CN106086678B - High life bearing steel material and its processing method - Google Patents
High life bearing steel material and its processing method Download PDFInfo
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- CN106086678B CN106086678B CN201610624582.XA CN201610624582A CN106086678B CN 106086678 B CN106086678 B CN 106086678B CN 201610624582 A CN201610624582 A CN 201610624582A CN 106086678 B CN106086678 B CN 106086678B
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- 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
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- 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
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
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- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/003—Cementite
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- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
Abstract
The invention discloses a kind of high life bearing steel material and its processing method, the high life bearing steel material includes following component：0.95~1.05wt% C, 0.15~0.35wt% Si, 0.25~0.45wt% Mn, 1.40~1.60wt% Cr, 0.05~0.09wt% Ni, 0.02~0.05wt% Mo ,≤0.050wt% Al, 0.05~0.08wt% Cu ,≤0.010wt% P ,≤0.008wt% S ,≤0.0025wt% Ti ,≤0.0020wt% O ,≤0.040wt% As ,≤0.030wt% Sn ,≤0.0050wt% Sb ,≤0.0020wt% Pb ,≤0.0010wt% Ca, surplus Fe.The high life bearing steel material of the present invention can reach following performance requirement：High elastic limit, tensile strength and contact fatigue strength；High hardenability and necessary quenching degree, to ensure high-wearing feature；Certain impact flexibility；Good dimensional stability or structure stability；Chemical attack can be resisted；Phenomena such as fatigue of materials peeling, stuck, lasso fracture, abrasion, corrosion can effectively be reduced.
Description
Technical field
The present invention relates to a kind of new material and its processing method for bearing steel.
Background technology
The traditional Grand Equipments and wind-power electricity generation such as China's precision machine tool, metallurgical equipment, weight equipment, high-end automobile, high speed
Emerging strategic industry such as railway and Aero-Space etc. is the mainstay industry of China's industrial system, and its middle (center) bearing is very crucial
Part, the height of its service life and reliability determines the quality of host performance to a certain extent.With China's science
The rapid development of technology, in many high-end fields, such as Aeronautics and Astronautics, traffic, the energy (wind-powered electricity generation, solar energy, nuclear power), ocean work
Journey proposes many new requirements to bearing used, and its use range also constantly expands, therefore, new to used bearing material
Performance and quality on it is also proposed more requirements, as Aero-engine Bearing needs to work under the high temperature conditions, therefore need
High-temperature bearing is wanted to manufacture；Atomic energy industry is needed using anticorrosive, resistance to irradiation and the particular/special requirement such as nonmagnetic, it is therefore desirable to is adopted
Manufactured with stainless bearing or nonmagnetic corrosion-resistant stainless bearing steel material；Various war products are also inseparable with bearing, such as aircraft, army
The sophisticated weapons such as warship, guided missile, radar, tank artillery be unable to do without bearing, and these bearings are required for using a variety of axles
Corbel material manufactures, it may be said that the application of field of bearings is more and more extensive, also more and more important, the special bearing having had at present
The species and performance of steel far can not meet its demand, therefore, it is necessary to which great dynamicses research and develop new high life bearing steel to meet
The demand of bearing industry development and scientific and technological progress and the demand for crossing national defense industry, to ensureing China's science and technology and national defense industry
Development play extremely important effect.
Minimum 500,000 kilometers with bearing service life of Foreign Automobile gear-box, domestic about 100,000 kilometers of the similar bearing life-span,
And reliability stability is poor.State's outer bearing high speed performance index D n values can reach 3.3x106, and China's like product is not more than
Cross 2.5x106；The current state's inner bearing of bearing used for high-speed railway all by import, Europe, day each 50%, constrains China's high ferro skill
The further development of art.Therefore, the crucial bearing of China's production and the bearing of Japanese, American-European Guo Deng advanced countries production are using
There is larger gap in life-span, reliability, Dn values and bearing capacity etc., have become and restrict the development of China's equipment manufacture
Bottleneck.
Either China's national standard, or the standard of the advanced country such as Japan, America and Europe, using containing C1.0%, Cr1.5% as
The high-carbon-chromium bearing steel of representative, it is born so far from it, chemical element has almost no change, but with the swift and violent hair of science and technology
Exhibition, very harsh requirement is proposed to bearing, while improving velocity of rotation, improving operating temperature, is also required higher
Reliability and life-span；The continuous increase of bearing size, it is desirable to higher quenching degree；The appearance of office automated machine, it is desirable to right
The suppression of small size bearing noise.Due to the requirement more and more higher to bearing, bearing material must possess high cleanliness, high reliability
And high fatigue life.
The content of the invention
It is an object of the invention to provide the high bearing steel YX new materials of a kind of high-purity, high life, high reliability and its add
Work method, research and development and the production of the new material are a directions of domestic and international bearing steel development, can accelerate to shorten China's bearing steel
Kind, quality and external gap in kind, after the country realizes industrialization, can substitute import, be mainly used in a certain extent
, there are fabulous market prospects in the fields such as each famous brand name car motor machine bearing, military project and precision optical machinery bearing.
The purpose of the present invention is achieved through the following technical solutions：
A kind of high life bearing steel material, includes following component：0.95~1.05wt% C, 0.15~0.35wt%
Si, 0.25~0.45wt% Mn, 1.40~1.60wt% Cr, 0.05~0.09wt% Ni, 0.02~0.05wt%
Mo ,≤0.050wt% Al, 0.05~0.08wt% Cu ,≤0.010wt% P ,≤0.008wt% S ,≤
0.0025wt% Ti ,≤0.0020wt% O ,≤0.040wt% As ,≤0.030wt% Sn ,≤0.0050wt%'s
Sb ,≤0.0020wt% Pb ,≤0.0010wt% Ca, surplus Fe.
A kind of production method of above-mentioned high life bearing steel material, including two kinds of process routes, wherein：
Process route 1 is as follows：Converter+LF+RH+ billet continuous castings (250 × 280mm2) → continuous casting billet strips off the skin processing → electroslag
Remelting → cover is cold/cheat cold → hammer cogging (230*230mm2~245*245mm2) → annealing/slow cooling → inspection cleaning → heating →
Rolling → heap is cold or slow cooling → aligning → polishing (stripping off the skin) → flaw detection → cleaning, checking → is submitted, wherein, hammer cogging high temperature is equal
The temperature of matter is 1200~1220 DEG C, can be raised within 2 hours before forging 1220 ± 10 DEG C, and forging uses " upsetting one is pulled out " mode,
With arc upset plate jumping-up；The heating maximum temperature of rolling is 1200~1220 DEG C, and the soaking zone heat time is more than 110 minutes；
Total heat time is more than 330 minutes.
Process route 2 is as follows：Converter/electric furnace+LF+VD/RH+ billet continuous castings (250*280mm2) → slow cooling → steel rolling heating
→ 825 cogging (220*220mm2Emerging heating → rolling → slow cooling → reconditioning → flaw detection → the cleaning in) → slow cooling → cleaning → north, inspection
Look into → submit, wherein, the maximum heating temperature of cogging is 1230~1240 DEG C, and the High temperature diffusion time is more than 6 hours, and rolling adds
Hot maximum temperature is 1200~1220 DEG C, and the soaking zone heat time is more than 110 minutes；Total heat time is more than 330 minutes.
The high life bearing steel new material of the present invention adds Ni, Mo element, together on the basis of traditional bearing Steel material
Shi Yange controls Al content, using above two process route bearing steel material can be made to reach following performance requirement：
(1) high elastic limit, tensile strength and contact fatigue strength；
(2) high hardenability and necessary quenching degree, to ensure high-wearing feature, its hardness is (HRC) 61~65；
(3) certain impact flexibility；
(4) good dimensional stability or structure stability；
(5) chemical attack can be resisted；
(6) phenomena such as can effectively reducing fatigue of materials peeling, stuck, lasso fracture, abrasion, corrosion.
The present invention adds Ni, Mo element on the basis of raw material, while strictly controls Al content, the low power of material
The performance indications such as tissue, non-metallic inclusion, distribution of carbides entirely reach design objective.
The high life bearing steel YX new material of the present invention is cheated cold after rolling, and resulting is organized as sheet pearlite
With network cementite, this tissue is hard and crisp, is not only difficult to machining, and it is also yielding in quenching process afterwards and
Cracking.But what is obtained through nodularization isothermal annealing is globular pearlite tissue, and cementite therein is in spherical particle, and Dispersed precipitate exists
It is lower than not only hardness with lamellar pearlite on ferrite matrix, it is easy to machining, and in Quench heating, austenite crystal
Grain is not easy to grow up, and workpiece is not easy to deform and ftractureed during cooling.
As defined in the leading indicator apparently higher than GB/T18245-2002 of the high life bearing steel YX new material of the present invention
GCr15 material standards, leading indicator contrast are as shown in table 1.
Table 1YX new materials contrast with GCr15 materials leading indicator as defined in GB/T 18245-2002
Brief description of the drawings
Fig. 1 is the C curve of YX steel；
Fig. 2 is the Forge Heating curve of YX process routes 1；
Fig. 3 is that YX process routes 1 roll heating curves；
Fig. 4 is that YX process routes 2 roll heating curves；
Embodiment
Technical scheme is further described below in conjunction with the accompanying drawings, but is not limited thereto, it is every to this
Inventive technique scheme is modified or equivalent substitution, without departing from the spirit and scope of technical solution of the present invention, all should cover
In protection scope of the present invention.
Embodiment one：Present embodiments provide for a kind of high life bearing steel material YX, by it into setting up separately
Meter, makes new material reach following performance requirement：
(1) high elastic limit, tensile strength and contact fatigue strength；
(2) high hardenability and necessary quenching degree, to ensure high-wearing feature, its hardness is：(HRC) 61~65；
(3) certain impact flexibility；
(4) good dimensional stability (or structure stability), this is especially important to precision bearing；
(5) chemical attack be resisted when with the contact of big or lubricating oil；
(6) good processing performance, to meet the needs of large-scale production.
YX Bearing Materials in present embodiment, indices are superior to GCr15 under GB/T18254-2002 standards.
In order to realize above-mentioned technique effect, the technical scheme that present embodiment is taken is as follows：
First, new material design object
(1) composition
YX new material compositions are as shown in table 2.
Table 2YX new material compositions
| C | Si | Mn | Cr | Ni | Mo | Al | Cu | P | S | Ti | O | As | Sn | Sb | Pb | Ca |
| 0.95 | 0.15 | 0.25 | 1.40 | 0.05 | 0.02 | ≤ | 0.05 | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ |
| 1.05 | 0.35 | 0.45 | 1.60 | 0.09 | 0.05 | 0.050 | 0.08 | 0.010 | 0.008 | 0.0025 | 0.0020 | 0.040 | 0.030 | 0.0050 | 0.0020 | 0.0010 |
(2) low power
Macrostructure center porosity, General Loosen and segregation are not schemed by GB/T18254-2002 the 1st, the 2nd and 3rd level respectively
Grading, 1.0 grades all should be not more than, be not allow for general freckle type segregation and edge freckle type segregation.
(3) non-metallic inclusion
1) conventional non-metallic field trash is evaluated by the rank figure of GB/T18254-2002 appendix As the 4th, and DS presses ISO 4967
Evaluation, evaluation result should meet table 3 and provide.
The qualified rank of the non-metallic inclusion of table 3 (being not more than)
2) non-metallic inclusion TiN criterion：
1. form：Square or squarish, corner or sharp-featured individual particle field trash.
2. do not allow the TiN field trashes for 2 length of side ＜, 19 μm or 1 length of side >=19 μm occur in a visual field.
(4) carbide inhomogeneities
1) carbide strip
Evaluated by the rank figure of GB/T 18254-2002 appendix As the 8th, its qualified rank is not more than 2.0.
2) carbide liquid-extraction
Evaluated by the rank figure of GB/T 18254-2002 appendix As the 9th, its qualified rank is not more than 1.0.
(5) ultrasonic examination
It is qualified according to the standard ratings of SEP 1921, A/a levels.
2nd, YX new materials composition design
(1) corrosion-resistant, wear-resisting, antifatigue element determines
Corrosion-resistant, wear-resisting, the antifatigue element of YX new materials determines as shown in table 4.
The determination of the new material each element of table 4
Design of Chemical Composition explanation：
High life bearing steel material composition design key is to ensure to obtain high elastic limit, tensile strength and contact tired
Labor intensity, high hardenability and necessary quenching degree, to ensure high-wearing feature, certain impact flexibility；Good dimensionally stable
Property or structure stability；Chemical attack can be resisted；Fatigue of materials peeling, stuck, lasso fracture, abrasion, corrosion can effectively be reduced
Phenomena such as.
1) control interval of carbon component
Carbon be influence steel performance important element, be ensure bearing steel can possess enough quenching degree, hardness number and
One of important element of wearability.Carbon invigoration effect is very high, phosphorus content increase in steel, yield point and tensile strength rise, but
Toughness is significantly reduced, in order to improve the safety and reliability that bearing steel uses, while carbon is improved, is come by alloying
Intensity is improved, i.e., by existing GCr15 0.93~1.05%, is designed to 0.95~1.05%, Composition Control 0.98~1.01%,
Controlled by lower limit, reduce strand carbon segregation, improve the uniformity of carbide.
2) Mn, Cr, Ni, Mo, Al element specification
Chromium is carbide former, and main function is the quenching degree and decay resistance for improving steel, and can be improved
Intensity, hardness, wearability, elastic limit and yield limit.The distribution of steel grade carbide and its size of particle can be significantly changed,
Make the cementite carbide size (FeCr) containing chromium3C annealing aggregation tendentiousness diminish, be bearing steel carbide become it is tiny,
It is evenly distributed and expands the temperature range of spheroidizing.Chromium can also reduce the fast to overheat tendency and skin decarburization of steel
Degree.Cr is controlled, by increasing capacitance it is possible to increase the quenching degree and wearability of steel, carry by 1.40~1.60% designs by 1.50~1.55%
High-dimensional stability or structure stability, the resistance to corrosion and antioxidation of steel can be improved；And too high chromium can be prevented
Content easily forms bulk carbide.
Manganese significantly improves the quenching degree of steel, and part manganese, which is dissolved in ferrite, improves ferritic hardness and intensity, and energy
Enough fixed steel grade S form simultaneously forms the small MnS sulfides of the performance hazards to steel, can reduce or suppress FeS life
Into.Mn can improve the intensity of steel, weaken and eliminate the harmful effect of sulphur, improve and melt invigoration effect admittedly, and can improve quenching for steel
Permeability, yield strength and tensile strength, this steel grade are designed to be divided into 0.25~0.45% as needed, by middle upper limit control composition
0.35~0.40%, to ensure steel grade retained austenite quantity, the superheated susceptivity of stabilized steel, crack tendence and size are steady
It is qualitative.But these elements of Cr and Mn can make material increase temper brittleness sensitiveness, i.e. Transition of Brittleness temperature at 250~450 DEG C in steel
While degree rises, the impact value and Fracture Toughness of Ductile rupture decline, and in order to reduce the adverse effect of manganese, this just needs to increase
Add Mo elements, its content range is 0.02~0.05%, improves quenching degree, anti-temper resistance, refines annealed structure, and reduction is quenched
Fire deformation, fatigue strength is improved, improve mechanical property.
Ni is to improve the maximally effective alloying element of steel toughness, the mechanism of its toughening is according to 0.05~0.09% design
Material matrix is set to be easy to cross-slip at low temperature in itself, no matter to which kind of tissue, toughness can be improved by adding Ni.Cu+ simultaneously
Mo+Cu elements design control interval, can obtain comprehensive corrosion resisting property more more preferable than Cu+Ni, so Cu presses 0.05~0.08%
Design, the corrosion-resistant stability enhancing of steel.
Al content is designed to that, no more than 0.050%, steel can be avoided because grain size Coarsening Temperature is low, the quality of open grain structure
Problem, make the infusible compound AlN that enough small and dispersed distributions are formed in steel, and tiny, disperse carbon, nitride V (C, N)
Austenite Grain Growth is prevented together, and grain size number can bring up to >=8.5 grades, more brilliant than GCr15 under GB/T18254-2002
Granularity improves 0.5 rank.
The composition design can be such that the comprehensive mechanical performance of new material is significantly improved than former GCr15 steel, so as to meet bearing steel
In high life, the needs of high reliability.
3) design standard
According to the chemical element of determination, YX new material composition design standards are as shown in table 5.
Table 5YX new material composition design standards
| C | Si | Mn | Cr | Ni | Mo | Al | Cu | P | S | Ti | O | As | Sn | Sb | Pb | Ca |
| 0.95 | 0.15 | 0.25 | 1.40 | 0.05 | 0.02 | ≤ | 0.05 | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ |
| 1.05 | 0.35 | 0.45 | 1.60 | 0.09 | 0.05 | 0.050 | 0.08 | 0.010 | 0.008 | 0.0025 | 0.0020 | 0.040 | 0.030 | 0.0050 | 0.0020 | 0.0010 |
YX new materials experiment heat (batch) number composition detection value is as shown in table 6.
Table 6YX new materials test composition detection value
4) C curve of YX steel
Designed according to mentioned component, the C curve of the YX steel measured is as shown in Figure 1.
3rd, YX test checks provide
New material quantity of sampling quantity, sampling point and the method for inspection are detailed such as table 7 below.
The quantity of sampling quantity of table 7, sampling point and the method for inspection
4th, YX heats the theoretical foundation and principle of technique
1441 DEG C of YX liquidus temperatures, it is allowed to heating-up temperature be up to 1241 DEG C.Because the burnt temperature of steel compares fusing point
Low 100~150 DEG C, overtemperature is lower than burnt temperature about 50 DEG C, is melted so the heating and thermal insulation maximum temperature of steel should typically be less than
200 DEG C of point (or less than state diagram solidus temperature).
5th, YX forgings, rolling, heating technological design
(1) forging, the rolling heating technological design of YX process routes 1
1) YX Forge Heatings curve such as Fig. 2：
High temperature homogenization temperature must be controlled within 1200-1220 DEG C of temperature range, can be raised to 1220 within 2 hours before forging
±10℃.Forging uses " upsetting one is pulled out " mode, with arc upset plate jumping-up.It is swaged into size 230*230-245*245mm2.Forging
Soft annealing processing is carried out afterwards or hole is cold, prevents billet surface crackle.
2) YX rollings heating technological design is as shown in table 9, table 10.
The hot-working skill (operation of rolling whole process wears water) DEG C of table 9YX bearing steels
| Blank | Shove charge state | Tap the cycle | Preheating section | 1 section of heating | 2 sections of heating | Soaking zone | Tapping temperature |
| 230-245mm2 | Cold charge | >=120 seconds/ | ≤800 | 900-1120 | 1200-1220 | 1180~1200 | 1180~1200 |
2 sections of heat times of heating are more than 100 minutes；The soaking zone heat time is more than 110 minutes；Total heat time is more than
330 minutes.
The hot-working skill (operation of rolling whole process wears water) DEG C of table 10YX bearing steels
| Technological parameter | Heating and thermal insulation temperature (selection section) | Start rolling temperature (after water under high pressure removes unicorn) | Finishing temperature |
| Steel billet | 1200~1240 DEG C | 1116℃ | 780℃ |
(2) cogging, the rolling heating technological design of YX process routes 2
1) YX cogging heating-up temperature is as shown in Figure 3.
Cogging is into 220*220mm2Side, rolls rear slow cooling.Rolling specs ＞ Φ 70mm High temperature diffusions controlled by 8 hours.≤Φ
The 70mm High temperature diffusion times controlled by 6 hours, 1230-1240 DEG C of High temperature diffusion temperature.
2) YX rolling heating-up temperature rolling heating technological design is as shown in table 11, table 12.
The hot-working skill (operation of rolling whole process wears water) DEG C of table 11YX bearing steels
| Blank | Shove charge state | Tap the cycle | Preheating section | 1 section of heating | 2 sections of heating | Soaking zone | Tapping temperature |
| 220*220mm2 | Cold charge | >=120 seconds/ | ≤800 | 900-1120 | 1200-1220 | 1180~1200 | 1180~1200 |
2 sections of heat times of heating are more than 100 minutes；The soaking zone heat time is more than 110 minutes；Total heat time is more than
330 minutes.
The hot-working skill (operation of rolling whole process wears water) DEG C of table 12YX bearing steels
| Technological parameter | Heating and thermal insulation temperature (selection section) | Start rolling temperature (after water under high pressure removes unicorn) | Finishing temperature |
| Steel billet | 1200~1240 DEG C | 1116℃ | 780℃ |
6th, GCr15 materials contrast under the conditions of YX new materials and GB/T18254-2002
YX new materials contrast with GCr15 materials under the conditions of GB/T18254-2002, and chemical composition has substantial difference, increase
Ni, Mo element are added, while have strictly controlled Al content, steel combination property is significantly increased, and testing result is as follows.
(1) macrostructure is to such as table 13
The macrostructure situation of table 13
(2) level of inclusions is to such as table 14
The non-metallic inclusion of table 14 contrasts situation
(3) distribution of carbides is to such as table 15
The distribution of carbides situation of table 15 contrasts
Embodiment two：Present embodiment is unlike embodiment one：High life bearing steel material bag
Containing following component：0.95wt% C, 0.25wt% Si, 0.40wt% Mn, 1.45wt% Cr, 0.08wt% Ni,
0.04wt% Mo, 0.045wt% Al, 0.06wt% Cu, 0.005wt% P, 0.006wt% S, 0.0020wt%
Ti, 0.0015wt% O, 0.035wt% As, 0.020wt% Sn, 0.0040wt% Sb, 0.0010wt% Pb,
0.0004wt% Ca, surplus Fe.
Embodiment three：Present embodiment is unlike embodiment one：High life bearing steel material bag
Containing following component：1.00wt% C, 0.30wt% Si, 0.35wt% Mn, 1.50wt% Cr, 0.06wt% Ni,
0.05wt% Mo, 0.040wt% Al, 0.07wt% Cu, 0.008wt% P, 0.005wt% S, 0.0015wt%
Ti, 0.0010wt% O, 0.030wt% As, 0.025wt% Sn, 0.0035wt% Sb, 0.0015wt% Pb,
0.0008wt% Ca, surplus Fe.
Embodiment four：Present embodiment is unlike embodiment one：High life bearing steel material bag
Containing following component：1.05wt% C, 0.20wt% Si, 0.30wt% Mn, 1.55wt% Cr, 0.07wt% Ni,
0.03wt% Mo, 0.035wt% Al, 0.08wt% Cu, 0.006wt% P, 0.007wt% S, 0.0010wt%
Ti, 0.0012wt% O, 0.025wt% As, 0.015wt% Sn, 0.0045wt% Sb, 0.0018wt% Pb,
0.0006wt% Ca, surplus Fe.
Claims (4)
1. a kind of processing method of high life bearing steel material, it is characterised in that the process route of the processing method is as follows：Turn
Stove+LF+RH+ billet continuous castings → continuous casting billet strip off the skin processing → electroslag remelting → cover it is cold/cheat cold → hammer cogging → annealing/slow cooling →
Check that cleaning → heating → rolling → heap is cold or slow cooling → aligning → polishing → flaw detection → cleaning, checking → is submitted；The forging
The temperature of cogging high temperature homogenization is 1200~1220 DEG C, is raised within 2 hours before forging 1220 ± 10 DEG C, forging uses " a upsetting one
Pull out " mode, with arc upset plate jumping-up；The heating maximum temperature of rolling is 1200~1220 DEG C, and the soaking zone heat time is more than
110 minutes；Total heat time is more than 330 minutes；High life bearing steel material includes following component：0.95~1.05wt% C,
0.15~0.35wt% Si, 0.25~0.45wt% Mn, 1.40~1.60wt% Cr, 0.05~0.09wt% Ni,
0.02~0.05wt% Mo ,≤0.050wt% Al, 0.05~0.08wt% Cu ,≤0.010wt% P ,≤
0.008wt% S ,≤0.0025wt% Ti ,≤0.0020wt% O ,≤0.040wt% As ,≤0.030wt%'s
Sn ,≤0.0050wt% Sb ,≤0.0020wt% Pb ,≤0.0010wt% Ca, surplus Fe.
2. the processing method of high life bearing steel material according to claim 1, it is characterised in that the high life bearing
Steel material includes following component：0.95wt% C, 0.25wt% Si, 0.40wt% Mn, 1.45wt% Cr,
0.08wt% Ni, 0.04wt% Mo, 0.045wt% Al, 0.06wt% Cu, 0.005wt% P, 0.006wt%'s
S, 0.0020wt% Ti, 0.0015wt% O, 0.035wt% As, 0.020wt% Sn, 0.0040wt% Sb,
0.0010wt% Pb, 0.0004wt% Ca, surplus Fe.
3. the processing method of high life bearing steel material according to claim 1, it is characterised in that the high life bearing
Steel material includes following component：1.00wt% C, 0.30wt% Si, 0.35wt% Mn, 1.50wt% Cr,
0.06wt% Ni, 0.05wt% Mo, 0.040wt% Al, 0.07wt% Cu, 0.008wt% P, 0.005wt%'s
S, 0.0015wt% Ti, 0.0010wt% O, 0.030wt% As, 0.025wt% Sn, 0.0035wt% Sb,
0.0015wt% Pb, 0.0008wt% Ca, surplus Fe.
4. the processing method of high life bearing steel material according to claim 1, it is characterised in that the high life bearing
Steel material includes following component：1.05wt% C, 0.20wt% Si, 0.30wt% Mn, 1.55wt% Cr,
0.07wt% Ni, 0.03wt% Mo, 0.035wt% Al, 0.08wt% Cu, 0.006wt% P, 0.007wt%'s
S, 0.0010wt% Ti, 0.0012wt% O, 0.025wt% As, 0.015wt% Sn, 0.0045wt% Sb,
0.0018wt% Pb, 0.0006wt% Ca, surplus Fe.
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| CN107119239A (en) * | 2017-04-11 | 2017-09-01 | 龙南日升昌新材料研发有限公司 | Bearing steel and preparation method thereof |
| WO2018188008A1 (en) * | 2017-04-13 | 2018-10-18 | 龙南日升昌新材料研发有限公司 | Bearing steel and preparation method therefor |
| CN107904497B (en) * | 2017-12-13 | 2019-11-22 | 西王金属科技有限公司 | A kind of high life bearing steel and its manufacturing method |
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| CN114769314A (en) * | 2022-03-29 | 2022-07-22 | 江苏永钢集团有限公司 | Production method of low-rolling-ratio high-density grinding ball steel hot-rolled round steel |
| CN115216587B (en) * | 2022-06-02 | 2023-11-24 | 大冶特殊钢有限公司 | Method for improving composition and structure uniformity of large-scale cast steel ingot of high-carbon chromium bearing steel and high-carbon chromium bearing steel |
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