CN107858590B - A kind of 42CrMo4 wind driven generator principal shaft control method - Google Patents
A kind of 42CrMo4 wind driven generator principal shaft control method Download PDFInfo
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- CN107858590B CN107858590B CN201710975697.8A CN201710975697A CN107858590B CN 107858590 B CN107858590 B CN 107858590B CN 201710975697 A CN201710975697 A CN 201710975697A CN 107858590 B CN107858590 B CN 107858590B
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 238000005242 forging Methods 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 238000002791 soaking Methods 0.000 claims description 21
- 238000005496 tempering Methods 0.000 claims description 14
- 238000010791 quenching Methods 0.000 claims description 13
- 230000000171 quenching effect Effects 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical group [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000000137 annealing Methods 0.000 claims description 8
- 229910001562 pearlite Inorganic materials 0.000 claims description 7
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 7
- 150000002910 rare earth metals Chemical class 0.000 claims description 7
- 238000007670 refining Methods 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 5
- 239000004615 ingredient Substances 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000010813 municipal solid waste Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 12
- 239000000203 mixture Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007920 subcutaneous administration Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 6
- 239000000470 constituent Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/28—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for plain shafts
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention relates to material composition design and Field of Heat-treatment, more particularly to a kind of high-performance 42CrMo4 wind driven generator principal shaft control method.By weight percentage, the chemical composition ranges of 42CrMo4 wind driven generator principal shaft are as follows: C:0.39~0.42%；Si:0.20~0.30%；Mn:0.70~0.80%；Cr:1.10~1.20%；Mo:0.25~0.30%；Cu :≤0.10%；Al :≤0.05%；P :≤0.012%；S :≤0.008%, surplus Fe.The present invention is added by microalloy, the processing of molten steel sublimate and forging, heat-treated sturcture control, the 42CrMo4 blower fan main shaft of manufacture is finally set to obtain good tough matching degree, performance reaches at subcutaneous 185mm: yield strength (Re) >=525MPa, tensile strength (Rm) >=680MPa, elongation (A) >=16%, -30 DEG C of ballistic work (AKv) >=27J.
Description
Technical field
The present invention relates to material composition design and Field of Heat-treatment, send out more particularly to a kind of high-performance 42CrMo4 wind-force
Electric machine main shaft control method.
Background technique
Wind driven generator principal shaft is the key components and parts for connecting blade and generator, and working environment is complicated, is needed good
Obdurability matching.In recent years, blower was also increased accordingly in enlarged development trend, the specification of main shaft, and organizational controls difficulty increases
Add, along with mechanical performance index requires higher and higher, performance requirement at subcutaneous 185mm are as follows: yield strength >=525MPa, tension
Intensity >=680Mpa, -30 DEG C of Impact energy Ak v >=27J, existing manufacturing process can not meet technical requirements.
Summary of the invention
The purpose of the present invention is to provide a kind of high-performance 42CrMo4 wind driven generator principal shaft control methods, make 42CrMo4
Blower fan main shaft can have good tough matching degree, be wanted with meeting use of the Wind turbines in low temperature complex work environment
It asks.
The technical scheme is that
A kind of 42CrMo4 wind driven generator principal shaft control method, which is characterized in that under basic 42CrMo4 member condition
Carry out microalloy adjustment；In original smelting pouring technology: electric furnace+LF+VD+ carries out low being mingled with control under conditions of molding；Using
Forging+annealing+normalizing guarantees that grain size is greater than 7 grades；Guarantee that matrix meets product using alternately water quenching+tempering process
Can: yield strength Re >=525MPa, tensile strength Rm >=680MPa, elongation A >=16%, -30 DEG C of ballistic work AKv >=27J.
The 42CrMo4 wind driven generator principal shaft control method, 42CrMo4 wind driven generator principal shaft material composition and its
Weight percentage is C:0.39~0.42%；Si:0.20~0.30%；Mn:0.70~0.80%；Cr:1.10~
1.20%；Mo:0.25~0.30%；Cu :≤0.10%；Al :≤0.05%；P :≤0.012%；S :≤0.008%, surplus is
Fe。
The 42CrMo4 wind driven generator principal shaft control method, the 42CrMo4 wind driven generator principal shaft material of optimization at
In point, microalloy element Ni:0.35~0.60% is added；V:0.1~0.3%；RE≤0.025%；Wherein, guarantee Ni+V >
0.55%.
The 42CrMo4 wind driven generator principal shaft control method, in original smelting pouring technology: electric furnace+LF+VD+ mould
Carried out under conditions of casting it is low be mingled with control, in conjunction with slag steel balance control and pass through after LF refining add rare earth treatment realize；
Selected refining slag system is aluminium oxide >=20wt%, silica≤12wt%, and rare earth adding quantity≤0.025wt% presss from both sides A, C
Sundries Type Control≤0.5 grade, by Control and Inclusion Removal≤1 grade B, D.
The 42CrMo4 wind driven generator principal shaft control method guarantees that grain size is greater than 7 using forging+annealing+normalizing
Grade, in which: upset ratio is greater than 5, keeps the temperature 20~25 hours at 800~900 DEG C after main shaft is forged, then carries out pearlite and moves back
Fire keeps the temperature 20~30 hours at 700~750 DEG C, improves even grain size, eliminates mixed crystal；Later, at using double normalizing
Reason, 800~900 DEG C of double normalizing temperature, soaking time 20~25 hours.
The 42CrMo4 wind driven generator principal shaft control method guarantees matrix group using alternately water quenching+tempering process
It knits and meets properties of product, in which: in quenching technical, 840~890 DEG C of hardening heat, soaking time 20~25 hours, using friendship
For water quenching mode, and the entire hardening process cooling rate of main shaft is controlled using contact whole process real-time cooling speed control method
System；In tempering process, 645~665 DEG C of tempering temperature, soaking time 25~30 hours.
The 42CrMo4 wind driven generator principal shaft control method, in quenching technical, 42CrMo4 wind driven generator principal
Axis enters coolant-temperature gage control at 840~900 DEG C.
The each Design of Chemical Composition thought and synergistic effect of high-performance 42CrMo4 wind driven generator principal shaft material of the present invention
It is: is deployed by constituent contents such as C, Cr, Mn, Ni, Mo, understands the relationship between constituent content and material harden ability, intensity；It is logical
The allotment of the constituent contents such as C, Ni, V is crossed, the relationship between element and toughness of material is understood；Pass through the allotment of microelement V and rare earth
Have the function that refine crystal grain, the control of deoxidation is realized by the control of Si, Al content.
The heat treatment mechanism of high-performance 42CrMo4 wind driven generator principal shaft material of the present invention is: utilizing the lamella of pearlite
Structure provides forming core point for austenite grain, improves number of nuclei, refines even grained.
The invention has the advantages and beneficial effects that:
1, the present invention develops a kind of high property by spindle material optimizing components and choosing special thermal treatment technique study
Energy 42CrMo4 blower fan main shaft material, can satisfy requirement of the Wind turbines in low temperature complex work environment.Its performance is enough
Meet: yield strength >=525MPa, tensile strength >=680MPa, elongation percentage >=16%, -30 DEG C of ballistic work (AKv) >=27J.
2, the steel grade of the invention performance after pearlite annealing, modifier treatment is stablized, and can be used in great key components and parts
On.
3, heat treatment method of the present invention can be widely applied to the heat treatment of 42CrMo4 wind driven generator principal shaft product.
Specific embodiment
In the specific implementation process, the smelting process of high-performance 42CrMo4 wind driven generator principal shaft material of the present invention, in original
Have carried out under the conditions of smelting pouring technology (electric furnace+LF+VD+ molding) it is low be mingled with control, mainly in combination with slag steel balance control and
It is realized by adding rare earth treatment after LF refining.Selected refining slag system be aluminium oxide >=20%, silica≤12%,
Rare earth adding quantity≤0.025%, effect can be effectively by A, C field trash Type Control≤0.5 grade, by B, D Control and Inclusion Removal
≤ 1 grade；
In the following, by embodiment, invention is further described in detail.
Embodiment 1
In the present embodiment, the cast steel ingredient of high-strength high-toughness and low-temperature military service cast steel material is as follows:
| Element | Content (wt%) |
| C | 0.41 |
| Si | 0.25 |
| Mn | 0.73 |
| P | 0.01 |
| S | 0.001 |
| Ni | 0.53 |
| Cr | 1.12 |
| Mo | 0.26 |
| V | 0.2 |
| Al | 0.017 |
| Cu | 0.04 |
| RE | 0.016 |
| Fe | Surplus |
Heat treatment uses following steps: being kept the temperature after 1. main shaft is forged at 860 DEG C, soaking time is thick by 1h/25mm
Selected, later in 730 DEG C of progress pearlite annealings, soaking time is selected by 1h/25mm thickness.2. then main shaft carries out twice just
Fire processing, normalizing temperature is 860 DEG C, and soaking time is selected by 1h/25mm thickness, is then come out of the stove air-cooled to 300 DEG C or less.3. so
Main shaft is quenched afterwards, using alternately water quenching mode, and using contact whole process real-time cooling speed control method to master
The entire hardening process cooling rate of axis is controlled, and it is 850 DEG C that main shaft, which enters coolant-temperature gage, and soaking time presses 1h/25mm.4. tempering temperature is selected
650 DEG C are selected as, soaking time presses 1h/25mm, comes out of the stove after tempering and is air-cooled to room temperature.
After heat treatment, material property is as follows:
Yield strength (Re) is 661MPa, and tensile strength (Rm) is 822MPa, and elongation (A) is 19%, -30 DEG C of ballistic works
It (AKv) is 33J.
Embodiment 2
In the present embodiment, the cast steel ingredient of high-strength high-toughness and low-temperature military service cast steel material is as follows:
| Element | Content (wt%) |
| C | 0.41 |
| Si | 0.27 |
| Mn | 0.79 |
| P | 0.011 |
| S | 0.006 |
| Ni | 0.46 |
| Cr | 1.10 |
| Mo | 0.27 |
| V | 0.25 |
| Al | 0.01 |
| Cu | 0.08 |
| RE | 0.011 |
| Fe | Surplus |
Heat treatment uses following steps: being kept the temperature after 1. main shaft is forged at 860 DEG C, soaking time is thick by 1h/25mm
Selected, later in 750 DEG C of progress pearlite annealings, soaking time is selected by 1h/25mm thickness.2. then main shaft carries out twice just
Fire processing, normalizing temperature is 880 DEG C, and soaking time is selected by 1h/25mm thickness, is then come out of the stove air-cooled to 300 DEG C or less.3. so
Main shaft is quenched afterwards, using alternately water quenching mode, and using contact whole process real-time cooling speed control method to master
The entire hardening process cooling rate of axis is controlled, and it is 869 DEG C that main shaft, which enters coolant-temperature gage, and soaking time presses 1h/25mm.4. tempering temperature is selected
660 DEG C are selected as, soaking time presses 1h/25mm, comes out of the stove after tempering and is air-cooled to room temperature.
After heat treatment, material property is as follows:
Yield strength (Re) is 689MPa, and tensile strength (Rm) is 860MPa, and elongation (A) is 18%, -30 DEG C of ballistic works
It (AKv) is 30J.
Embodiment 3
In the present embodiment, the cast steel ingredient of high-strength high-toughness and low-temperature military service cast steel material is as follows:
| Element | Content (wt%) |
| C | 0.42 |
| Si | 0.22 |
| Mn | 0.75 |
| P | 0.008 |
| S | 0.003 |
| Ni | 0.57 |
| Cr | 1.13 |
| Mo | 0.25 |
| V | 0.18 |
| Al | 0.022 |
| Cu | 0.10 |
| RE | 0.020 |
| Fe | Surplus |
Heat treatment uses following steps: being kept the temperature after 1. main shaft is forged at 860 DEG C, soaking time is thick by 1h/25mm
Selected, later in 710 DEG C of progress pearlite annealings, soaking time is selected by 1h/25mm thickness.2. then main shaft carries out twice just
Fire processing, normalizing temperature is 890 DEG C, and soaking time is selected by 1h/25mm thickness, is then come out of the stove air-cooled to 300 DEG C or less.3. so
Main shaft is quenched afterwards, using alternately water quenching mode, and using contact whole process real-time cooling speed control method to master
The entire hardening process cooling rate of axis is controlled, and it is 876 DEG C that main shaft, which enters coolant-temperature gage, and soaking time presses 1h/25mm.4. tempering temperature is selected
645 DEG C are selected as, soaking time presses 1h/25mm, comes out of the stove after tempering and is air-cooled to room temperature.
After heat treatment, material property is as follows:
Yield strength (Re) is 641MPa, and tensile strength (Rm) is 828MPa, and elongation (A) is 19%, -30 DEG C of ballistic works
It (AKv) is 31J.
Embodiment the result shows that, the 42CrMo4 wind driven generator principal shaft material involved in the present invention arrived after heat treatment, can
To reach technical requirements, requirement of the Wind turbines in low temperature complex work environment can satisfy.
Claims (6)
1. a kind of 42CrMo4 wind driven generator principal shaft control method, which is characterized in that under basic 42CrMo4 member condition into
The adjustment of row microalloy；In original smelting pouring technology: electric furnace+LF+VD+ carries out low being mingled with control under conditions of molding；Using forging
Make+anneal+normalizing guarantee grain size be greater than 7 grades；Guarantee that matrix meets product using alternately water quenching+tempering process
Can: yield strength Re >=525MPa, tensile strength Rm >=680MPa, elongation A >=16%, -30 DEG C of ballistic work AKv >=27J；
It is described to guarantee that grain size is greater than 7 grades using forging+annealing+normalizing, in which: upset ratio is greater than 5, after main shaft is forged
800~900 DEG C keep the temperature 20~25 hours, then carry out pearlite annealing, keep the temperature 20~30 hours at 700~750 DEG C, improve
Even grain size eliminates mixed crystal；Later, it is handled using double normalizing, 800~900 DEG C of double normalizing temperature, soaking time
20~25 hours.
2. 42CrMo4 wind driven generator principal shaft control method according to claim 1, which is characterized in that 42CrMo4 wind
Power generator spindle material ingredient and its weight percentage are C:0.39~0.42%；Si:0.20~0.30%；Mn:0.70~
0.80%；Cr:1.10~1.20%；Mo:0.25~0.30%；Cu:≤0.10%；Al:≤0.05%； P:≤0.012%；S:≤
0.008%, surplus Fe.
3. 42CrMo4 wind driven generator principal shaft control method according to claim 1, which is characterized in that 42CrMo4 wind
Power generator spindle material ingredient and its weight percentage are C:0.39~0.42%；Si:0.20~0.30%；Mn:0.70~
0.80%；Cr:1.10~1.20%；Mo:0.25~0.30%；Cu:≤0.10%；Al:≤0.05%； P:≤0.012%；S:≤
0.008%, add microalloy element Ni:0.35~0.60%；V:0.1~0.3%；RE≤0.025%；Surplus is Fe, wherein is guaranteed
Ni+V > 0.55%.
4. 42CrMo4 wind driven generator principal shaft control method according to claim 1, which is characterized in that in original smelting
Refining pouring technology: carried out under conditions of electric furnace+LF+VD+ molding it is low be mingled with control, balance control in conjunction with slag steel and by smart in LF
Addition rare earth treatment is realized after refining；Selected refining slag system is aluminium oxide >=20wt%, silica≤12wt%, and rare earth is added
Amount≤0.025wt%, by A, C field trash Type Control≤0.5 grade, by Control and Inclusion Removal≤1 grade B, D.
5. 42CrMo4 wind driven generator principal shaft control method according to claim 1, which is characterized in that using alternating
Water quenching+tempering process guarantees that matrix meets properties of product, in which: in quenching technical, 840~890 DEG C of hardening heat,
Soaking time 20~25 hours, using alternately water quenching mode, and using contact whole process real-time cooling speed control method to master
The entire hardening process cooling rate of axis is controlled；In tempering process, 645~665 DEG C of tempering temperature, soaking time 25~30 is small
When.
6. 42CrMo4 wind driven generator principal shaft control method according to claim 5, which is characterized in that in quenching technical
In, 42CrMo4 wind driven generator principal shaft enters coolant-temperature gage control at 840~900 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710975697.8A CN107858590B (en) | 2017-10-19 | 2017-10-19 | A kind of 42CrMo4 wind driven generator principal shaft control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710975697.8A CN107858590B (en) | 2017-10-19 | 2017-10-19 | A kind of 42CrMo4 wind driven generator principal shaft control method |
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| Publication Number | Publication Date |
|---|---|
| CN107858590A CN107858590A (en) | 2018-03-30 |
| CN107858590B true CN107858590B (en) | 2019-06-04 |
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| CN201710975697.8A Active CN107858590B (en) | 2017-10-19 | 2017-10-19 | A kind of 42CrMo4 wind driven generator principal shaft control method |
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| CN109536691B (en) * | 2018-11-21 | 2020-12-29 | 东北大学无锡研究院 | Preparation method of low-temperature impact resistant CrMo alloy steel forged circle |
| CN109536833A (en) * | 2018-12-05 | 2019-03-29 | 南阳汉冶特钢有限公司 | A kind of high duty alloy tool steel 42CrMo4 hardened and tempered steel plate and its production method |
| CN110157867B (en) * | 2019-04-29 | 2020-09-18 | 中国科学院金属研究所 | Control method for white abnormal structure in large-size CrMo steel member |
| CN110396648B (en) * | 2019-06-29 | 2021-04-09 | 江阴兴澄特种钢铁有限公司 | Super-thick alloy die steel plate produced by continuous casting billet and manufacturing method thereof |
| CN111299481B (en) * | 2019-11-19 | 2021-12-07 | 湖北坚丰科技股份有限公司 | Closed forging and pressing forming process for gear shaft of new energy automobile engine |
| CN111809112A (en) * | 2020-06-19 | 2020-10-23 | 张家港海锅新能源装备股份有限公司 | Production method of S42Cr1S forging for piston rod of marine diesel engine |
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| CN106435405A (en) * | 2015-08-06 | 2017-02-22 | 江苏金源锻造股份有限公司 | 42CrMo4 wind power main shaft after-forging heat treatment method of low-wind-speed wind turbine generator |
| CN106702099A (en) * | 2017-01-18 | 2017-05-24 | 抚顺特殊钢股份有限公司 | Large-size 42 CrMo4 hardened and tempered steel manufacturing process for wind power gearbox outer main shaft |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106435405A (en) * | 2015-08-06 | 2017-02-22 | 江苏金源锻造股份有限公司 | 42CrMo4 wind power main shaft after-forging heat treatment method of low-wind-speed wind turbine generator |
| CN106702099A (en) * | 2017-01-18 | 2017-05-24 | 抚顺特殊钢股份有限公司 | Large-size 42 CrMo4 hardened and tempered steel manufacturing process for wind power gearbox outer main shaft |
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