CN109825762A - A kind of high-speed high-performance bearing steel and preparation method thereof - Google Patents
A kind of high-speed high-performance bearing steel and preparation method thereof Download PDFInfo
- Publication number
- CN109825762A CN109825762A CN201910046028.1A CN201910046028A CN109825762A CN 109825762 A CN109825762 A CN 109825762A CN 201910046028 A CN201910046028 A CN 201910046028A CN 109825762 A CN109825762 A CN 109825762A
- Authority
- CN
- China
- Prior art keywords
- steel
- molten steel
- slag
- bearing steel
- argon gas
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of high-speed high-performance bearing steel, the ingredient including following weight percent: carbon 0.77~0.85%；Silicon 0.7~0.9%；Manganese 1.0~1.1%；Molybdenum 0.15~0.2%；Chromium 1.4~1.55%；Aluminium 0.01~0.015%；Lanthanum+cerium 0.001~0.002%；Phosphorus < 0.01%；Sulphur < 0.005%；Nickel≤0.25%；Copper≤0.2%；Arsenic≤0.04%；Tin≤0.03%；Lead≤0.002%；Titanium≤0.003%；Calcium≤0.001%, remaining is iron.The bearing steel meets following mechanical property requirements: high contact fatigue strength and high compression strength；High antifatigue spalling；Preferable impact flexibility；Good dimensional stability.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy more particularly to a kind of high-speed high-performance bearing steel and preparation method thereof.
Background technique
Bearing steel be quality requirement is most stringent, inspection project is most in all steel alloys, the maximum steel grade of production difficulty it
One, it is mainly used for the manufacture of rolling bearing.
The bearing steel that the country is mainly used for bearing mnanufacture mainly has high-carbon-chromium bearing steel such as: G8Cr15, GCr15,
GCr15SiMn, GCr18Mo etc.；Middle carbon alloy bearing steel is such as: 50CrVA, 55SiMo, 55SiMoV；Carburizing bearing steel is such as:
G20CrNiMoA, G20Cr2Ni4A etc..Discovery is when high-carbon-chromium bearing steel use is in High Loading Rate environment in use
When, it is easy Cracking Failure, causes service life low；Carbon or carburizing bearing steel in use, it is past although can be avoided Cracking Failure
Toward be easily deformed in use it is stuck cause operational failure or wear no resistance, service life is not also high；And middle carbon and infiltration
Carbon bearing steel, to guarantee its wearability, manufacturing process must carburizing or carbonitriding, so not only the production cycle it is long but also
Considerably increase manufacturing cost.
To improve the air conditioner compressed machine bearing of high speed, automobile variable speed axle box bearing, vibrating screen bearing, high-speed precise machine tool spindle shaft
It holds, automobile variable speed axle box bearing, new-energy automobile, the long-life of bearings, high revolving speed, impact resistance, the resistance to alternation such as various express pump classes
A large amount of technical data are consulted by the applying working conditions such as load, this team, according to the air conditioner compressed machine bearing of high speed, automobile variable speed axle box bearing,
Vibrating screen bearing, high-speed precise machine tool main shaft bearing, automobile variable speed axle box bearing, new-energy automobile, various express pump classes etc., revolving speed
Height, long service life need to carry shock loading, working environment and may propose bearing institute described above the outdoor the features such as
Need the mechanical property requirements of material:
(1) there is high contact fatigue strength and high compression strength；
(2) there is high antifatigue spalling；
(3) there is preferable impact flexibility, load can be absorbed impact in bearing working；
(4) good dimensional stability prevents bearing in the long-term use because change in size reduces precision and service life.
According to these performance requirements of material, the material required above can be met at home comprehensively by not finding, in foreign countries
The material for meeting above-mentioned requirements is found, but price is very expensive, the Master Cost of bearing ring is original a set of bearing price
Tens times even hundreds of times.
Therefore the present invention provides a kind of novel high speed high-performance bearing steel, be primarily adapted for use in the air conditioner compressed machine bearing of high speed,
It is automobile variable speed axle box bearing, vibrating screen bearing, high-speed precise machine tool main shaft bearing, automobile variable speed axle box bearing, new-energy automobile, various
Express pump class etc..
Summary of the invention
Technical problems based on background technology, the invention proposes a kind of high-speed high-performance bearing steel and its preparation sides
Method.
Technical scheme is as follows:
A kind of high-speed high-performance bearing steel, the ingredient including following weight percent:
Carbon 0.77~0.85%；
Silicon 0.7~0.9%；
Manganese 1.0~1.1%；
Molybdenum 0.15~0.2%；
Chromium 1.4~1.55%；
Aluminium 0.01~0.015%；
Lanthanum+cerium 0.001~0.002%；
Phosphorus < 0.01%；
Sulphur < 0.005%；
Nickel≤0.25%；
Copper≤0.2%；
Arsenic≤0.04%；
Tin≤0.03%；
Lead≤0.002%；
Titanium≤0.003%；
Calcium≤0.001%；
Remaining is iron.
Preferably, the high-speed high-performance bearing steel, oxygen content are lower than 9PPM.
Preferably, the high-speed high-performance bearing steel, hydrogen content are lower than 1PPM.
The preparation method of high-speed high-performance bearing steel of the present invention, successively the following steps are included:
Step 1 carries out steel scrap in EBT type electric furnace the first refining of molten steel；Coke blacking is sprayed into after melting sources makes foam
Slag, slag making height are 550~650mm, and flow slag in time and add 100~200kg of lime, to reduce phosphorus content when slagging tap,
Phosphorus is reduced to≤0.01%；Molten steel temperature uses after 1590~1620 DEG C of boiling 25~35min degasification stays steel to stay slag mode
Tapping；
Step 2, in the LF ladle refining furnace that capacity and electric furnace match, slag making deoxidation, desulfurization, removing sundries；Simultaneously
Be sequentially added into ladle the ferrosilicon intermediate alloy by calculating, ferrochrome intermediate alloy, manganese iron intermediate alloy, aluminium, among ferronickel
Alloy needs to be continuously added aluminum steel in this process；In refining overall process by the air brick mounted in ladle bottom to blowing in just also
Argon gas makes molten steel obtain certain stirring kinetic energy and carries out refining liquid steel, the molten steel not exposed top of the slag controlled during blowing argon gas, and adopt
The molten steel diffusive deoxidation of top slag is carried out with iron silicon powder, carbon dust, controls temperature at 1565~1585 DEG C, subsequently into VD process；
(just contain in the basic steel such as phosphorus sulphur, phosphorus, sulphur are harmful elements, and requirement is removed in smelting process
Within the scope of.)
Step 3, is vacuum-treated that (vacuum processing can be very good degassing and deoxidation is imitated to molten steel in VD vacuum drying oven
Fruit can efficiently reduce hydrogen nitrogen content in steel, should remove oxygen in steel by carbon, oxygen reaction, push up slag and molten steel by alkalinity
Abundant reaction desulfuration, the carbon monoxide generated by Argon, deoxidation and Argon Bubble make to press from both sides so that field trash is attached on bubble
Sundries is assembled and floats, and improves the degree of purity of molten steel, additionally has the function of non-uniform components and temperature), it keeps away in the process
Exempt from molten steel and generate big boiling to keep being blown into 20~25min of argon gas cleaning after 15~20min after vacuum degree≤67Pa and strengthen
Molten steel；When vacuum is broken to > 98Pa when tank side, hydraulic system is opened, vacuum cover is promoted and removes cover after vacuum cover is raised to top
Vehicle, and turn off hydraulic system, then thermometric, determine hydrogen and take with furnace sample, determine oxygen；Then rare-earth elements of lanthanum and cerium is added by calculation amount；
Start to cast when molten steel temperature is at 1495~1505 DEG C；
Step 4, casting carry out the totally-enclosed protective casting of argon gas in the cooling overall process in casting and later period；Cooled
Cheng Zhong, progress constant temperature carries out cooling in mold first after being cooled to 910~930 DEG C, and adds insulation cover slow cooling.
Preferably, in the step one, staying steel amount is the 8~10% of total tap, and slag discharge amount is few as far as possible.
Preferably, in the step three, big argon gas is needed out during rare earth element is added, rare earth element is added to
The exposed position of molten steel.
The effect of rare earth is added in the present invention, comprising:
1, cleaning molten steel.Rare earth has deoxidation, desulfidation, reduces and refines steel inclusion.
2, go bad and be mingled with.Rare earth, which is added in steel, generates spherical rare-earth sulfide or oxysulfide, replaces strip manganese sulfide
Be mingled with, fully control oxide morphology, improve the toughness plasticity especially transverse impact toughness of steel, improve steel it is each to
It is anisotropic.Rare earth makes the alumina inclusion of high rigidity change glomeration oxysulfide and aluminic acid rare earth, and it is tired to improve resisting for steel significantly
Labor performance.
3, microalloying.Rare earth in steel has certain solid solution capacity, it can inhibit phosphorus sulphur and low melting point in the segregation of crystal boundary
Impurity lead, tin, arsenic, antimony, bismuth form higher melting-point compound in the segregation of crystal boundary or with these impurity, eliminate low-melting impurities
Illeffects；Rare earth purification and reinforcing crystal boundary, hinder the formation and extension of intercrystalline crack, and it is especially high to be conducive to improvement plasticity
Warm plasticity；Rare earth can inhibit dynamic recrystallization, refines crystal grain and precipitate phase size and promote Nb in ferrite (C, N), (Nb, Ti)
The precipitation of (C, N) and V (C, N)；The rare earth of dissolution can be changed the Nomenclature Composition and Structure of Complexes of cementite and make carbide spheroidization, refinement and
Even distribution.
Rare earth is both excellent alterant and a kind of potent microalloy element.Rare earth, which has, catches hydrogen, can make the hydrogen of steel
Delayed fracture property is caused to be improved；The corrosion resistance of weathering steel, stainless steel, the antioxygenic property of heat resisting steel can be improved in rare earth
And elevated temperature strength, the anti-fatigue performance of spring steel, pinion steel and bearing steel, the thermoplasticity of hardly possible deformation high-alloy steel, rail and resistance to
Grind the wearability etc. of material.In steel be added rare earth after, can generally make steel plate, seamless steel pipe transverse impact toughness improve 50% with
On, corrosion resistance improves 60%, while improving other performances.Steel per ton adds 300 grams of rare earth or so, but effect is very significant,
It is really that art is good for strength.
Compared with traditional technology, the increased effect of the present invention is:
The present invention improves intensity by increasing silicon, and silicon makes material have high heat resistance and elastic limit；Manganese makes material
With high intensity, wearability, harden ability.Carbide is total after reduction carbon content reduction bearing ring and rolling element heat treatment
Amount, to improve the impact resistance of bearing material；Specific physical property measurement data are as shown in comparative example 1.
Due to the service life of bearing that produces by the program and mechanical property is matched with or a little higher than plain bearing steel
GCr15 or GCr15SiMn, requirement needed for reaching bearing use occasion, still there are also obvious gaps.In the base of comparative example 1
The design of comparative example 2 is proposed on plinth.Comparative example 2 design be added on the basis of comparative example 1 suitable rare-earth elements of lanthanum and
Cerium, rare-earth elements of lanthanum and cerium keep small material non-metallic inclusion quantity, size and density and steel close, and field trash is to solidification and stream
The influence of field obviously weakens, and thus caused segregation mitigates, and finds that trace rare-earth can be to element " carbon " the most key in steel
Dispersal behavior makes a significant impact, and advantageously reduces the decarburizing reaction of bearing steel heat treatment process, while improving the tissue, thin of steel
Change carbide particle.Make material that there is high intensity, high toughness and good harden ability, high stability.
Embodiment 1-3 is that molybdenum content and control Ti content are added on the basis of embodiment 2.Molybdenum makes the forging tension of material
Intensity, yield strength, hardness improve；Martensite body temper resistance can be improved in molybdenum simultaneously, is greatly improved in conjunction with chromium, nickel
Harden ability can refine crystal grain, improve toughness, improve corrosion resistance.Research shows that when Ti content > 30PPM, point easy to form
Sharp titanium nitride and titanium carbide, makes bearing be easy to produce fatigue flake, reduces the service life of bearing.
In conclusion the present invention provides a kind of novel high speed high-performance bearing steel formula and combining specific preparation side
Method, obtained bearing steel meet following mechanical property requirements:
(1) there is high contact fatigue strength and high compression strength；
(2) there is high antifatigue spalling；
(3) there is preferable impact flexibility, load can be absorbed impact in bearing working；
(4) good dimensional stability prevents bearing in the long-term use because change in size reduces precision and service life.
Specific embodiment
Embodiment 1:
A kind of high-speed high-performance bearing steel, the ingredient including following weight percent:
Carbon 0.82%；
Silicon 0.85%；
Manganese 1.02%；
Molybdenum 0.18%；
Chromium 1.47%；
Aluminium 0.012%；
Lanthanum 0.001%；
Cerium 0.0004%
Phosphorus < 0.01%；
Sulphur < 0.005%；
Nickel≤0.25%；
Copper≤0.2%；
Arsenic≤0.04%；
Tin≤0.03%；
Lead≤0.002%；
Titanium≤0.003%；
Calcium≤0.001%；
Remaining is iron.
The high-speed high-performance bearing steel, oxygen content are lower than 9PPM.
The high-speed high-performance bearing steel, hydrogen content are lower than 1PPM.
The preparation method of high-speed high-performance bearing steel of the present invention, successively the following steps are included:
Step 1 carries out steel scrap in EBT type electric furnace the first refining of molten steel；Coke blacking is sprayed into after melting sources makes foam
Slag, slag making height are 550~650mm, and flow slag in time and add lime 125kg and dropped phosphorus with reducing phosphorus content when slagging tap
As low as≤0.01%；For molten steel temperature using staying steel that slag mode is stayed to tap after 1600 DEG C of boiling 30min degasification, staying steel amount is always to go out
The 8.5% of steel amount, slag discharge amount is few as far as possible；
Step 2, in the LF ladle refining furnace that capacity and electric furnace match, slag making deoxidation, desulfurization, removing sundries；Simultaneously
Be sequentially added into ladle the ferrosilicon intermediate alloy by calculating, ferrochrome intermediate alloy, manganese iron intermediate alloy, aluminium, among ferronickel
Alloy needs to be continuously added aluminum steel in this process；In refining overall process by the air brick mounted in ladle bottom to blowing in just also
Argon gas makes molten steel obtain certain stirring kinetic energy and carries out refining liquid steel, the molten steel not exposed top of the slag controlled during blowing argon gas, and adopt
The molten steel diffusive deoxidation of top slag is carried out with iron silicon powder, carbon dust, controls temperature at 1565~1585 DEG C, subsequently into VD process；
Step 3, is vacuum-treated molten steel in VD vacuum drying oven, and molten steel is avoided to generate big boiling in the process
Argon gas 22min cleaning is blown into after keeping 18min after vacuum degree≤67Pa and strengthens molten steel；When tank side, vacuum is broken to > 98Pa
When, hydraulic system is opened, vacuum cover is promoted and removes cover vehicle after vacuum cover is raised to top, and turn off hydraulic system, then survey
Temperature determines hydrogen and takes with furnace sample, determines oxygen；Then rare-earth elements of lanthanum and cerium is added by calculation amount；It is needed during rare earth element is added
Big argon gas is opened, rare earth element is added to the exposed position of molten steel；Start to cast when molten steel temperature is at 1498 DEG C；
Step 4, casting carry out the totally-enclosed protective casting of argon gas in the cooling overall process in casting and later period；Cooled
Cheng Zhong, progress constant temperature carries out cooling in mold first after being cooled to 918 DEG C, and adds insulation cover slow cooling.
Embodiment 2:
A kind of high-speed high-performance bearing steel, the ingredient including following weight percent:
Carbon 0.85%；
Silicon 0.7%；
Manganese 1.1%；
Molybdenum 0.15%；
Chromium 1.55%；
Aluminium 0.01%；
Lanthanum 0.0008%；
Cerium 0.0012%
Phosphorus < 0.01%；
Sulphur < 0.005%；
Nickel≤0.25%；
Copper≤0.2%；
Arsenic≤0.04%；
Tin≤0.03%；
Lead≤0.002%；
Titanium≤0.003%；
Calcium≤0.001%；
Remaining is iron.
The high-speed high-performance bearing steel, oxygen content are lower than 9PPM.
The high-speed high-performance bearing steel, hydrogen content are lower than 1PPM.
The preparation method of high-speed high-performance bearing steel of the present invention, successively the following steps are included:
Step 1 carries out steel scrap in EBT type electric furnace the first refining of molten steel；Coke blacking is sprayed into after melting sources makes foam
Slag, slag making height are 550~650mm, and flow slag in time and add lime 200kg and dropped phosphorus with reducing phosphorus content when slagging tap
As low as≤0.01%；Molten steel temperature, using staying steel that slag mode is stayed to tap, stays steel amount after 1590~1620 DEG C of boiling 25min degasification
It is the 10% of total tap, slag discharge amount is few as far as possible；
Step 2, in the LF ladle refining furnace that capacity and electric furnace match, slag making deoxidation, desulfurization, removing sundries；Simultaneously
Be sequentially added into ladle the ferrosilicon intermediate alloy by calculating, ferrochrome intermediate alloy, manganese iron intermediate alloy, aluminium, among ferronickel
Alloy needs to be continuously added aluminum steel in this process；In refining overall process by the air brick mounted in ladle bottom to blowing in just also
Argon gas makes molten steel obtain certain stirring kinetic energy and carries out refining liquid steel, the molten steel not exposed top of the slag controlled during blowing argon gas, and adopt
The molten steel diffusive deoxidation of top slag is carried out with iron silicon powder, carbon dust, controls temperature at 1565~1585 DEG C, subsequently into VD process；
Step 3, is vacuum-treated molten steel in VD vacuum drying oven, and molten steel is avoided to generate big boiling in the process
Argon gas 20min cleaning is blown into after keeping 20min after vacuum degree≤67Pa and strengthens molten steel；When tank side, vacuum is broken to > 98Pa
When, hydraulic system is opened, vacuum cover is promoted and removes cover vehicle after vacuum cover is raised to top, and turn off hydraulic system, then survey
Temperature determines hydrogen and takes with furnace sample, determines oxygen；Then rare-earth elements of lanthanum and cerium is added by calculation amount；It is needed during rare earth element is added
Big argon gas is opened, rare earth element is added to the exposed position of molten steel；Start to cast when molten steel temperature is at 1505 DEG C；
Step 4, casting carry out the totally-enclosed protective casting of argon gas in the cooling overall process in casting and later period；Cooled
Cheng Zhong, progress constant temperature carries out cooling in mold first after being cooled to 910 DEG C, and adds insulation cover slow cooling.
Embodiment 3:
A kind of high-speed high-performance bearing steel, the ingredient including following weight percent:
Carbon 0.77%；
Silicon 0.9%；
Manganese 1.0%；
Molybdenum 0.2%；
Chromium 1.4%；
Aluminium 0.015%；
Lanthanum 0.0004%；
Cerium 0.0006%；
Phosphorus < 0.01%；
Sulphur < 0.005%；
Nickel≤0.25%；
Copper≤0.2%；
Arsenic≤0.04%；
Tin≤0.03%；
Lead≤0.002%；
Titanium≤0.003%；
Calcium≤0.001%；
Remaining is iron.
The high-speed high-performance bearing steel, oxygen content are lower than 9PPM.
The high-speed high-performance bearing steel, hydrogen content are lower than 1PPM.
The preparation method of high-speed high-performance bearing steel of the present invention, successively the following steps are included:
Step 1 carries out steel scrap in EBT type electric furnace the first refining of molten steel；Coke blacking is sprayed into after melting sources makes foam
Slag, slag making height are 550~650mm, and flow slag in time and add lime 100kg and dropped phosphorus with reducing phosphorus content when slagging tap
As low as≤0.01%；Molten steel temperature, using staying steel that slag mode is stayed to tap, stays steel amount after 1590~1620 DEG C of boiling 35min degasification
It is the 8% of total tap, slag discharge amount is few as far as possible；
Step 2, in the LF ladle refining furnace that capacity and electric furnace match, slag making deoxidation, desulfurization, removing sundries；Simultaneously
Be sequentially added into ladle the ferrosilicon intermediate alloy by calculating, ferrochrome intermediate alloy, manganese iron intermediate alloy, aluminium, among ferronickel
Alloy needs to be continuously added aluminum steel in this process；In refining overall process by the air brick mounted in ladle bottom to blowing in just also
Argon gas makes molten steel obtain certain stirring kinetic energy and carries out refining liquid steel, the molten steel not exposed top of the slag controlled during blowing argon gas, and adopt
The molten steel diffusive deoxidation of top slag is carried out with iron silicon powder, carbon dust, controls temperature at 1565~1585 DEG C, subsequently into VD process；
Step 3, is vacuum-treated molten steel in VD vacuum drying oven, and molten steel is avoided to generate big boiling in the process
Argon gas 25min cleaning is blown into after keeping 15min after vacuum degree≤67Pa and strengthens molten steel；When tank side, vacuum is broken to > 98Pa
When, hydraulic system is opened, vacuum cover is promoted and removes cover vehicle after vacuum cover is raised to top, and turn off hydraulic system, then survey
Temperature determines hydrogen and takes with furnace sample, determines oxygen；Then rare-earth elements of lanthanum and cerium is added by calculation amount；It is needed during rare earth element is added
Big argon gas is opened, rare earth element is added to the exposed position of molten steel；Start to cast when molten steel temperature is at 1495 DEG C；
Step 4, casting carry out the totally-enclosed protective casting of argon gas in the cooling overall process in casting and later period；Cooled
Cheng Zhong, progress constant temperature carries out cooling in mold first after being cooled to 930 DEG C, and adds insulation cover slow cooling.
Comparative example 1:
Compared with Example 1, rare-earth elements of lanthanum and cerium are added without in preparation process；Molybdenum content is not added and controls titanium simultaneously
Content；Through detecting, rare-earth elements of lanthanum+cerium content < 1PPM, molybdenum content 5PPM, Ti content 50PPM at this time.
Comparative example 2:
Compared with Example 1, it is added without rare-earth elements of lanthanum and cerium in preparation process, through detecting, rare-earth elements of lanthanum+cerium at this time
Content < 1PPM.
Test is compared to the mechanical property of the bearing steel sample of embodiment 1 and comparative example 1-2 below, it is specific to test
Data are shown in Table 1.
Table 1: the data of mechanical of the bearing steel sample of embodiment 1 and comparative example 1-2；
Simultaneously by the bearing steel sample of embodiment 1 and comparative example 1-2 carry out service life test, specific test condition and
Data are shown in Table 2.
Table 2: the service life test data of the bearing steel sample of embodiment 1 and comparative example 1-2；
By the above test data it is recognised that 1 technical solution of the embodiment of the present invention is compared to comparative example 1-2, in mechanical property
Can have with service life aspect and be obviously improved.
Below to bearing steel preparation method of the invention and the preparation method of middle carbon used at present or carburizing bearing steel
Difference is:
Carbon or carburizing bearing steel are often easy in use although can be avoided Cracking Failure in use at present
Deform it is stuck cause operational failure or wear no resistance, service life is not also high.And middle carbon and carburizing bearing steel, to guarantee that its is resistance to
Mill property, the necessary carburizing or carbonitriding of manufacturing process, not only the production cycle is long in this way but also considerably increases manufacturing cost,
The general heat treatment cycle of carburizing or carbonitriding needs 25 hours or so；About 4 yuan of per kilogram or so of production cost, wherein at heat
The cost of reason is about 2.7 yuan of per kilogram (being calculated with the market price in December, 2018, same as below).
Heat treatment cycle 8 hours or so (time of comparative example 1-2 is shorter) of the embodiment of the present invention 1, heat treatment cost are
1.5 yuan of per kilogram or so, 1.2 yuan or so are saved compared to traditional technique per kilogram.
It can be about 1.2 hundred million yuan of save the cost in terms of being heat-treated production to produce 100,000 tons of bearing steel calculating every year.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of high-speed high-performance bearing steel, which is characterized in that the ingredient including following weight percent:
Carbon 0.77~0.85%；
Silicon 0.7~0.9%；
Manganese 1.0~1.1%；
Molybdenum 0.15~0.2%；
Chromium 1.4~1.55%；
Aluminium 0.01~0.015%；
Lanthanum+cerium 0.001~0.002%；
Phosphorus < 0.01%；
Sulphur < 0.005%；
Nickel≤0.25%；
Copper≤0.2%；
Arsenic≤0.04%；
Tin≤0.03%；
Lead≤0.002%；
Titanium≤0.003%；
Calcium≤0.001%；
Remaining is iron.
2. high-speed high-performance bearing steel as described in claim 1, which is characterized in that oxygen content is lower than 9PPM.
3. high-speed high-performance bearing steel as described in claim 1, which is characterized in that the high-speed high-performance bearing steel, hydrogen
Content is lower than 1PPM.
4. high-speed high-performance bearing steel a method according to any one of claims 1-3, which is characterized in that preparation method successively includes
Following steps:
Step 1 carries out steel scrap in EBT type electric furnace the first refining of molten steel；Coke blacking making foamed slag is sprayed into after melting sources,
Slag making height is 550~650mm, and flows slag in time and add 100~200kg of lime, to reduce phosphorus content when slagging tap, by phosphorus
It is reduced to≤0.01%；Molten steel temperature uses after 1590~1620 DEG C of boiling 25~35min degasification stays steel that slag mode is stayed to tap；
Step 2, in the LF ladle refining furnace that capacity and electric furnace match, slag making deoxidation, desulfurization, removing sundries；Simultaneously to steel
Ferrosilicon intermediate alloy, ferrochrome intermediate alloy, the manganese iron intermediate alloy, aluminium, nickel iron intermediate alloy by calculating are sequentially added in packet,
It needs to be continuously added aluminum steel in this process；Refining overall process by mounted in ladle bottom air brick to just also in blowing argon gas,
So that molten steel is obtained certain stirring kinetic energy and carry out refining liquid steel, the molten steel not exposed top of the slag is controlled during blowing argon gas, and use iron
Silicon powder, carbon dust carry out the molten steel diffusive deoxidation of top slag, control temperature at 1565~1585 DEG C, subsequently into VD process；
Step 3, is vacuum-treated molten steel in VD vacuum drying oven, and molten steel is avoided to generate big boiling true in the process
20~25min of argon gas cleaning is blown into after keeping 15~20min after reciprocal of duty cycle≤67Pa and strengthens molten steel；When tank side, vacuum is broken to >
When 98Pa, hydraulic system is opened, vacuum cover is promoted and removes cover vehicle, and turn off hydraulic system, so after vacuum cover is raised to top
Afterwards thermometric, determine hydrogen and take with furnace sample, determine oxygen；Then rare-earth elements of lanthanum and cerium is added by calculation amount；When molten steel temperature 1495~
Start to cast at 1505 DEG C；
Step 4, casting carry out the totally-enclosed protective casting of argon gas in the cooling overall process in casting and later period；In cooling procedure
In, progress constant temperature carries out cooling in mold after being cooled to 910~930 DEG C first, and adds insulation cover slow cooling.
5. high-speed high-performance bearing steel as claimed in claim 4, which is characterized in that in the step one, it is total for staying steel amount
The 8~10% of tap, slag discharge amount is few as far as possible.
6. high-speed high-performance bearing steel as claimed in claim 4, which is characterized in that in the step three, rare earth member is added
Big argon gas is needed out in the process of element, rare earth element is added to the exposed position of molten steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910046028.1A CN109825762A (en) | 2019-01-17 | 2019-01-17 | A kind of high-speed high-performance bearing steel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910046028.1A CN109825762A (en) | 2019-01-17 | 2019-01-17 | A kind of high-speed high-performance bearing steel and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109825762A true CN109825762A (en) | 2019-05-31 |
Family
ID=66860510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910046028.1A Pending CN109825762A (en) | 2019-01-17 | 2019-01-17 | A kind of high-speed high-performance bearing steel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109825762A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111334702A (en) * | 2020-03-20 | 2020-06-26 | 浙江天马轴承集团有限公司 | Preparation method of high-strength high-nitrogen rare earth stainless bearing steel |
| CN111809017A (en) * | 2020-07-23 | 2020-10-23 | 攀钢集团研究院有限公司 | Method for improving Cr yield of electric furnace |
| CN112442636A (en) * | 2020-11-23 | 2021-03-05 | 浙江宝武钢铁有限公司 | High-strength and high-toughness bearing steel for high-speed rail |
| CN112481447A (en) * | 2020-11-23 | 2021-03-12 | 浙江天马轴承集团有限公司 | Smelting process of supersaturated high-nitrogen stainless steel electrode bar |
| CN113145807A (en) * | 2021-04-27 | 2021-07-23 | 建龙北满特殊钢有限责任公司 | Rare earth bearing steel ingot for shield machine and production method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104583442A (en) * | 2012-10-19 | 2015-04-29 | 新日铁住金株式会社 | Induction-hardening steel having excellent fatigue characteristics |
| CN104846151A (en) * | 2015-06-01 | 2015-08-19 | 重庆钢铁集团设计院有限公司 | Vacuum tank vacuumizing method and liquid steel vacuum refining method thereof |
| CN106282825A (en) * | 2016-08-25 | 2017-01-04 | 浙江天马轴承有限公司 | A kind of high-speed bearing steel and preparation method thereof |
| JP2018035408A (en) * | 2016-09-01 | 2018-03-08 | 新日鐵住金株式会社 | Steel for machine structural use for induction hardening and induction-hardened steel component |
-
2019
- 2019-01-17 CN CN201910046028.1A patent/CN109825762A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104583442A (en) * | 2012-10-19 | 2015-04-29 | 新日铁住金株式会社 | Induction-hardening steel having excellent fatigue characteristics |
| US20150203943A1 (en) * | 2012-10-19 | 2015-07-23 | Nippon Steel & Sumitomo Metal Corporation | Steel for induction hardening with excellent fatigue properties |
| CN104846151A (en) * | 2015-06-01 | 2015-08-19 | 重庆钢铁集团设计院有限公司 | Vacuum tank vacuumizing method and liquid steel vacuum refining method thereof |
| CN106282825A (en) * | 2016-08-25 | 2017-01-04 | 浙江天马轴承有限公司 | A kind of high-speed bearing steel and preparation method thereof |
| JP2018035408A (en) * | 2016-09-01 | 2018-03-08 | 新日鐵住金株式会社 | Steel for machine structural use for induction hardening and induction-hardened steel component |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111334702A (en) * | 2020-03-20 | 2020-06-26 | 浙江天马轴承集团有限公司 | Preparation method of high-strength high-nitrogen rare earth stainless bearing steel |
| CN111809017A (en) * | 2020-07-23 | 2020-10-23 | 攀钢集团研究院有限公司 | Method for improving Cr yield of electric furnace |
| CN112442636A (en) * | 2020-11-23 | 2021-03-05 | 浙江宝武钢铁有限公司 | High-strength and high-toughness bearing steel for high-speed rail |
| CN112481447A (en) * | 2020-11-23 | 2021-03-12 | 浙江天马轴承集团有限公司 | Smelting process of supersaturated high-nitrogen stainless steel electrode bar |
| CN113145807A (en) * | 2021-04-27 | 2021-07-23 | 建龙北满特殊钢有限责任公司 | Rare earth bearing steel ingot for shield machine and production method thereof |
| CN113145807B (en) * | 2021-04-27 | 2023-02-28 | 建龙北满特殊钢有限责任公司 | Rare earth bearing steel ingot for shield machine and production method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109825762A (en) | A kind of high-speed high-performance bearing steel and preparation method thereof | |
| CN100453681C (en) | High boron wear-resisting casting steel and preparation process thereof | |
| CN101660097B (en) | Wear-resisting alloy steel with high boron, high chrome and low carbon and preparation method thereof | |
| CN103320720A (en) | Vanadium-containing high-boron high-chromium wear-resistant alloy and preparation method thereof | |
| CN102703816B (en) | High-carbon low-alloy wear-resistant ball steel and production process thereof | |
| CN103498107A (en) | High-boron high-chromium low-carbon high-temperature-resistant wear-resisting alloy steel and manufacturing method thereof | |
| CN108823505B (en) | Steel for rare earth alloying grinding ball and manufacturing method thereof | |
| CN1775983A (en) | High-strength casted air-colled bainite wear-resisting steel and preparing method | |
| CN103510020A (en) | Spring steel wire rod and its inclusion control method | |
| CN103498108A (en) | High-boron high-chromium low-carbon wear-resisting alloy steel with good red hardness and manufacturing method thereof | |
| CN107904498A (en) | A kind of railway freight-car carburizing bearing steel and preparation method thereof | |
| CN102653843A (en) | Carburizing bearing steel | |
| CN102652967A (en) | Method for manufacturing high-magnesium-alloy solid cored wire | |
| CN102400032B (en) | Large-cross-section nodular cast iron | |
| CN113667890A (en) | Low-silicon microalloyed high-temperature carburized gear steel and preparation method thereof | |
| CN109930059B (en) | Low-temperature high-strength high-toughness nodular cast iron, preparation method thereof and railway locomotive part | |
| CN105506442A (en) | Si-Mn alloying grinding ball iron grinding balls and preparation method thereof | |
| CN105364029A (en) | Thick-wall steel casting solidification structure refining and purifying method | |
| CN112553521A (en) | Ductile iron bearing seat and preparation method thereof | |
| CN104805368A (en) | Chromium-tungsten-manganese-rare-earth-based quasi bainitic steel and preparation method thereof | |
| CN1055507C (en) | High ductility high chromium abrasion-resistant ball for ball grinder and its manufacturing method | |
| CN113897541B (en) | High-chromium wear-resistant steel ball and casting process thereof | |
| CN109536664B (en) | Vermicular graphite cast iron vortex plate and production process thereof | |
| CN111074171A (en) | ZG130Mn8Cr2VTiRe medium manganese wear-resistant steel and preparation method thereof | |
| CN110863144A (en) | High-strength steel for oil and gas exploitation fracturing pump and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190531 |