CN102806291B - Wind-powered main shaft forging method - Google Patents
Wind-powered main shaft forging method Download PDFInfo
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- CN102806291B CN102806291B CN201210304361.6A CN201210304361A CN102806291B CN 102806291 B CN102806291 B CN 102806291B CN 201210304361 A CN201210304361 A CN 201210304361A CN 102806291 B CN102806291 B CN 102806291B
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- 238000005242 forging Methods 0.000 title claims abstract description 187
- 238000000034 method Methods 0.000 title claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 238000005496 tempering Methods 0.000 claims abstract description 12
- 238000007689 inspection Methods 0.000 claims abstract description 10
- 238000004806 packaging method and process Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 52
- 239000010959 steel Substances 0.000 claims description 52
- 238000009413 insulation Methods 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 16
- 230000007115 recruitment Effects 0.000 claims description 11
- 238000003723 Smelting Methods 0.000 claims description 7
- 230000000994 depressogenic effect Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
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- 230000014759 maintenance of location Effects 0.000 claims description 4
- 238000007670 refining Methods 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 4
- 238000009849 vacuum degassing Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
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- 239000007787 solid Substances 0.000 claims description 2
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Abstract
The invention relates to a wind-powered main shaft forging method. The wind-powered main shaft forging method comprises the following steps of inspecting a material; heating the material; taking out a blank which is formed by annealing the material for the first time, pre-forging, upsetting, drawing and printing the blank, performing pre-forging to form the blank, and blanking; finally forging the blank to form a main shaft by annealing for the second time, forging a flange end on a hollow rotary worktable, and drawing the main shaft until a shaft body has forging size; performing re-crystallization normalized tempering thermal treatment by using a one-time thermal loading furnace after forging the wind-powered main shaft; roughly turning the wind-powered main shaft and detecting flaws through ultrasonic wave; hardening and tempering the wind-powered main shaft, and performing nondestructive inspection and physical and chemical inspection on the wind-powered main shaft; finely turning the wind-powered main shaft; and packaging the wind-powered main shaft. The wind-powered main shaft forging method provided by the invention has the characteristics that the efficiency is high, the energy is saved, the cost is reduced, and the forging quality is improved.
Description
Technical field
A kind of wind power principal axis forging method the present invention relates to, belongs to forging technical field.
Background technology
At present, along with wind-powered electricity generation industry is in develop rapidly and the maturation of China, the forging output of wind power principal axis has obtained very large raising at home.Nowadays the manufacture development trend of large-scale MW wind power principal axis is to maximization future development, and its forge weight is more and more heavier, and forging quality requirement is also more and more higher, and manufacturing and designing with forging method of wind power principal axis just had higher requirement.
What the wind power principal axis forging method of main flow still adopted now is traditional Forging Technology and forges after-baking technique.Adopt this forging mode to have following many deficiencies: to adopt traditional forging method, heating times is many, cause forging fire consumption to strengthen, combustion gas power consumption is large, forging time is long, and forging efficiency is low, and staff labor intensity is large, forge precision and can not get effective control, be unfavorable for the development trend of following energy-saving and emission-reduction.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of wind power principal axis forging method, and it is numerous and diverse that the method has overcome in traditional forging method process, and highly energy-consuming poor efficiency is forged the problems such as precision is not high, is conducive to the development trend of following energy-saving and emission-reduction.
A kind of wind power principal axis forging method of the present invention, it mainly comprises the following steps:
Step a, selects to adopt electric furnace smelting+LF (external refining)+VD(vacuum degassing) the steel ingot raw material smelted.
Step b, enters stove by steel ingot and is heated to 1240 ± 10 ° of C of initial forging temperature, and insulation is more than 10 hours;
Step c, the first fiery ejection blocking base:
Steel ingot in stove is taken out, use upper and lower flat anvil to steel ingot rising head side pressure jaw, then jaw is put into jumping-up drain cap hole, adopt the powerful jumping-up of press upper flat plate, now steel ingot jumping-up forging ratio is 2.2 ± 0.2, take out forging stock, manipulator clamping jaw, then adopt upper press plane, lower platform, adopt large plane cross to suppress jumping-up forging method, radially directly adopt large plane up and down to suppress the diameter base size of jumping-up to wind power principal axis flange end material to forging stock, forging stock half-twist, continue to suppress jumping-up by large plane up and down and forge and press the diameter base size to wind power principal axis flange end material.The now solid forging of forging stock is increased to 4.5～5 than, can forge completely and close steel ingot central defect, completes broken as-cast structure, forges and closes internal void defect, improves the forging quality of wind power principal axis axle.Then continue to use plane, lower platform, WHF forging method (wide anvil brute force is depressed forging method), by blank forging and stamping pulling, to from all directions, diameter dimension is the diameter base size of wind power principal axis flange end material.Then adopt upper and lower flat anvil, forging stock number is printed, point flange end material is long and axle body end material is long.Flange end material is carried out round as a ball, axle body end material goes out pin and pulls out the base size to spindle rod portion, and this bar portion diameter dimension need be less than circular rotating workbench patrix circle internal diameter 20～30mm, and earnestly jaw, enters stove and be heated to 1220 ° of C ± 10 ° C, and insulation is more than 3 hours;
Steps d, the second fiery finish forging:
Being swaged in advance T-shaped forging, hang in hollow rotary table with driving a vehicle, adopt the maximum forging pressure of press directly flange end material to be suppressed to jumping-up with press upper mounting plate; Then adopt upper flat anvil that flange end material is rotated and forged and pressed to forging ' s block dimension height, smooth; Take out forging stock, manipulator clamping wind-electricity shaft small end, flat anvil in employing, lower platform forging method carries out round as a ball, smooth to flange end external diameter; Then manipulator clamping flange end, adopts upper and lower flat anvil, and axle body forging is arrived to forging ' s block dimension; Complete forging.
Step e, air cooling, carries out a hot charging stove positive tempering heat treatment that is recrystallized to workpiece.
Step f, carries out roughing, and forging carries out 100% nondestructive inspection detection to forging after seeing light.
Step g, modified, mechanical performance, metallographic, hardness detects, nondestructive inspection, finish turning, packaging.
As improvement, the Heating Steel Ingots method of described step b is divided into hot steel ingot processing technology and cold Heating Steel Ingots technique, and detailed process is:
1) hot Heating Steel Ingots technique: the surface temperature of sending for steel plant's heat is greater than the steel ingot of 400 ° of C and regards as hot steel ingot, its heating process is: under ° C furnace temperature of 700 ° of C～750, be incubated more than 3 hours, be warming up to initial forging temperature by heating furnace peak power again, insulation;
2) cold Heating Steel Ingots technique: the steel ingot that is less than 400 ° of C for surface temperature is regarded as cold steel ingot, its heating process is: be first encased in the hot stove of the highest shove charge furnace temperature lower than 400 ° of C, under charging temperature, be incubated more than 4 hours, then be heated to 850 ± 10 ° of C, temperature recruitment per hour is less than 60 ° of C, be incubated again more than 6 hours, then be warming up to initial forging temperature by heating furnace peak power, insulation.
As improvement, large plane cross in described step c is suppressed jumping-up forging method, carry out large plane cross suppress jumping-up forge time, now the ratio of height to diameter of forging (H/D) is less than 1, so that the σ r of forging heart portion and σ θ are converted into compression by tension, make forging heart portion in three-dimensional compressive stress state, and can increase to greatest extent the forging ratio of forging stock.Can better forge and close steel ingot central defect, complete broken as-cast structure, forge and close internal void defect, improve the forging quality of wind power principal axis.
As improvement, the hollow rotary table in described steps d; The center of turntable is hollow, and described turntable is hollow turntable base by bottom, and top is made up of the mould circle at the identical packing ring of internal-and external diameter and top, and the chamfering R value of this mould circle need be greater than the chamfering R value of wind power principal axis flange end.Because adopting the mould circle of large chamfering R, in the time carrying out the second fire forging, when press upper mounting plate is suppressed forging to flange end material, the mould circle of large chamfering R can reduce press vertical direction the shearing stress at forging stock center is concentrated, reduce blank downward displacement in vertical direction in the time of forging and stamping flange end, thereby effectively raise the forging precision of forging.
As improvement, the positive tempering heat treatment that is recrystallized of a hot charging stove in described step e, workpiece stove is cooled to 550 ° of C ± 20 ° C outward, enter stove insulation 3-4 hour, be heated to again 930 ± 10 ° of C, temperature recruitment per hour is less than 80 DEG C/h, be incubated 12 hours, then come out of the stove, evenly force blast-cold with air blast, make forging hull-skin temperature evenly be cooled to 300 ± 20 ° of C, enter again stove insulation, temperature retention time is no less than 6 hours, then be heated to 650 ± 10 ° of C, in temperature-rise period, temperature recruitment per hour is less than 80 ° of C/ hour, be incubated 15 hours, cooling with stove again, control forging temperature drop per hour and be less than or equal to 40 ° of C, treat that forging drops to 400 ° of C left and right, continue to control forging cooling rate and be less than 20 ° of C/ hour, when forging stove is chilled to 150 ° below C, forging can be come out of the stove cooling.
The invention has the beneficial effects as follows: high-efficiency and energy-saving type wind power principal axis forging method of the present invention, the forging strict forging quality requirement that the first fiery blocking base has just been guaranteed, has just reduced forging process, saves forging time, has reduced forging fire consumption; The second fire adopts forge and press flange end on large chamfering R value mould circle time, effectively controlled the downward displacement in vertical direction of forging stock blank, improved the forging precision of forging; The positive tempering heat treatment process that is once recrystallized adopting after forging replaces need in the past to adopt the Technology for Heating Processing of twice positive tempering of recrystallization, save a large amount of combustion gas power consumptions, and improve operating efficiency, greatly reduce workman's labour intensity and production cost, improve the forging quality of wind power principal axis, realized the road for development of wind power principal axis high-efficiency and energy-saving type.
Brief description of the drawings
Fig. 1 is the cold Heating Steel Ingots artwork of the present invention.
Fig. 2 is that heat of the present invention is sent hot Heating Steel Ingots artwork.
Fig. 3 is a forging hot charging stove carrying out after the present invention the forges positive tempering heat treatment process figure that is recrystallized.
When Fig. 4 is forging One-time forging of the present invention, forging adopts large plane cross to suppress jumping-up forging method and forges rear schematic diagram.
When Fig. 5 is forging the second fire forging of the present invention, flange end is forging and stamping distortion schematic diagram on the mould circle of large chamfering rotary table.
Fig. 6 is the forging finished product schematic diagram of the embodiment of the present invention 1.
Fig. 7 is the forging finished product schematic diagram of the embodiment of the present invention 2.
Detailed description of the invention
Below in conjunction with accompanying drawing 1-7 and specific embodiments, the present invention is described in further detail:
Embodiment 1
The Forging Technology of 1.5MW wind power principal axis, comprises step:
A, the steel ingot of selecting must be to adopt electric furnace smelting+LF (external refining)+VD(vacuum degassing) the steel ingot raw material smelted of smelting process.Selecting material is 34CrNiMo6, meets DIN EN 10083-3, ensures S≤0.15%, P≤0.20%, wherein [H]≤2.0ppm; [O]≤25ppm.To raw material steel ingot, steel mill carries out hot steel ingot heat by " steel ingot heat fortune code " and send.
B, according to Fig. 2, adopt steel mill heat to send and transport the hot steel ingot that the surface temperature of coming is greater than 400 ° of C, its heating process is: under ° C furnace temperature of 700 ° of C～750, be incubated more than 3 hours, be warmed up to 1240 ± 10 ° of C by heating furnace peak power again, insulation is more than 10 hours;
C, according to Fig. 4, the first fiery ejection blocking base.Steel ingot in stove is taken out, use upper and lower flat anvil to steel ingot rising head side pressure jaw, 650*600mm, then jaw is put into jumping-up drain cap hole, adopt the powerful jumping-up of press upper flat plate, by effective steel ingot ingot height degree H2140mm jumping-up, to H900mm, now jumping-up forging ratio is 2.2.Take out forging stock, manipulator clamping vice jaw part, then adopt upper press flat board, lower platform, adopts large plane cross to suppress jumping-up forging method, and forging is is radially directly forged and pressed to the diameter base size H1150mm to wind power principal axis flange end material, forging half-twist, continue to forge and press the diameter base size H1150mm to wind power principal axis flange end material with large plane upsetting, suppress jumping-up forge through this large plane cross of twice, the forging ratio of forging increases to 4.6.Then continue to use plane, lower platform, WHF forging method (wide anvil brute force is depressed forging method), forging is depressed into #1150*1500mm from all directions.Now adopt upper and lower flat anvil, forging stock number is printed, sub-material, flange end forging ' s block dimension is that all directions #1150*540mm and axle body section forging ' s block dimension #1150*960mm. are round as a ball to 1150 to flange end material, axle body section is expected pin and is pulled out to 750, earnestly jaw.Enter stove and be heated to 1220 ° of C ± 10 ° C, insulation is more than 3 hours.
D, according to Fig. 5, the second fiery finish forging.Being swaged in advance T-shaped forging, hang in hollow rotary table with driving a vehicle.Suppress jumping-up to H350mm with press upper mounting plate, then adopt upper flat anvil to rotate forging and stamping, smooth flange end to H280mm to flange end material.In mould, take out forging stock, manipulator clamping wind-electricity shaft small end, flat anvil in employing, lower platform forging method carries out round as a ball, smooth to flange end external diameter, become forging ' s block dimension 1540*280mm.Then manipulator clamping flange end, adopts upper and lower flat anvil, and axle body is forged into forging ' s block dimension, completes forging.
E, is cooled to 550 ° of C left and right to workpiece air cooling, enters stove insulation, only need carry out the positive tempering that is recrystallized of a hot charging stove.
According to Fig. 3, a described hot charging stove positive tempering heat treatment that is recrystallized, workpiece stove is cooled to 550 ° of C ± 20 ° C outward, enter stove insulation 3-4 hour, be heated to again 930 ± 10 ° of C, temperature recruitment per hour is less than 80 DEG C/h, be incubated 12 hours, then come out of the stove, evenly force blast-cold with air blast, make forging hull-skin temperature evenly be cooled to 300 ± 20 ° of C, enter again stove insulation, temperature retention time is no less than 6 hours, then be heated to 650 ± 10 ° of C, in temperature-rise period, temperature recruitment per hour is less than 80 ° of C/ hour, be incubated 15 hours, cooling with stove again, control forging temperature drop per hour and be less than or equal to 40 ° of C, treat that forging drops to 400 ° of C left and right, continue to control forging cooling rate and be less than 20 ° of C/ hour, when forging stove is chilled to 150 ° below C, forging can be come out of the stove cooling.Whole heat treatment cycle curve can adopt moisture recorder to draw online temperature curve.
F, carries out roughing, and forging carries out 100% nondestructive inspection detection to forging after seeing light.
G, carry out modified, mechanical performance, metallographic, hardness detect, nondestructive inspection, finish turning, packaging.
Forging trimmed size of the present invention as shown in Figure 6.
Embodiment 2
The forging method of 2MW wind power principal axis, comprises step:
A, the steel ingot of selecting must be to adopt electric furnace smelting+LF (external refining)+VD(vacuum degassing) the steel ingot raw material smelted of smelting process.Selecting material is 42CrMo4, according to the requirement of standard SEW550-1976,0.40%≤C≤0.45%, Si≤0.40%, 0.60%≤Mn≤0.80%, S≤0.15%, P≤0.20%, 1.00%≤Cr≤1.20%, 0.45%≤Ni≤0.60%, 0.18%≤Mo≤0.30%, wherein [H]≤2.0ppm; [O]≤25ppm.
B, according to Fig. 1, to adopt cold Heating Steel Ingots technique for cold steel ingot: the steel ingot that surface temperature is less than to 400 ° of C is encased in the hot stove of the highest shove charge furnace temperature lower than 400 ° of C, under charging temperature, be incubated more than 4 hours, then be heated to 850 ± 10 ° of C, temperature recruitment per hour is less than 60 ° of C, then is incubated more than 6 hours, be warming up to 1240 ± 10 ° of C by heating furnace peak power again, insulation is more than 10 hours.
C, the first fiery ejection blocking base.Steel ingot in stove is taken out, use upper and lower flat anvil to steel ingot rising head side pressure jaw, 650*600mm, then jaw is put into jumping-up drain cap hole, adopt the powerful jumping-up of press upper flat plate, by effective steel ingot ingot height degree H2380mm jumping-up, to H1000mm, now jumping-up forging ratio is 2.4.Take out forging stock, manipulator clamping vice jaw part, then adopt upper press flat board, lower platform, adopts large plane cross to suppress jumping-up forging method, and forging is is radially directly forged and pressed to the diameter base size H1200mm to wind power principal axis flange end material, forging half-twist, continue to forge and press the diameter base size H1200mm to wind power principal axis flange end material with large plane upsetting, suppress jumping-up forge through this large plane cross of twice, the forging ratio of forging increases to 4.9.Then continue to use plane, lower platform, WHF forging method (wide anvil brute force is depressed forging method), forging is depressed into #1200*1750mm from all directions.Then adopt upper and lower flat anvil, forging stock number is printed, sub-material, flange end forging ' s block dimension is that #1200*580mm and axle body section forging ' s block dimension #1200*1170mm. are round as a ball to 1200 to flange end material, axle body section is expected pin and is pulled out to 900, earnestly jaw.Enter stove and be heated to 1220 ° of C ± 10 ° C, insulation is more than 3 hours.
D, the second fiery finish forging.Being swaged in advance T-shaped forging, hang in hollow rotary table with driving a vehicle.Suppress jumping-up to H380mm with press upper mounting plate, then adopt upper flat anvil to rotate forging and stamping, smooth flange end to H250mm to flange end material.In mould, take out forging stock, manipulator clamping wind-electricity shaft small end, flat anvil in employing, lower platform forging method carries out round as a ball, smooth to flange end external diameter, become forging ' s block dimension 1730*250mm.Then manipulator clamping flange end, adopts upper and lower flat anvil, and axle body is forged into forging ' s block dimension, completes forging.
E, is cooled to 550 ° of C left and right to workpiece air cooling, enters stove insulation, only need carry out the positive tempering that is recrystallized of a hot charging stove.
According to Fig. 3, a described hot charging stove positive tempering heat treatment that is recrystallized, workpiece stove is cooled to 550 ° of C ± 20 ° C outward, enter stove insulation 3-4 hour, be heated to again 930 ± 10 ° of C, temperature recruitment per hour is less than 80 DEG C/h, be incubated 12 hours, then come out of the stove, evenly force blast-cold with air blast, make forging hull-skin temperature evenly be cooled to 300 ± 20 ° of C, enter again stove insulation, temperature retention time is no less than 6 hours, then be heated to 650 ± 10 ° of C, in temperature-rise period, temperature recruitment per hour is less than 80 ° of C/ hour, be incubated 15 hours, cooling with stove again, control forging temperature drop per hour and be less than or equal to 40 ° of C, treat that forging drops to 400 ° of C left and right, continue to control forging cooling rate and be less than 20 ° of C/ hour, when forging stove is chilled to 150 ° below C, forging can be come out of the stove cooling.Whole heat treatment cycle curve can adopt moisture recorder to draw online temperature curve.
F, carries out roughing, and forging carries out 100% nondestructive inspection detection to forging after seeing light.
G, carry out modified, mechanical performance, metallographic, hardness detect, nondestructive inspection, finish turning, packaging.
Forging trimmed size of the present invention as shown in Figure 7.
The invention of this reality provides a kind of forging method of wind power principal axis; concrete application approach is a lot; the above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvement, these improve and also should be considered as protection scope of the present invention.
Claims (1)
1. a wind power principal axis forging method, is characterized in that there are following steps:
Step a, adopts the steel ingot of electric furnace smelting+external refining+vacuum degassing smelting as raw material;
Step b, enters stove by steel ingot and is heated to 1240 ± 10 ° of C of initial forging temperature, and insulation is more than 10 hours; Be divided into hot steel ingot processing technology and cold Heating Steel Ingots technique, detailed process is:
1) hot Heating Steel Ingots technique: the surface temperature of sending for steel plant's heat is greater than the steel ingot of 400 ° of C and regards as hot steel ingot, its heating process is: under ° C furnace temperature of 700 ° of C～750, be incubated more than 3 hours, be warming up to initial forging temperature by heating furnace peak power again, insulation;
2) cold Heating Steel Ingots technique: the steel ingot that is less than 400 ° of C for surface temperature is regarded as cold steel ingot, its heating process is: be first encased in the hot stove of the highest shove charge furnace temperature lower than 400 ° of C, under charging temperature, be incubated more than 4 hours, then be heated to 850 ± 10 ° of C, temperature recruitment per hour is less than 60 ° of C, be incubated again more than 6 hours, then be warming up to initial forging temperature by heating furnace peak power, insulation;
Step c, the first fiery ejection blocking base:
Steel ingot in stove is taken out, use upper and lower flat anvil to steel ingot rising head side pressure jaw, then jaw is put into jumping-up drain cap hole, adopted the powerful jumping-up of press upper flat plate, now steel ingot jumping-up forging ratio is 2.2 ± 0.2, take out forging stock, manipulator clamping jaw, then adopts upper press plane, lower platform, adopt large plane cross to suppress jumping-up forging method, radially directly adopt large plane up and down to suppress the diameter base size of jumping-up to wind power principal axis flange end material to forging stock, forging stock half-twist afterwards, continue to suppress jumping-up by large plane up and down and forge and press the diameter base size to wind power principal axis flange end material, the now solid forging of forging stock is increased to 4.5～5 than, then continue to use plane, lower platform, wide anvil brute force is depressed forging method, by blank forging and stamping extremely from all directions, diameter dimension is the diameter base size of wind power principal axis flange end material, then on adopting, lower flat anvil, forging stock number is printed, divide flange end material length and axle body end material long, carry out round as a ball to flange end material, axle body end material goes out pin and pulls out the base size to spindle rod portion, this bar portion diameter dimension need be less than circular rotating workbench patrix circle internal diameter 20～30mm, earnestly otch, enter stove and be heated to 1220 ° of C ± 10 ° C, insulation is more than 3 hours,
Steps d, the second fiery finish forging:
Being swaged in advance T-shaped forging, hang in hollow rotary table with driving, the center of this rotary table is hollow, described rotary table bottom is hollow turntable base, top is made up of the mould circle at the identical packing ring of internal-and external diameter and top, and the chamfering R value of this mould circle need be greater than the chamfering R value of wind power principal axis flange end; Adopt the maximum forging pressure of press, directly flange end material is suppressed to jumping-up with press upper mounting plate; Then adopt upper flat anvil that flange end material is rotated and forged and pressed to forging ' s block dimension height, smooth; Take out forging stock, manipulator clamping wind-electricity shaft small end, flat anvil in employing, lower platform forging method carries out round as a ball, smooth to flange end external diameter; Then manipulator clamping flange end, adopts upper and lower flat anvil, and axle body forging is arrived to forging ' s block dimension; Complete forging;
Step e, air cooling, carries out a hot charging stove positive tempering heat treatment that is recrystallized to workpiece, detailed process is: workpiece stove is cooled to 550 ° of C ± 20 ° C outward, enter stove insulation 3-4 hour, be heated to again 930 ± 10 ° of C, temperature recruitment per hour is less than 80 DEG C/h, be incubated 12 hours, then come out of the stove, evenly force blast-cold with air blast, make forging hull-skin temperature evenly be cooled to 300 ± 20 ° of C, enter again stove insulation, temperature retention time is no less than 6 hours, then be heated to 650 ± 10 ° of C, in temperature-rise period, temperature recruitment per hour is less than 80 ° of C/ hour, be incubated 15 hours, cooling with stove again, control forging temperature drop per hour and be less than or equal to 40 ° of C, treat that forging drops to 400 ° of C left and right, continue to control forging cooling rate and be less than 20 ° of C/ hour, when forging stove is chilled to 150 ° below C, forging can be come out of the stove cooling,
Step f, carries out roughing, and forging carries out 100% nondestructive inspection detection to forging after seeing light;
Step g, modified, mechanical performance, metallographic, hardness detects, nondestructive inspection, finish turning, packaging.
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| CN201210304361.6A CN102806291B (en) | 2012-08-24 | 2012-08-24 | Wind-powered main shaft forging method |
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| CN201210304361.6A CN102806291B (en) | 2012-08-24 | 2012-08-24 | Wind-powered main shaft forging method |
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| CN102806291B true CN102806291B (en) | 2014-07-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812645A (en) * | 2010-04-02 | 2010-08-25 | 张家港海陆环形锻件有限公司 | Ring forge piece material of wind power rotary supporting ring and ring forge piece manufacturing technology thereof |
| CN102615478A (en) * | 2012-02-28 | 2012-08-01 | 杭州荣力铸锻有限公司 | Forging process of wind power main shaft |
-
2012
- 2012-08-24 CN CN201210304361.6A patent/CN102806291B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812645A (en) * | 2010-04-02 | 2010-08-25 | 张家港海陆环形锻件有限公司 | Ring forge piece material of wind power rotary supporting ring and ring forge piece manufacturing technology thereof |
| CN102615478A (en) * | 2012-02-28 | 2012-08-01 | 杭州荣力铸锻有限公司 | Forging process of wind power main shaft |
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