CN105710347A - Anti-oxidation protection flux for composite roll and preparation method of flux - Google Patents
Anti-oxidation protection flux for composite roll and preparation method of flux Download PDFInfo
- Publication number
- CN105710347A CN105710347A CN201610291381.2A CN201610291381A CN105710347A CN 105710347 A CN105710347 A CN 105710347A CN 201610291381 A CN201610291381 A CN 201610291381A CN 105710347 A CN105710347 A CN 105710347A
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- CN
- China
- Prior art keywords
- flux
- protection against
- against oxidation
- cao
- composite roll
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- 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.)
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Classifications
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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
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Glass Compositions (AREA)
Abstract
The embodiment of the invention discloses an anti-oxidation protection flux for a composite roll. The flux comprises 20%-36% of SiO2, 0-5% of Al2O3, 10%-25% of CaO, 0-5% of MgO, 15%-35% of Na2O and 10%-25% of B2O3. Research proves that by increasing the content of CaO in the flux, the basicity of the anti-oxidation protection flux can be enhanced, thereby facilitating absorption of oxides generated by transition metal elements during a centrifugal casting process; and the content of B2O3 in the flux is increased, and thus the vitrification capability of the anti-oxidation protection flux with the high content of CaO is improved. Therefore, during centrifugal casting of the composite roll, air can be isolated for preventing oxidation, and the oxides generated by the transition metal elements during the centrifugal casting process can be absorbed. An excellent metallurgical binding layer can be formed between a working layer and a core of the composite roll, and thus the working layer of the composite roll is less prone to peeling during steel rolling.
Description
Technical field
The present invention relates to roll and manufacture field, particularly to a kind of composite roll with protection against oxidation flux and
Preparation method.
Background technology
Composite roll is widely used on all kinds of milling train, such as precision rolling working roll, the strip of rolling mill for hot rolled planks and strips
In the backing roll of milling train, molded line pipe-mill, precision rolling working roll etc..The composite roll body of roll is by outer layer (also
It is exactly working lining) and core (including roll neck part) composition, two parts typically use unlike material to make.
Composite roll can use centrifugal casting method to manufacture, and during manufacture, first in centrifuge, cast is compound rolls
Roller working lining molten steel, then core iron water is filled out in cast.Roll manufacturing firm is in order to ensure that composite roll works now
Directly form good metallurgical bonding layer between layer and core, generally after pouring working lining molten steel, need
Being sprinkled into protection against oxidation flux, the most commercially available O type glass dregs, after glass dregs high temperature melting in molten steel
Surface spreading becomes certain thickness glass-film, and isolation air is anti-oxidation.But, composite roll of today works
Layer material in typically can mix substantial amounts of transition metal, such as Cr, V, Mn, W, Nb etc., from
During heart cast, these transition metals easily aoxidize, and generate oxide.And above-mentioned glass
It is anti-oxidation that slag is merely able to completely cut off air, and can not absorb above-mentioned transition metal during centrifugal casting
Generated oxide.So make generated oxide can be clipped between composite roller operational layer and core,
Can not form good metallurgical bonding layer, during steel rolling, composite roller operational layer easily peels off.
Summary of the invention
The embodiment of the invention discloses a kind of composite roll protection against oxidation flux and preparation method thereof, be used for
Solve existing glass dregs can not be formed as between composite roller operational layer during protection against oxidation flux and core
Good metallurgical bonding layer, during steel rolling, composite roller operational layer holds flaky problem.Technical scheme is as follows:
First, the invention provides a kind of composite roll protection against oxidation flux, based on described anti-oxidation guarantor
Protect flux, its chemical composition comprised count by weight percentage, including:
The SiO of 20-36%2, the Al of 0-5%2O3, the Na of the MgO of the CaO of 10-25%, 0-5%, 15-35%2O,
And the B of 10-25%2O3。
In the preferred embodiment of the present invention, CaO and SiO2Weight ratio is 0.5≤CaO/SiO2≤0.75。
In the preferred embodiment of the present invention, protection against oxidation flux includes: CaO and SiO2Percentage
Content and be 45%≤CaO+SiO2≤ 55%.
In the preferred embodiment of the present invention, protection against oxidation flux includes: the B of 15-22%2O3。
In the preferred embodiment of the present invention, the particle diameter of described protection against oxidation flux is 6 mesh-40 mesh.
Present invention also offers above-mentioned protection against oxidation flux preparation method, including:
According to the percentage by weight of the chemical composition that described protection against oxidation flux comprises, calculate and prepare this oxygen
The weight of each raw material required for change protecting flux；
Weigh each raw material, grind, mix after obtain batch；
Described batch is heated to fusing, prepares vitreous humour；
Described vitreous humour is carried out shrend, obtains glass frit, crushing and screening after drying, i.e. obtain described
Composite roll protection against oxidation flux.
In the preferred embodiment of the present invention,
Weigh each raw material, be ground to particle diameter respectively and mix less than after 40 mesh, obtain batch.
In the preferred embodiment of the present invention,
By described batch with the heating rate of 10-15 DEG C/min to 1280-1350 DEG C, and it is incubated
0.5-3 hour so that it is clarification homogenizing, prepare vitreous humour.
In the preferred embodiment of the present invention, described vitreous humour is carried out shrend, obtains glass frit,
It is ground to particle diameter after drying and is less than 6 mesh-40 mesh, i.e. obtain described composite roll protection against oxidation flux.
Found that by research a kind of composite roll protection against oxidation flux that the present invention provides improves CaO
Content, on the one hand can increase the basicity of protection against oxidation flux, beneficially transition metal centrifugal
The absorption of the oxide generated in casting process；On the other hand can reduce protecting flux high temperature viscosity, have
It is beneficial to flux sprawl rapidly, covers molten steel, play the effect of isolation air.Meanwhile, improve B2O3Contain
Amount, on the one hand increases the vitrification ability of high CaO content protection against oxidation flux；On the other hand can strengthen
Dissolve the ability of transition metal oxide.Therefore, during composite roll centrifugal casting, use the present invention
Composite roll protection against oxidation flux, air can not only be completely cut off anti-oxidation, moreover it is possible to absorptive transition metal
Element oxide generated in centrifugal casting process.Ensureing can shape between composite roller operational layer and core
Becoming good metallurgical bonding layer, during steel rolling, composite roller operational layer is unlikely to be peel off.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is embodiment 1 and the fusion temperature of comparative example and the result design sketch of flowing temperature test.
Detailed description of the invention
The composite roll protection against oxidation flux that the present invention provides, based on described protection against oxidation flux total
Weight, its chemical composition comprised count by weight percentage, including:
The SiO of 20-36%2, the SiO of preferably 25-32%2, the Al of 0-5%2O3, the CaO of 10-25%, excellent
Elect the CaO of 15-22% as, the Na of the MgO of 0-5%, 15-35%2O, and the B of 10-25%2O3It is preferably
The B of 15-22%2O3.Wherein, 0.5≤CaO/SiO2(weight ratio)≤0.75,45%≤CaO+SiO2(percentage
Content)≤55%.Composite roll protection against oxidation flux provided by the present invention, its outward appearance is glassy.
CaO and SiO2Total content is more than 55%, protection against oxidation flux melts temperature drift；CaO and SiO2
Total content is less than 45%, and protection against oxidation flux melts temperature is on the low side.Owing to CaO high temperature has strong helping
Molten effect, and low temperature increases fusion temperature, so in formula designs, if CaO/SiO2＞ 0.75, protection
Flux fusing point is high, and cold melt speed is slow, and high temperature viscosity is little, easily trickles at working lining inner surface, it is impossible to
Well cover working lining.CaO/SiO2＜ 0.5, protecting flux basicity is little, it is impossible to absorb field trash；High temperature
Viscosity is bigger than normal, it is impossible to well cover working lining.Preferably, the particle diameter of above-mentioned protection against oxidation flux is 6
Mesh-40 mesh, its outward appearance is glass scoriform.
In a kind of detailed description of the invention of the present invention, gross weight based on described protection against oxidation flux, its
The chemical composition comprised count by weight percentage, including the SiO of 27-36%2, the Al of 2.5-5%2O3,
The Na of the MgO of the CaO of 17-21%, 3.5-5%, 20-26%2O, and the B of 11-18%2O3, wherein,
0.5≤CaO/SiO2(weight ratio)≤0.75,45%≤CaO+SiO2(percentage composition)≤55%.
Above-mentioned composite roll protection against oxidation flux can be prepared by the following method:
According to the percentage by weight of the chemical composition that described protection against oxidation flux comprises, calculate and prepare this oxygen
The weight of each raw material required for change protecting flux；
Weigh each raw material, grind, be preferably ground to particle diameter and be less than 40 mesh, after mixing, obtain batch；
Described batch is heated to fusing, prepares vitreous humour；Preferably, by described batch with
The heating rate of 10-15 DEG C/min is to 1280-1350 DEG C, and is incubated 0.5 hour-3 hours so that it is clear
Clear homogenizing, prepares vitreous humour.It should be noted that described particle diameter less than 40 mesh it should be understood that particle diameter
40 eye mesh screens can be passed through.
Described vitreous humour is carried out shrend, obtains glass frit, grind after drying, be preferably ground to particle diameter
6 mesh-40 mesh, i.e. obtain described composite roll protection against oxidation flux.
It should be noted that the above-mentioned description to protection against oxidation flux preparation method, if any not discharging part,
It is referred to the conventional method in glass preparation field, required setting during preparation protection against oxidation flux
Standby, it would however also be possible to employ the conventional equipment in glass preparation field, the present invention does not repeats at this.
Needing further exist for explanation, the chemical composition included in composite roll protection against oxidation flux can
Introducing with the raw material conventional by glass preparation field, the present invention is former to corresponding to each chemical composition at this
Material is not defined, for example, it is possible to include but not limited to quartz sand, borax pentahydrate or borax decahydrate or anhydrous
Borax, limestone, soda, Anhydrite etc. can introduce the various raw mineral materials of above-mentioned oxide composition.
Being described technical scheme below in conjunction with specific embodiment, described embodiment is only
It is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, this
The every other embodiment that field those of ordinary skill is obtained under not making creative work premise, all
Belong to the scope of protection of the invention.
It should be noted that in each of the embodiments described below, specified otherwise, mentioned percent is not had to be
Percetage by weight.
The chemical composition content of each composite roll protection against oxidation flux in table 1 embodiment 1-6
In table 1, term " other " is appreciated that as by introduced other impurities composition of raw material, this kind of one-tenth
The concrete chemical composition present invention divided, without being defined, generally, does not interferes with the technology of the present invention yet
The realization of scheme.
Embodiment 1
According to the chemical composition content in embodiment 1 in table 1, anti-oxidation guarantor used by preparation 100kg composite roll
Protect flux.
Being computed, the proportioning of each raw material is as shown in table 2 below.
Required each proportioning raw materials in table 2 embodiment 1
Weigh each raw material shown in table 2, grind respectively and cross 40 mesh sieves, being then mixed to get batch；Will
Described batch to 1350 DEG C, and is incubated 1 hour with 12 DEG C/min of heating rate so that it is clarification is all
Change, prepare vitreous humour.Described vitreous humour is carried out shrend, obtains glass frit, after drying, be ground to grain
Footpath 40 mesh, i.e. obtains described composite roll protection against oxidation flux.
Embodiment 2
According to the chemical composition content in embodiment 2 in table 1, anti-oxidation guarantor used by preparation 100kg composite roll
Protect flux.
Being computed, the proportioning of each raw material is as shown in table 3 below.
Required each proportioning raw materials in table 3 embodiment 2
Embodiment 3
According to the chemical composition content in embodiment 3 in table 1, anti-oxidation guarantor used by preparation 100kg composite roll
Protect flux.
Being computed, the proportioning of each raw material is as shown in table 4 below.
Required each proportioning raw materials in table 4 embodiment 3
Embodiment 4
According to the chemical composition content in embodiment 4 in table 1, anti-oxidation guarantor used by preparation 100kg composite roll
Protect flux.
Being computed, the proportioning of each raw material is as shown in table 5 below.
Required each proportioning raw materials in table 5 embodiment 4
Embodiment 5
According to the chemical composition content in embodiment 5 in table 1, anti-oxidation guarantor used by preparation 100kg composite roll
Protect flux.
Being computed, the proportioning of each raw material is as shown in table 6 below.
Required each proportioning raw materials in table 6 embodiment 5
Embodiment 6
According to the chemical composition content in embodiment 6 in table 1, anti-oxidation guarantor used by preparation 100kg composite roll
Protect flux.
Being computed, the proportioning of each raw material is as shown in table 7 below.
Required each proportioning raw materials in table 7 embodiment 6
Test and result
1, fusion temperature and flowing temperature measure
Protection against oxidation flux prepared by embodiment 1-6 and commercially available O type glass dregs protection against oxidation flux
It is measured；Result is as shown in table 8；Wherein,
Method of testing: protecting flux is ground to form fine powder, makes diameter in sample preparation device and height is respectively 3mm
Cylindrical sample.It is placed in tube furnace heating, along with temperature raises, when cylinder height drops to original height
Degree 1/2 time, be defined as hemisphere point temperature or fusion temperature；When cylinder height drops to the 1/5 of original height
Time, it is defined as flowing temperature.
Fusion temperature is high, and protecting flux can not melt rapidly, easily causes slag inclusion.Flowing temperature is higher, protects
Protecting flux can not be poor at molten steel surface spreading, covering performance.With commercially available O type glass dregs, (chemical composition contains
Amount: the SiO of 46%2, the Al of 4%2O3, the CaO of 4%, the Na of 33%2O, and the B of 9%2O3, its
It, surplus.) it is comparative example, the protection against oxidation flux melts temperature of the present invention and O type glass in embodiment
Slag is close, and flowing temperature is significantly lower than O type glass dregs.It is particularly suitable for the centrifugal casting of medium-and-large-sized high-speed steel roll
Make.During medium-and-large-sized high-speed steel roll centrifugal casting, the area that protecting flux needs flowing to cover is big, O
Type glass flowing temperature is high, poor mobile performance, it is not easy to be completely covered.The protection against oxidation flux of the present invention
Flowing temperature is low, good fluidity, can cover molten steel, forms glass-film, plays the effect of isolation air.
Fig. 1 is the test result design sketch of the embodiment of the present invention 1 and comparative example；Wherein 1 is the embodiment of the present invention 1,
2 is comparative example；As it is shown in figure 1, at 900 DEG C, product of the present invention shakeouts area and shakeouts area greatly compared with comparative example,
The good fluidity of product of the present invention is described.
It addition, the present invention provide protecting flux, compared with existing O type glass dregs, add CaO and
B2O3Content, the content improving CaO can increase the basicity of protection against oxidation flux, beneficially transition gold
Belong to the absorption of element oxide generated in centrifugal casting process, improve B simultaneously2O3Content, permissible
The vitrification ability of protection against oxidation flux when increasing high CaO content.
Table 8 fusion temperature and flowing temperature measurement result
2, the composite roll that the flux of the present invention manufactures is used, according to " GB/T 1503-2008 cast steel roll ",
" GB/T 1504-2008 grain roll " etc. require composite roll binder course is carried out ultrasonic examination, in conjunction with
Layer position there are no single or intensive equivalent defect, meets national Specification.
Above a kind of composite roll protection against oxidation flux provided by the present invention and preparation method thereof is carried out
It is discussed in detail.Principle and the embodiment of the present invention are set forth by specific embodiment used herein,
The explanation of above example is only intended to help to understand method and the central idea thereof of the present invention.It should be pointed out that,
For the person of ordinary skill of the art, under the premise without departing from the principles of the invention, it is also possible to this
Invention carries out some improvement and modification, and these improve and modify the protection also falling into the claims in the present invention.
Claims (9)
1. a composite roll protection against oxidation flux, it is characterised in that melt based on described protection against oxidation
Agent, its chemical composition comprised count by weight percentage, including:
The SiO of 20-36%2, the Al of 0-5%2O3, the Na of the MgO of the CaO of 10-25%, 0-5%, 15-35%2O,
And the B of 10-25%2O3。
2. protection against oxidation flux as claimed in claim 1, it is characterised in that CaO and SiO2Weight ratio is
0.5≤CaO/SiO2≤0.75。
3. protection against oxidation flux as claimed in claim 1, it is characterised in that CaO and SiO2Percentage contain
Amount and be 45%≤CaO+SiO2≤ 55%.
4. the protection against oxidation flux as described in any one in claim 1-3, it is characterised in that including:
The B of 15-22%2O3。
5. protection against oxidation flux as claimed in claim 1, it is characterised in that described protection against oxidation melts
The particle diameter of agent is 6 mesh-40 mesh.
6. the protection against oxidation flux preparation method as described in claim 1-5, it is characterised in that including:
According to the percentage by weight of the chemical composition that described protection against oxidation flux comprises, calculate and prepare this oxygen
The weight of each raw material required for change protecting flux；
Weigh each raw material, grind, mix after obtain batch；
Described batch is heated to fusing, prepares vitreous humour；
Described vitreous humour is carried out shrend, obtains glass frit, crushing and screening after drying, i.e. obtain described
Composite roll protection against oxidation flux.
7. method as claimed in claim 6, it is characterised in that
Weigh each raw material, be ground to particle diameter respectively and mix less than after 40 mesh, obtain batch.
8. method as claimed in claim 6, it is characterised in that
By described batch with the heating rate of 10-15 DEG C/min to 1280-1350 DEG C, and it is incubated
0.5-3 hour so that it is clarification homogenizing, prepare vitreous humour.
9. method as claimed in claim 6, it is characterised in that
Described vitreous humour being carried out shrend, obtains glass frit, being crushed to particle diameter after drying is 6 mesh-40 mesh,
I.e. obtain described composite roll protection against oxidation flux.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610291381.2A CN105710347A (en) | 2016-05-05 | 2016-05-05 | Anti-oxidation protection flux for composite roll and preparation method of flux |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610291381.2A CN105710347A (en) | 2016-05-05 | 2016-05-05 | Anti-oxidation protection flux for composite roll and preparation method of flux |
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| CN105710347A true CN105710347A (en) | 2016-06-29 |
Family
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Family Applications (1)
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| CN201610291381.2A Pending CN105710347A (en) | 2016-05-05 | 2016-05-05 | Anti-oxidation protection flux for composite roll and preparation method of flux |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106398331A (en) * | 2016-08-31 | 2017-02-15 | 中钢集团邢台机械轧辊有限公司 | Centrifugal compound high-speed steel roller end surface thermal treatment coating, and preparation method and application method thereof |
| CN109622907A (en) * | 2019-02-27 | 2019-04-16 | 新乡市海山机械有限公司 | A kind of anti-oxidation additive of volatilization prevention for chromium-bronze centrifugal casting |
| CN110421149A (en) * | 2019-08-22 | 2019-11-08 | 东营市泰达石油装备有限责任公司 | Double metallic composite material and its preparation method and application, abrasion-proof accessories, winning equipment |
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| CN101472693A (en) * | 2006-06-22 | 2009-07-01 | Posco公司 | Mold flux and continuous casting method using the same |
| WO2011090218A1 (en) * | 2010-01-21 | 2011-07-28 | 新日本製鐵株式会社 | Mould powder for continuous casting of steel |
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| CN101058684A (en) * | 2006-04-21 | 2007-10-24 | 中国科学院过程工程研究所 | High temperature common mild steel anti-oxidation coating and application thereof |
| CN101472693A (en) * | 2006-06-22 | 2009-07-01 | Posco公司 | Mold flux and continuous casting method using the same |
| CN101250462A (en) * | 2008-03-28 | 2008-08-27 | 西北有色金属研究院 | Rare metal high-heat anti-oxidation lubricating paint and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106398331A (en) * | 2016-08-31 | 2017-02-15 | 中钢集团邢台机械轧辊有限公司 | Centrifugal compound high-speed steel roller end surface thermal treatment coating, and preparation method and application method thereof |
| CN106398331B (en) * | 2016-08-31 | 2019-12-03 | 中钢集团邢台机械轧辊有限公司 | A kind of centrifugal compound high-speed steel roll end face is heat-treated coating and preparation method thereof and application method |
| CN109622907A (en) * | 2019-02-27 | 2019-04-16 | 新乡市海山机械有限公司 | A kind of anti-oxidation additive of volatilization prevention for chromium-bronze centrifugal casting |
| CN110421149A (en) * | 2019-08-22 | 2019-11-08 | 东营市泰达石油装备有限责任公司 | Double metallic composite material and its preparation method and application, abrasion-proof accessories, winning equipment |
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