CN107350445A - The production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets - Google Patents
The production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets Download PDFInfo
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- CN107350445A CN107350445A CN201710454320.8A CN201710454320A CN107350445A CN 107350445 A CN107350445 A CN 107350445A CN 201710454320 A CN201710454320 A CN 201710454320A CN 107350445 A CN107350445 A CN 107350445A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
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Abstract
The present invention relates to a kind of production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets, this method comprises the following steps：Smelting low carbon, the first steel-making water of low-phosphorous, low harmful element content in electric arc furnaces；Deoxidation, desulfurization and alloying are carried out in ladle refining furnace, carries out vacuum outgas in VD stoves, after VD vacuum outgas, bull ladle removes continuous casting；Big Baogang's water is injected in tundish by the long nozzle with blowing argon, and molten steel in mold is cooled down by a cold-zone, and electromagnetic agitation is carried out to molten steel by external M-emss；Strand is cooled down and solidified on the direction vertical with pouring steel platform；Strand cuts into scale strand in vertical direction through the flame cutting machine synchronous with casting speed, and ejection on ejection roller way is hung to by hook steel machine；Strand enters to cheat slow cooling or directly hot sending forging after ejection.It is an object of the invention to provide a kind of carburizing bearing steel G20Cr2Ni4 continuous cast round billets methods that blank volume recovery is high and production cost is low.
Description
Technical field
The invention belongs to metallurgical technology field, relates generally to a kind of production of carburizing bearing steel G20Cr2Ni4 continuous cast round billets
Method.
Background technology
G20Cr2Ni4 is a kind of conventional carburizing structural alloy steel, and case hardness, wearability and contact are tired after Carburization Treatment
Labor intensity is high, and center portion also remains with good toughness, and anti impulsion load is good, is generally used for the large size bearing of anti impulsion load,
Or the axle material and gear material of tank, bull-dozer etc..
Because continuous casting is compared with molding, the pouring type and solidification principle of molten steel are different, and continuous casting billet has component segregation, the heart
The shortcomings that portion's compactness difference, existing continuous casting technology production can not meet the complicated condition of work requirement of G20Cr2Ni4 steel, current line
G20Cr2Ni4 carburizing bearing steels further improve cleaning using after molding production or molding using the method for electroslag remelting more in the industry
Degree.But when molding production, even with good molding casting means, mouth of a river steel stream still inevitably connects with air
Touch, cause secondary oxidation, feed trumpet, the refractory material of soup road system can also pollute the molten steel of the high purity through external refining.
Substantial amounts of field sampling measure confirms that, by the molten steel of die casting system, either gas or inclusion content all terminates than refining
Shi Gao, and steel ingot or ESR ingot are both needed to crop, back-end crop, forge volume recovery only 80%, and continuous casting billet production efficiency is high, without crop,
Back-end crop, volume recovery is forged up to more than 90%.
Accordingly, it is desirable to provide a kind of continuous cast method for being capable of stability contorting component segregation of continuous casting slab and center portion compactness, with
Steel ingot or ESR ingot are substituted to meet the requirement of the complicated conditions of work of carburizing bearing steel G20Cr2Ni4.
The content of the invention
It is an object of the invention to overcome the carburizing bearing steel G20Cr2Ni4 round billet compositions under the above-mentioned existing mode of production inclined
Analysis, center portion compactness difference and molding produce the problem of cleanliness factor is low, volume recovery is low and provide a kind of blank volume recovery height and produce
The low carburizing bearing steel G20Cr2Ni4 continuous cast round billets methods of cost.
To achieve these goals, the present invention adopts the following technical scheme that：A kind of carburizing bearing steel G20Cr2Ni4 continuous castings
The production method of round billet, this method comprise the following steps：
1）Smelting low carbon, the first steel-making water of low-phosphorous, low harmful element content in electric arc furnaces；
2）Deoxidation, desulfurization and alloying are carried out in ladle refining furnace, vacuum outgas is carried out in VD stoves, after VD vacuum outgas, hangs
Bag removes continuous casting；
3）Big Baogang's water is injected in tundish by the long nozzle with blowing argon, in casting process, by steel in tundish
The water degree of superheat is controlled at 20~35 DEG C；Molten steel in mold is cooled down by a cold-zone, and molten steel in mold is crystallized by external
Device magnetic stirrer carries out electromagnetic agitation to molten steel；Blank drawing machine is with 0.1~0.5m/min casting speed throwing；Strand walking side
To vertical with pouring steel platform；Two cold-zones points three sections cool down to round billet, its Zhong-1 block be at crystallizer foot roll water-spraying control,
Area of 2nd area three is aerosol water-spraying control, and specific water is controlled in 0.1~0.4L/kg；Stream magnetic stirrer is cast two by external
Cold house bottom carries out electromagnetic agitation to molten steel, to form more equiax crystal and reduce normal segregation at the radius of round billet 1/2；Strand exists
Cooled down and solidified on the direction vertical with pouring steel platform；Strand is through the flame cutting machine synchronous with casting speed in Vertical Square
Scale strand is cut into upwards, roller-way is tumbled to horizontal roller through tumbling, and ejection on ejection roller way is hung to by hook steel machine；Ejection
Strand enters to cheat slow cooling or directly hot sending forging afterwards.
Using the smelting mode of electric arc furnaces+ladle refining furnace+VD stove vacuum outgas, the carburizing bearing steel of smelting
G20Cr2Ni4 chemical compositions are by mass percentage：C=0.17~0.23%, Si=0.15 ~ 0.40%, Mn=0.30 ~ 0.60%, P≤
0.020%, S≤0.015%, Ni=3.25 ~ 3.75%, Cr=1.25% ~ 1.75%, Cu≤0.25%, Al=0.010 ~ 0.030%, surplus
For Fe and other inevitable impurity.
The big bag of casting process uses long nozzle and long nozzle blowing argon to tundish, and argon flow amount is 80~120l/
min；Tundish uses stopper Argon, and argon flow amount is 2~6l/min.
In casting process, tundish adds alkaline covering agent and carbonization rice husk to reduce the thermal radiation loss of molten steel and protection
For molten steel not by secondary oxidation, the main component of alkaline covering agent used is CaO：50~60%, Al2O3：25~35%, MgO：2~
4%、SiO2≤4.0%、Fe2O3＜ 1.5% and H2O≤0.5%。
Crystallizer molten steel is protected using submersed nozzle and into crystallizer by the way of addition covering slag, leaching used
It is integral water gap to enter the formula mouth of a river.
The basicity of crystallizer protecting residue used is 0.92~0.99, and fusion temperature is 1140~1170 DEG C, viscosity 12.34
Pool.
M-EMS uses external agitator, and stirring frequency is 1~2Hz, and stir current is 200~600A.
Casting stream electromagnetic agitation uses external agitator, and stirring frequency is 5~12Hz, and stir current is 60~300A.
Casting speed is 0.1~0.5m/min, is determined according to different section, and Blank drawing machine is clamped using 3 rollers, wherein 1
For fixing roller, 2 are adjustable roller；Different section refers to the diameter of continuous cast round billets, minimum φ 400mm, maximum φ 800mm；It is disconnected
During a diameter of φ 400mm in face, when casting speed 0.5m/min, cross section diameter are φ 800mm, casting speed 0.1m/min.
Between 400~800mm of φ, the round billet produces the diameter of the round billet on vertical casting machine.
Good effect is as follows caused by technical scheme：Carburizing bearing steel G20Cr2Ni4 is adopted current line more in the industry
Produced with static ingot or electroslag remelting, carburizing bearing steel G20Cr2Ni4 continuous cast round billets produced by the invention, using two-stage electromagnetic
Stirring, during molding casting effect it is good, Control for Oxygen Content is low, and blank volume recovery is high, and production cost is low, using cooling and solidification
All symmetrical vertical continuous casting method production, chemical composition uniformity is good, and solidified structure symmetry is good, without bending and aligning, nothing
The problem of outer arc side chemical component difference and field trash are inclined to inner arc side in obvious, steel ingot or ESR ingot can be replaced to be used for carburizing
The production of bearing steel.
Embodiment
Technical scheme is further elaborated and illustrated with reference to embodiment.
The production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets, using electric arc furnaces+ladle refining furnace+VD stove vacuum
The smelting mode of degassing；The carburizing bearing steel G20Cr2Ni4 compositions of smelting are by mass percentage：C=0.17~0.23%, Si=
0.15 ~ 0.40%, Mn=0.30 ~ 0.60%, P≤0.030%, S≤0.030%, Ni=3.25 ~ 3.75%, Cr=1.25% ~ 1.75%, Cu
≤ 0.25%, Al=0.010 ~ 0.030%, surplus are Fe and other inevitable impurity elements.The production craft step of this method
It is as follows：
1）Electric arc furnaces just refines：Using 60t electric arc furnace smeltings, furnace charge is by two level steel scrap 35t, carbon junction steel material head 10t, nickel-contained pig iron
20t is formed；Arc furnace tapping condition：Terminal [C]：0.03%、[P]：0.004%, 1660 DEG C of tapping temperature, 1/4~3/4 mistake of tapping
Aluminium block 80kg, ferrosilicon 75kg, lime 300kg and 500kg ferrochrome are added in journey in ladle；
2）LF refining：Transfer LF stations after electric furnace steel tapping to be refined, add the deoxidiers such as lime 600kg, carbon dust, ferrosilicon powder
150kg deoxidations, rear 1600 DEG C of temperature samples accurate adjustment compositions to slag in vain；
3）VD vacuum outgas：1680 DEG C of temperature enters vacuum tank and deaerated, and in 20 minutes vacuum≤0.5 Torr lower retention times, breaks
Determine hydrogen online after sky, [H]：1.0ppm, the weak mixing time of Argon 20 minutes before tapping, continuous casting on 1580 DEG C of bull ladles of temperature；
4）Continuous casting：Molten steel is φ 400mm strands in vertical casting machine upper, and ladle is hung on ladle turret, by returning
Turntable is gone to above tundish, and molten steel is injected in tundish by the long nozzle with blowing argon, argon blowing rate 100l/
Min, molten steel is protected using alkaline covering agent and carbonization rice husk in tundish, controls 20~30 DEG C of the degree of superheat in tundish, alkalescence
Coverture can adsorb foreign substance in molten steel, improve Molten Steel Cleanliness, and the main component of alkaline covering agent used is CaO：50~
60%、Al2O3：25~35%, MgO：2~4%, SiO2≤4.0%、Fe2O3＜ 1.5% and H2O≤0.5%；Stopper is used in tundish
Argon, argon blowing rate 3l/min, Metal in Tundish are injected in crystallizer by monoblock type submersed nozzle；In crystallizer plus tie
Brilliant device protects flux shielding, and the basicity of crystallizer protecting residue used is 0.92~0.99, and fusion temperature is 1140~1170 DEG C, viscosity
For 12.34 pools；Molten steel quickly forms green shell, crystallizer cooling water flow 1850l/min under crystallizer cooling water cooling condition；
Molten steel in mold carries out electromagnetic agitation, stirring frequency 2.0Hz, stirring to molten steel by external M-emss
Electric current is 400A；Blank drawing machine is with 0.40~0.50m/min casting speed throwing；Strand direction of travel is vertical with pouring steel platform；
Three sections of two cold-zones point cool down to round billet, specific water 0.28l/kg, and its Zhong-1 block is the water-spraying control at crystallizer foot roll,
Cooling water inflow accounting 27%, 2nd area are aerosol water-spraying control, cooling water inflow accounting 46%, and 3rd area are aerosol water-spraying control, cooling water
Measure accounting 27%；Stream magnetic stirrer is cast by external electromagnetic agitation, stirring frequency are carried out to molten steel at away from meniscus 4.3m
For 12Hz, stir current 100A；Strand cuts into 6m length in vertical direction through the flame cutting machine synchronous with casting speed
Scale strand, through tumbling, roller-way is tumbled to horizontal roller, and ejection on ejection roller way is hung to by hook steel machine；Strand enters hole after ejection
Slow cooling is handled；
5）After slow cooling from same flow strand head, in, afterbody sampling Detection low power, gas and carbon segregation index results see the table below 1, table
2nd, table 3：
The low power testing result of table 1（Level）
The oxygen content testing result of table 2（ppm）
The carbon segregation index of table 3
From the point of view of the data of table 1, by the product of the present embodiment production, macrostructure is fine and close, and center porosity rank is relatively low, no shrinkage cavity,
Centre burst, middle crack, subcrack, rimhole defect.
From the point of view of table 2, the data of table 3, by the product of the present embodiment production, Control for Oxygen Content is in reduced levels, total cross-section carbon
It is segregated index, the control of Central Carbon Segregation index preferably.
In addition, the product produced by embodiments of the invention, is detected every after carburizing bearing steel is processed into user's forging
Index meets the requirements, and is entirely capable of the production for meeting carburizing bearing steel.
Claims (10)
- A kind of 1. production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets, it is characterised in that：This method includes following step Suddenly：1）Smelting low carbon, the first steel-making water of low-phosphorous, low harmful element content in electric arc furnaces；2）Deoxidation, desulfurization and alloying are carried out in ladle refining furnace, vacuum outgas is carried out in VD stoves, after VD vacuum outgas, hangs Bag removes continuous casting；3）Big Baogang's water is injected in tundish by the long nozzle with blowing argon, in casting process, by steel in tundish The water degree of superheat is controlled at 20~35 DEG C；Molten steel in mold is cooled down by a cold-zone, and molten steel in mold is crystallized by external Device magnetic stirrer carries out electromagnetic agitation to molten steel；Blank drawing machine is with 0.1~0.5m/min casting speed throwing；Strand walking side To vertical with pouring steel platform；Two cold-zones points three sections cool down to round billet, its Zhong-1 block be at crystallizer foot roll water-spraying control, Area of 2nd area three is aerosol water-spraying control, and specific water is controlled in 0.1~0.4L/kg；Stream magnetic stirrer is cast two by external Cold house bottom carries out electromagnetic agitation to molten steel, to form more equiax crystal and reduce normal segregation at the radius of round billet 1/2；Strand exists Cooled down and solidified on the direction vertical with pouring steel platform；Strand is through the flame cutting machine synchronous with casting speed in Vertical Square Scale strand is cut into upwards, roller-way is tumbled to horizontal roller through tumbling, and ejection on ejection roller way is hung to by hook steel machine；Ejection Strand enters to cheat slow cooling or directly hot sending forging afterwards.
- 2. the production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets according to claim 1, it is characterised in that：Adopt With the smelting mode of electric arc furnaces+ladle refining furnace+VD stove vacuum outgas, the carburizing bearing steel G20Cr2Ni4 chemical compositions of smelting It is by mass percentage：C=0.17~0.23%, Si=0.15 ~ 0.40%, Mn=0.30 ~ 0.60%, P≤0.020%, S≤0.015%, Ni=3.25 ~ 3.75%, Cr=1.25% ~ 1.75%, Cu≤0.25%, Al=0.010 ~ 0.030%, surplus is Fe and other are inevitable Impurity.
- 3. the production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets according to claim 1, it is characterised in that：Even The big bag of casting process uses long nozzle and long nozzle blowing argon to tundish, and argon flow amount is 80~120l/min；Tundish is adopted With stopper Argon, argon flow amount is 2~6l/min.
- 4. the production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets according to claim 1, it is characterised in that：Even During casting, tundish adds alkaline covering agent and carbonization rice husk to reduce the thermal radiation loss of molten steel and protect molten steel not by two Secondary oxidation, the main component of alkaline covering agent used is CaO：50~60%, Al2O3：25~35%, MgO：2~4%, SiO2≤ 4.0%、Fe2O3＜ 1.5% and H2O≤0.5%。
- 5. the production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets according to claim 1, it is characterised in that：Adopt The mode that covering slag is added with submersed nozzle and into crystallizer is protected to crystallizer molten steel, and submersed nozzle used is Integral water gap.
- 6. the production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets according to claim 1, it is characterised in that：Institute It is 0.92~0.99 with the basicity of crystallizer protecting residue, fusion temperature is 1140~1170 DEG C, and viscosity is 12.34 pools.
- 7. the production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets according to claim 1, it is characterised in that：Knot Brilliant device electromagnetic agitation uses external agitator, and stirring frequency is 1~2Hz, and stir current is 200~600A.
- 8. the production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets according to claim 1, it is characterised in that：Casting Stream electromagnetic agitation uses external agitator, and stirring frequency is 5~12Hz, and stir current is 60~300A.
- 9. the production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets according to claim 1, it is characterised in that：Draw Base speed is 0.1~0.5m/min, is determined according to different section, and Blank drawing machine is clamped using 3 rollers, wherein 1 is fixing roller, 2 Individual is adjustable roller；Different section refers to the diameter of continuous cast round billets, minimum φ 400mm, maximum φ 800mm；Cross section diameter is φ During 400mm, when casting speed 0.5m/min, cross section diameter are φ 800mm, casting speed 0.1m/min.
- 10. the production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets according to claim 1, it is characterised in that：Institute The diameter of round billet is stated between 400~800mm of φ, the round billet produces on vertical casting machine.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108660359A (en) * | 2018-05-02 | 2018-10-16 | 河南中原特钢装备制造有限公司 | The continuous cast round billets production method of inexpensive ultra supercritical high-pressure boiler tube |
| CN108672666A (en) * | 2018-05-24 | 2018-10-19 | 江苏省沙钢钢铁研究院有限公司 | Continuous Casting Method for Improving Center Segregation of Round Billet Spring Steel 60Si2CrVAT |
| CN108817332A (en) * | 2018-06-26 | 2018-11-16 | 辽宁科技大学 | High-alloy steel vertical continuous casting base Solidification Quality control method in a kind of big specification |
| CN108856670A (en) * | 2018-08-08 | 2018-11-23 | 石钢京诚装备技术有限公司 | The production method of low segregation 42CrMo4 series continuous cast round billets |
| CN109940141A (en) * | 2019-04-25 | 2019-06-28 | 芜湖新兴铸管有限责任公司 | Square blank crystallizer on-line tuning technique |
| CN114850426A (en) * | 2022-05-31 | 2022-08-05 | 本钢板材股份有限公司 | Method for improving compactness of steel core of continuous casting bearing |
| WO2023165068A1 (en) * | 2022-03-02 | 2023-09-07 | 江阴兴澄特种钢铁有限公司 | Carburized bearing steel for large-load rolling mill bearing and production method therefor |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1861830A (en) * | 2006-06-22 | 2006-11-15 | 钢铁研究总院 | Steel for heavy loading gear |
| CN102653843A (en) * | 2012-05-24 | 2012-09-05 | 宝山钢铁股份有限公司 | Carburizing bearing steel |
| JP2013147689A (en) * | 2012-01-18 | 2013-08-01 | Nippon Steel & Sumitomo Metal Corp | Carburized bearing steel material |
| JP2014005520A (en) * | 2012-06-27 | 2014-01-16 | Nippon Steel & Sumitomo Metal | Method of manufacturing carburizing bearing steel material |
| CN104259415A (en) * | 2014-10-23 | 2015-01-07 | 山东钢铁股份有限公司 | Continuous casting method of continuous-cast round billets |
| CN104532102A (en) * | 2014-12-09 | 2015-04-22 | 抚顺特殊钢股份有限公司 | Novel manufacturing technology of large-sized carburized bearing steel G20Cr2Ni4A for wind electricity |
| CN105648355A (en) * | 2014-11-14 | 2016-06-08 | 璧典凯 | Novel bearing steel |
| CN106312000A (en) * | 2016-10-12 | 2017-01-11 | 中原特钢股份有限公司 | 18CrNiMo7-6 round billet continuous casting method for vertical type continuous casting production gear steel |
| CN106521324A (en) * | 2016-12-08 | 2017-03-22 | 山东钢铁股份有限公司 | Steel for wind power intermediate shaft gear carburization and preparation method thereof |
-
2017
- 2017-06-16 CN CN201710454320.8A patent/CN107350445B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1861830A (en) * | 2006-06-22 | 2006-11-15 | 钢铁研究总院 | Steel for heavy loading gear |
| JP2013147689A (en) * | 2012-01-18 | 2013-08-01 | Nippon Steel & Sumitomo Metal Corp | Carburized bearing steel material |
| CN102653843A (en) * | 2012-05-24 | 2012-09-05 | 宝山钢铁股份有限公司 | Carburizing bearing steel |
| JP2014005520A (en) * | 2012-06-27 | 2014-01-16 | Nippon Steel & Sumitomo Metal | Method of manufacturing carburizing bearing steel material |
| CN104259415A (en) * | 2014-10-23 | 2015-01-07 | 山东钢铁股份有限公司 | Continuous casting method of continuous-cast round billets |
| CN105648355A (en) * | 2014-11-14 | 2016-06-08 | 璧典凯 | Novel bearing steel |
| CN104532102A (en) * | 2014-12-09 | 2015-04-22 | 抚顺特殊钢股份有限公司 | Novel manufacturing technology of large-sized carburized bearing steel G20Cr2Ni4A for wind electricity |
| CN106312000A (en) * | 2016-10-12 | 2017-01-11 | 中原特钢股份有限公司 | 18CrNiMo7-6 round billet continuous casting method for vertical type continuous casting production gear steel |
| CN106521324A (en) * | 2016-12-08 | 2017-03-22 | 山东钢铁股份有限公司 | Steel for wind power intermediate shaft gear carburization and preparation method thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108660359A (en) * | 2018-05-02 | 2018-10-16 | 河南中原特钢装备制造有限公司 | The continuous cast round billets production method of inexpensive ultra supercritical high-pressure boiler tube |
| CN108672666A (en) * | 2018-05-24 | 2018-10-19 | 江苏省沙钢钢铁研究院有限公司 | Continuous Casting Method for Improving Center Segregation of Round Billet Spring Steel 60Si2CrVAT |
| CN108817332A (en) * | 2018-06-26 | 2018-11-16 | 辽宁科技大学 | High-alloy steel vertical continuous casting base Solidification Quality control method in a kind of big specification |
| CN108817332B (en) * | 2018-06-26 | 2020-04-21 | 辽宁科技大学 | Method for controlling solidification quality of large-specification medium-high alloy steel vertical continuous casting billet |
| CN108856670A (en) * | 2018-08-08 | 2018-11-23 | 石钢京诚装备技术有限公司 | The production method of low segregation 42CrMo4 series continuous cast round billets |
| CN109940141A (en) * | 2019-04-25 | 2019-06-28 | 芜湖新兴铸管有限责任公司 | Square blank crystallizer on-line tuning technique |
| WO2023165068A1 (en) * | 2022-03-02 | 2023-09-07 | 江阴兴澄特种钢铁有限公司 | Carburized bearing steel for large-load rolling mill bearing and production method therefor |
| CN114850426A (en) * | 2022-05-31 | 2022-08-05 | 本钢板材股份有限公司 | Method for improving compactness of steel core of continuous casting bearing |
| CN114850426B (en) * | 2022-05-31 | 2023-11-17 | 本钢板材股份有限公司 | Method for improving compactness of steel core part of continuous casting bearing |
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