CN106425285A - 34CrNiMo6 wind power main shaft forging forming method for low wind speed wind turbine set - Google Patents
34CrNiMo6 wind power main shaft forging forming method for low wind speed wind turbine set Download PDFInfo
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- CN106425285A CN106425285A CN201510478080.6A CN201510478080A CN106425285A CN 106425285 A CN106425285 A CN 106425285A CN 201510478080 A CN201510478080 A CN 201510478080A CN 106425285 A CN106425285 A CN 106425285A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2230/00—Manufacture
- F05B2230/20—Manufacture essentially without removing material
- F05B2230/21—Manufacture essentially without removing material by casting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2230/00—Manufacture
- F05B2230/40—Heat treatment
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Abstract
The invention discloses a 34CrNiMo6 wind power main shaft forging forming method for a low wind speed wind turbine set. The method includes the step a of adopting of electric furnace smelting, secondary refining, vacuum gas removing and vacuum steel ingot raw material casting and smelting; the step b of electro-slag remelting of a steel ingot raw material in the step a; the step c of pre-forging for blank manufacturing; the step d of final forging forming; the step e of slow cooling of a heat-preserving box; the step f of first-time rough machining, and ultrasonic non-destructive detection; the step g of isothermal normalizing for preparing heat treatment; the step h of two times of quenching and tempering final heat treatment; and the step i of detection for qualification and packaging and warehousing. By means of the 34CrNiMo6 wind power main shaft forging forming method for the low wind speed wind turbine set, the structure property of the flange portion of a wind power main shaft and the variable cross-section shaft portion is made to be uniform, and the mechanical performance of the 34CrNiMo6 wind power main shaft of the low wind speed wind turbine set is greatly improved.
Description
Technical field
Patent of the present invention is related to a kind of method for forging and molding of shaft forgings, low in particular to one kind
The method for forging and molding of the 34CrNiMo6 wind power principal axis of wind speed Wind turbines.
Background technology
The energy is the basic motive of economy and society development, and energy industry is faced with economic growth and environment
The dual-pressure of protection, the exploitation of regenerative resource are the basic choosings of global 21 century energy development
Select, wind energy is the clean renewable energy of most economic utilization and industrialization development value in addition to water energy
Source.
Wind turbines are the nucleus equipments of wind energy turbine set, and in the construction investment of wind energy turbine set, Fan Equipment is taken
It is the major part of wind-power electricity generation project investment, account for the 60%-80% of gross investment, Wind turbines are main
Part includes:Paddle, control system, electromotor, gear-box and hardware, and metal structure
Part mainly has:Cabin, pylon, main shaft and yaw system etc..
Wind driven generator principal shaft is one of critical piece of wind power generating set, close in world wide various countries
Under conditions of cutting concern exploitation wind energy, blower fan main shaft manufacture has huge market.
Finished product wind driven generator principal shaft such as Fig. 1, its key structural feature is：The size of electric machine main shaft is very
Greatly, and diameter cross difference is very big, flange diameter is much larger than axle body diameter, and flange thickness compares
Relatively thin.
At present, the method manufacturing wind power principal axis mainly has casting and forges.Casting wind power principal axis out,
Although blank dimension is accurately, processing capacity is little, low cost, have casting flaw (pore, crackle,
It is mingled with), and cast-internal flow of tissue line morphology is poor.The wind power principal axis manufacture method of present main flow is still
Using forging.Traditional forging technology and heat treatment after forging technique are：Electric furnace smelting, blocking base,
Finish forging, air cooling are just tempered, roughing nondestructive inspection detection, Tempering and Quenching, detect qualified bag
Dress.Using tradition forging and heat treatment method, because wind power principal axis size is big, common electric furnace smelting
The batch components segregation obtaining is serious, is difficult to improve in follow-up forging process, and due to wind power principal axis
Diameter cross difference very big, during heat treatment, during heating, tend to cause minor diameter
End is overheated, and during cooling, smaller diameter end is easily cold excessive.In addition, wind power principal axis are in long-term fortune
The state turning, has very high requirement to its every mechanical performance, and existing heat treatment process：Just
Tempering+quenched, can not meet its high performance requirement, thus, the main shaft of a lot of wind-powered electricity generation enterprise of China
All from external import.
Content of the invention
Technical problem solved by the invention：Overcome the drawbacks described above of existing wind power principal axis manufacturing process,
A kind of high mechanical properties and the method for forging and molding of the uniform wind power principal axis of structure property are provided.
The present invention provides following technical scheme：A kind of 34CrNiMo6 wind-powered electricity generation master of low wind speed Wind turbines
Axle method for forging and molding, it mainly includes the following steps that：
Raw material is smelted；
Forging molding；
Thick machining for the first time, Ultrasonic Nondestructive；
Heat treatment；
Removing surface, second bright finish slightly machine, mechanical performance and metallographic structure sampling observation, ultrasonic
Ripple Non-Destructive Testing is qualified, packaging and storage.
The 34CrNiMo6 wind power principal axis material composition of described low wind speed Wind turbines controls as follows：C
0.30%～0.37%, Si 0.30%～0.60%, Mn 0.60%～1.00%, Cr 1.40%～1.70%,
Ni 1.40%～1.70%, Mo 0.15%～0.35%, P<0.008%th, S<0.005%th, Cu<0.05%th,
As<0.005%th, Al<0.005%th, Sn<0.005%th, Sb<0.005%, remaining is Fe and can not keep away
The impurity exempted from.
Described raw material smelting step includes：
Step a, using electric furnace smelting+LF (external refining)+VD (vacuum degassing)+vacuum casting smelting
Steel-making ingot raw material；
Step b, by the steel ingot raw material electroslag remelting in step a.
Described forging molding step includes：
Step c, blocking base：Electroslag remelting steel ingot is heated to 1250 ± 10 DEG C of initial forging temperature, protects
Temperature more than 5 hours, bar hold, chamfered edge, round as a ball, upset, pulling, pressure side, all directions, comprehensive
Oxygen blast is hindered clearly；
Step d, finish forging：The blank being obtained in step b is reheated to 1230 ± 10 DEG C,
Insulation more than 5 hours, round as a ball, the upset flange portion of cone-plate, extract each variable cross-section axle portion, mould finishing,
Gas cutting clamps handle.
In described step d, include after finish forging：
Step e, couveuse is slowly cold, and finish forging gas cutting clamps afterwards, rapidly by wind-power spindle forging piece
Put in the couveuse with asbestos insulation material, and covered with insulation case lid so that wind power principal axis are forged
Part Slow cooling, reduces the generation of non-equilibrium microstructure, reduces hardness, is beneficial to machining；
Step f, machines thick for the first time, Ultrasonic Nondestructive；
Step g, conditioning treatment：Isothermal normalizing, described isothermal normalizing adopts push-down isothermal normalizing furnace,
Described isothermal normalizing furnace includes feeding area, the thermal treatment zone, cooling zone, heat preservation zone and discharge zone, isothermal
Normalizing process is：
1), feed：Using the special material frame of isothermal normalizing, will thick for the first time machine, ultrasound wave is lossless
Detect qualified wind-power spindle forging piece, with every two pieces wind-power spindle forging piece for a frame, and by two wind-powered electricity generations
The little axial end of main shaft is adjacent to and loads in material frame afterwards together, then will be equipped with the material of wind-power spindle forging piece
Frame pushes in the heating furnace of push-down isothermal normalizing furnace；
2), heat：4 thermals treatment zone, first thermal treatment zone are divided in the heating of push-down isothermal normalizing furnace
For preheating zone, second thermal treatment zone is intensification region, and the 3rd thermal treatment zone and the 4th thermal treatment zone are flat-temperature zone,
Wherein, the first thermal treatment zone design temperature be 830 ± 10 DEG C, the second thermal treatment zone design temperature be 880 ±
10 DEG C, the 3rd thermal treatment zone design temperature be 930 ± 5 DEG C, the 4th thermal treatment zone design temperature be 910 ±
5 DEG C, wind-power spindle forging piece was more than 1 hour in each thermal treatment zone time of staying；
3), cool down：After will be equipped with heating, the material frame of wind power principal axis pushes cooling chamber, and cooling adopts two sections
Formula cools down, and first paragraph is cooled to quickly cool down, using water spray fog cooling, by wind-power spindle forging piece 350
It is cooled to 760 ± 5 DEG C, second segment is cooled to air blast cooling within second, after water smoke cooling terminates,
Immediately air blast cooling is carried out to wind-power spindle forging piece using blower fan, by wind-power spindle forging piece in 600-1200
It is cooled to 620 ± 5 DEG C in second；
4), it is incubated：After will be equipped with cooling down, the material frame of wind power principal axis pushes heat preservation zone, and insulation divides into 4
Individual area, the first heat preservation zone design temperature is 640 ± 5 DEG C, and second, third heat preservation zone design temperature is
620 ± 5 DEG C, the 4th heat preservation zone design temperature is 600 ± 5 DEG C, and wind-power spindle forging piece is incubated at each
Area's time of staying is more than 1 hour；
5) discharging, after will be equipped with being incubated, the isothermal normalizing material frame of wind power principal axis pushes discharge zone, by wind-powered electricity generation
Main shaft is discharged in quenching material frame；
Step h, finished heat treatment：Quenching+tempering twice, concrete technology is：
Quench for the first time：
1), heat：By the wind-power spindle forging piece being discharged into after isothermal normalizing in quenching material frame and quenching material frame
Together put in quenching heating furnace, point two sections of heating, be warmed up to 720 ± 5 DEG C, be incubated 2-3 hour,
Then heat to 880 ± 5 DEG C, be incubated more than 5 hours；
2), quench：Water-cooled 320 ± 5 seconds, oil cooling afterwards to less than 250 DEG C；
Quench for second：
1), heat：Wind-power spindle forging piece after first time is quenched is put in quenching heating furnace, heats up
To 860 ± 5 DEG C, it is incubated more than 5 hours；
2), quench：Oil cooling to less than 250 DEG C；
Tempering：Wind-power spindle forging piece after second is quenched is put in tempering heating furnace in time, heats up
To 670 ± 5 DEG C, it is incubated more than 6 hours；
Step i, removing surface, second bright finish slightly machine, mechanical performance and metallographic structure sampling observation,
Ultrasonic Nondestructive is qualified, packaging and storage.
Invention beneficial effect
1st, electric furnace smelting+LF+VD+ vacuum casting is adopted to smelt steel ingot raw material, then by steel ingot former material
Material electroslag remelting, strictly controls each component content of steel ingot raw material, and decreases various miscellaneous
The content of prime element, and decrease the segregation of alloying element.
2nd, carry out couveuse slow cooling after forging molding, decrease the generation of non-equilibrium microstructure, beneficial to follow-up
Thick machining.
3rd, conditioning treatment adopts isothermal normalizing, improves the non-equilibrium microstructure after forging, for finally heat
Process and provide tissue to prepare；And, employ the isothermal normalizing technique of novelty：First in isothermal
Carried out thick machining before normalizing, forging any surface finish after machining, be conducive to the cooling of forging,
Secondly, it is adjacent to the mode that frames up together using by the little axial end of two wind power principal axis, can avoid little
Axle head too fast cooling in cooling, produces non-equilibrium microstructure, again, the cooling of isothermal normalizing is divided into
The quick cooling of water smoke and forced-air blast cools down two sections of coolings it is suppressed that the generation of pro-eutectoid ferrite, and
And bypassed Wei Shi body structural transformation region, so that each position of wind-power spindle forging piece is all obtained
Uniform statenchyma (pearlite+ferrite).
4th, finished heat treatment, using quenching+tempering technique twice, obtains uniformly tiny tempered sorbite
Tissue, improves every mechanical performance of wind-power spindle forging piece.
Brief description
Fig. 1 is a kind of schematic diagram of the 34CrNiMo6 wind power principal axis of low wind speed Wind turbines；
Fig. 2 is wind power principal axis manufacturing flow chart of the present invention.
Specific embodiment
As shown in Figure 1-2, a kind of 34CrNiMo6 wind power principal axis forging molding of low wind speed Wind turbines
Method, described wind power principal axis include flange portion and variable cross-section axle portion.
The 34CrNiMo6 wind power principal axis material composition of described low wind speed Wind turbines controls as follows：C
0.30%～0.37%, Si 0.30%～0.60%, Mn 0.60%～1.00%, Cr 1.40%～1.70%,
Ni 1.40%～1.70%, Mo 0.15%～0.35%, P<0.008%th, S<0.005%th, Cu<0.05%th,
As<0.005%th, Al<0.005%th, Sn<0.005%th, Sb<0.005%, remaining is Fe and can not keep away
The impurity exempted from.
The 34CrNiMo6 wind power principal axis method for forging and molding of described low wind speed Wind turbines specifically include with
Lower step：
Step a, selects to pour using electric furnace smelting+LF (external refining)+VD (vacuum degassing)+vacuum
The steel ingot raw material that casting is smelted；
Step b, by the steel ingot raw material electroslag remelting in step a；
Step c, blocking base：Electroslag remelting steel ingot is heated to 1250 ± 10 DEG C of initial forging temperature, protects
Temperature more than 5 hours, bar hold, chamfered edge, round as a ball, upset, pulling, pressure side, all directions, comprehensive
Oxygen blast is hindered clearly；
Step d, finish forging：The blank being obtained in step b is reheated to 1230 ± 10 DEG C,
Insulation more than 5 hours, round as a ball, the upset flange portion of cone-plate, extract each variable cross-section axle portion, mould finishing,
Gas cutting clamps handle；
Step e, couveuse is slowly cold, and finish forging gas cutting clamps afterwards, rapidly by wind-power spindle forging piece
Put in the couveuse with asbestos insulation material, and covered with insulation case lid so that wind power principal axis are forged
Part Slow cooling, reduces the generation of non-equilibrium microstructure, reduces hardness, is beneficial to machining；
Step f, machines thick for the first time, Ultrasonic Nondestructive；
Step g, conditioning treatment：Isothermal normalizing, described isothermal normalizing adopts push-down isothermal normalizing furnace,
Described isothermal normalizing furnace includes feeding area, the thermal treatment zone, cooling zone, heat preservation zone and discharge zone, isothermal
Normalizing process is：
1), feed：Using the special material frame of isothermal normalizing, will thick for the first time machine, ultrasound wave is lossless
Detect qualified wind-power spindle forging piece, with every two pieces wind-power spindle forging piece for a frame, and by two wind-powered electricity generations
The little axial end of main shaft is adjacent to and loads in material frame afterwards together, then will be equipped with the material of wind-power spindle forging piece
Frame pushes in the heating furnace of push-down isothermal normalizing furnace；
2), heat：4 thermals treatment zone, first thermal treatment zone are divided in the heating of push-down isothermal normalizing furnace
For preheating zone, second thermal treatment zone is intensification region, and the 3rd thermal treatment zone and the 4th thermal treatment zone are flat-temperature zone,
Wherein, the first thermal treatment zone design temperature be 830 ± 10 DEG C, the second thermal treatment zone design temperature be 880 ±
10 DEG C, the 3rd thermal treatment zone design temperature be 930 ± 5 DEG C, the 4th thermal treatment zone design temperature be 910 ±
5 DEG C, wind-power spindle forging piece was more than 1 hour in each thermal treatment zone time of staying；
3), cool down：After will be equipped with heating, the material frame of wind power principal axis pushes cooling chamber, and cooling adopts two sections
Formula cools down, and first paragraph is cooled to quickly cool down, using water spray fog cooling, by wind-power spindle forging piece 350
It is cooled to 760 ± 5 DEG C, second segment is cooled to air blast cooling within second, after water smoke cooling terminates,
Immediately air blast cooling is carried out to wind-power spindle forging piece using blower fan, by wind-power spindle forging piece in 600-1200
It is cooled to 620 ± 5 DEG C in second；
4), it is incubated：After will be equipped with cooling down, the material frame of wind power principal axis pushes heat preservation zone, and insulation divides into 4
Individual area, the first heat preservation zone design temperature is 640 ± 5 DEG C, and second, third heat preservation zone design temperature is
620 ± 5 DEG C, the 4th heat preservation zone design temperature is 600 ± 5 DEG C, and wind-power spindle forging piece is incubated at each
Area's time of staying is more than 1 hour；
5) discharging：After will be equipped with being incubated, the isothermal normalizing material frame of wind power principal axis pushes discharge zone, by wind-powered electricity generation
Main shaft is discharged in quenching material frame；
Step h, finished heat treatment：Quenching+tempering twice, concrete technology is：
Quench for the first time：
1), heat：By the wind-power spindle forging piece being discharged into after isothermal normalizing in quenching material frame and quenching material frame
Together put in quenching heating furnace, point two sections of heating, be warmed up to 720 ± 5 DEG C, be incubated 2-3 hour,
Then heat to 880 ± 5 DEG C, be incubated more than 5 hours；
2), quench：Water-cooled 320 ± 5 seconds, oil cooling afterwards to less than 250 DEG C；
Quench for second：
1), heat：Wind-power spindle forging piece after first time is quenched is put in quenching heating furnace, heats up
To 860 ± 5 DEG C, it is incubated more than 5 hours；
2), quench：Oil cooling to less than 250 DEG C；
Tempering：Wind-power spindle forging piece after second is quenched is put in tempering heating furnace in time, heats up
To 670 ± 5 DEG C, it is incubated more than 6 hours；
Step i, removing surface, second bright finish slightly machine, mechanical performance and metallographic structure sampling observation,
Ultrasonic Nondestructive is qualified, packaging and storage.
Above content is only the better embodiment of the present invention, for those of ordinary skill in the art,
According to the thought of the present invention, all will change in specific embodiments and applications, this theory
Bright book content should not be construed as limitation of the present invention.
Claims (5)
1. a kind of 34CrNiMo6 wind power principal axis method for forging and molding of low wind speed Wind turbines, described wind
Electro spindle include flange portion and variable cross-section axle portion it is characterised in that：Comprise the following steps：
Raw material is smelted, and step a, using electric furnace smelting+external refining+vacuum degassing+vacuum casting smelting
Steel-making ingot raw material；
Forging molding；
Thick machining for the first time, Ultrasonic Nondestructive；
Heat treatment；
Removing surface, second bright finish slightly machine, mechanical performance and metallographic structure sampling observation, ultrasonic
Ripple Non-Destructive Testing is qualified, packaging and storage.
2. a kind of 34CrNiMo6 wind power principal axis of low wind speed Wind turbines are forged as claimed in claim 1
Make forming method it is characterised in that：The 34CrNiMo6 wind power principal axis material of described low wind speed Wind turbines
Material Composition Control is as follows：C 0.30%～0.37%, Si 0.30%～0.60%, Mn 0.60%～1.00%,
Cr 1.40%～1.70%, Ni 1.40%～1.70%, Mo 0.15%～0.35%, P<0.008%th, S
<0.005%th, Cu<0.05%th, As<0.005%th, Al<0.005%th, Sn<0.005%th, Sb<0.005%,
Remaining is Fe and inevitable impurity.
3. a kind of 34CrNiMo6 wind power principal axis of low wind speed Wind turbines are forged as claimed in claim 1
Make forming method it is characterised in that：Described raw material smelting step also includes：
Step b, by the steel ingot raw material electroslag remelting in step a.
4. a kind of 34CrNiMo6 wind-powered electricity generation master of low wind speed Wind turbines as claimed in claim 2 or claim 3
Axle method for forging and molding it is characterised in that：Described forging molding step includes：
Step c, blocking base：Electroslag remelting steel ingot is heated to 1250 ± 10 DEG C of initial forging temperature, protects
Temperature more than 5 hours, bar hold, chamfered edge, round as a ball, upset, pulling, pressure side, all directions, comprehensive
Oxygen blast is hindered clearly；
Step d, finish forging：The blank being obtained in step b is reheated to 1230 ± 10 DEG C,
Insulation more than 5 hours, round as a ball, the upset flange portion of cone-plate, extract each variable cross-section axle portion, mould finishing,
Gas cutting clamps handle.
5. a kind of 34CrNiMo6 wind power principal axis of low wind speed Wind turbines are forged as claimed in claim 4
Make forming method it is characterised in that：In described step d, include after finish forging：
Step e, couveuse is slowly cold：Finish forging gas cutting clamps afterwards, rapidly by wind-power spindle forging piece
Put in the couveuse with asbestos insulation material, and covered with insulation case lid so that wind power principal axis are forged
Part Slow cooling, reduces the generation of non-equilibrium microstructure, reduces hardness, is beneficial to machining；
Step f, machines thick for the first time, Ultrasonic Nondestructive；
Step g, conditioning treatment：Isothermal normalizing, described isothermal normalizing adopts push-down isothermal normalizing furnace,
Described isothermal normalizing furnace includes feeding area, the thermal treatment zone, cooling zone, heat preservation zone and discharge zone, isothermal
Normalizing process is：
1) feed：Using the special material frame of isothermal normalizing, will thick for the first time machine, the lossless inspection of ultrasound wave
Survey qualified wind-power spindle forging piece, with every two pieces wind-power spindle forging piece for a frame, and by two wind-powered electricity generation masters
The little axial end of axle is adjacent to and loads in material frame afterwards together, then will be equipped with the material frame of wind-power spindle forging piece
Push in the heating furnace of push-down isothermal normalizing furnace；
2) heat：4 thermals treatment zone are divided in the heating of push-down isothermal normalizing furnace, and first thermal treatment zone is
Preheating zone, second thermal treatment zone is intensification region, and the 3rd thermal treatment zone and the 4th thermal treatment zone are flat-temperature zone,
Wherein, the first thermal treatment zone design temperature be 830 ± 10 DEG C, the second thermal treatment zone design temperature be 880 ±
10 DEG C, the 3rd thermal treatment zone design temperature be 930 ± 5 DEG C, the 4th thermal treatment zone design temperature be 910 ±
5 DEG C, wind-power spindle forging piece was more than 1 hour in each thermal treatment zone time of staying；
3) cool down：After will be equipped with heating, the material frame of wind power principal axis pushes cooling chamber, and cooling adopts two-part
Cooling, first paragraph is cooled to quickly cool down, using water spray fog cooling, by wind-power spindle forging piece 350
It is cooled to 760 ± 5 DEG C, second segment is cooled to air blast cooling within second, after water smoke cooling terminates,
Immediately air blast cooling is carried out to wind-power spindle forging piece using blower fan, by wind-power spindle forging piece in 600-1200
It is cooled to 620 ± 5 DEG C in second；
4) it is incubated：After will be equipped with cooling down, the material frame of wind power principal axis pushes heat preservation zone, and insulation divides into 4
Area, the first heat preservation zone design temperature is 640 ± 5 DEG C, and second, third heat preservation zone design temperature is 620
± 5 DEG C, the 4th heat preservation zone design temperature is 600 ± 5 DEG C, and wind-power spindle forging piece is in each heat preservation zone
The time of staying is more than 1 hour；
5) discharging：After will be equipped with being incubated, the isothermal normalizing material frame of wind power principal axis pushes discharge zone, by wind-powered electricity generation
Main shaft is discharged in quenching material frame；
Step h, finished heat treatment：Quenching+tempering twice, concrete technology is：
Quench for the first time：
1) heat：By the wind-power spindle forging piece being discharged into after isothermal normalizing in quenching material frame and quenching material frame one
With putting in quenching heating furnace, divide two sections of heating, be warmed up to 720 ± 5 DEG C, be incubated 2-3 hour, so
After be warming up to 880 ± 5 DEG C, be incubated more than 5 hours；
2) quench：Water-cooled 320 ± 5 seconds, oil cooling afterwards to less than 250 DEG C；
Quench for second：
1) heat：Wind-power spindle forging piece after first time is quenched is put in quenching heating furnace, is warming up to
860 ± 5 DEG C, it is incubated more than 5 hours；
2) quench：Oil cooling to less than 250 DEG C；
Tempering：Wind-power spindle forging piece after second is quenched is put in tempering heating furnace in time, heats up
To 670 ± 5 DEG C, it is incubated more than 6 hours；
Step i, removing surface, second bright finish slightly machine, mechanical performance and metallographic structure sampling observation,
Ultrasonic Nondestructive is qualified, packaging and storage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510478080.6A CN106425285A (en) | 2015-08-06 | 2015-08-06 | 34CrNiMo6 wind power main shaft forging forming method for low wind speed wind turbine set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510478080.6A CN106425285A (en) | 2015-08-06 | 2015-08-06 | 34CrNiMo6 wind power main shaft forging forming method for low wind speed wind turbine set |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109234499A (en) * | 2018-11-23 | 2019-01-18 | 河南中原特钢装备制造有限公司 | 25MnCrNi reinforces steel main shaft forging production method |
| CN109261869A (en) * | 2018-09-19 | 2019-01-25 | 无锡继平锻造有限公司 | A kind of forging and heat treatment process of crossover flange forging |
| CN114277223A (en) * | 2021-12-28 | 2022-04-05 | 江阴市恒业锻造有限公司 | Heat treatment method of high-low temperature impact toughness 10Ni3MoVD steel forging |
| CN115074502A (en) * | 2022-07-21 | 2022-09-20 | 太原科技大学 | Large-scale shaft forging and heat treatment process thereof |
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2015
- 2015-08-06 CN CN201510478080.6A patent/CN106425285A/en active Pending
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| CN109261869A (en) * | 2018-09-19 | 2019-01-25 | 无锡继平锻造有限公司 | A kind of forging and heat treatment process of crossover flange forging |
| CN109234499A (en) * | 2018-11-23 | 2019-01-18 | 河南中原特钢装备制造有限公司 | 25MnCrNi reinforces steel main shaft forging production method |
| CN114277223A (en) * | 2021-12-28 | 2022-04-05 | 江阴市恒业锻造有限公司 | Heat treatment method of high-low temperature impact toughness 10Ni3MoVD steel forging |
| CN114277223B (en) * | 2021-12-28 | 2023-09-29 | 江阴市恒业锻造有限公司 | Heat treatment method for high-low temperature impact toughness 10Ni3MoVD steel forging |
| CN115074502A (en) * | 2022-07-21 | 2022-09-20 | 太原科技大学 | Large-scale shaft forging and heat treatment process thereof |
| CN115074502B (en) * | 2022-07-21 | 2022-11-15 | 太原科技大学 | Large-scale shaft forging and heat treatment process thereof |
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Application publication date: 20170222 |