost, increases substantially the impact toughness of blade, improves the heat-resisting quantity of blade, and nitrided surface processes the service life improving blade.
Description
Technical field
The present invention relates to a kind of turbine blade and production technology, a kind of high temperature resistant steam turbine leaf
Sheet and production technology thereof.
Background technology
Steam turbine is one of the three big main frames in thermal power plant, and it is responsible for and heat energy is converted into the main of mechanical energy
Task, its ruuning situation directly affects the efficiency of heat engine and the safety of unit.
Steam turbine 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 the vital part of steam turbine, is again one of part the most accurate, most important.
The working environment of turbine blade is complicated and changeable, and it bears high temperature, high pressure, huge under the exacting terms of pole
Centrifugal force, steam power, steam-excited vibration power, corrode and vibrate and the common effect of wet-steam region water droplet erosion.
At high temperature the mechanical performance of the turbine blade of metal can significantly decrease, and is mainly manifested in the anti-of material
Draw, antitorque, the equicohesive hydraulic performance decline of antifatigue, but be in for a long time under high temperature when blade, blade
Internal institutional framework can change, and causes the growth in intergranular cavity, polymerization, produces high-temerature creep and destroys.
Creep failure under long-time hot conditions is metal material typical elevated temperature strength problem.Creep is to hold for a long time
Continuous high-temperature lower part part generation permanent deformation loses function so that finally rupturing.Additionally, steam turbine operation process
In bear being widely varied of repeatedly start and stop and output load, the periodicity strong variations of vapor (steam) temperature, can make
Become the low-cycle fatigue of metal material, cause losing efficacy.Creep and low-cycle fatigue all affect component life, and both
There is Non-linear coupling.
Additionally, blade not only quantity is many, and complex-shaped, and processing request is strict.The labor content of blade
Very big, account for steam turbine, 1st/1 to three/4ths of the total processing capacity of gas turbine.The crudy of blade
Directly influence 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, work quality and the production economy of steam turbine are had the biggest by the processing mode of blade
Impact.Along with the development of science and technology, the manufacturing process of blade is also with rapid changepl. never-ending changes and improvements, advanced process technology
Just widely used.Meet the serviceability demand improved constantly and rely solely on the application of new blade material still
So it is difficult to meet, it is necessary to be applied in the middle of the manufacture of turbine blade can be only achieved leaf by various heat treatment technics
Sheet tool high efficiency, high accuracy and the requirement of high life.
Summary of the invention
The technical problem to be solved is that the internal stress how making machining rear blade discharges completely, keeps away
Exempt from postorder high temperature Tempering and Quenching to be deformed or crackle, thus improve its resistance to elevated temperatures；How to make steam turbine
Blade ensures to gather the premium properties such as good hardness, stability, ductility and machinability；How to improve vapour
The service life of turbine blade.
The present invention solves the technical scheme of above technical problem:
A kind of high temperature resistant turbine blade, the percentage by weight chemical composition of this turbine blade is: C:
0.19-0.21%, Mn:0.55-0.57%, Si:0.20-0.22%, Al:0.38-0.40%, V:0.30-0.32%,
Ti:0.40-0.42%, Ni:0.12-0.14%, Sn:0.06-0.08%, Zr:0.25-0.27%, S≤0.025%,
P≤0.025%, Cu≤0.20%, lanthanide rare: 0.20-0.22%, surplus is Fe；
Lanthanide rare constituent mass percentage chemical composition is: lanthanum: 15-17%, cerium: 21-23%, praseodymium: 20-22%,
Neodymium: 18-20%, dysprosium: 13-15%, remaining lanthanide series: 7-9%, above lanthanide rare each component sum is
100%.
The production technology of above-mentioned high temperature resistant turbine blade, is carried out by following operation: base → forging → heat treatment
→ blade mechanism processing → stabilization processes → Tempering and Quenching → cooling → surfaces nitrided process → subsequent survey
Warehouse-in, concrete operations are as follows:
(1) selected percentage by weight chemical composition is made steamer in steel mill through smelting, hot rolling and cooling
Machine blade blank, cuts blank with abrasive wheel cutting machine, squeezes bar, swaging after cutting on crankshaft press
Shape, obtain turbine blade forming blank；
Select abrasive wheel cutting machine efficiency high, it is to avoid the danger that thermal stress raises occurs, heats forged again time
Time will not crack, and uses water to cool down when cutting, the frictional heat shadow to blank end face when reducing cutting
Ring, reduce the degree of depth of the heat affected layer of cut place；
(2) first forging die is preheated to 182-184 DEG C and uses mould graphite mould lubricant to forging during forging
Mould is lubricated, and the forming blank in step (1) is forged, in advance by the forging die after using preheating and lubricating
Forging temperature is 706-708 DEG C, and final forging temperature is 811-813 DEG C, obtains turbine blade semi-finished product；
Use graphite mould lubricant compared to prior art using the lubricant of molybdenum bisuphide type have preferably
Effect, molybdenum bisuphide type greasy property when temperature is too high degenerates, oxidizable, and the oxidation Decomposition temperature of graphite
Higher than molybdenum bisuphide, utilize lubricant blank and mould to be kept apart, lubricant form fluid friction, make
Blank is avoided and die surface generation direct friction, reduces resistance of deformation, prevents forging sticking to mould；
(3) the turbine blade semi-finished product obtained after forging in step (2) are heat-treated and to heat at
Turbine blade semi-finished product after reason carry out machining；
The concrete operations being heat-treated are as follows:
A anneals: after forging, insulation 9-11 minute when turbine blade semi-finished product stove heat is to 750-760 DEG C, so
Rear stove is cooled to 260-265 DEG C, then turns on fire door and continues slow cooling to 150-160 DEG C of air cooling of coming out of the stove to room temperature；
B quenches: the turbine blade semi-finished product slow stove heat after annealing in step a to 450-455 DEG C and be incubated
0.5-1h, stove heat uses Water spray turbine blade semi-finished product fast cooling after 550-555 DEG C again；
C is tempered: the turbine blade semi-finished product after quenched enter stove stove heat the most again to 240-245
Come out of the stove air cooling to room temperature after being incubated 11-13 minute after DEG C；
Use higher temperature tempering better than lonneal, so can make tissue stabilization, during preventing from using
Stress corrosion, be conducive to working long hours, and be easy to machining；
(4) the turbine blade semi-finished product after machined are carried out stabilization processes and be heated to 850-860
DEG C, it being incubated 15-18 minute, carry out air cooling subsequently or stove is cooled to room temperature, stabilization processes can eliminate stainless
Intercrystalline corrosion is inclined to；
(5) the turbine blade semi-finished product after stabilized process in step (4) are carried out Tempering and Quenching:
Using a normalizing+double tempering, temperature is more than second time temperature for the first time；Normalizing: formally fire
Temperature 745-747 DEG C, is incubated 9-11min after temperature；Tempering for the first time: using heat stepwise, first paragraph adds
Hot temperature is 876-878 DEG C, is incubated 12-14min after temperature, and second segment heating-up temperature is 805-807 DEG C, arrives
Being incubated 9-11min after temperature, then air cooling carries out second time normalizing to room temperature；Second time tempering: use segmentation
Heating, first paragraph heating-up temperature is 750-752 DEG C of heating, is incubated 19-21min, second segment heating temperature after temperature
Degree is 720-722 DEG C of heating, is incubated 8-10min after temperature；
(6) in step (5) through second time tempering after turbine blade semi-finished product be cooled to room temperature, cooling
Using water-cooled to be combined with air cooling, first employing water-cooled is with the cooling turbine blade semi-finished product water-cooled of 5-7 DEG C/s extremely
395-397 DEG C, then air cooling is to 304-306 DEG C, then uses water-cooled with the cooldown rate of 3-5 DEG C/s by rod iron water
Being cooled to 255-257 DEG C, last air cooling is to room temperature；
(7) surface of the turbine blade finished product after cooling in step (6) is carried out gas nitriding process, will
Turbine blade semi-finished product are positioned in gas nitriding furnace and are passed through NH in stove3, stove is warming up to 525-527
DEG C, keep within 20-22 hour, obtaining final turbine blade finished product；
(8) by the turbine blade finished product that obtains through the last cleaned bag of follow-up physical and chemical inspection and ultrasonic examination
Load storehouse.
The technical scheme that the present invention limits further is:
In aforementioned high temperature resistant turbine blade, the percentage by weight chemical composition of this turbine blade is: C:
0.20%, Mn:0.55%, Si:0.20%, Al:0.40%, V:0.30%, Ti:0.42%, Ni:0.13%,
Sn:0.08%, Zr:0.26%, S:0.025%, P:0.015%, Cu:0.20%, lanthanide rare: 0.21%,
Surplus is Fe；
Lanthanide rare constituent mass percentage chemical composition is: lanthanum: 15%, cerium: 21%, praseodymium: 21%, neodymium:
20%, dysprosium: 14%, remaining lanthanide series: 9%, above lanthanide rare each component sum is 100%.
In aforementioned high temperature resistant turbine blade, the percentage by weight chemical composition of this turbine blade is: C:
0.21%, Mn:0.57%, Si:0.21%, Al:0.38%, V:0.32%, Ti:0.40%, Ni:0.14%,
Sn:0.06%, Zr:0.25%, S:0.010%, P:0.009%, Cu:0.10%, lanthanide rare: 0.22%,
Surplus is Fe；
Lanthanide rare constituent mass percentage chemical composition is: lanthanum: 16%, cerium: 22%, praseodymium: 22%, neodymium:
19%, dysprosium: 13%, remaining lanthanide series: 8%, above lanthanide rare each component sum is 100%.
In aforementioned high temperature resistant turbine blade, the percentage by weight chemical composition of this turbine blade is: C:
0.19%, Mn:0.56%, Si:0.22%, Al:0.39%, V:0.31%, Ti:0.41%, Ni:0.12%,
Sn:0.07%, Zr:0.27%, S:0.012%, P:0.020%, Cu:0.15%, lanthanide rare: 0.20%,
Surplus is Fe；
Lanthanide rare constituent mass percentage chemical composition is: lanthanum: 17%, cerium: 23%, praseodymium: 20%, neodymium:
18%, dysprosium: 15%, remaining lanthanide series: 7%, above lanthanide rare each component sum is 100%.
The production technology of aforementioned high temperature resistant turbine blade, it carries out by following operation, and concrete operations are as follows:
(1) selected percentage by weight chemical composition is made steamer in steel mill through smelting, hot rolling and cooling
Machine blade blank, cuts blank with abrasive wheel cutting machine, squeezes bar, swaging after cutting on crankshaft press
Shape, obtain turbine blade forming blank；
(2) first forging die is preheated to 182 DEG C and uses die lubricant that forging die is lubricated during forging,
Forming blank in step (1) is forged by the forging die after using preheating and lubricating, and blocking temperature is 708
DEG C, final forging temperature is 812 DEG C, obtains turbine blade semi-finished product；
(3) the turbine blade semi-finished product obtained after forging in step (2) are heat-treated and to heat at
Turbine blade semi-finished product after reason carry out machining；The concrete operations being heat-treated are as follows:
A anneals: after forging, and the insulation 10 minutes when turbine blade semi-finished product stove heat is to 760 DEG C, then stove is cold
But to 263 DEG C, then turn on fire door and continue slow cooling to 150 DEG C of air coolings of coming out of the stove to room temperature；
B quenches: to 450 DEG C and the turbine blade semi-finished product slow stove heat after annealing in step a is incubated 0.8h,
Stove heat uses Water spray turbine blade semi-finished product fast cooling after 553 DEG C again；
C is tempered: the turbine blade semi-finished product after quenched enter stove stove heat the most again to after 245 DEG C
Come out of the stove air cooling to room temperature after being incubated 12 minutes；
(4) the turbine blade semi-finished product after machined are carried out stabilization processes and be heated to 855 DEG C, protect
Temperature 18 minutes, carries out air cooling subsequently or stove is cooled to room temperature；
(5) the turbine blade semi-finished product after stabilized process in step (4) are carried out Tempering and Quenching:
Using a normalizing+double tempering, temperature is more than second time temperature for the first time；Normalizing: formally fire
Temperature 746 DEG C, is incubated 10min after temperature；Tempering for the first time: use heat stepwise, first paragraph heating-up temperature
Being 877 DEG C, be incubated 12min after temperature, second segment heating-up temperature is 805 DEG C, is incubated 9min, so after temperature
Rear air cooling carries out second time normalizing to room temperature；Second time tempering: use heat stepwise, first paragraph heating-up temperature
Being 751 DEG C of heating, be incubated 20min after temperature, second segment heating-up temperature is 721 DEG C of heating, is incubated after temperature
9min；
(6) in step (5) through second time tempering after turbine blade semi-finished product be cooled to room temperature, cooling
Use water-cooled to be combined with air cooling, first use water-cooled with the cooling turbine blade semi-finished product water-cooled of 6 DEG C/s to 396
DEG C, then air cooling is to 304 DEG C, then uses water-cooled with the cooldown rate of 4 DEG C/s by rod iron water-cooled to 256 DEG C,
Rear air cooling is to room temperature；
(7) surface of the turbine blade finished product after cooling in step (6) is carried out gas nitriding process, will
Turbine blade semi-finished product are positioned in gas nitriding furnace and are passed through NH in stove3, stove is warming up to 527 DEG C,
Keep within 21 hours, obtaining final turbine blade finished product；
(8) by the turbine blade finished product that obtains through the last cleaned bag of follow-up physical and chemical inspection and ultrasonic examination
Load storehouse.
The production technology of aforementioned high temperature resistant turbine blade, it carries out by following operation, and concrete operations are as follows:
(1) selected percentage by weight chemical composition is made steamer in steel mill through smelting, hot rolling and cooling
Machine blade blank, cuts blank with abrasive wheel cutting machine, squeezes bar, swaging after cutting on crankshaft press
Shape, obtain turbine blade forming blank；
(2) first forging die is preheated to 184 DEG C and uses die lubricant that forging die is lubricated during forging,
Forming blank in step (1) is forged by the forging die after using preheating and lubricating, and blocking temperature is 706
DEG C, final forging temperature is 811 DEG C, obtains turbine blade semi-finished product；
(3) the turbine blade semi-finished product obtained after forging in step (2) are heat-treated and to heat at
Turbine blade semi-finished product after reason carry out machining；The concrete operations being heat-treated are as follows:
A anneals: after forging, and the insulation 9 minutes when turbine blade semi-finished product stove heat is to 750 DEG C, then stove is cold
But to 260 DEG C, then turn on fire door and continue slow cooling to 160 DEG C of air coolings of coming out of the stove to room temperature；
B quenches: to 455 DEG C and the turbine blade semi-finished product slow stove heat after annealing in step a is incubated 0.5h,
Stove heat uses Water spray turbine blade semi-finished product fast cooling after 550 DEG C again；
C is tempered: the turbine blade semi-finished product after quenched enter stove stove heat the most again to after 240 DEG C
Come out of the stove air cooling to room temperature after being incubated 11 minutes；
(4) the turbine blade semi-finished product after machined are carried out stabilization processes and be heated to 850 DEG C, protect
Temperature 15 minutes, carries out air cooling subsequently or stove is cooled to room temperature；
(5) the turbine blade semi-finished product after stabilized process in step (4) are carried out Tempering and Quenching:
Using a normalizing+double tempering, temperature is more than second time temperature for the first time；Normalizing: formally fire
Temperature 747 DEG C, is incubated 11min after temperature；Tempering for the first time: use heat stepwise, first paragraph heating-up temperature
Being 876 DEG C, be incubated 14min after temperature, second segment heating-up temperature is 807 DEG C, is incubated 11min, so after temperature
Rear air cooling carries out second time normalizing to room temperature；Second time tempering: use heat stepwise, first paragraph heating-up temperature
Being 750 DEG C of heating, be incubated 19min after temperature, second segment heating-up temperature is 720 DEG C of heating, is incubated after temperature
8min；
(6) in step (5) through second time tempering after turbine blade semi-finished product be cooled to room temperature, cooling
Use water-cooled to be combined with air cooling, first use water-cooled with the cooling turbine blade semi-finished product water-cooled of 5 DEG C/s to 397
DEG C, then air cooling is to 305 DEG C, then uses water-cooled with the cooldown rate of 3 DEG C/s by rod iron water-cooled to 255 DEG C,
Rear air cooling is to room temperature；
(7) surface of the turbine blade finished product after cooling in step (6) is carried out gas nitriding process, will
Turbine blade semi-finished product are positioned in gas nitriding furnace and are passed through NH in stove3, stove is warming up to 526 DEG C,
Keep within 20 hours, obtaining final turbine blade finished product；
(8) by the turbine blade finished product that obtains through the last cleaned bag of follow-up physical and chemical inspection and ultrasonic examination
Load storehouse.
The production technology of aforementioned high temperature resistant turbine blade, it carries out by following operation, and concrete operations are as follows:
(1) selected percentage by weight chemical composition is made steamer in steel mill through smelting, hot rolling and cooling
Machine blade blank, cuts blank with abrasive wheel cutting machine, squeezes bar, swaging after cutting on crankshaft press
Shape, obtain turbine blade forming blank；
(2) first forging die is preheated to 183 DEG C and uses die lubricant that forging die is lubricated during forging,
Forming blank in step (1) is forged by the forging die after using preheating and lubricating, and blocking temperature is 707
DEG C, final forging temperature is 813 DEG C, obtains turbine blade semi-finished product；
(3) the turbine blade semi-finished product obtained after forging in step (2) are heat-treated and to heat at
Turbine blade semi-finished product after reason carry out machining；The concrete operations being heat-treated are as follows:
A anneals: after forging, and the insulation 11 minutes when turbine blade semi-finished product stove heat is to 755 DEG C, then stove is cold
But to 265 DEG C, then turn on fire door and continue slow cooling to 155 DEG C of air coolings of coming out of the stove to room temperature；
B quenches: to 452 DEG C and the turbine blade semi-finished product slow stove heat after annealing in step a is incubated 1h,
Stove heat uses Water spray turbine blade semi-finished product fast cooling after 555 DEG C again；
C is tempered: the turbine blade semi-finished product after quenched enter stove stove heat the most again to after 243 DEG C
Come out of the stove air cooling to room temperature after being incubated 13 minutes；
(4) the turbine blade semi-finished product after machined are carried out stabilization processes and be heated to 860 DEG C, protect
Temperature 16 minutes, carries out air cooling subsequently or stove is cooled to room temperature；
(5) the turbine blade semi-finished product after stabilized process in step (4) are carried out Tempering and Quenching:
Using a normalizing+double tempering, temperature is more than second time temperature for the first time；Normalizing: formally fire
Temperature 745 DEG C, is incubated 9min after temperature；Tempering for the first time: using heat stepwise, first paragraph heating-up temperature is
878 DEG C, being incubated 13min after temperature, second segment heating-up temperature is 806 DEG C, is incubated 10min, then after temperature
Air cooling carries out second time normalizing to room temperature；Second time tempering: using heat stepwise, first paragraph heating-up temperature is
752 DEG C of heating, are incubated 21min after temperature, and second segment heating-up temperature is 722 DEG C of heating, are incubated 10min after temperature；
(6) in step (5) through second time tempering after turbine blade semi-finished product be cooled to room temperature, cooling
Use water-cooled to be combined with air cooling, first use water-cooled with the cooling turbine blade semi-finished product water-cooled of 7 DEG C/s to 395
DEG C, then air cooling is to 306 DEG C, then uses water-cooled with the cooldown rate of 5 DEG C/s by rod iron water-cooled to 257 DEG C,
Rear air cooling is to room temperature；
(7) surface of the turbine blade finished product after cooling in step (6) is carried out gas nitriding process, will
Turbine blade semi-finished product are positioned in gas nitriding furnace and are passed through NH in stove3, stove is warming up to 525 DEG C,
Keep within 22 hours, obtaining final turbine blade finished product；
(8) by the turbine blade finished product that obtains through the last cleaned bag of follow-up physical and chemical inspection and ultrasonic examination
Load storehouse.
In the production technology of aforementioned high temperature resistant turbine blade, step (1) use abrasive wheel cutting machine to steamer
Water cooling is used when machine blade blank is cut；First forging die is lubricated during step (2) forging, lubrication
Shi Caiyong graphite mould lubricant is lubricated.
The invention has the beneficial effects as follows:
The present invention with the addition of lanthanide rare: 0.20-0.22%, lanthanide rare constituent mass percentage chemical composition
For: lanthanum: 15-17%, cerium: 21-23%, praseodymium: 20-22%, neodymium: 18-20%, dysprosium: 13-15%, remaining
Lanthanide series: 7-9%, above lanthanide rare each component sum is 100%.Metal due to above rare earth element
Atomic radius is bigger than the atomic radius of iron, it is easy to fill up in its crystal grain and defect, and generates and can hinder crystal grain
The film of continued growth so that crystal grain refinement and improve the performance of steel, meanwhile, rare earth element easily and oxygen, sulphur,
Lead and other elements chemical combination generates the compound that fusing point is high, can play the effect purifying steel, by adding rare earth metal,
Can effectively weaken the segregation phenomenon of blade, the impact toughness of blade can be increased substantially.
The present invention cools down after forge hot the most immediately, but when turbine blade semi-finished product stove heat is to 750-760 DEG C
Being incubated 9-11 minute, then stove is cooled to 260-265 DEG C, then turns on fire door and continues slow cooling to 150-160
DEG C come out of the stove air cooling to room temperature；So make austenite carry out isothermal transformation at this temperature, form pearlite, difficult to understand
Family name's physical efficiency completes the transformation of ball body of light within a short period of time, it is to avoid forms martensite, causes steel hardening, so that leaf
Sheet is unlikely to much higher hard or too low；It addition, by cooling down after twice insulation, equal turbidity changes the ball body of light formed
Tissue ratio is more uniform, it is to avoid forms incomplete same tissue, can prevent blade premature brittle from ftractureing, serve
Beyond thought technique effect.
The blade of the present invention is serious inclined due to the effect of alloying element (such as titanium elements), carbon and alloying element
Analysis, blade there will be eutectic carbide, thus reduces the impact toughness of blade；The present invention is dilute by adding group of the lanthanides
Earth metal and temperature control, so that the segregation phenomenon of blade substantially weakens, can increase substantially leaf
The impact toughness of sheet.
Owing to blade working district is wet-steam region, and containing a large amount of water droplets, at the highest rim velocity and centrifugal force
Lower erosion blade, makes vane tip leading edge produce spot corrosion and lose efficacy, the direct shadow of height of blade water erosion resistent ability
Ring the operating efficiency to steam turbine and safe operation；The present invention passes through Tempering and Quenching coordination of processes refrigerating work procedure,
Blade surface can be made to produce 3-5mm thickness tempered martensite, its water erosion resistent ability being effectively improved；It addition,
Temperature can reduce surface and the temperature difference in heart portion less than temperature for the first time for the second time, makes blade thick
Degree direction fine microstructures is uniform；After normalizing, tempering reduces surface and the temperature difference in heart portion further, so that table
Face to heart portion performance reaches unanimity；Cool down after tempering, the method being combined with air cooling by water-cooled, first with faster
Cooling velocity water-cooled, then carries out air cooling, the most again by slower cooling by water to room temperature, not only can improve
The water erosion resistent ability of blade, and it is stable that tissue can be made to be more uniformly distributed, and pore and trachoma seldom occurs, protects
Demonstrate,prove the corrosion resistance of blade, serve beyond thought technique effect.
The present invention is by surfaces nitrided process thus improves the hardness on turbine blade surface and anti-wear performance also carries
The high use birthday noodle of blade, it is thus achieved that preferably comprehensive mechanical property and corrosion resistance, can at high temperature use
Blade.
Detailed description of the invention
Embodiment 1
The present embodiment provides a kind of high temperature resistant turbine blade, the percentage by weight chemical composition of this turbine blade
For: C:0.20%, Mn:0.55%, Si:0.20%, Al:0.40%, V:0.30%, Ti:0.42%, Ni:
0.13%, Sn:0.08%, Zr:0.26%, S:0.025%, P:0.015%, Cu:0.20%, lanthanide rare:
0.21%, surplus is Fe；
Lanthanide rare constituent mass percentage chemical composition is: lanthanum: 15%, cerium: 21%, praseodymium: 21%, neodymium:
20%, dysprosium: 14%, remaining lanthanide series: 9%, above lanthanide rare each component sum is 100%.
The production technology of the high temperature resistant turbine blade of the present embodiment, is carried out by following operation, and concrete operations are as follows:
(1) selected percentage by weight chemical composition is made steamer in steel mill through smelting, hot rolling and cooling
Machine blade blank, cuts blank with abrasive wheel cutting machine, squeezes bar, swaging after cutting on crankshaft press
Shaping, obtain turbine blade forming blank, cutting is to use water to cool down；
(2) first forging die is preheated to 182 DEG C and uses die lubricant graphite mould lubricant pair during forging
Forging die is lubricated, and the forming blank in step (1) is forged by the forging die after using preheating and lubricating,
Blocking temperature is 708 DEG C, and final forging temperature is 812 DEG C, obtains turbine blade semi-finished product；
(3) the turbine blade semi-finished product obtained after forging in step (2) are heat-treated and to heat at
Turbine blade semi-finished product after reason carry out machining；The concrete operations being heat-treated are as follows:
A anneals: after forging, and the insulation 10 minutes when turbine blade semi-finished product stove heat is to 760 DEG C, then stove is cold
But to 263 DEG C, then turn on fire door and continue slow cooling to 150 DEG C of air coolings of coming out of the stove to room temperature；
B quenches: to 450 DEG C and the turbine blade semi-finished product slow stove heat after annealing in step a is incubated 0.8h,
Stove heat uses Water spray turbine blade semi-finished product fast cooling after 553 DEG C again；
C is tempered: the turbine blade semi-finished product after quenched enter stove stove heat the most again to after 245 DEG C
Come out of the stove air cooling to room temperature after being incubated 12 minutes；
(4) the turbine blade semi-finished product after machined are carried out stabilization processes and be heated to 855 DEG C, protect
Temperature 18 minutes, carries out air cooling subsequently or stove is cooled to room temperature；
(5) the turbine blade semi-finished product after stabilized process in step (4) are carried out Tempering and Quenching:
Using a normalizing+double tempering, temperature is more than second time temperature for the first time；Normalizing: formally fire
Temperature 746 DEG C, is incubated 10min after temperature；Tempering for the first time: use heat stepwise, first paragraph heating-up temperature
Being 877 DEG C, be incubated 12min after temperature, second segment heating-up temperature is 805 DEG C, is incubated 9min, so after temperature
Rear air cooling carries out second time normalizing to room temperature；Second time tempering: use heat stepwise, first paragraph heating-up temperature
Being 751 DEG C of heating, be incubated 20min after temperature, second segment heating-up temperature is 721 DEG C of heating, is incubated after temperature
9min；
(6) in step (5) through second time tempering after turbine blade semi-finished product be cooled to room temperature, cooling
Use water-cooled to be combined with air cooling, first use water-cooled with the cooling turbine blade semi-finished product water-cooled of 6 DEG C/s to 396
DEG C, then air cooling is to 304 DEG C, then uses water-cooled with the cooldown rate of 4 DEG C/s by rod iron water-cooled to 256 DEG C,
Rear air cooling is to room temperature；
(7) surface of the turbine blade finished product after cooling in step (6) is carried out gas nitriding process, will
Turbine blade semi-finished product are positioned in gas nitriding furnace and are passed through NH in stove3, stove is warming up to 527 DEG C,
Keep within 21 hours, obtaining final turbine blade finished product；
(8) by the turbine blade finished product that obtains through the last cleaned bag of follow-up physical and chemical inspection and ultrasonic examination
Load storehouse.
The main performance of turbine blade of the present invention is as shown in the table:
Table 1:
Embodiment 2
The present embodiment provides a kind of high temperature resistant turbine blade, the percentage by weight chemical composition of this turbine blade
For: C:0.21%, Mn:0.57%, Si:0.21%, Al:0.38%, V:0.32%, Ti:0.40%, Ni:
0.14%, Sn:0.06%, Zr:0.25%, S:0.010%, P:0.009%, Cu:0.10%, lanthanide rare:
0.22%, surplus is Fe；
Lanthanide rare constituent mass percentage chemical composition is: lanthanum: 16%, cerium: 22%, praseodymium: 22%, neodymium:
19%, dysprosium: 13%, remaining lanthanide series: 8%, above lanthanide rare each component sum is 100%.
The production technology of the high temperature resistant turbine blade of the present embodiment, is carried out by following operation, and concrete operations are as follows:
(1) selected percentage by weight chemical composition is made steamer in steel mill through smelting, hot rolling and cooling
Machine blade blank, cuts blank with abrasive wheel cutting machine, squeezes bar, swaging after cutting on crankshaft press
Shaping, obtain turbine blade forming blank, during cutting, use water cools down；
(2) first forging die is preheated to 184 DEG C and uses die lubricant graphite mould lubricant pair during forging
Forging die is lubricated, and the forming blank in step (1) is forged by the forging die after using preheating and lubricating,
Blocking temperature is 706 DEG C, and final forging temperature is 811 DEG C, obtains turbine blade semi-finished product；
(3) the turbine blade semi-finished product obtained after forging in step (2) are heat-treated and to heat at
Turbine blade semi-finished product after reason carry out machining；The concrete operations being heat-treated are as follows:
A anneals: after forging, and the insulation 9 minutes when turbine blade semi-finished product stove heat is to 750 DEG C, then stove is cold
But to 260 DEG C, then turn on fire door and continue slow cooling to 160 DEG C of air coolings of coming out of the stove to room temperature；
B quenches: to 455 DEG C and the turbine blade semi-finished product slow stove heat after annealing in step a is incubated 0.5h,
Stove heat uses Water spray turbine blade semi-finished product fast cooling after 550 DEG C again；
C is tempered: the turbine blade semi-finished product after quenched enter stove stove heat the most again to after 240 DEG C
Come out of the stove air cooling to room temperature after being incubated 11 minutes；
(4) the turbine blade semi-finished product after machined are carried out stabilization processes and be heated to 850 DEG C, protect
Temperature 15 minutes, carries out air cooling subsequently or stove is cooled to room temperature；
(5) the turbine blade semi-finished product after stabilized process in step (4) are carried out Tempering and Quenching:
Using a normalizing+double tempering, temperature is more than second time temperature for the first time；Normalizing: formally fire
Temperature 747 DEG C, is incubated 11min after temperature；Tempering for the first time: use heat stepwise, first paragraph heating-up temperature
Being 876 DEG C, be incubated 14min after temperature, second segment heating-up temperature is 807 DEG C, is incubated 11min, so after temperature
Rear air cooling carries out second time normalizing to room temperature；Second time tempering: use heat stepwise, first paragraph heating-up temperature
Being 750 DEG C of heating, be incubated 19min after temperature, second segment heating-up temperature is 720 DEG C of heating, is incubated after temperature
8min；
(6) in step (5) through second time tempering after turbine blade semi-finished product be cooled to room temperature, cooling
Use water-cooled to be combined with air cooling, first use water-cooled with the cooling turbine blade semi-finished product water-cooled of 5 DEG C/s to 397
DEG C, then air cooling is to 305 DEG C, then uses water-cooled with the cooldown rate of 3 DEG C/s by rod iron water-cooled to 255 DEG C,
Rear air cooling is to room temperature；
(7) surface of the turbine blade finished product after cooling in step (6) is carried out gas nitriding process, will
Turbine blade semi-finished product are positioned in gas nitriding furnace and are passed through NH in stove3, stove is warming up to 526 DEG C,
Keep within 20 hours, obtaining final turbine blade finished product；
(8) by the turbine blade finished product that obtains through the last cleaned bag of follow-up physical and chemical inspection and ultrasonic examination
Load storehouse.
The main performance of turbine blade of the present invention is as shown in the table:
Table 2:
Embodiment 3
The present embodiment provides a kind of high temperature resistant turbine blade, the percentage by weight chemical composition of this turbine blade
For: C:0.19%, Mn:0.56%, Si:0.22%, Al:0.39%, V:0.31%, Ti:0.41%, Ni:
0.12%, Sn:0.07%, Zr:0.27%, S:0.012%, P:0.020%, Cu:0.15%, lanthanide rare:
0.20%, surplus is Fe；
Lanthanide rare constituent mass percentage chemical composition is: lanthanum: 17%, cerium: 23%, praseodymium: 20%, neodymium:
18%, dysprosium: 15%, remaining lanthanide series: 7%, above lanthanide rare each component sum is 100%.
The production technology of the high temperature resistant turbine blade of the present embodiment, is carried out by following operation, and concrete operations are as follows:
(1) selected percentage by weight chemical composition is made steamer in steel mill through smelting, hot rolling and cooling
Machine blade blank, cuts blank with abrasive wheel cutting machine, squeezes bar, swaging after cutting on crankshaft press
Shaping, obtain turbine blade forming blank, during cutting, use water cools down；
(2) first forging die is preheated to 183 DEG C and uses die lubricant graphite mould lubricant pair during forging
Forging die is lubricated, and the forming blank in step (1) is forged by the forging die after using preheating and lubricating,
Blocking temperature is 707 DEG C, and final forging temperature is 813 DEG C, obtains turbine blade semi-finished product；
(3) the turbine blade semi-finished product obtained after forging in step (2) are heat-treated and to heat at
Turbine blade semi-finished product after reason carry out machining；The concrete operations being heat-treated are as follows:
A anneals: after forging, and the insulation 11 minutes when turbine blade semi-finished product stove heat is to 755 DEG C, then stove is cold
But to 265 DEG C, then turn on fire door and continue slow cooling to 155 DEG C of air coolings of coming out of the stove to room temperature；
B quenches: to 452 DEG C and the turbine blade semi-finished product slow stove heat after annealing in step a is incubated 1h,
Stove heat uses Water spray turbine blade semi-finished product fast cooling after 555 DEG C again；
C is tempered: the turbine blade semi-finished product after quenched enter stove stove heat the most again to after 243 DEG C
Come out of the stove air cooling to room temperature after being incubated 13 minutes；
(4) the turbine blade semi-finished product after machined are carried out stabilization processes and be heated to 860 DEG C, protect
Temperature 16 minutes, carries out air cooling subsequently or stove is cooled to room temperature；
(5) the turbine blade semi-finished product after stabilized process in step (4) are carried out Tempering and Quenching:
Using a normalizing+double tempering, temperature is more than second time temperature for the first time；Normalizing: formally fire
Temperature 745 DEG C, is incubated 9min after temperature；Tempering for the first time: using heat stepwise, first paragraph heating-up temperature is
878 DEG C, being incubated 13min after temperature, second segment heating-up temperature is 806 DEG C, is incubated 10min, then after temperature
Air cooling carries out second time normalizing to room temperature；Second time tempering: using heat stepwise, first paragraph heating-up temperature is
752 DEG C of heating, are incubated 21min after temperature, and second segment heating-up temperature is 722 DEG C of heating, are incubated 10min after temperature；
(6) in step (5) through second time tempering after turbine blade semi-finished product be cooled to room temperature, cooling
Use water-cooled to be combined with air cooling, first use water-cooled with the cooling turbine blade semi-finished product water-cooled of 7 DEG C/s to 395
DEG C, then air cooling is to 306 DEG C, then uses water-cooled with the cooldown rate of 5 DEG C/s by rod iron water-cooled to 257 DEG C,
Rear air cooling is to room temperature；
(7) surface of the turbine blade finished product after cooling in step (6) is carried out gas nitriding process, will
Turbine blade semi-finished product are positioned in gas nitriding furnace and are passed through NH in stove3, stove is warming up to 525 DEG C,
Keep within 22 hours, obtaining final turbine blade finished product；
(8) by the turbine blade finished product that obtains through the last cleaned bag of follow-up physical and chemical inspection and ultrasonic examination
Load storehouse.
The main performance of turbine blade of the present invention is as shown in the table:
Table 3:
In above operation: forging, blade mechanism processing, subsequent survey warehouse-in (physical and chemical inspection, ultrasonic examination
With cleaning packaging
) all use existing conventional process.
In addition to the implementation, the present invention can also have other embodiments.All employing equivalents or equivalence become
Change the technical scheme of formation, all fall within the protection domain of application claims.
Claims (8)
1. a production technology for high temperature resistant turbine blade, the percentage by weight chemical composition of this turbine blade is: C:
0.19-0.21%, Mn:0.55-0.57%, Si:0.20-0.22%, Al:0.38-0.40%, V:0.30-0.32%, Ti:
0.40-0.42%, Ni:0.12-0.14%, Sn:0.06-0.08%, Zr:0.25-0.27%, S≤0.025%, P≤0.025%,
Cu≤0.20%, lanthanide rare: 0.20-0.22%, surplus is Fe；
Described lanthanide rare constituent mass percentage chemical composition is: lanthanum: 15-17%, cerium: 21-23%, praseodymium: 20-22%,
Neodymium: 18-20%, dysprosium: 13-15%, remaining lanthanide series: 7-9%, above lanthanide rare each component sum is 100%, its feature
Being, this production technology is carried out by following operation: base → forging → heat treatment → blade mechanism processing → stabilization processes → tune
Matter heat treatment → cooling → surfaces nitrided process → subsequent survey warehouse-in, concrete operations are as follows:
(1) selected percentage by weight chemical composition is made turbine blade blank in steel mill through smelting, hot rolling and cooling,
With abrasive wheel cutting machine, blank is cut, on crankshaft press, squeeze bar, swaging shaping after cutting, obtain turbine blade
Shape blank；
(2) first forging die it is preheated to 182-184 DEG C and uses die lubricant that forging die is lubricated during forging, using pre-
Forming blank in step (1) is forged by the forging die after heat lubrication, and blocking temperature is 706-708 DEG C, and final forging temperature is
811-813 DEG C, obtain turbine blade semi-finished product；
(3) the turbine blade semi-finished product obtained after forging in step (2) are heat-treated and to the steamer after being heat-treated
Machine blade semi-finished product carry out machining；
The concrete operations being heat-treated are as follows:
A anneals: after forging, and insulation 9-11 minute when turbine blade semi-finished product stove heat is to 750-760 DEG C, then stove is cooled to
260-265 DEG C, then turn on fire door and continue slow cooling to 150-160 DEG C of air cooling of coming out of the stove to room temperature；
B quenches: to 450-455 DEG C and the turbine blade semi-finished product slow stove heat after annealing in step a is incubated 0.5-1h, again
Stove heat uses Water spray turbine blade semi-finished product fast cooling after 550-555 DEG C；
C is tempered: the turbine blade semi-finished product after quenched enter stove the most again and stove heat is incubated after 240-245 DEG C
Come out of the stove air cooling to room temperature after 11-13 minute；
(4) the turbine blade semi-finished product after machined are carried out stabilization processes and be heated to 850-860 DEG C, be incubated 15-18
Minute, carry out air cooling subsequently or stove is cooled to room temperature；
(5) the turbine blade semi-finished product after stabilized process in step (4) are carried out Tempering and Quenching: the most just using
Fire+double tempering, temperature is more than second time temperature for the first time；Normalizing: normalizing temperature 745-747 DEG C, to Wen Houbao
Temperature 9-11min；Tempering for the first time: using heat stepwise, first paragraph heating-up temperature is 876-878 DEG C, is incubated 12-14min after temperature,
Second segment heating-up temperature is 805-807 DEG C, is incubated 9-11min after temperature, and then air cooling carries out second time normalizing to room temperature；The
Double tempering: using heat stepwise, first paragraph heating-up temperature is 750-752 DEG C of heating, insulation 19-21min after temperature, second
Section heating-up temperature is 720-722 DEG C of heating, is incubated 8-10min after temperature；
(6) turbine blade semi-finished product after second time tempering in step (5) are cooled to room temperature, cooling use water-cooled with
Air cooling combines, and first uses water-cooled with the cooling turbine blade semi-finished product water-cooled of 5-7 DEG C/s to 395-397 DEG C, and then air cooling is extremely
304-306 DEG C, then use water-cooled with the cooldown rate of 3-5 DEG C/s by rod iron water-cooled to 255-257 DEG C, last air cooling is to room temperature；
(7) surface of the turbine blade finished product after cooling in step (6) is carried out gas nitriding process, by turbine blade
Semi-finished product are positioned in gas nitriding furnace and are passed through NH in stove3, stove is warming up to 525-527 DEG C, keeps obtaining for 20-22 hour
Final turbine blade finished product；
(8) the turbine blade finished product obtained is put in storage through the last cleaned packaging of follow-up physical and chemical inspection and ultrasonic examination.
The production technology of high temperature resistant turbine blade the most according to claim 1, it is characterised in that: this turbine blade
Percentage by weight chemical composition is: C:0.20%, Mn:0.55%, Si:0.20%, Al:0.40%, V:0.30%, Ti:0.42%,
Ni:0.13%, Sn:0.08%, Zr:0.26%, S:0.025%, P:0.015%, Cu:0.20%, lanthanide rare: 0.21%,
Surplus is Fe；
Described lanthanide rare constituent mass percentage chemical composition is: lanthanum: 15%, cerium: 21%, praseodymium: 21%, neodymium: 20%,
Dysprosium: 14%, remaining lanthanide series: 9%, above lanthanide rare each component sum is 100%.
The production technology of high temperature resistant turbine blade the most according to claim 1, it is characterised in that: this turbine blade
Percentage by weight chemical composition is: C:0.21%, Mn:0.57%, Si:0.21%, Al:0.38%, V:0.32%, Ti:0.40%,
Ni:0.14%, Sn:0.06%, Zr:0.25%, S:0.010%, P:0.009%, Cu:0.10%, lanthanide rare: 0.22%,
Surplus is Fe；
Described lanthanide rare constituent mass percentage chemical composition is: lanthanum: 16%, cerium: 22%, praseodymium: 22%, neodymium: 19%,
Dysprosium: 13%, remaining lanthanide series: 8%, above lanthanide rare each component sum is 100%.
The production technology of high temperature resistant turbine blade the most according to claim 1, it is characterised in that: this turbine blade
Percentage by weight chemical composition is: C:0.19%, Mn:0.56%, Si:0.22%, Al:0.39%, V:0.31%, Ti:0.41%,
Ni:0.12%, Sn:0.07%, Zr:0.27%, S:0.012%, P:0.020%, Cu:0.15%, lanthanide rare: 0.20%,
Surplus is Fe；
Described lanthanide rare constituent mass percentage chemical composition is: lanthanum: 17%, cerium: 23%, praseodymium: 20%, neodymium: 18%,
Dysprosium: 15%, remaining lanthanide series: 7%, above lanthanide rare each component sum is 100%.
The production technology of high temperature resistant turbine blade the most as claimed in claim 1, it is characterised in that carry out by following operation,
Concrete operations are as follows:
(1) selected percentage by weight chemical composition is made turbine blade blank in steel mill through smelting, hot rolling and cooling,
With abrasive wheel cutting machine, blank is cut, on crankshaft press, squeeze bar, swaging shaping after cutting, obtain turbine blade
Shape blank；
(2) first forging die it is preheated to 182 DEG C and uses die lubricant that forging die is lubricated during forging, using preheating also
Forming blank in step (1) is forged by the forging die after lubrication, and blocking temperature is 708 DEG C, and final forging temperature is 812 DEG C,
Obtain turbine blade semi-finished product；
(3) the turbine blade semi-finished product obtained after forging in step (2) are heat-treated and to the steamer after being heat-treated
Machine blade semi-finished product carry out machining；The concrete operations being heat-treated are as follows:
A anneals: after forging, the insulation 10 minutes when turbine blade semi-finished product stove heat is to 760 DEG C, and then stove is cooled to 263 DEG C,
Then turn on fire door and continue slow cooling to 150 DEG C of air coolings of coming out of the stove to room temperature；
B quenches: to 450 DEG C and the turbine blade semi-finished product slow stove heat after annealing in step a is incubated 0.8h, and stove heat is extremely again
With Water spray turbine blade semi-finished product fast cooling after 553 DEG C；
C is tempered: the turbine blade semi-finished product after quenched enter stove the most again and stove heat is incubated 12 minutes after 245 DEG C
After come out of the stove air cooling to room temperature；
(4) the turbine blade semi-finished product after machined are carried out stabilization processes and are heated to 855 DEG C, be incubated 18 minutes,
Carry out air cooling subsequently or stove is cooled to room temperature；
(5) the turbine blade semi-finished product after stabilized process in step (4) are carried out Tempering and Quenching: the most just using
Fire+double tempering, temperature is more than second time temperature for the first time；Normalizing: normalizing temperature 746 DEG C, is incubated after temperature
10min；Tempering for the first time: using heat stepwise, first paragraph heating-up temperature is 877 DEG C, is incubated 12min, second segment after temperature
Heating-up temperature is 805 DEG C, is incubated 9min after temperature, and then air cooling carries out second time normalizing to room temperature；Second time tempering: adopt
With heat stepwise, first paragraph heating-up temperature is 751 DEG C of heating, is incubated 20min after temperature, and second segment heating-up temperature is 721 DEG C and adds
Heat, is incubated 9min after temperature；
(6) turbine blade semi-finished product after second time tempering in step (5) are cooled to room temperature, cooling use water-cooled with
Air cooling combines, and first uses water-cooled with the cooling turbine blade semi-finished product water-cooled of 6 DEG C/s to 396 DEG C, and then air cooling is to 304 DEG C,
Using water-cooled with the cooldown rate of 4 DEG C/s by rod iron water-cooled to 256 DEG C again, last air cooling is to room temperature；
(7) surface of the turbine blade finished product after cooling in step (6) is carried out gas nitriding process, by turbine blade
Semi-finished product are positioned in gas nitriding furnace and are passed through NH in stove3, stove is warming up to 527 DEG C, keeps obtaining final in 21 hours
Turbine blade finished product；
(8) the turbine blade finished product obtained is put in storage through the last cleaned packaging of follow-up physical and chemical inspection and ultrasonic examination.
The production technology of high temperature resistant turbine blade the most as claimed in claim 1, it is characterised in that carry out by following operation,
Concrete operations are as follows:
(1) selected percentage by weight chemical composition is made turbine blade blank in steel mill through smelting, hot rolling and cooling,
With abrasive wheel cutting machine, blank is cut, on crankshaft press, squeeze bar, swaging shaping after cutting, obtain turbine blade
Shape blank；
(2) first forging die it is preheated to 184 DEG C and uses die lubricant that forging die is lubricated during forging, using preheating also
Forming blank in step (1) is forged by the forging die after lubrication, and blocking temperature is 706 DEG C, and final forging temperature is 811 DEG C,
Obtain turbine blade semi-finished product；
(3) the turbine blade semi-finished product obtained after forging in step (2) are heat-treated and to the steamer after being heat-treated
Machine blade semi-finished product carry out machining；The concrete operations being heat-treated are as follows:
A anneals: after forging, the insulation 9 minutes when turbine blade semi-finished product stove heat is to 750 DEG C, and then stove is cooled to 260 DEG C,
Then turn on fire door and continue slow cooling to 160 DEG C of air coolings of coming out of the stove to room temperature；
B quenches: to 455 DEG C and the turbine blade semi-finished product slow stove heat after annealing in step a is incubated 0.5h, and stove heat is extremely again
With Water spray turbine blade semi-finished product fast cooling after 550 DEG C；
C is tempered: the turbine blade semi-finished product after quenched enter stove the most again and stove heat is incubated 11 minutes after 240 DEG C
After come out of the stove air cooling to room temperature；
(4) the turbine blade semi-finished product after machined are carried out stabilization processes and are heated to 850 DEG C, be incubated 15 minutes,
Carry out air cooling subsequently or stove is cooled to room temperature；
(5) the turbine blade semi-finished product after stabilized process in step (4) are carried out Tempering and Quenching: the most just using
Fire+double tempering, temperature is more than second time temperature for the first time；Normalizing: normalizing temperature 747 DEG C, is incubated after temperature
11min；Tempering for the first time: using heat stepwise, first paragraph heating-up temperature is 876 DEG C, is incubated 14min, second segment after temperature
Heating-up temperature is 807 DEG C, is incubated 11min after temperature, and then air cooling carries out second time normalizing to room temperature；Second time tempering: adopt
With heat stepwise, first paragraph heating-up temperature is 750 DEG C of heating, is incubated 19min after temperature, and second segment heating-up temperature is 720 DEG C and adds
Heat, is incubated 8min after temperature；
(6) turbine blade semi-finished product after second time tempering in step (5) are cooled to room temperature, cooling use water-cooled with
Air cooling combines, and first uses water-cooled with the cooling turbine blade semi-finished product water-cooled of 5 DEG C/s to 397 DEG C, and then air cooling is to 305 DEG C,
Using water-cooled with the cooldown rate of 3 DEG C/s by rod iron water-cooled to 255 DEG C again, last air cooling is to room temperature；
(7) surface of the turbine blade finished product after cooling in step (6) is carried out gas nitriding process, by turbine blade
Semi-finished product are positioned in gas nitriding furnace and are passed through NH in stove3, stove is warming up to 526 DEG C, keeps obtaining final in 20 hours
Turbine blade finished product；
(8) the turbine blade finished product obtained is put in storage through the last cleaned packaging of follow-up physical and chemical inspection and ultrasonic examination.
The production technology of high temperature resistant turbine blade the most as claimed in claim 1, it is characterised in that carry out by following operation,
Concrete operations are as follows:
(1) selected percentage by weight chemical composition is made turbine blade blank in steel mill through smelting, hot rolling and cooling,
With abrasive wheel cutting machine, blank is cut, on crankshaft press, squeeze bar, swaging shaping after cutting, obtain turbine blade
Shape blank；
(2) first forging die it is preheated to 183 DEG C and uses die lubricant that forging die is lubricated during forging, using preheating also
Forming blank in step (1) is forged by the forging die after lubrication, and blocking temperature is 707 DEG C, and final forging temperature is 813 DEG C,
Obtain turbine blade semi-finished product；
(3) the turbine blade semi-finished product obtained after forging in step (2) are heat-treated and to the steamer after being heat-treated
Machine blade semi-finished product carry out machining；The concrete operations being heat-treated are as follows:
A anneals: after forging, the insulation 11 minutes when turbine blade semi-finished product stove heat is to 755 DEG C, and then stove is cooled to 265 DEG C,
Then turn on fire door and continue slow cooling to 155 DEG C of air coolings of coming out of the stove to room temperature；
B quenches: to 452 DEG C and the turbine blade semi-finished product slow stove heat after annealing in step a is incubated 1h, and stove heat is to 555 again
With Water spray turbine blade semi-finished product fast cooling after DEG C；
C is tempered: the turbine blade semi-finished product after quenched enter stove the most again and stove heat is incubated 13 minutes after 243 DEG C
After come out of the stove air cooling to room temperature；
(4) the turbine blade semi-finished product after machined are carried out stabilization processes and are heated to 860 DEG C, be incubated 16 minutes,
Carry out air cooling subsequently or stove is cooled to room temperature；
(5) the turbine blade semi-finished product after stabilized process in step (4) are carried out Tempering and Quenching: the most just using
Fire+double tempering, temperature is more than second time temperature for the first time；Normalizing: normalizing temperature 745 DEG C, is incubated 9min after temperature；
Tempering for the first time: using heat stepwise, first paragraph heating-up temperature is 878 DEG C, is incubated 13min, second segment heating-up temperature after temperature
Being 806 DEG C, be incubated 10min after temperature, then air cooling carries out second time normalizing to room temperature；Second time tempering: use segmentation to add
Heat, first paragraph heating-up temperature is 752 DEG C of heating, is incubated 21min after temperature, and second segment heating-up temperature is 722 DEG C of heating, to temperature
Rear insulation 10min；
(6) turbine blade semi-finished product after second time tempering in step (5) are cooled to room temperature, cooling use water-cooled with
Air cooling combines, and first uses water-cooled with the cooling turbine blade semi-finished product water-cooled of 7 DEG C/s to 395 DEG C, and then air cooling is to 306 DEG C,
Using water-cooled with the cooldown rate of 5 DEG C/s by rod iron water-cooled to 257 DEG C again, last air cooling is to room temperature；
(7) surface of the turbine blade finished product after cooling in step (6) is carried out gas nitriding process, by turbine blade
Semi-finished product are positioned in gas nitriding furnace and are passed through NH in stove3, stove is warming up to 525 DEG C, keeps obtaining final in 22 hours
Turbine blade finished product；
(8) the turbine blade finished product obtained is put in storage through the last cleaned packaging of follow-up physical and chemical inspection and ultrasonic examination.
The production technology of high temperature resistant turbine blade the most according to claim 1, it is characterised in that: step (1) uses
Water cooling is used when turbine blade blank is cut by abrasive wheel cutting machine；First forging die is lubricated during step (2) forging,
Graphite mould lubricant is used to be lubricated during lubrication.
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| CN108301877B (en) * | 2017-09-30 | 2023-12-12 | 南京赛达机械制造有限公司 | High temperature resistant turbine blade |
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| CN102041450A (en) * | 2009-10-23 | 2011-05-04 | 宝山钢铁股份有限公司 | Ferrite heat resisting steel and manufacture method thereof |
| JP5562825B2 (en) * | 2010-12-28 | 2014-07-30 | 株式会社東芝 | Heat-resistant cast steel, method for producing heat-resistant cast steel, cast component for steam turbine, and method for producing cast component for steam turbine |
| CN103160733A (en) * | 2013-03-11 | 2013-06-19 | 济钢集团有限公司 | Steel plate for nuclear power station pressure vessel and equipment gate, and manufacturing method thereof |
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