CN104451452B - A kind of bearing steel for wind power equipment and preparation method thereof - Google Patents
A kind of bearing steel for wind power equipment and preparation method thereof Download PDFInfo
- Publication number
- CN104451452B CN104451452B CN201310419426.6A CN201310419426A CN104451452B CN 104451452 B CN104451452 B CN 104451452B CN 201310419426 A CN201310419426 A CN 201310419426A CN 104451452 B CN104451452 B CN 104451452B
- Authority
- CN
- China
- Prior art keywords
- bearing steel
- wind power
- power equipment
- forging
- present
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 158
- 239000010959 steel Substances 0.000 title claims abstract description 155
- 238000002360 preparation method Methods 0.000 title abstract description 39
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 18
- 239000011651 chromium Substances 0.000 claims abstract description 17
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 14
- 239000011733 molybdenum Substances 0.000 claims abstract description 14
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 239000010949 copper Substances 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 239000011572 manganese Substances 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 239000010703 silicon Substances 0.000 claims abstract description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 6
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 6
- 238000011156 evaluation Methods 0.000 claims abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 6
- 239000001301 oxygen Substances 0.000 claims abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 6
- 239000011574 phosphorus Substances 0.000 claims abstract description 6
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 6
- 239000011593 sulfur Substances 0.000 claims abstract description 6
- 239000010936 titanium Substances 0.000 claims abstract description 6
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract 2
- 238000005242 forging Methods 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 33
- 238000000137 annealing Methods 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 30
- 238000001816 cooling Methods 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 21
- 238000009413 insulation Methods 0.000 claims description 15
- 230000014759 maintenance of location Effects 0.000 claims description 5
- 238000010891 electric arc Methods 0.000 claims description 4
- 238000007670 refining Methods 0.000 claims description 4
- 238000009628 steelmaking Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 2
- 238000013459 approach Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 210000000080 chela (arthropods) Anatomy 0.000 description 8
- 238000013461 design Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 238000005275 alloying Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 210000001519 tissue Anatomy 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 235000019628 coolness Nutrition 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000010583 slow cooling Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 206010039509 Scab Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- FXNGWBDIVIGISM-UHFFFAOYSA-N methylidynechromium Chemical compound [Cr]#[C] FXNGWBDIVIGISM-UHFFFAOYSA-N 0.000 description 1
- -1 net carbide and near Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 210000003625 skull Anatomy 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Rolling Contact Bearings (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Bearing steel for wind power equipment and preparation method thereof that the present invention provides, it forms percentage by weight: carbon: 0.90～1.15%；Manganese: 0.90～1.15%；Silicon: 0.15～0.40%；Chromium: 1.60～1.90%；Nickel: 0.20～0.50%；Molybdenum: 0.20～0.50%；Aluminum: 0.015～0.040%；Oxygen≤0.0010%；Phosphorus≤0.020%；Sulfur :≤0.020%；Titanium≤0.0030%；Copper≤0.15%；Theil indices≤0.025%；Antimony content≤0.015%；Arsenic content≤0.030%；Surplus is Fe and inevitable impurity.Present invention is generally directed to big cross section, the bearing steel of diameter range 120mm～380mm, the net carbide controlling High-carbon Cr Bearing Steel Bar controls level: can reach 5.3 grades by SEP1520 evaluation net carbide rank.
Description
Technical field
The invention belongs to ferrous material processing technology of preparing field, relate to metallurgy industry bearing steel and preparation method thereof, be specifically related to a kind of bearing steel for wind power equipment and preparation method thereof.
Background technology
The kernel components such as Wind Power Generation Industry prospect is the most wide, and wind power equipment is the main restricting factor affecting China's Wind Power Generation Industry development, wind power bearing are then bottlenecks prepared by wind power equipment.Wind power bearing belongs to the kernel component of wind power equipment.Bad working environments and the use requirement of long-life high reliability due to wind power equipment so that wind power bearing has higher technical sophistication degree, two parts---one of the bearing and control system that the production domesticization difficulty being well recognized as is maximum.
Dimensions as wind power bearing steel is relatively big (diameter >=120mm), it is desirable to steel have uniform tissue.In high-carbon-chromium bearing steel, carbide inhomogeneities mainly shows themselves in that carbide liquid-extraction, carbide strip, carbide network.
Net carbide is the superfluous proeutectoid carbide separating out network-like distribution in hypereutectoid steel along austenite crystal border.The existence of net carbide, weakens the adhesion of metallic matrix, makes the mechanical performance of material significantly reduce (particularly fatigue life declines), makes impact toughness decreased, and fragility increases.Net carbide also increases the abundant inhomogeneities of steel, net carbide and near, carbon and alloying element enrichment, off-network is the poorest.The height of net carbide rank will directly affect the quality of wind power bearing steel.
GB/T18254 regulation needs to examine net carbide for machining and cold working spheroidizing steel；Diameter is not more than the spheroidizing material of 60mm, net carbide rankLevel；The spheroidizing material net carbide of diameter 60～120mm3 grades；And diameter is more than spheroidizing material and the hot rolling material of 120mm, net carbide does not has clear stipulaties.Along with the development of new technique, the bearing steel material of hot-working more and more uses induction heating technique.After i.e. bearing steel material is passed through intermediate frequency or high-frequency alternating current, forms the faradic current of same frequency on its surface, piece surface is heated rapidly (can heat up 800～1000 DEG C in several seconds).But heart portion that rapidly temperature rise causes material is very big with the temperature difference on surface, and the bearing parts being processed into has the biggest heritability to original bearing steel net carbide tissue.Therefore, the importance controlling large scale bearing steel mesh shape carbide is more and more prominent.
In recent years, for improving or eliminating net carbide, developing kinds of processes method, both at home and abroad, wind power bearing steel is less, mainly has a following steel grade: table 1
The main steel grade of table 1 wind power bearing steel
China Patent No. is CN201010549735.1, develops a kind of wind power bearing steel, and it uses the method reducing carbon content to solve the problem of carbide network, i.e. controls C:0.40～0.48%, adds 0.20～the Ni of the Mo of 0.30% and 0.50～1.20%.Netted problem has obtained good solution, but is made up the limited use of intensity and wearability by alloying owing to carbon content reduces, and tends not to from the basic problem solving carbide network.
There are some researches show and can improve carbide network by controlled rolling technique, it may be assumed that the course of processing is carried out temperature control and cooling control, high-temperature final rolling and quickly cools down technique.Research shows: this technology is being applied to wire rod and light section bar production, achieves gratifying effect in terms of the precipitation of suppression net carbide.But, for heavy in section bearing steel bar, owing to cooling rate is too small, then score a goal can not get and the effect of crystal grain thinning in heart portion；Cooling rate is excessive, and surface the most easily forms martensite, causes face crack, the controlled rolling and controlled cooling of heavy in section bearing steel to have its limitation.
Normalized treatment is the another kind of method improved or eliminate net carbide, will suitably be incubated to more than Acm by heat steel, makes carbide all be dissolved in austenite, and cool down (as cold in mist or water-cooled) with speed faster.But this process is equivalent to increase by one heat treatment step is unfavorable for energy-conserving and environment-protective, use the cold restriction also suffering from capacity of equipment with water-cooled of mist, the actual the most difficult control of rate of cooling, for the diameter big cross section bearing steel material more than 120mm, almost without effect.
Patent No. CN200810227811.X relates to a kind of method of producing high-carbon chromium bearing steel by double retarded cooling process, i.e. by rolling rear rapid traverse cold bed, makes cold shears shear temperature between 400～500 DEG C, is then placed again in slow cooling cover by stocking, slow cooling 24～48 hours.It is less that this patent is applicable to rolling specs, convenient shears, if specification is big, cooling rate slowly, be difficult to control to carbide network.
Patent No. CN200910062664.X relates to a kind of method reducing net level of bearing steel wire rod carbide.This patent is mainly used in the line footpath wire rod less than 25mm, inapplicable to big cross section bearing steel bar.
Patent No. CN200910062664.X relates to intelligent cooling control technical process and equipment after a kind of bearing parts forging, the boiling water of i.e. more than 90 DEG C is cooling medium, generated by the quickly cooling suppression net carbide of spray and immersion and can't crack with thinning microstructure, each workpiece carries out temperature survey, it is ensured that forging terminates during rapid cooling temperature below 680 DEG C.This patent is a kind of method controlling carbide network of bearing parts, and for big cross section bearing steel bar, it is difficult to meet spray, the appointed condition soaked.
In sum, existing wind power bearing steel technology still has the following disadvantages: it is few that (1) is suitable for big specification that wind-powered electricity generation requires, the excellent bearing steel kind of stability；(2) after existing big specification bearing steel forging rolling, rapid cooling carbide control technology is difficult to meet big cross section bearing steel bar net carbide and controls requirement, due to the big carbide of specification prolong that crystal boundary separates out in various degree netted, cooling rate is too small, then score a goal can not get and the effect of crystal grain thinning in heart portion；Cooling rate is excessive, and surface the most easily forms martensite, causes face crack；(3) normalized treatment is that one effectively improves carbide approach for light section bearing steel bar, but the carbide tissue for big cross section bearing steel bar heart portion is difficult to control to, even and if increasing the technological effect of a normalized treatment and the best be less useful for energy-conserving and environment-protective.
Summary of the invention
In order to solve the problems referred to above, it is an object of the invention to provide a kind of bearing steel for wind power equipment and preparation method thereof, mainly for big cross section, the bearing steel of diameter range 120mm～380mm, by controlling the net carbide control level of big cross section High-carbon Cr Bearing Steel Bar: can reach 5.3 grades by SEP1520 evaluation net carbide rank to high-carbon-chromium bearing steel Heating Steel Ingots, forging, annealing process.
The technical solution of the present invention is as follows: the present invention provides a kind of bearing steel for wind power equipment, it is characterised in that the percentage by weight that its one-tenth is grouped into is: carbon: 0.90～1.15%；Manganese: 0.90～1.15%；Silicon: 0.15～0.40%；Chromium: 1.60～1.90%；Nickel: 0.20～0.50%；Molybdenum: 0.20～0.50%；Aluminum: 0.015～0.040%；Oxygen≤0.0010%；Phosphorus≤0.020%；Sulfur :≤0.020%；Titanium≤0.0030%；Copper≤0.15%；Theil indices≤0.025%；Antimony content≤0.015%；Arsenic content≤0.030%；Surplus is Fe and inevitable impurity.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described nickel percentage by weight is 0.25～0.40%.
The bearing steel for wind power equipment provided according to the present invention, it is further preferred that, described nickel percentage by weight is 0.28～0.35%.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described weight of molybdenum percentage ratio is 0.22～0.45%.
The bearing steel for wind power equipment provided according to the present invention, it is further preferred that, described weight of molybdenum percentage ratio is 0.25～0.40%.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described carbon percentage by weight is 0.92～1.10%.
The bearing steel for wind power equipment provided according to the present invention, it is further preferred that, described carbon percentage by weight is 0.95～0.98%.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described manganese percentage by weight is 0.98～1.15%.
The bearing steel for wind power equipment provided according to the present invention, it is further preferred that, described manganese percentage by weight is 0.99～1.00%.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described silicon percentage by weight is 0.20～0.39%.
The bearing steel for wind power equipment provided according to the present invention, it is further preferred that, described silicon percentage by weight is 0.22～0.35%.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described weight of chromium percentage ratio is 1.62～1.89%.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described aluminum percentage by weight is 0.018～0.030%.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described oxygen percentage by weight is≤0.0008%.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described phosphorus percentage by weight is≤0.010%.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described sulfur percentage by weight is≤0.010%.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described titanium percentage by weight is≤0.0020%.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described weight of copper percentage ratio is≤0.15%.
The bearing steel for wind power equipment provided according to the present invention, it is further preferred that, described weight of copper percentage ratio is≤0.08%.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described stannum percentage by weight is≤0.012%.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described antimony percentage by weight is≤0.008%.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described arsenic percentage by weight is≤0.010%.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that described bearing steel cross section diameter 120～380mm.
The bearing steel for wind power equipment provided according to the present invention, it is further preferred that, described bearing steel cross section diameter 270～380mm.
The bearing steel for wind power equipment provided according to the present invention, it is preferred that the net carbide of described bearing steel controls level: reach 5.3 grades by SEP1520 evaluation net carbide rank.
The present invention also provides for the preparation method of the described bearing steel for wind power equipment, comprises the steps: that electric arc furnace or pneumatic steelmaking → refining furnace refine → application of vacuum stove process → pour into a mould or static ingot → heating → forging → annealing；
In described heating steps, the temperature 1200 of the heating of heating furnace～1220 DEG C, temperature retention time 900～1100min；
In described forging step, open forging temperature 1100～1180 DEG C, final forging temperature 850～880 DEG C；
In described annealing steps, batch of material heats up 800～830 DEG C after entering annealing furnace, is incubated 16～20 hours, is then cooled to 660～700 DEG C, is incubated 34～42 hours.
The preparation method of the described bearing steel for wind power equipment is provided according to the present invention, preferably, in described heating steps, heating furnace is waited to expect 450～600 DEG C of temperature, it is incubated 100～150min after steel ingot shove charge, then rises to 780～820 DEG C with the programming rate of≤2 DEG C/min, be incubated 100～160min, rise to 1200～1220 DEG C with the programming rate of≤1.9 DEG C/min again, be incubated 900～1100min.
There is provided the preparation method of the described bearing steel for wind power equipment according to the present invention, it is preferred that in described forging step, open forging temperature 1100～1180 DEG C, temperature retention time 120～180min.
The preparation method of the described bearing steel for wind power equipment is provided according to the present invention, it is further preferred that, in described forging step, open forging temperature 1120～1150 DEG C, temperature retention time 120～180min.
Thering is provided the preparation method of the described bearing steel for wind power equipment according to the present invention, it is preferred that in described annealing steps, after forging, batch of material enters annealing furnace, rises to 800～830 DEG C with the programming rate of≤1.7 DEG C/min, is incubated 16～20 hours；It is down to 660～700 DEG C with the cooling rate of 0.3～0.7 DEG C/min again, is incubated 34～42 hours.
The preparation method of the described bearing steel for wind power equipment is provided according to the present invention, it is further preferred that, rise to 800～830 DEG C with the programming rate of≤1.7 DEG C/min, be incubated 19～20 hours；It is down to 660～700 DEG C with the cooling rate of 0.3～0.7 DEG C/min again, is incubated 38～42 hours.
Thering is provided the preparation method of the described bearing steel for wind power equipment according to the present invention, it is preferred that in described annealing steps, after forging, batch of material enters annealing furnace, annealing furnace temperature 600～650 DEG C.
The preparation method of the described bearing steel for wind power equipment, the described bearing steel for wind power equipment is provided to become the percentage by weight being grouped into be according to the present invention: carbon: 0.90～1.15%；Manganese: 0.90～1.15%；Silicon: 0.15～0.40%；Chromium: 1.60～1.90%；Nickel: 0.20～0.50%；Molybdenum: 0.20～0.50%；Aluminum: 0.015～0.040%；Oxygen≤0.0010%；Phosphorus≤0.020%；Sulfur :≤0.020%；Titanium≤0.0030%；Copper≤0.15%；Theil indices≤0.025%；Antimony content≤0.015%；Arsenic content≤0.030%；Surplus is Fe and inevitable impurity.
The preparation method of the described bearing steel for wind power equipment is provided, it is preferred that described nickel percentage by weight is 0.25～0.40% according to the present invention.
The preparation method of the described bearing steel for wind power equipment is provided according to the present invention, it is further preferred that, described nickel percentage by weight is 0.28～0.35%.
The preparation method of the described bearing steel for wind power equipment is provided, it is preferred that described weight of molybdenum percentage ratio is 0.22～0.45% according to the present invention.
The preparation method of the described bearing steel for wind power equipment is provided according to the present invention, it is further preferred that, described weight of molybdenum percentage ratio is 0.25～0.40%.
The preparation method of the described bearing steel for wind power equipment is provided, it is preferred that described carbon percentage by weight is 0.92～1.10% according to the present invention.
The preparation method of the described bearing steel for wind power equipment is provided according to the present invention, it is further preferred that, described carbon percentage by weight is 0.95～0.98%.
The preparation method of the described bearing steel for wind power equipment is provided, it is preferred that described manganese percentage by weight is 0.98～1.15% according to the present invention.
The preparation method of the described bearing steel for wind power equipment is provided according to the present invention, it is further preferred that, described manganese percentage by weight is 0.99～1.00%.
The preparation method of the described bearing steel for wind power equipment is provided, it is preferred that described silicon percentage by weight is 0.20～0.39% according to the present invention.
The preparation method of the described bearing steel for wind power equipment is provided according to the present invention, it is further preferred that, described silicon percentage by weight is 0.22～0.35%.
The preparation method of the described bearing steel for wind power equipment is provided, it is preferred that described weight of chromium percentage ratio is 1.62～1.89% according to the present invention.
The preparation method of the described bearing steel for wind power equipment is provided, it is preferred that described aluminum percentage by weight is 0.018～0.030% according to the present invention.
The preparation method of the described bearing steel for wind power equipment is provided, it is preferred that described oxygen percentage by weight is≤0.0008% according to the present invention.
The preparation method of the described bearing steel for wind power equipment is provided, it is preferred that described phosphorus percentage by weight is≤0.010% according to the present invention.
The preparation method of the described bearing steel for wind power equipment is provided, it is preferred that described sulfur percentage by weight is≤0.010% according to the present invention.
The preparation method of the described bearing steel for wind power equipment is provided, it is preferred that described titanium percentage by weight is≤0.0020% according to the present invention.
The preparation method of the described bearing steel for wind power equipment is provided, it is preferred that described weight of copper percentage ratio is≤0.15% according to the present invention.
The preparation method of the described bearing steel for wind power equipment is provided according to the present invention, it is further preferred that, described weight of copper percentage ratio is≤0.08%.
The preparation method of the described bearing steel for wind power equipment is provided, it is preferred that described stannum percentage by weight is≤0.012% according to the present invention.
The preparation method of the described bearing steel for wind power equipment is provided, it is preferred that described antimony percentage by weight is≤0.008% according to the present invention.
The preparation method of the described bearing steel for wind power equipment is provided, it is preferred that described arsenic percentage by weight is≤0.010% according to the present invention.
Key element function analysis of the present invention:
Nickel: nickel can improve the toughness of steel in wind power bearing steel, this patent design nickel content is 0.20～0.50% combination of strength and toughness that can obtain satisfaction.
Molybdenum: in wind power bearing steel, its effect mainly improves quenching degree, improves mechanical property, particularly improves toughness effect.Additionally, molybdenum can improve wearability, molybdenum typically below 1.00%.This patent interpolation 0.02～the molybdenum of 0.09%, coordinate with other alloying elements and can play the effect improving toughness, improving quenching degree.
The smelting process that bearing steel of the present invention uses, i.e. electric arc furnace (or converter) → refining furnace (LF stove) → application of vacuum stove (VD or RH) → cast (molding) steel ingot, reaches to control the purpose of net carbide by design hot-working method.
The hot-working method of present invention design is " three-step approach ", reaches the control of big cross section (diameter 120～380mm) High-carbon Cr Bearing Steel Bar net carbide.Three-step approach is i.e.: the first step: heating；Second step: forging；3rd step: annealing.
Net carbide of the present invention controls key technology: first, steel ingot it is heated to above Ac3 (during heating, free ferrite is completely reformed into austenite finishing temperature) with certain programming rate and keeps certain time to reach abundant austenitizing, being i.e. incubated 900～1100min at 1200～1220 DEG C.The purpose of forging be the more important thing is in addition to ensureing final size and made net carbide the most broken, therefore 1 jumping-up-pulling technique of design, and control final forging temperature 850～880 DEG C, although now proeutectoid carbide preferentially separates out along austenite grain boundary, but deformation is still proceeding, still the net carbide of precipitation can be crushed.Timely enter annealing furnace after forging and prevent the precipitation of proeutectoid carbide, design 2 segmentation annealing process i.e.: 800～830 DEG C of insulations+660～700 DEG C of insulations in 16～20 hours 34～42 hours, improve net carbide further.
Three-step approach of the present invention, the first step heats, and checks the defect such as surface of steel ingot skull patch, crackle before (1) heating, be not allow for height and the degree of depth more than being mingled with of 5mm, cold spatter, pit, projection, scab, the defect such as wrinkle.Removing is should give as defective.(2) charging, by heat (batch) number, steel grade record steel ingot position；(3) heating, heating furnace is waited to expect 450～600 DEG C of temperature, it is incubated 100～150min after steel ingot shove charge, rises to 780～820 DEG C of insulations 100～160min with the programming rate of≤2 DEG C/min, rise to 1200～1220 DEG C of insulations 900～1100min with the programming rate of≤1.9 DEG C/min.
In heating technique, (3) are necessary technology measure, and suitable programming rate can prevent steel ingot burning, overheated, male and female face is uneven, do not grill thoroughly, very hot oven bursts.And Heating Steel Ingots homogeneous temperature can be prevented male and female face and length direction material temperature excessive by suitable equal thermal system, prevent that forging process generation upsetting is flat, upsetting is curved or gathering stock.
Three-step approach of the present invention, second step forges: (1) pressure handle, and the pincers before steel ingot jumping-up should match size with jumping-up drain cap aperture, and ensures that pincers are the most eccentric.Open forging temperature 1100～1180 DEG C.For avoiding producing pincers pressure handle riveting upsetting phenomenon in upsetting process, before jumping-up, pincers short 150～200mm should be advisable than drain cap height extruding length.Excision Steel ingot feeder head end, ingot butt excision >=2%.Pressure handle completes laggard to melt down insulation (temperature is 1180～1200 DEG C), is incubated 120～180min.(2) jumping-up, in order to avoid upsetting process to occur, material upsetting is curved and Double drum type, blank height and diameter ratio answer≤2.5.Slowly jumping-up is to 1/2, intermediate hold 10～20 seconds, then pulls out to 530mm side (need to carry out chamfered edge), and chamfered edge completes laggard to melt down insulation (temperature is 1180～1200 DEG C), insulation 15～40min.(3) after coming out of the stove, by trimmed size forging finished product, final forging temperature 850～880 DEG C.
Three-step approach of the present invention, three-step annealing:
Timely enter annealing furnace (annealing furnace temperature 600～650 DEG C) hot charging after forging to wait to expect.(2) after this batch of material is here, rise to 800～830 DEG C with the programming rate of≤1.7 DEG C/min and be incubated 16～20 hours.(3) it is down to 660～700 DEG C with the cooling rate of 0.3～0.7 DEG C/min and is incubated 34～42 hours.(4) it is down to≤450 DEG C of air coolings of coming out of the stove with the cooling rate of 0.3～0.7 DEG C/min.
As Figure 1-4, horizontal sample is taken at the forging round steel center of diameter 300mm and 1/2R (radius) place, sample carries out heat treatment in box-annealing furnace, Technology for Heating Processing: quench 820 DEG C～840 DEG C (being 840 DEG C～880 DEG C containing molybdenum steel), insulation 420～460min, oil is cold；Temperature 130～170 DEG C, tempering time 60～120min.Polish after quenching, after 4% nital corrodes, observe net carbide.Fig. 1 show 1/2R position banding pattern (100X), and Fig. 2 is the netted pattern in 1/2R position (200X), and Fig. 3 show center banding pattern (100X), the netted pattern in position (200X) centered by Fig. 4.The most all being chosen as 5.3 grades by SEP1520 standard rating, illustrate, the carbide network difference in center and 1/2R (radius) place is little.
Useful technique effect:
Bearing steel for wind power equipment that the present invention provides and preparation method thereof, mainly for big cross section, the bearing steel of diameter range 120mm～380mm, by controlling the net carbide control level of big cross section High-carbon Cr Bearing Steel Bar: can reach 5.3 grades by SEP1520 evaluation net carbide rank to high-carbon-chromium bearing steel Heating Steel Ingots, forging, annealing process.
Accompanying drawing explanation
Bearing steel 1/2R position banding pattern (100X) figure that Fig. 1 provides for the present invention；
Bearing steel 1/2R position netted pattern (200X) figure that Fig. 2 provides for the present invention；
Bearing steel center banding pattern (100X) figure that Fig. 3 provides for the present invention；
Bearing steel center netted pattern (200X) figure that Fig. 4 provides for the present invention.
Detailed description of the invention
In order to be more fully understood that the present invention, it is further elucidated with present disclosure below in conjunction with embodiment, but the content of invention is not limited solely to the following examples.
1, bearing steel for wind power equipment that the present invention provides and preparation method thereof, embodiment 1～8 chemical composition sees table 2
Table 2 embodiment chemical composition (%)
2, the preparation method of the bearing steel for wind power equipment that the present invention provides, is controlled net carbide (but being not limited to above invention steel) by three-step approach to invention steel, and each step condition is shown in Table 3., and processing step is as follows:
Electric arc furnace (or converter) steel-making → refining furnace (LF stove) refine → application of vacuum stove (VD or RH) → cast (molding) steel ingot, reaches to control the purpose of net carbide by design hot-working method.
The hot-working method of present invention design is " three-step approach ", reaches the control of big cross section (diameter 120～380mm) High-carbon Cr Bearing Steel Bar net carbide.Three-step approach is i.e.: the first step: heating；Second step: forging；3rd step: annealing.
The first step heats: check surface of steel ingot before (1) heating；(2) charging, by heat (batch) number, steel grade record steel ingot position；(3) heating, heating furnace is waited to expect 450～600 DEG C of temperature, it is incubated 100～150min after steel ingot shove charge, rises to 780～820 DEG C of insulations 100～160min with the programming rate of≤2 DEG C/min, rise to 1200～1220 DEG C of insulations 900～1100min with the programming rate of≤1.9 DEG C/min.
Second step forge: (1) pressure handle, the pincers before steel ingot jumping-up chi in matching with jumping-up drain cap aperture, and ensure pincers the most eccentric.Open forging temperature 1100～1180 DEG C.For avoiding producing pincers pressure handle riveting upsetting phenomenon in upsetting process, before jumping-up, pincers short 150～200mm should be advisable than drain cap height extruding length.Excision Steel ingot feeder head end, ingot butt excision >=2%.Pressure handle completes laggard to melt down insulation (temperature is 1180～1200 DEG C), is incubated 120～180min.(2) jumping-up, in order to avoid upsetting process to occur, material upsetting is curved and Double drum type, blank height and diameter ratio answer≤2.5.Slowly jumping-up is to 1/2, intermediate hold 10～20 seconds, then pulls out to 530mm side (need to carry out chamfered edge), and chamfered edge completes laggard to melt down insulation (temperature is 1180～1200 DEG C), insulation 15～40min.(3) after coming out of the stove, by trimmed size forging finished product, final forging temperature 850～880 DEG C.
Three-step annealing: timely enter annealing furnace (annealing furnace temperature 600～650 DEG C) hot charging after (1) forging and wait to expect.(2) after this batch of material is here, rise to 800～830 DEG C with the programming rate of≤1.7 DEG C/min and be incubated 16～20 hours.(3) it is down to 660～700 DEG C with the cooling rate of 0.3～0.7 DEG C/min and is incubated 34～42 hours.(4) it is down to≤450 DEG C of air coolings of coming out of the stove with the cooling rate of 0.3～0.7 DEG C/min.
Table 3
Implementing the wind power bearing Steel Bar that the present invention produces, its net carbide has reached 2.5 grades of 5.3 grades of GB/T18254 standards of SEP1520 standard.Big disconnected high carbon chromium
Bearing steel bar is prepared enterprise through certain bearing domestic and is prepared as certain wind-powered electricity generation bearing, and product all technical meets the requirement of design.
Bearing steel for wind power equipment that the present invention provides and preparation method thereof, mainly for big cross section, the bearing steel of diameter range 120mm～380mm, by controlling the net carbide control level of big cross section High-carbon Cr Bearing Steel Bar: can reach 5.3 grades by SEP1520 evaluation net carbide rank to high-carbon-chromium bearing steel Heating Steel Ingots, forging, annealing process.
Claims (8)
1. the bearing steel for wind power equipment, it is characterised in that the percentage by weight that its one-tenth is grouped into is: carbon:
0.90～1.15%；Manganese: 0.90～1.15%；Silicon: 0.15～0.40%；Chromium: 1.60～1.90%；Nickel: 0.20～
0.50%；Molybdenum: 0.20～0.50%；Aluminum: 0.015～0.040%；Oxygen≤0.0010%；Phosphorus≤0.020%；Sulfur:
≤ 0.020%；Titanium≤0.0030%；Copper≤0.15%；Theil indices≤0.025%；Antimony content≤0.015%；Arsenic content
≤ 0.030%；Surplus is Fe and inevitable impurity；Described bearing steel cross section diameter 120～380mm；
The described bearing steel for wind power equipment is prepared from by following steps:
Electric arc furnace or pneumatic steelmaking → refining furnace refine → application of vacuum stove process → pour into a mould or static ingot → heating
→ forging → annealing；
In described heating steps, the temperature 1200 of the heating of heating furnace～1220 DEG C, temperature retention time 900～110
0min；
In described forging step, open forging temperature 1100～1180 DEG C, final forging temperature 850～880 DEG C；
In described annealing steps, batch of material heats up 800～830 DEG C after entering annealing furnace, is incubated 16～20 hours,
Then it is cooled to 660～700 DEG C, is incubated 34～42 hours.
Bearing steel for wind power equipment the most according to claim 1, it is characterised in that described nickel weight
Percentage ratio is 0.25～0.40%.
Bearing steel for wind power equipment the most according to claim 1, it is characterised in that described weight of molybdenum
Percentage ratio is 0.22～0.45%.
Bearing steel for wind power equipment the most according to claim 1, it is characterised in that described bearing steel
Net carbide controls level: reach 5.3 grades by SEP1520 evaluation net carbide rank.
Bearing steel for wind power equipment the most according to claim 1, it is characterised in that in described heating
In step, heating furnace is waited to expect 450～600 DEG C of temperature, after steel ingot shove charge be incubated 100～150min, then with≤
The programming rate of 2 DEG C/min rises to 780～820 DEG C, is incubated 100～160min, then the intensification with≤1.9 DEG C/min
Speed rises to 1200～1220 DEG C, is incubated 900～1100min.
Bearing steel for wind power equipment the most according to claim 1, it is characterised in that in described forging
In step, open forging temperature 1100～1180 DEG C, temperature retention time 120～180min.
Bearing steel for wind power equipment the most according to claim 1, it is characterised in that in described annealing step
In Zhou, after forging, batch of material enters annealing furnace, rises to 800～830 DEG C with the programming rate of≤1.7 DEG C/min, insulation
16～20 hours；Being down to 660～700 DEG C with the cooling rate of 0.3～0.7 DEG C/min again, insulation 34～42 is little
Time.
Bearing steel for wind power equipment the most according to claim 7, it is characterised in that in described annealing
In step, after forging, batch of material enters annealing furnace, annealing furnace temperature 600～650 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310419426.6A CN104451452B (en) | 2013-09-13 | 2013-09-13 | A kind of bearing steel for wind power equipment and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310419426.6A CN104451452B (en) | 2013-09-13 | 2013-09-13 | A kind of bearing steel for wind power equipment and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104451452A CN104451452A (en) | 2015-03-25 |
| CN104451452B true CN104451452B (en) | 2016-09-28 |
Family
ID=52898191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310419426.6A Active CN104451452B (en) | 2013-09-13 | 2013-09-13 | A kind of bearing steel for wind power equipment and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104451452B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817487B (en) * | 2016-03-16 | 2017-10-31 | 山东钢铁股份有限公司 | The control method of bearing Steel Bar net carbide and the device for implementing this method |
| CN106591546A (en) * | 2016-12-13 | 2017-04-26 | 椿中岛机械(太仓)有限公司 | Rapid inspection method for bearing steel spheroidizing annealing material carbon scarcity and decarburization |
| CN107385331A (en) * | 2017-07-07 | 2017-11-24 | 安徽同盛环件股份有限公司 | A kind of high-strength corrosion-resisting flange forge piece and its production technology |
| CN107685129B (en) * | 2017-08-22 | 2019-03-26 | 上海腾辉锻造有限公司 | A kind of forging preparation method of heavy type electric arbor |
| CN112522631A (en) * | 2020-11-13 | 2021-03-19 | 江苏联峰能源装备有限公司 | Steel for wind power and preparation method thereof |
| CN114134403B (en) * | 2021-05-19 | 2023-01-13 | 江阴兴澄特种钢铁有限公司 | Steel for large-specification wind power bearing rolling body and production method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1745188A (en) * | 2003-01-30 | 2006-03-08 | 住友金属工业株式会社 | Steel pipe for bearing parts, manufacturing method and cutting method thereof |
| CN1774521A (en) * | 2003-04-16 | 2006-05-17 | 杰富意钢铁株式会社 | Steel material with excellent rolling fatigue life and method of producing the same |
| CN1863935A (en) * | 2003-10-10 | 2006-11-15 | Ntn株式会社 | Rolling bearing |
| CN101709365A (en) * | 2009-11-13 | 2010-05-19 | 中原特钢股份有限公司 | Heating processing process in production of high -carbon chromium bearing steel |
| CN102758073A (en) * | 2012-07-18 | 2012-10-31 | 浙江天马轴承股份有限公司 | Heat treatment method of bearing |
-
2013
- 2013-09-13 CN CN201310419426.6A patent/CN104451452B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1745188A (en) * | 2003-01-30 | 2006-03-08 | 住友金属工业株式会社 | Steel pipe for bearing parts, manufacturing method and cutting method thereof |
| CN1774521A (en) * | 2003-04-16 | 2006-05-17 | 杰富意钢铁株式会社 | Steel material with excellent rolling fatigue life and method of producing the same |
| CN1863935A (en) * | 2003-10-10 | 2006-11-15 | Ntn株式会社 | Rolling bearing |
| CN101709365A (en) * | 2009-11-13 | 2010-05-19 | 中原特钢股份有限公司 | Heating processing process in production of high -carbon chromium bearing steel |
| CN102758073A (en) * | 2012-07-18 | 2012-10-31 | 浙江天马轴承股份有限公司 | Heat treatment method of bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104451452A (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104451452B (en) | A kind of bearing steel for wind power equipment and preparation method thereof | |
| CN108330390B (en) | A kind of alloy cold heading steel wire rod resistant to delayed fracture and production method thereof | |
| CN105525078B (en) | A kind of preparation method of raising 4Cr5MoSiV1 hot-work die Steel Properties | |
| CN107988550B (en) | Steel for pressurized water reactor nuclear power station pressure vessel support and manufacturing method thereof | |
| CN102837165B (en) | Manufacturing method for final-stage driving gear of high-power coal mining machine | |
| CN102776450B (en) | Quenching heat treatment process for hot work die steel with low heat resistance | |
| CN104046915A (en) | Large-section high-performance hot work die steel for die casting and preparation technology thereof | |
| CN103981347B (en) | A kind of processing method of CrNiMoV high pressure steel forgings crystal grain refinement | |
| CN109280849A (en) | A kind of high performance hot-work die steel and its manufacturing process | |
| CN102650020A (en) | High-silicon high-manganese type high-thermal stability hot work die steel and thermal treatment process thereof | |
| CN118166286B (en) | 10.9-Grade non-adjustable cold heading steel hot rolled wire rod and manufacturing method thereof | |
| CN103966411B (en) | A kind of manufacture method of medium carbon cold heading steel Bar Wire Product | |
| CN109913768A (en) | A kind of electroslag remelting hot die steel and preparation method thereof | |
| CN106884118A (en) | Forging Electroslag Cladding high-speed steel roll and its manufacture method | |
| CN105506249A (en) | Heat treatment method for high-nitrogen corrosion resistant plastic die steel | |
| CN101787420A (en) | Large-size mandril structure property control method | |
| CN106636883B (en) | High life bearing steel and its manufacture method | |
| CN104120341A (en) | Cr5 steel forging work roll for rolling extremely thin materials and preparation method thereof | |
| CN103233107B (en) | Production method of forged cake for high-temperature alloy turbine disk | |
| CN103789520B (en) | At the uniform velocity heat-eliminating medium and the application after forging in controlled cooling model process thereof | |
| CN118639124A (en) | A kind of cold heading steel high carbon hot rolled wire rod for 15.9 grade bolts and its manufacturing method | |
| CN103740912A (en) | Processing method for improving temper embrittlement resistance of steel plate for pressure vessels | |
| CN103993144A (en) | Method for production of H13 die steel by bloom continuous casting | |
| CN105950991B (en) | A kind of cupric height polishing mould steel and its preparation technology | |
| CN102189113B (en) | Alloy steel support roll of rolling mill and manufacturing process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210428 Address after: 200940 No. 1269, Fisheries Road, Shanghai, Baoshan District Patentee after: BAOSTEEL SPECIAL STEEL LONG PRODUCTS Co.,Ltd. Address before: 200940 No. 1269, Fisheries Road, Shanghai, Baoshan District Patentee before: BAOSTEEL SPECIAL STEEL Co.,Ltd. |
|
| TR01 | Transfer of patent right |