CN102965519A - Carburizing bearing steel electroslag remelting casting powder - Google Patents
Carburizing bearing steel electroslag remelting casting powder Download PDFInfo
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- CN102965519A CN102965519A CN2012104777621A CN201210477762A CN102965519A CN 102965519 A CN102965519 A CN 102965519A CN 2012104777621 A CN2012104777621 A CN 2012104777621A CN 201210477762 A CN201210477762 A CN 201210477762A CN 102965519 A CN102965519 A CN 102965519A
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- bearing steel
- slag
- carburizing bearing
- esr
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Abstract
The invention discloses carburizing bearing steel remelting casting powder. The carburizing bearing steel remelting casting powder is prepared from the following materials in parts by weight: 28-30 parts of fluorite, 43.5-45.5 parts of alumina powder, 21.5-23.5 parts of lime, 2.5-4.5 parts of fused magnesite and 0.3-0.7 parts of quartz. In comparison with the conventional vacuum arc remelting casting powder, the carburizing bearing steel remelting casting powder is simple in electroslag remelting equipment, low in production cost, convenient to operate, smooth and clean in ingoting surface, excellent in thermoplasticity and high in yield.
Description
Technical field
The invention belongs to the metallurgic auxiliary materials technical field, be specifically related to a kind of carburizing bearing steel esr covering slag.
Background technology
Along with the fast development of social sophisticated technology, new function material and new structural material are had higher requirement, and electroslag remelting technique has also obtained developing by leaps and bounds and using.The electroslag metallurgy technology is the compounding technology of a kind of metal or alloy Refining and solidification Control, its product has emerging, the characteristics such as process is controlled at high purity, uniform ingredients, mechanical property and use properties good, near end, therefore at many key areas for the production of high-end product or key position.Esr aspect purity not second to vacuum arc remelting, desulfuration, removal non-metallic inclusion are all above vacuum arc remelting, only go N, H, O not as good as vacuum arc remelting, and be better than vacuum arc remelting aspect the ingot casting crystallization, the compactness of ingot structure, Chemical Composition homogeneity have also surpassed vacuum arc remelting, do not have macro defect, yield rate is high.Therefore electroslag remelting technique has obtained comprehensively fast development, and high-quality steel and the superalloy of its production are widely used.
Summary of the invention
The objective of the invention is to propose a kind of stable nothing cutout of the starting the arc in esr process, lubricate good carburizing bearing steel esr covering slag.
Purpose of the present invention is achieved through the following technical solutions:
A kind of carburizing bearing steel esr covering slag is made by the raw material of following weight parts: 28～30 parts in fluorite, 43.5～45.5 parts of aluminum oxide powders, 21.5～23.5 parts of limes, 2.5～4.5 parts of electrosmelted magnesite clinkers, 0.3～0.7 part in quartz.
Described carburizing bearing steel esr covering slag comprises following composition: SiO
21.0～2.0 parts, 17.5～22.5 parts of CaO, Al
2O
340.0～46.0 parts, 4.0～6.0 parts of MgO, CaF
226.0～32.0 parts, S＜0.04 part, C＜0.06 part.
Described carburizing bearing steel esr covering slag adopts every kind of raw material of following quality control standard: a. to dry in advance 4～6 hours, guarantees water content≤0.05%; B. after the abundant melting of electric furnace, stirred 5～10 minutes; C. adopt the water-cooled quick forming method.
The use of carburizing bearing steel esr covering slag of the present invention was compared with former vacuum arc remelting covering slag, and esr equipment is simple, productive expense is low, easy to operate, ingot casting any surface finish, thermoplasticity is good, lumber recovery is high.The esr bearing steel is in order to guarantee that bearing under high speed, high-load condition, can have good fatigue resistance energy and wear resisting property.After the abundant melting of electric furnace, stirred 5～10 minutes, full and uniform to guarantee physicochemical property; Adopt the water-cooled quick forming method, with the density that guarantees slag and prevent from making moist.The purity of steel and the homogeneity of tissue and direct relation the fatigue resistance of bearing and wear resistance.The gathering of nonmetallic inclusionsin steel is the root that causes fatigure failure, and the brittle inclusion such as aluminum oxide, titanium nitride particularly is so Control Shaft corbel feed collet foreign material are the important keys that guarantee bearing quality.Therefore should determine, join selecting with characteristics of residue material material from chemical composition design, the physicals of remelting covering slag analyzes.
The boiling point of described esr covering slag is higher than the temperature of electroslag slag bath, guarantees that Electroslag Process is stable, reduces the volatilization loss of slag; The fusing point of slag is lower than the seasoning metal fusing point, guarantees the ingot casting forming effect; Described slag composition is near low melting eutectics point, and the liquation phenomenon when the minimizing slag crust solidifies prevents that the slag composition from changing and slag crust is blocked up; Have higher resistivity, can produce enough heats, guarantee the carrying out of melting of metal, overheated and refining, to improve the esr electrical efficiency, reduce and compare power consumption; Have good flowability, to guarantee slag bath thermal convection under the high temperature, make radially stable and uniform of ingot casting or foundry goods, the physical reactions such as the desulfurization that guarantees to degas carry out; Do not contain unstable oxide FeO, MnO etc. and the oxide M e that appraises at the current rate
xO
y, prevented metal oxygenation, melting loss of elements; Slag has higher alkalisation, has effectively guaranteed the carrying out of reflow process sweetening process; At high temperature slag has good moistening, absorption and dissolving power to non-metallic inclusion; Solid slag has certain moisture resistance, is difficult for occuring hydration; Described slag and seasoning metal linear expansivity are poor larger, have guaranteed that slag crust is easy to remove.
The selection of electroslag remelting slag, proportioning and the quantity of slag has great impact to metallurgical quality, smelting technique economic target and the environment protection of Electro Slag Remelting Steel.In order to satisfy the requirement of every technico-economical comparison, must to consider from every physicochemical property such as fusing point, specific conductivity, viscosity, basicity, surface tension, specific heat capacity, vapour pressure, Gas permeabilities, just can select rational slag type.In conjunction with the physicochemical property stability and production practical situation of esr covering slag finished product, carburizing bearing steel esr covering slag of the present invention is mainly with CaF
2, CaO, Al
2O
3, MgO is main.Be described as follows: 1) CaF
2Can reduce fusing point, viscosity and the surface tension of slag; But it is higher to compare specific conductivity, pure CaF
2Reach 4.54s/cm 1650 o'clock specific conductivity, but CaF
2When content is high, easily emit obnoxious flavour and flue dust in the melting, contaminate environment, therefore CaF of the present invention
2Weight part is 26.0～32.0 parts; 2). CaO can increase the basicity of slag, improves desulfuration efficiency, and can reduce the specific conductivity of slag, but the CaO water-absorbent is strong, easily brings hydrogen and oxygen into, causes steel oxygenation, increase hydrogen so CaO weight part of the present invention is 17.5～22.5 parts; 3). Al
2O
3Can obviously reduce the specific conductivity of slag, reduce power consumption, boost productivity, but Al in the slag
2O
3Increase, will make temperature of fusion and the viscosity of slag raise, and will reduce the sweetening effectiveness of slag, can make in addition reflow process be difficult to set up and stable, so Al of the present invention
2O
3Weight part is 40.0～46.0 parts; 4). MgO can form one deck on the slag bath surface and partly solidify film, can prevent the slag bath oxygen uptake and the oxide compound that prevents from appraising at the current rate in the slag transmits oxygen supply to metal pool, thereby oxygen in the ingot casting, hydrogen, nitrogen content are reduced, but MgO makes the viscosity of slag improve easily, and therefore MgO weight part of the present invention is 4.0～6.0 parts; 5). SiO
2Can reduce the fusing point of slag, improve the high-temp plastic of slag, be the ingot casting any surface finish, also can reduce the specific conductivity of slag, can also change the form of steel grade inclusion, is that steel are easy to machining deformation.But SiO in the slag
2Content is too much, causes CaF in the slagging
2Volatilization loss, and make SiO in the metal
2Content increases, therefore SiO of the present invention
2Weight part is 1.0～2.0 parts.The foreign matter content of esr covering slag of the present invention is low, and purity is high, dry exclusion.
Embodiment
Embodiment one
A kind of carburizing bearing steel esr covering slag is made by the raw material of following weight parts: 28～30 parts in fluorite, 43.5 parts of aluminum oxide powders, 21.5 parts of limes, 2.5 parts of electrosmelted magnesite clinkers, 0.3 part in quartz.
Described carburizing bearing steel esr covering slag comprises following composition: SiO
21.0 part, 17.5 parts of CaO, Al
2O
340.0 part, 4.0 parts of MgO, CaF
226.0 part, 0.01 part of S, 0.02 part of C.
Described carburizing bearing steel esr covering slag adopts every kind of raw material of following quality control standard: a. to dry in advance 4～6 hours, guarantees water content≤0.05%; B. after the abundant melting of electric furnace, stirred 5～10 minutes; C. adopt the water-cooled quick forming method.
Embodiment two
A kind of carburizing bearing steel esr covering slag is made by the raw material of following weight parts: 28.5 parts in fluorite, 44 parts of aluminum oxide powders, 22 parts of limes, 3 parts of electrosmelted magnesite clinkers, 0.4 part in quartz.
Described carburizing bearing steel esr covering slag comprises following composition: SiO
21.25 part,, 19 parts of CaO, Al
2O
341.5 part, 4.5 parts of MgO, CaF
227.5 part, 0.015 part of S, 0.03 part of C.
Described carburizing bearing steel esr covering slag adopts every kind of raw material of following quality control standard: a. to dry in advance 4～6 hours, guarantees water content≤0.05%; B. after the abundant melting of electric furnace, stirred 5～10 minutes; C. adopt the water-cooled quick forming method.
Embodiment three
A kind of carburizing bearing steel esr covering slag is made by the raw material of following weight parts: 29 parts in fluorite, 44.5 parts of aluminum oxide powders, 22.5 parts of limes, 3.5 parts of electrosmelted magnesite clinkers, 0.5 part in quartz.
Described carburizing bearing steel esr covering slag comprises following composition: SiO
21.5 part,, 20 parts of CaO, Al
2O
343 parts, 5 parts of MgO, CaF
229 parts, 0.02 part of S, 0.04 part of C.
Described carburizing bearing steel esr covering slag adopts every kind of raw material of following quality control standard: a. to dry in advance 4～6 hours, guarantees water content≤0.05%; B. after the abundant melting of electric furnace, stirred 5～10 minutes; C. adopt the water-cooled quick forming method.
Embodiment four
A kind of carburizing bearing steel esr covering slag is made by the raw material of following weight parts: 29.5 parts in fluorite, 45 parts of aluminum oxide powders, 23 parts of limes, 4 parts of electrosmelted magnesite clinkers, 0.6 part in quartz.
Described carburizing bearing steel esr covering slag comprises following composition: SiO
21.75 part, 21 parts of CaO, Al
2O
344.5 part, 5.5 parts of MgO, CaF
229.5 part, 0.025 part of S, 0.05 part of C.
Described carburizing bearing steel esr covering slag adopts every kind of raw material of following quality control standard: a. to dry in advance 4～6 hours, guarantees water content≤0.05%; B. after the abundant melting of electric furnace, stirred 5～10 minutes; C. adopt the water-cooled quick forming method.
Embodiment five
A kind of carburizing bearing steel esr covering slag is made by the raw material of following weight parts: 28～30 parts in fluorite, 45.5 parts of aluminum oxide powders, 23.5 parts of limes, 4.5 parts of electrosmelted magnesite clinkers, 0.7 part in quartz.
Described carburizing bearing steel esr covering slag comprises following composition: SiO
22.0 part, 22.5 parts of CaO, Al
2O
346.0 part, 6.0 parts of MgO, CaF
232.0 part, 0.029 part of S, 0.059 part of C.
Described carburizing bearing steel esr covering slag adopts every kind of raw material of following quality control standard: a. to dry in advance 4～6 hours, guarantees water content≤0.05%; B. after the abundant melting of electric furnace, stirred 5～10 minutes; C. adopt the water-cooled quick forming method.
Described carburizing bearing steel esr covering slag adopts every kind of raw material of following quality control standard: a. to dry in advance 4～6 hours, guarantees water content≤0.05%; B. after the abundant melting of electric furnace, stirred 5～10 minutes; C. adopt the water-cooled quick forming method.
The use of carburizing bearing steel esr covering slag of the present invention was compared with former vacuum arc remelting covering slag, and esr equipment is simple, productive expense is low, easy to operate, ingot casting any surface finish, thermoplasticity is good, lumber recovery is high.
Claims (3)
1. carburizing bearing steel esr covering slag, it is characterized in that: the raw material by following weight parts is made: 28～30 parts in fluorite, 43.5～45.5 parts of aluminum oxide powders, 21.5～23.5 parts of limes, 2.5～4.5 parts of electrosmelted magnesite clinkers, quartzy 0.3～0.7 part.
2. carburizing bearing steel esr covering slag as claimed in claim 1 is characterized in that: comprise following composition: SiO
21.0～2.0 parts, 17.5～22.5 parts of CaO, Al
2O
340.0～46.0 parts, 4.0～6.0 parts of MgO, CaF
226.0～32.0 parts, S＜0.04 part, C＜0.06 part.
3. the preparation technology of carburizing bearing steel esr covering slag as claimed in claim 1, it is characterized in that: every kind of raw material of a. was dried 4～6 hours in advance, guaranteed water content≤0.05%; B. after the abundant melting of electric furnace, stirred 5～10 minutes; C. adopt the water-cooled quick forming method.
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|---|---|---|---|
| CN2012104777621A CN102965519A (en) | 2012-11-22 | 2012-11-22 | Carburizing bearing steel electroslag remelting casting powder |
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|---|---|---|---|
| CN2012104777621A CN102965519A (en) | 2012-11-22 | 2012-11-22 | Carburizing bearing steel electroslag remelting casting powder |
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| CN102965519A true CN102965519A (en) | 2013-03-13 |
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ID=47795955
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5633164A (en) * | 1979-08-22 | 1981-04-03 | Mitsubishi Steel Mfg Co Ltd | Manufacture of steel ingot by remelting |
| CN1078500A (en) * | 1992-05-15 | 1993-11-17 | 上海重型机器厂 | A kind of electroslag technology that prevents to increase hydrogen |
| JPH0673464A (en) * | 1991-02-27 | 1994-03-15 | Japan Casting & Forging Corp | Production of high purity stainless steel |
| CN1127175A (en) * | 1995-01-17 | 1996-07-24 | 东北大学 | Pouring protective slag for electric slag centrifugal casting |
| CN101654743A (en) * | 2009-09-18 | 2010-02-24 | 沈阳东大兴科冶金技术有限公司 | Device and method for directionally solidifying steel ingot with oversized cross section by electric slag furnace |
| CN101654742A (en) * | 2008-08-22 | 2010-02-24 | 宝山钢铁股份有限公司 | Electroslag remelting slag system with low hydrogen permeability, preparation method and using method thereof |
| CN101775500A (en) * | 2010-01-21 | 2010-07-14 | 河南省西保冶材集团有限公司 | Premelted refining protective material for electroslag furnace |
| CN101890492A (en) * | 2010-07-08 | 2010-11-24 | 沈阳东大材料先进制备技术工程研究中心 | Slag for liquid pouring of electroslag |
| CN102776379A (en) * | 2011-05-13 | 2012-11-14 | 宝山钢铁股份有限公司 | Electroslag remelting slag system and its application |
-
2012
- 2012-11-22 CN CN2012104777621A patent/CN102965519A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5633164A (en) * | 1979-08-22 | 1981-04-03 | Mitsubishi Steel Mfg Co Ltd | Manufacture of steel ingot by remelting |
| JPH0673464A (en) * | 1991-02-27 | 1994-03-15 | Japan Casting & Forging Corp | Production of high purity stainless steel |
| CN1078500A (en) * | 1992-05-15 | 1993-11-17 | 上海重型机器厂 | A kind of electroslag technology that prevents to increase hydrogen |
| CN1127175A (en) * | 1995-01-17 | 1996-07-24 | 东北大学 | Pouring protective slag for electric slag centrifugal casting |
| CN101654742A (en) * | 2008-08-22 | 2010-02-24 | 宝山钢铁股份有限公司 | Electroslag remelting slag system with low hydrogen permeability, preparation method and using method thereof |
| CN101654743A (en) * | 2009-09-18 | 2010-02-24 | 沈阳东大兴科冶金技术有限公司 | Device and method for directionally solidifying steel ingot with oversized cross section by electric slag furnace |
| CN101775500A (en) * | 2010-01-21 | 2010-07-14 | 河南省西保冶材集团有限公司 | Premelted refining protective material for electroslag furnace |
| CN101890492A (en) * | 2010-07-08 | 2010-11-24 | 沈阳东大材料先进制备技术工程研究中心 | Slag for liquid pouring of electroslag |
| CN102776379A (en) * | 2011-05-13 | 2012-11-14 | 宝山钢铁股份有限公司 | Electroslag remelting slag system and its application |
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Application publication date: 20130313 |