CN208787207U - Composite roll set and roll - Google Patents
Composite roll set and roll Download PDFInfo
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- CN208787207U CN208787207U CN201821453588.6U CN201821453588U CN208787207U CN 208787207 U CN208787207 U CN 208787207U CN 201821453588 U CN201821453588 U CN 201821453588U CN 208787207 U CN208787207 U CN 208787207U
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- internal layer
- transition zone
- working lining
- composite roll
- seamless pipe
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Abstract
The utility model discloses a kind of composite roll sets, it include: outer working lining, compound transition zone and internal layer seamless pipe, the internal layer seamless pipe is prefabricated low-carbon seamless steel pipe, the outer working lining is cast-in-place antifriction alloy steel layer, the compound transition zone is that thermite and slag former react with cast-in-place aluminium alloy and generate the transition zone that molten iron and internal layer seamless pipe surface layer fusing molten iron are collectively formed, it is metallurgical bonding between the outer working lining, the compound transition zone and the internal layer seamless pipe three, the axial length of composite roll set is 0.1m~100m.And disclose a kind of roll including composite roll set.It is coated on the seamless tube outer surface of internal layer by using the mixed coating of thermite and slag former, mixed coating is during the cast-in-place casting of outer working lining, it encounters the aluminium alloy of high temperature and chemically reacts, generate molten iron, the heat released simultaneously can melt the surface layer of seamless steel pipe, compound transition zone is collectively formed in the molten iron of generation and the molten iron of seamless steel pipe surface layer fusing, can be realized outer working lining in this way and internal layer seamless pipe is firmly combined.
Description
Technical field
The utility model relates to technique for casting roller field, in particular to a kind of composite roll set, and including the composite roll
The roll of set.
Background technique
Roll is most important expendable part in Rolling production, and, also referred to as " mothers of steel ", China produces 80 every year for it
Ten thousand tons or so of roll.Roll used at present is mostly traditional solid roll, and roll sleeve type composite roll is at present only in stick line
Material rolling field is applied.Roll sleeve type composite roll is made of roll shaft and roller set, and roller set is nested in the outside of roll shaft, and by roller
Axis drive is contacted with steel billet, is plastically deformed steel billet.Roller set needs to bear when in use biggish roll-force, simultaneously surface layer
There are biggish sliding frictions between steel billet；Roller set and roll shaft elastic conjunction, internal layer need to transmit the larger torsion of roll shaft offer
Square, therefore the characteristics of composite roll set needs to have " interior tough and outer hard ".
In existing roll alloy, high-wearing feature, high intensity and high tenacity etc. can be had both simultaneously without single material
Complete characteristic needed for roller set.Therefore together by the Material cladding of two kinds of different performances, maximum by double-metal composite technique
The characteristic of two kinds of metals of utilization of limit prepares the main method that high performance bimetallic composite roll set is current roller set preparation.
But since there are biggish difference, seamless pipe tables for the physical and chemical performance of composite roll two composite layer materials of set
Layer is unavoidably there are oxide layer, when being produced using conventional cast combination process, the junction of two composite layers easily occur stomata,
The defects of slag inclusion, loose and layering, reduce the intensity and composite effect of composite layer, make composite roll cover bear it is high-intensitive and
When prolonged rolling work, easily occur to loosen, crack or chip off-falling, or even fracture.
Therefore develop new combination process, prepare it is compound closely, the high high-performance composite roll set of bond strength is to roll sleeve type
The popularization and application of composite roll are of great significance.
Utility model content
The technical problem to be solved by the present invention is to provide the manufacturers that a kind of composite roll set and a kind of composite roll cover
Method and the roll covered with the composite roll, the internal layer seamless pipe and outer layer that the manufacturing method of composite roll set covers composite roll are resistance to
The generation for the defects of merging the complete metallurgical bonding of layer gold, while junction stomata, slag inclusion can be reduced, to improve composite roll
The globality and working performance and service life of set, and improve the working performance of roll.To solve the above-mentioned problems, this reality
With a kind of composite roll set of novel offer, its technical solution is as follows:
A kind of composite roll set of the utility model, the composite roll set include: outer working lining, compound transition zone and internal layer without
Slit-tube, the internal layer seamless pipe are prefabricated low-carbon seamless steel pipe, and the outer working lining is cast-in-place antifriction alloy steel layer, described
Compound transition zone is that thermite and slag former react with cast-in-place aluminium alloy and generate molten iron and internal layer seamless pipe surface layer is melted
Change the transition zone that molten iron is collectively formed, is between the outer working lining, the compound transition zone and the internal layer seamless pipe three
The axial length of metallurgical bonding, the composite roll set is 0.1m~100m.
The composite roll set of the utility model, compared with composite roll set in the prior art, using thermite and slag former
Mixed coating is coated in the periphery of internal layer seamless pipe, and mixed coating encounters the conjunction of high temperature during the cast-in-place casting of outer working lining
Golden liquid and chemically react, generate the molten iron of liquid, while the heat released can melt the surface layer of seamless steel pipe, thus,
Mixed coating, that is, thermite and slag former react the molten iron generated with aluminium alloy and the molten iron of seamless steel pipe surface layer fusing is common
Compound transition zone is formd, can be realized outer working lining and the firm metallurgical bonding of internal layer seamless pipe in this way.
As the improvement of the above-mentioned composite roll set of the utility model, the outer working lining is described multiple with a thickness of 20mm~80mm
Conjunction transition region thickness is 0.1mm~5.0mm, and the internal layer seamless pipe is with a thickness of 10mm~50mm.In this way, compound transition zone design
At reasonable thickness, thermite and slag former can either be melted during outer working lining is cast-in-place, while keeping internal layer seamless
Pipe surface part fusing, to achieve the purpose that three's depth metallurgical bonding；If the mixed coating of thermite and slag former is set
It sets too thick, is then easy to generate more dross when casting, influences metallurgical bonding quality；If the mixing of thermite and slag former applies
Layer setting is too thin, then the purpose of internal layer seamless pipe surface part thawing is not achieved.
Further, the ratio between the outer working lining, the compound transition zone, thickness of the internal layer seamless pipe three are 30
~50:1:20~30.
The utility model also provides a kind of manufacturing method of composite roll set, the manufacturing method the following steps are included:
Step 1 prepares the internal layer seamless pipe that the low-carbon seamless steel pipe of predetermined size is covered as composite roll, removes in described
The dirty and oxide layer for pipe surface that layer is seamless.
Thermite and slag former are mixed to form clay shape for step 2, and it is seamless to be uniformly coated on the internal layer
On tube outer surface, the coating layer thickness of thermite and slag former is 0.5mm-5.0mm.
Step 3 will apply and be covered with the internal layer seamless pipe of thermite and slag former and be installed in casting die, it is described in
Temperature when layer seamless pipe is installed in the casting die is controlled at 0 DEG C~500 DEG C.
Melted aluminium alloy is poured into the casting die by step 4 from casting gate, temperature when aluminium alloy is cast
Degree control is at 1300 DEG C~1500 DEG C, and thermite and slag former encounter the reaction of high temperature alloy liquid and generate molten iron, iron generated
The compound transition zone is collectively formed in the molten iron that water and the seamless pipe surface of the internal layer are met high temperature alloy liquid and melted, and casting is completed
Natural cooling obtains the composite roll set afterwards.
The manufacturing method of the composite roll set of the utility model, compared with the manufacturing method of composite roll in the prior art set,
Outer working lining is manufactured by the way of cast-in-place, so that the compound transition zone foreign work layer and internal layer that are formed in casting process
The infiltration of seamless pipe more plus depth, i.e. metallurgical bonding are more preferable；So that the combination of outer working lining and internal layer seamless pipe more steps up
It is close.It is assembled again with existing by outer working lining, compound transition zone and internal layer seamless pipe are prefabricated, then by high-temperature process
Manufacturing method is compared, and the composite roll set service life of the utility model manufacture improves 2-3 times, substantially will not in use
Loosening between layers occurs.
As the improvement of the above-mentioned manufacturing method of the utility model, in step 1, the seamless tube outer surface of internal layer it is coarse
Degree control is in Ra0.2~Ra6.0.In this way, first, so that the thermite and slag former of clay shape are coated to internal layer seamless pipe appearance
Adhesiveness is more preferable when face, avoids the problem of thermite and slag former are accumulated down in high temperature alloy liquid casting process；Second,
The external surface area of internal layer seamless pipe is increased, when high temperature alloy liquid is poured into casting die, on internal layer is seamless tube outer surface
Part outstanding, i.e. roughness can melt rapidly, improve associativity, the globality of internal layer seamless pipe and outer working lining.
Further, in step 2, the thermite and slag former include Al powder, Fe2O3Powder, FeO powder, CaCO3Powder,
SiO2Powder, wherein Al powder, Fe2O3Powder, FeO powder, CaCO3Powder, SiO2The weight ratio of powder be 1:2~4:0.2~1.0:0.5~
2.0:0.5~1.5.In this way, high temperature can be such that thermite and slag former occurs after high temperature alloy liquid is poured into casting die
Thermit reaction: 2Al+Fe2O3→2Fe+Al2O3+ 836kJ, reaction generates liquid Fe water, while the heat released can be by internal layer
The surface layer of seamless pipe is melted, and is collectively formed so that molten iron generated is combined with the molten iron that internal layer seamless pipe surface layer is melted
Compound transition zone can preferably realize internal layer seamless pipe and pour into the metallurgical bonding of aluminium alloy.
Further, in step 2, Al powder, the Fe of the specific ingredient of the thermite and slag former2O3Powder, FeO powder,
CaCO3Powder, SiO2The partial size of powder is 0.01mm~0.5mm.
The utility model also provides a kind of roll, including such as above-mentioned composite roll set.
The beneficial effect of composite roll set provided by the utility model is:
The periphery of internal layer seamless pipe is coated in by using the mixed coating of thermite and slag former, mixed coating is in outer work
It during making the cast-in-place casting of layer, encounters the aluminium alloy of high temperature and chemically reacts, generate the molten iron of liquid, while the heat released
Amount can melt the surface layer of seamless steel pipe, thus, mixed coating, that is, thermite and slag former react the molten iron generated with aluminium alloy
And the molten iron of seamless steel pipe surface layer fusing together forms compound transition zone, and it is seamless with internal layer to can be realized outer working lining in this way
Manage firm metallurgical bonding.
The manufacturing method of composite roll set manufactures outer working lining by using cast-in-place mode, so that the shape in casting process
At compound transition zone foreign work layer and internal layer seamless pipe infiltration more plus depth, i.e. metallurgical bonding is more preferable；So that outer
The combination of working lining and internal layer seamless pipe is even closer.With it is existing that outer working lining, compound transition zone and internal layer seamless pipe is equal
Prefabricated to assemble again, then the manufacturing method Jing Guo high-temperature process is compared, and the composite roll of the utility model manufacture covers service life
2-3 times is improved, loosening between layers will not occur substantially in use.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the vertical section structure schematic diagram of the utility model first embodiment composite roll set；
Fig. 2 is the structural schematic diagram of the manufacturing method processing composite roll set of the utility model second embodiment composite roll set.
It is marked in figure as follows:
The outer working lining of 1-；The compound transition zone of 2-；3- internal layer seamless pipe；4- casting die；5- casting gate.
Specific embodiment
In order to make those skilled in the art more fully understand the technical scheme in the embodiment of the utility model, and make this reality
Can be more obvious and easy to understand with novel above objects, features, and advantages, with reference to the accompanying drawing to the specific reality of the utility model
The mode of applying is further described.
It should be noted that being used to help understand the utility model for the explanation of these embodiments, but not
Constitute the restriction to the utility model.In addition, technology involved in the various embodiments of the present invention described below
Feature can be combined with each other as long as they do not conflict with each other.
Embodiment one
Referring to FIG. 1, a kind of composite roll set of the present embodiment, which includes: outer working lining 1, compound transition zone 2
With internal layer seamless pipe 3, internal layer seamless pipe 3 is prefabricated low-carbon seamless steel pipe, and outer working lining 1 is cast-in-place antifriction alloy steel layer,
Compound transition zone 2 is that thermite and slag former react with cast-in-place aluminium alloy and generate molten iron and the fusing of 3 surface layer of internal layer seamless pipe
The transition zone that molten iron is collectively formed is metallurgical bonding between 3 three of outer working lining 1, compound transition zone 2 and internal layer seamless pipe, multiple
The axial length for closing roller set is 0.1m~100m.
Preferred embodiment, outer working lining 1 with a thickness of 20mm~80mm, compound transition zone 2 with a thickness of 0.1mm~
5.0mm, internal layer seamless pipe 3 is with a thickness of 10mm~50mm.More preferably, outer working lining 1 is with a thickness of 50mm~70mm, compound transition
Layer 2 is with a thickness of 1.0mm~2.5mm, and internal layer seamless pipe 3 is with a thickness of 20mm~30mm.Wherein, most preferably, outer working lining 1, multiple
Closing the ratio between transition zone 2, thickness of 3 three of internal layer seamless pipe is 30~50:1:20~30.
Embodiment two
Referring to FIG. 2, the manufacturing method that a kind of composite roll of the present embodiment covers, the manufacturing method the following steps are included:
Step 1, prepares the internal layer seamless pipe that the low-carbon seamless steel pipe of predetermined size is covered as composite roll, removal internal layer without
The dirty and oxide layer on slit-tube surface.
Thermite and slag former are mixed to form clay shape for step 2, and are uniformly coated on outside internal layer seamless pipe 3
On surface, the coating layer thickness of thermite and slag former is 0.5mm-5.0mm.
Step 3 will apply the internal layer seamless pipe 3 for being covered with thermite and slag former and be installed in casting die 4, and internal layer is seamless
Temperature when pipe 3 is installed in casting die 4 is controlled at 0 DEG C~500 DEG C.
Melted aluminium alloy is poured into casting die 4 by step 4 from casting gate 5, temperature when aluminium alloy is cast
Control is at 1300 DEG C~1500 DEG C, and thermite and slag former encounter the reaction of high temperature alloy liquid and generate molten iron, molten iron generated
Compound transition zone 2 is collectively formed in the molten iron meeting high temperature alloy liquid with 3 surface of internal layer seamless pipe and melting, naturally cold after the completion of casting
But the composite roll set is obtained.
Preferred embodiment, in step 1, the roughness of 3 outer surface of internal layer seamless pipe is controlled in Ra0.2~Ra6.0.
In step 2, the thermite and slag former include Al powder, Fe2O3Powder, FeO powder, CaCO3Powder, SiO2Powder, wherein
Al powder, Fe2O3Powder, FeO powder, CaCO3Powder, SiO2The weight ratio of powder be 1:2~4:0.2~1.0:0.5~2.0:0.5~
1.5。
In step 2, in step 2, Al powder, the Fe of the specific ingredient of thermite and slag former2O3Powder, FeO powder, CaCO3
Powder, SiO2The partial size of powder is 0.01mm~0.5mm.It theoretically can be by controlling Al powder, Fe2O3Powder, FeO powder, CaCO3Powder,
SiO2The reaction speed and temperature of the granular size control mixed coating of the ratio and powder of powder, to realize compound transition zone
Reaction time can match with aluminium alloy casting rate.
Embodiment three
A kind of roll of the present embodiment, including composite roll set described in embodiment one；Alternatively, including described in embodiment two
Composite roll set manufactured by manufacturing method.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and the highlights of each of the examples are differences from other embodiments.
The embodiments of the present invention is explained in detail in conjunction with attached drawing above, but the utility model is not limited to institute
The embodiment of description.To those skilled in the art, in the case where not departing from the principles of the present invention and spirit
A variety of change, modification, replacement and modification that these embodiments carry out are still fallen within and are within the protection scope of the utility model.
Claims (4)
1. a kind of composite roll set, which is characterized in that the composite roll set includes: outer working lining (1), compound transition zone (2) and interior
Layer seamless pipe (3), the internal layer seamless pipe (3) are prefabricated low-carbon seamless steel pipe, and the outer working lining (1) is cast-in-place wear-resisting
Alloy steel layer, the compound transition zone (2) are that thermite and slag former react with cast-in-place aluminium alloy and generate molten iron and described
The transition zone that is collectively formed of internal layer seamless pipe (3) surface layer fusing molten iron, the outer working lining (1), the compound transition zone (2) and
It is metallurgical bonding between internal layer seamless pipe (3) three；
The axial length of the composite roll set is 0.1m~100m.
2. composite roll set according to claim 1, which is characterized in that the outer working lining (1) with a thickness of 20mm~80mm,
The compound transition zone (2) is with a thickness of 0.1mm~5.0mm, and the internal layer seamless pipe (3) is with a thickness of 10mm~50mm.
3. composite roll set according to claim 2, which is characterized in that the outer working lining (1), the compound transition zone
(2), the ratio between thickness of internal layer seamless pipe (3) three is 30~50:1:20~30.
4. a kind of roll, which is characterized in that including composite roll set as described in claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821453588.6U CN208787207U (en) | 2018-09-06 | 2018-09-06 | Composite roll set and roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821453588.6U CN208787207U (en) | 2018-09-06 | 2018-09-06 | Composite roll set and roll |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208787207U true CN208787207U (en) | 2019-04-26 |
Family
ID=66208590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821453588.6U Active CN208787207U (en) | 2018-09-06 | 2018-09-06 | Composite roll set and roll |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208787207U (en) |
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2018
- 2018-09-06 CN CN201821453588.6U patent/CN208787207U/en active Active
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