CN107435096B - Composite carbon covers roller and preparation method thereof - Google Patents
Composite carbon covers roller and preparation method thereof Download PDFInfo
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- CN107435096B CN107435096B CN201610352109.0A CN201610352109A CN107435096B CN 107435096 B CN107435096 B CN 107435096B CN 201610352109 A CN201610352109 A CN 201610352109A CN 107435096 B CN107435096 B CN 107435096B
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- roll
- ceramic preform
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/562—Details
- C21D9/563—Rolls; Drums; Roll arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Ceramic Products (AREA)
Abstract
The present invention provides a kind of composite carbon set rollers and preparation method thereof, composite carbon set roller includes the left shaft head, right axle head, the body of roll, ceramic preform, carbon set and several block reinforcement items, the body of roll is nested in the outside of ceramic preform, the left shaft head and right axle head are fixedly arranged on the two sides of ceramic preform by the cladding of the body of roll respectively, the carbon set is nested in the outside of the body of roll, and several block reinforcement items are embedded at the both ends of ceramic preform respectively in a manner of dividing equally.This method comprises the following steps: production has the ceramic preform of keyway, and a block reinforcement item will respectively be arranged in each of ceramic preform keyway；Ceramic preform with block reinforcement item is horizontally inserted into the cavity of the body of roll, the inner wall of the block reinforcement item and the body of roll is welded；Carbon set is socketed on to the outside of the body of roll.Carbon of the invention covers the roller body of roll, improves carbon set roller body of roll resistance sexuality at high temperature, extend the carbon set roller body of roll in machine service life.
Description
Technical field
The present invention relates to a kind of composite carbon set rollers and preparation method thereof, belong to mechanical equipment technical field.
Background technique
Strip needs annealed furnace treatment to manage in process of production, is that transfer plate band needs in furnace, is mounted with to count in annealing furnace
Numerous carbon set rollers is measured, strip is in contact with carbon set can prevent metalling roll surface buildup, guarantee strip product quality.The prior art
Carbon set roller formed as shown in Figure 1, covering 3 two parts by the metal body of roll and the carbon of graphite, the metal body of roll is by the body of roll 2 and two sides
The left shaft head 1 and right axle head 4 form, and the left shaft head 1 and right axle head 4 are welded as one with the body of roll 2 using the interference fit loading body of roll 2
Body is hollow inside the body of roll 2.According to belt steel product process requirement, some product requirement annealing temperatures are at 1100 DEG C or so.Carbon set
During roller use, the body of roll gradually bends along axial direction, detects to the lower machine bending body of roll, and maximum position is deformed under cold conditions and is reached
To 10mm or more, lead to carbon set scratch strip surface, is forced blowing out replacement carbon set roller, influences unit production capacity.
By analysis, under high temperature environment, carbon set roller metal rolling body material performance sharply decline, although use performance compared with
Good metal material, but elevated temperature strength is only several MPa, and under the action of body of roll self weight and centrifugal force, easily bend change
Shape.
In order to extend the service life of carbon set roller, researched and proposed and a kind of special high temperature height is perfused in body of roll internal cavities
The composite construction scheme of the ceramic castable (hereinafter referred to as: ceramic castable) of intensity microdilatancy.As shown in Fig. 2, being in the body of roll 2
Cavity structure filled with ceramic castable 7 in the cavity in the body of roll 2, and is in contact in the body of roll 2 with the left shaft head 1 and right axle head 4
Two ends respectively add three block reinforcement items 6, the center of the left shaft head 1 and right axle head 4 is equipped with gas vent 5.Such design is
Intensity based on ceramic castable at high temperature has the characteristics that much higher than Strength of Metallic Materials, and then composite construction carbon covers roller roller
Body has given full play to the high feature of ceramic castable high temperature strength, and the intensity of the final acquisition metal body of roll and ceramic castable is folded
Add effect, the two is common under the high temperature conditions resists bending deformation, as shown in Figure 3.
But since thermal expansion metal coefficient is 10 times of ceramic material, nothing between metal and ceramic castable under room temperature
Gap, during high-temperature baking, expansion of metal most probably causes ceramic castable to crack and be broken, the quality of pour mass
Be difficult to it is controlled, cause the filling type ceramics castable composite roll service life improve it is limited.
Summary of the invention
The present invention is based on developing on the basis of composite structural design thought, a kind of stable and reliable quality is ceramic, metal is multiple
The carbon for closing structure covers the roller body of roll.
Composite construction carbon set roller core technology be using ceramic material elevated temperature strength be better than metal material characteristic come
Body of roll bending is resisted, on condition that the defects of must assure that the ceramic material flawless inside the body of roll, and filling type ceramics castable
The quality of composite roll is difficult to controlled.It has herein proposed and has been inserted into a kind of pottery for reaching ceramic material hot properties in body of roll internal cavities
The composite construction scheme of porcelain prefabricated component, ceramic preform are made of the scheme of die casting, after demoulding, are then convenient to
Detect ceramic preform casting quality, can ensure that insertion body of roll cavity in ceramic preform flawless the defects of.
The present invention is achieved by the following technical solutions:
A kind of composite carbon set roller comprising the left shaft head, right axle head, the body of roll, ceramic preform, carbon set and several block reinforcement items,
The body of roll is nested in the outside of ceramic preform, the left shaft head and right axle head and is fixedly arranged on ceramics respectively by the cladding of the body of roll
The two sides of prefabricated component, the carbon set are nested in the outside of the body of roll, and several block reinforcement items are embedded at pottery in a manner of dividing equally respectively
The several block reinforcement items of uniform welding, the distance of adjacent two block reinforcement items are distinguished in the both ends of porcelain prefabricated component, the i.e. inner wall at body of roll both ends
It is equal.
Preferably, the quantity of the block reinforcement item is six.
Basic principle of the invention are as follows: the current carbon set roller body of roll is designed as cavity structure, is up to ceramic material high temperature
The ceramic preform of characteristic is inserted into body of roll internal cavities.The intensity of ceramic preform at high temperature, which has, is much higher than metal material
The characteristics of intensity, the composite construction carbon set roller body of roll designed on this basis have given full play to strong under ceramic preform high temperature
Spend high feature.The intensity of the metal body of roll and ceramic preform is superimposed in this way, and the common resistance bending of the two under the high temperature conditions becomes
Shape.
A kind of production method of composite carbon set roller as the aforementioned comprising following steps:
Production has the ceramic preform of keyway；
One block reinforcement item is respectively set in each keyway of ceramic preform；
Ceramic preform with block reinforcement item is horizontally inserted into the cavity of the body of roll, it will be in the block reinforcement item and the body of roll
Wall is welded；
Carbon set is socketed on to the outside of the body of roll.
Such as: respectively there are three the ceramic preforms of keyway at production both ends, before ceramic preform is inserted into the body of roll, each
A block reinforcement item is installed by bolt and round nut in keyway position, and the ceramic preform level with block reinforcement item is threaded through the body of roll
It is interior, finally block reinforcement item is welded and fixed with the body of roll.
It preferably, is in clearance fit between the ceramic preform and the body of roll.
Preferably, the gap between the ceramic preform and the body of roll is 1~2mm.
Preferably, the dimensional accuracy of the internal diameter of the body of roll is no more than 0.05mm.
Preferably, the dimensional accuracy of the outer diameter of the ceramic preform is no more than 0.5mm, and straightness is no more than
0.65mm。
Preferably, the production method of the ceramic preform includes the following steps:
One papery sleeve is placed vertically, as papery sleeve die, and it is each in the both ends inner wall of papery sleeve die
Punch-pin of three block reinforcement items as the keyway of ceramic preform is set；
Ceramic castable is poured into the paper sleeve mold；
After cooling and shaping, demoulding obtains the ceramic preform with keyway.
That is: just keyway is produced on ceramic preform when making ceramic preform, when finally demoulding, directly by papery
Sleeve die is burnt.
Preferably, the production method of the papery sleeve includes the following steps:
A piece cylindrical bar is placed vertically, is wound in the outside of the bar with paper, obtains papery sleeve, and
After the production of papery sleeve, papery sleeve is kept to place vertically.
Preferably, the internal diameter precision of the papery sleeve is no more than 0.2mm.
Compared with prior art, the present invention have it is following the utility model has the advantages that
The composite construction carbon set roller body of roll of the invention forms the carbon set roller body of roll of a kind of " metal-ceramic composite construction ",
Since the flexural strength (15~25Mp) at a high temperature of ceramic castable is much higher than the elevated temperature strength of metal material, to be metal
The body of roll is played a supporting role, and carbon set roller body of roll resistance sexuality at high temperature is improved, extend the carbon set roller body of roll in machine
Service life.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is the structural schematic diagram that original carbon covers roller；
Fig. 2 is the structural schematic diagram that improved carbon covers roller；
Fig. 3 is metal material and ceramic material intensity curve composite diagram；
Fig. 4 is the structural schematic diagram that composite carbon of the invention covers roller；
Fig. 5 is the casting condition schematic diagram that composite carbon of the invention covers roller；
Fig. 6 is to be inserted into ceramic preform Construction State schematic diagram in the present invention inside the body of roll；
In figure: 1, the left shaft head；2, the body of roll；3, carbon set；4, right axle head；5, gas vent；6 block reinforcement items；7, ceramic castable；8,
Ceramic preform；9, metab；10, papery sleeve die；11, bolt；12, round nut.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
On the one hand, a kind of structure of composite carbon set roller provided by the invention is as shown in Figure 4 comprising the left shaft head 1, right axle head
4, the body of roll 2, ceramic preform 8, carbon set 3 and six block reinforcement items 6, the body of roll 2 are nested in the outside of ceramic preform 8,1 He of the left shaft head
Right axle head 4 is fixedly arranged on the two sides of ceramic preform 8 by the cladding of the body of roll 2 respectively, and carbon covers 3 outsides for being nested in the body of roll 2, and three
Block reinforcement item 6 is embedded at one end of ceramic preform 8, and remaining three block reinforcement items 6 are embedded at the other end of ceramic preform 8.Ceramics
The block reinforcement item 6 at 8 both ends of prefabricated component is uniformly distributed on the circumference of ceramic preform 8.
On the other hand, the present invention also provides a kind of composite carbon as the aforementioned set roller production method comprising following step
Suddenly, as illustrated in Figures 5 and 6:
A piece cylindrical bar is placed vertically, is wound in the outside of the bar with paper, obtains papery sleeve, and
After the production of papery sleeve, papery sleeve is kept to place vertically, as papery sleeve die 10, papery sleeve die 10
Internal diameter precision is no more than 0.2mm；
One papery sleeve die 10 is vertically placed on to the surface of metab 9, and in papery sleeve die 10
Punch-pin of three block reinforcement items as the keyway of ceramic preform is respectively arranged in wall both ends；
The cast ceramics castable 7 into papery sleeve die 10 obtains both ends all after ceramic 7 cooling and shaping of castable
Ceramic preform 8 with keyway, the dimensional accuracy for controlling the outer diameter of ceramic preform 8 are no more than 0.5mm, and straightness is no more than
0.65mm.A block reinforcement item 6 is installed additional by bolt 11 and round nut 12 in each keyway, finally in demoulding by papery sleeve
Mold 10 is burnt.It is of course also possible to which block reinforcement item is fixedly connected with ceramic preform after demoulding.
The ceramic preform 8 for being provided with block reinforcement item 6 is horizontally inserted into the cavity of the body of roll 2, the ruler of the internal diameter of the body of roll 2 is controlled
It is in clearance fit between 0.05mm and ceramic preform 8 and the body of roll 2 that very little precision, which is no more than, and gap is 1~2mm.
Block reinforcement item 6 and the inner wall of the body of roll 2 are welded；
Carbon set 3 is socketed on to the outside of the body of roll 2.
The key technology point that the above method needs to pay attention to is as follows:
1, the mold design of ceramic, metal composite structure carbon set roller implementation and casting
Composite construction carbon set roller core technology be using ceramic material elevated temperature strength be better than metal material characteristic come
Body of roll bending is resisted, on condition that the defects of must assure that the ceramic material flawless inside the body of roll, and filling type ceramics castable
The quality of composite roll is difficult to controlled.It has herein proposed and has been inserted into a kind of pottery for reaching ceramic material hot properties in body of roll internal cavities
The composite construction scheme of porcelain prefabricated component, i.e., ceramic, metal composite structure carbon set roller implementation is changed by " filling type " " to be inserted
Enter formula ", ceramic preform is made of the scheme of die casting, after demoulding, is then convenient to detection ceramic preform
Casting quality, can ensure that insertion body of roll cavity in ceramic preform flawless the defects of.Realize that such scheme, key are
It designs and manufactures and meet dimension precision requirement and easily demoulding mold.Originally using metal tube manufacture mold, for convenient for demoulding,
The two halves of mold then must be combined by an entirety using bolt by the machined metal die wire cutting of inner hole into two
Mold, due to there is assembled error, the casting charge bar for being poured out was directly affected and is poured there are inconsistent phenomenon (reaching 3mm or more)
The dimensional accuracy of material feeding stick, it is difficult to meet dimension precision requirement.It is subsequent to be investigated by multiple, it is final to determine to select paper sleeve conduct
Mold, paper sleeve molding mode: paper is Wrapping formed around high-precision roller, and paper sleeve hole size precision is by metallic roll outer diameter
Accuracy guarantee, hole size precision can control within 0.2mm, and manufacturing the paper sleeve finished should suspend vertically immediately, avoid
It is bent, while paper sleeve should also suspend vertically in casting process, if paper sleeve is horizontal positioned, by its effect of weight
Paper sleeve will appear bending, is bent in casting process and more aggravates, and casting charge bar is caused to be bent.
2, the dimensional tolerance compounding technique of metal body of roll inner hole and ceramic preform
In order to guarantee that ceramic preform is smoothly inserted into metal body of roll internal cavities, metal body of roll inner hole and pottery are avoided again
The gap of porcelain prefabricated component is excessive.If gap is excessive, the effect of the casting charge bar support metal body of roll can be deteriorated, or even to no effect,
The metal body of roll still can be obviously bent；Gap is too small, and casting charge bar presence can not be inserted into the risk of the metal body of roll and not be available.Therefore
Determine that the dimensional tolerance of metal body of roll inner hole and ceramic preform cooperates based on following 3 factors: 1), metal and ceramic material it is high
The difference of warm swell increment；2), the degree of controllability of metal body of roll inner hole and ceramic preform machining accuracy；3), to gold when equipment operation
Belong to the controlling value of body of roll deflection.
It is clearance fit by the matching design of ceramic preform and metal body of roll inner hole, gap control is in 1~2mm under room temperature
Within, while the gap situation of change being accounted under 1100 DEG C of high temperature, since thermal expansion metal coefficient is ceramic material
10 times, ignore the thermal expansion of ceramic preform herein, the thermal expansion coefficient of metal material is 17.6 × 10-6(1/ DEG C), room temperature
It 25 DEG C, 1075 DEG C of maximum temperature rise, is computed, metal body of roll inner hole size increase at 1100 DEG C is less than 2mm, hot total backlash
Within 3~4mm, according to actual use experience, the controlling value of metal body of roll bending deformation quantity is less than 10mm, is able to satisfy life completely
Production demand.
The dimensional accuracy of metal body of roll inner hole can control within ± 0.05mm, the dimensional accuracy of ceramic preform mainly by
Paper sleeve precision and machining accuracy are determined, by using high-precision paper sleeve and to the ceramic preform after baking demoulding
Surface machining is processed using the method for special diamond tool and the fixed body of roll of special bikini, can will be ceramic
The excircle dimension precision controlling of prefabricated component is within ± 0.5mm, and straightness is within 0.65mm.
It summarizes: by the dimension control to metal body of roll inner hole and ceramic preform, can guarantee that the two is matched under room temperature
Gap control is closed within 1~2mm, actual gap is 1~1.2mm.
3, technique for fixing of the ceramic preform inside the metal body of roll
When the metal body of roll operates in order to prevent, the ceramic preform and the metal body of roll of metal body of roll inner cavity are relatively rotated and are damaged
Bad, ceramic preform need to be fixed on metallic roll and rotate together.When manufacturing ceramic preform, at the both ends of ceramic preform
Locate each reserved three keyways, ceramic preform be inserted into behind metallic roll, is put into block reinforcement item at the keyway position of ceramic preform,
And block reinforcement item and metal body of roll inner wall are welded.
In conclusion only presently preferred embodiments of the present invention, is not used to limit the scope of implementation of the present invention, it is all according to
Equivalent changes and modifications carried out by shape described in scope of the invention as claimed, construction, feature and spirit should be included in this
In the scope of the claims of invention.
Claims (6)
1. a kind of composite carbon covers roller, which is characterized in that including the left shaft head, right axle head, the body of roll, reach ceramic material hot properties
Ceramic preform, carbon set and several block reinforcement items, the body of roll are nested in the outside of ceramic preform, the left shaft head and right axle head
It is fixedly arranged on the two sides of ceramic preform respectively by the cladding of the body of roll, the carbon set is nested in the outside of the body of roll, several gears
Rib is embedded at the both ends of ceramic preform respectively in a manner of dividing equally, in which:
The dimensional accuracy of the outer diameter of the ceramic preform is no more than 0.5mm, and straightness is no more than 0.65mm；
The dimensional accuracy of the internal diameter of the body of roll is no more than 0.05mm；
It is in clearance fit between the ceramic preform and the body of roll, gap between the ceramic preform and the body of roll is 1~
2mm。
2. composite carbon as described in claim 1 covers roller, which is characterized in that the quantity of the block reinforcement item is six.
3. a kind of production method of composite carbon set roller as claimed in claim 1 or 2, which comprises the steps of:
Production has the ceramic preform for reaching ceramic material hot properties of keyway, and will be described in each of ceramic preform
One block reinforcement item is respectively set in keyway；
Ceramic preform with block reinforcement item is horizontally inserted into the cavity of the body of roll, the inner wall of the block reinforcement item and the body of roll is carried out
Welding；
Carbon set is socketed on to the outside of the body of roll.
4. the production method of composite carbon set roller as claimed in claim 3, which is characterized in that the production side of the ceramic preform
Method includes the following steps:
One papery sleeve is placed vertically, as papery sleeve die；
Ceramic castable is poured into the papery sleeve die；
After cooling and shaping, the ceramic preform is obtained.
5. the production method of composite carbon set roller as claimed in claim 4, which is characterized in that the production method of the papery sleeve
Include the following steps:
A piece cylindrical bar is placed vertically, is wound in the outside of the bar with paper, obtains papery sleeve, and in paper
After matter sleeve makes, papery sleeve is kept to place vertically.
6. the production method of composite carbon set roller as claimed in claim 4, which is characterized in that the internal diameter of the papery sleeve
Precision is no more than 0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610352109.0A CN107435096B (en) | 2016-05-25 | 2016-05-25 | Composite carbon covers roller and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610352109.0A CN107435096B (en) | 2016-05-25 | 2016-05-25 | Composite carbon covers roller and preparation method thereof |
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| Publication Number | Publication Date |
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| CN107435096A CN107435096A (en) | 2017-12-05 |
| CN107435096B true CN107435096B (en) | 2019-06-25 |
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ID=60453360
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| CN201610352109.0A Active CN107435096B (en) | 2016-05-25 | 2016-05-25 | Composite carbon covers roller and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818242A (en) * | 2010-04-06 | 2010-09-01 | 中冶南方(武汉)威仕工业炉有限公司 | High-temperature furnace roller adopting air cooling technology |
| CN202430266U (en) * | 2011-12-19 | 2012-09-12 | 宝山钢铁股份有限公司 | Heat-insulation gas-cooled carbon sleeve roll |
| CN202482364U (en) * | 2012-01-09 | 2012-10-10 | 宝山钢铁股份有限公司 | Anti-deformation carbon sleeve roller under high temperature |
| CN104404238A (en) * | 2014-11-19 | 2015-03-11 | 中冶南方(武汉)威仕工业炉有限公司 | Ceramic roller device for silicon steel horizontal type continuous annealing furnace |
| CN105126959A (en) * | 2015-08-28 | 2015-12-09 | 南通高欣耐磨科技股份有限公司 | Manufacturing method of detachable ceramic alloy composite grinding roller |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2821857B1 (en) * | 2001-03-06 | 2004-07-30 | Usinor | ROLL FOR TRANSPORTING A METAL STRIP IN A CONTINUOUS NOISE PLANT |
-
2016
- 2016-05-25 CN CN201610352109.0A patent/CN107435096B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818242A (en) * | 2010-04-06 | 2010-09-01 | 中冶南方(武汉)威仕工业炉有限公司 | High-temperature furnace roller adopting air cooling technology |
| CN202430266U (en) * | 2011-12-19 | 2012-09-12 | 宝山钢铁股份有限公司 | Heat-insulation gas-cooled carbon sleeve roll |
| CN202482364U (en) * | 2012-01-09 | 2012-10-10 | 宝山钢铁股份有限公司 | Anti-deformation carbon sleeve roller under high temperature |
| CN104404238A (en) * | 2014-11-19 | 2015-03-11 | 中冶南方(武汉)威仕工业炉有限公司 | Ceramic roller device for silicon steel horizontal type continuous annealing furnace |
| CN105126959A (en) * | 2015-08-28 | 2015-12-09 | 南通高欣耐磨科技股份有限公司 | Manufacturing method of detachable ceramic alloy composite grinding roller |
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| CN107435096A (en) | 2017-12-05 |
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