CN209531721U - Eliminate the edge roller of micro alloyed steel slab trapezoid cross section defect - Google Patents
Eliminate the edge roller of micro alloyed steel slab trapezoid cross section defect Download PDFInfo
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- CN209531721U CN209531721U CN201920034119.9U CN201920034119U CN209531721U CN 209531721 U CN209531721 U CN 209531721U CN 201920034119 U CN201920034119 U CN 201920034119U CN 209531721 U CN209531721 U CN 209531721U
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- 230000007547 defect Effects 0.000 title claims abstract description 67
- 229910000742 Microalloyed steel Inorganic materials 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 abstract description 25
- 239000010959 steel Substances 0.000 abstract description 25
- 239000002184 metal Substances 0.000 abstract description 16
- 229910052751 metal Inorganic materials 0.000 abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052742 iron Inorganic materials 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000001125 extrusion Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 14
- 238000005096 rolling process Methods 0.000 description 12
- 238000012545 processing Methods 0.000 description 10
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- 238000005457 optimization Methods 0.000 description 4
- 230000001154 acute effect Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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- 229910052720 vanadium Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a kind of edge rollers for eliminating micro alloyed steel slab trapezoid cross section defect comprising has roller main body, is equipped in the upper/lower terminal of roller main body with bevelled flanged structure；The roller main body is reverse frustoconic, angle β=8 °~15 ° in rotary table sideline and vertical line.The roller main body of this edge roller is reverse frustoconic, make the slab of trapezoid cross section during carrying out secondary flanging operation, its leptoprosopy will receive effective plastic extrusion, metal is promoted to flow from the long border region of slab trapezoid cross section to short side direction, to make the cross sectional shape of slab be restored to rectangle again from trapezoidal, and then secondary blank pressing technology effect is enable really to bring into play.Slab trapezoid cross section defect can be effectively eliminated using this edge roller, and then defect problem is directly split on the side for the generous plate of micro alloyed steel for really efficiently solving long-standing problem iron and steel enterprise, promotes the generous plate surface quality of micro alloyed steel.
Description
Technical field
The utility model relates to a kind of edge roller, especially a kind of flanging for eliminating micro alloyed steel slab trapezoid cross section defect
Roller.
Background technique
In recent years, each steel-making enterprise has generallyd use big chamfer crystallizer equipment, carries out chamfered by production corner
Slab (hereinafter referred to as: chamfering slab) solve slab transverse corner crack defect.Its main operational principle is: optimization slab corner
Shape makes its chamfered shape, to optimize its corner temperature, it is avoided to fall into third brittle zone model in aligning fan-shaped section section
In enclosing, to effectively eliminate the generation of drawbacks described above.But it is found in subsequent production, although the transverse corner crack of chamfering slab lacks
The sunken edge for having substantially eliminated, but having become a useful person directly is split defect (hereinafter referred to as: directly splitting on side) and is extremely highlighted.Currently, this defect is
A kind of mass defect problem paid high attention to as domestic each Heavy Plate Production enterprise.
So-called " directly splitting defect in side " refers to the linear type surface defect for appearing in sheet material edge after slab rolling, generates
Position is about 10~60mm away from sheet edge, and crack depth is 200 μm~2mm, caused by exterior appearance and steel slab surface lobe
Strip defect is similar.This defect is typically easy to the phenomenon on the steel grades such as pipe line steel, ship steel, high-strength steel for engineering mechanism purpose, occurs
Rate is up to 80% or more, seriously affects the development of enterprise's new product.In particular with the progress of steel production in China technology, respectively
The high-intensitive wide and thick slab yield of kind increases year by year, and the requirement to plate surface quality is constantly increased, the generous plate defect of microalloy
The problem of seem more prominent, and have extensive generality.
Shown by the bulk trial at scene: the main reason for causing Wide and Thick Slab edge directly to split defect is due in life
During production, slab corner temperature is reduced relatively faster, and the opposite α phase transition of γ preferentially occurs for corner, due to the drag of its deformation
It is big compared with other regions, therefore the deflection of corner metal during the rolling process is relatively small, in the middle part of slab leptoprosopy and the change in corner
Shape difference is big, to cause leptoprosopy in slab spreading process to form folding, and in the subsequent operation of rolling, this folding is formed
Longitudinal crack can be turned to the edge in wide face, ultimately cause the generation that side is directly split.
Iron and steel enterprise is directly split for generous edges of boards there are mainly two types of traditional remedial measures of defect, first is that slab corner
The processing of flame corner cut is carried out, second is that carrying out trimming processing to steel plate.Above two method can reduce width to a certain extent
Slab edge directly splits the incidence of defect, but disadvantage is also very obvious: carrying out the processing of flame corner cut to connecting plate base and not only causes
Mass energy, material, the waste of human resources and the increasing of inventory lot, and since connecting plate base must offline carry out cold conditions
Cleaning, this makes the hot charging of slab or hot sending become impossible, and the heating energy consumption of slab is significantly increased, while steel smelting-continuous casting-
The high-efficiency reform rhythm of steel rolling process is also disturbed；And cutting edge processing is carried out to Wide and Thick Slab, it will cause the lumber recovery of steel is big
Width decline, production cost greatly improve.
Handan Iron and Steel Co, by studying for a long period of time, has initiated the secondary crimping technique of slab, by chamfering with Beijing Iron and Steel Research Geueral Institute
Slab carries out secondary flanging processing, to efficiently solve this kind of defect, incidence is by 80% or more before process optimization, surely
Surely 0.5% is down to hereinafter, effect is fairly obvious.
So-called secondary flanging, mainly by the way that edge roller is arranged in conticaster end fan-shaped section outlet port, position is logical
It crosses hydraulic device to be controlled, further flanging is done by the chamfering to slab edge and is handled, make edge metal that high temperature modeling occur
Property deformation, to optimize its surface topography, promote the uniformity of slab corner temperature further, alleviate because of slab folding corner region
Metal folding phenomenon caused by due to cooling temperature unevenness, effectively eliminates the generation that steel plate edge directly splits defect.
In the specific implementation process of technology, edge roller is the core component of secondary flanging equipment.Traditional edge roller such as Fig. 1
Shown, body shape is cylinder, while respectively designing the flanged structure with the angle α inclined-plane in the upper/lower terminal of cylinder,
The control range at its angle α is 25 °~45 °.The purpose designed in this way, being can be using edge roller flanged structure to big chamfering
The chamfering of normal section slab as shown in Figure 2 is squeezed, and the metallic region near it is plastically deformed, specific implementation
Process, as shown in Figure 3；So that the chamfering quantity of each folding corner region of slab increases to 2 from 1, chamfer angle is obtained
It further increases, to effectively increase the slab corner temperature in the operation of rolling；Can thus it fully control and eliminate angle
In the case where portion's transverse crack, achieve the purpose that optimization slab corner shape, elimination plate side directly split defect.
But it is found in actual production process, traditional edge roller roll shape is although can effectively solve the problem that normal section chamfering
Defect problem is directly split on side after slab rolling, but can not effectively solve the chamfering as shown in Figure 4 there is trapezoid cross section defect
Directly split defect problem in the back of rolling of slab.
As shown in figure 4, so-called slab " trapezoid cross section defect ", refers to, inside and outside arc different from the normal section of slab
Do not have mutual vertical between face and leptoprosopy, an angle φ is presented in leptoprosopy and vertical plane, and the size at the angle φ is in 8 °~12 ° ranges
It is interior.The wide face cross-sectional length of inner arc of slab is greater than the wide face cross-sectional length of outer arc simultaneously.Therefore, the cross sectional shape of slab is presented one
Trapezoidal, one lesser acute angle of presentation between the intrados and leptoprosopy of slab of a handstand.When the edge roller using traditional roll shape
When (as shown in Figure 1) carries out flattening processing to trapezoid cross section defect slab, although equally can the chamfering to this kind of slab carry out
It squeezes, is plastically deformed the metallic region near it, specific implementation process is as shown in Figure 5；Again such that each angle of slab
The chamfering quantity in portion region increases to 2 from 1, but due to the acute angle presented between slab intrados and leptoprosopy do not occur it is bright
Aobvious variation, therefore the temperature drop speed of the temperature drop speed of the regional metal during the rolling process and the slab corner that flanging processing is not carried out
Degree is compared, and apparent change does not occur.Therefore, this kind of defect slab still holds in the subsequent generous plate operation of rolling
It is also easy to produce side and directly splits defect.
The slab for trapezoid cross section defect occur often focuses on micro alloyed steel.This is because due to being added in micro alloyed steel
After the microalloy elements such as Nb, V, Ti, the third brittle temperature range of steel grade is more wide in range, it may be assumed that the temperature of related steel grade is quick
Perception is stronger, easily generation corner fine crack defect.Although having effectively reduced slab angle by the big chamfered of slab
The probability of happening of portion's fine crack defect, but in order to avoid the temperature in slab corner falls into related steel near conticaster aligning area
The third brittle temperature range of kind, field technician often implement weak cold to micro alloyed steel slab in secondary cooling link
Technique, it may be assumed that reduce secondary cooling water flow.Due to consideration that the difference of the wide face of slab inner arc and the wide face structure of outer arc (slab
The wide face of inner arc easily accumulates cooling water) influence to the inside and outside arc side portion temperature of slab, therefore scene is often by the wide face of slab inner arc
Region cooling water flow adjust it is lower, the temperature for having eventually led to the wide face region of slab inner arc is higher than the area outer arc Kuan Mian
The temperature in domain.Therefore, metal of the metal in the wide face region of slab inner arc compared with the wide face region of outer arc, it is easier to be plastically deformed.
For the internal soundness for ensuring slab, field technician can carry out dynamic soft-reduction processing to slab toward contact, it may be assumed that pass through sector
Frame declines a certain amount of displacement in section, applies downward pressure to slab inner arcuate surface, thus the uniformly molten steel of slab wick-containing
Ingredient and soldering core solve the segregation and rarefaction defect inside slab because molten steel solidification is formed by cavity.In this process
In, the metal in the wide face of slab inner arc can start to flow along wide face and perpendicular to pulling rate direction to corner direction under the effect of the pressure
It is dynamic, to cause the wide face of slab inner arc no longer vertical with leptoprosopy, so that the trapezoid cross section defect of slab be made to preliminarily form.Work as slab
After aligning area into continuous casting, overall pattern can become straight from original arc.In this course, the inside and outside arc of slab
It wide face can be by the stress for receiving different directions.Wherein, the wide face metal of slab inner arc will receive tensile stress, to promote metal can be into
One step is flowed along wide face and perpendicular to pulling rate direction to corner direction；And the wide face metal of slab outer arc will receive compression, thus
Promote metal along wide face and perpendicular to pulling rate direction, is flowed from corner to centre of surface, to ultimately form the trapezoidal of slab
Section defect.
By above-mentioned analysis it is found that the trapezoid cross section defect of micro alloyed steel slab, is that the steel grade slab is being avoided angle occur
Portion's micro-crack defect and internal segregation, rarefaction defect, it is ensured that formed in the process implementing process of plate surface and internal soundness
's.Therefore, it goes to solve the Feasible degree of the trapezoid cross section defect of micro alloyed steel slab to be lower using the method for optimization technique.Together
When, defect problem is directly split using the side that traditional secondary flanging measure also can not effectively solve such product.Therefore, for above-mentioned
Problem breaks traditional approach, develops a kind of equipment, method for effectively eliminating micro alloyed steel slab trapezoid cross section defect, finally
Defect is directly split on the side for effectively solving micro alloyed steel product, for promoting the product quality of iron and steel enterprise, expands Business Economic Benefit
It has a very important significance.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of elimination micro alloyed steel slab that flanging effect is good is trapezoidal
The edge roller of section defect.
In order to solve the above technical problems, technical solution adopted in the utility model is: it includes roller main body, in roller master
The upper/lower terminal of body is equipped with bevelled flanged structure；The roller main body is reverse frustoconic, the folder in rotary table sideline and vertical line
Angle beta=8 °~15 °.
The inclined-plane of upper flange described in the utility model and angle α=25 °~45 ° of horizontal plane, the inclined-plane and level of lower flange
Angle ε=15 °~20 ° in face.
The beneficial effects of adopting the technical scheme are that the roller main body of the utility model is reverse frustoconic, make
For the slab of trapezoid cross section during carrying out secondary flanging operation, leptoprosopy will receive effective plastic extrusion, promote metal
It is flowed from the long border region of slab trapezoid cross section to short side direction, so that the cross sectional shape of slab be made to be restored to again from trapezoidal
Rectangle, and then secondary blank pressing technology effect is enable really to bring into play.It is trapezoidal that slab can be effectively eliminated using the utility model
Section defect, and then the side for the generous plate of micro alloyed steel for really efficiently solving long-standing problem iron and steel enterprise is directly split defect and is asked
Topic promotes the generous plate surface quality of micro alloyed steel, to create significant economic benefit for enterprise.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
Fig. 1 is the roll shape structure schematic diagram of traditional edge roller；
Fig. 2 is the chamfering slab schematic diagram with normal rectangular section；
Fig. 3 is the operation chart that traditional edge roller carries out secondary flanging to the chamfering slab in normal section；
Fig. 4 is the chamfering slab schematic diagram with trapezoid cross section defect；
Fig. 5 is the operation chart that traditional edge roller carries out secondary flanging to the chamfering slab of trapezoid cross section；
Fig. 6 is the roll shape structure schematic diagram of the utility model；
Fig. 7 is the operation chart that the utility model carries out secondary flanging to the chamfering slab of trapezoid cross section.
In the figure, it is marked as traditional edge roller 1, the chamfering slab 2 with normal rectangular section, this edge roller 3, have it is trapezoidal
The chamfering slab 4 of section defect.
Primary symbols explanation:
α is respectively the folder on the inclined-plane of the upper and lower flange of traditional edge roller and the inclined-plane of this edge roller upper flange and horizontal plane
Angle；
L1 is respectively the diameter of disc at the top of traditional upper and lower flange top disc of edge roller and this edge roller upper flange；
H is respectively the total height of traditional edge roller and this edge roller；
H1 is respectively the roller main body height of traditional edge roller and this edge roller；
S is the length of the chamfering bevel edge of the chamfering slab with normal rectangular section；
θ is the chamfering bevel edge of big chamfering slab and the angle of horizontal plane；
φ is with the chamfering slab leptoprosopy of trapezoid cross section defect and the angle of vertical plane；
L2 is the diameter of disc at the top of this edge roller lower flange；
β is the angle in this edge roller truncated cone-shaped main body sideline and vertical plane；
ε is the angle on this edge roller lower flange inclined-plane and horizontal plane.
Specific embodiment
Shown in Fig. 2, Fig. 3, the normal rectangular section chamfering slab 2 with chamfering the length of the hypotenuse S and tiltangleθ is traditional
Under the extruding of edge roller 1, chamfer shape can occur adequately to change, so that the chamfering number of each folding corner region of slab
Amount increases to 2 from 1, and chamfer angle is further increased, to effectively increase the slab corner temperature in the operation of rolling
Degree has achieved the purpose that eliminating Wide and Thick Slab edge directly splits defect.Shown in Fig. 1, wherein the angle α of traditional edge roller is 25 °~45 °,
The length of L1 is 290mm~350mm, and the height of H is 320mm~370mm, and the height of H1 is 220mm~280mm.
Shown in Fig. 4, trapezoid cross section defect slab 4 although under the influence of identical chamfer crystallizer, chamfering the length of the hypotenuse S and
Tiltangleθ is identical as normal rectangular section chamfering slab 2, but due to being influenced by external production technique, section becomes
Shape becomes inverted trapezoidal by rectangle, and φ is usually 8 °~12 °, so as to form trapezoid cross section defect.
As shown in figure 5, traditional edge roller 1 is when carrying out secondary flanging processing to trapezoid cross section defect slab 4, due to by
The influence of slab Cross Section Morphology makes the metallic region near it although can equally squeeze the chamfering of this kind of slab
It is plastically deformed, and again such that the chamfering quantity of each folding corner region of slab 4 increases to 2 from 1；But due in slab
Significant change, therefore the temperature drop speed of the regional metal during the rolling process do not occur for the acute angle presented between cambered surface and leptoprosopy
Compared with the temperature drop speed in slab corner of flanging processing is not carried out, apparent change does not occur.Therefore, this kind of defect slab
In the subsequent generous plate operation of rolling, still it is easy to produce side and directly splits defect.
The edge roller of this elimination micro alloyed steel slab trapezoid cross section defect and traditional edge roller 1 are in the data of L1, H, H1
Identical, the length of L1 is 290mm~350mm, the height of H is 320mm~370mm, the height of H1 is 220mm~280mm.In order to
Can effectively solve the trapezoid cross section defect of slab 4, this edge roller by the roller main body of edge roller be designed to a upper bottom surface product it is big, under
The small reverse frustoconic of floor space；Rotary table sideline and vertical line are in the angle β, and the size at the angle β is 8 °~15 °.
As shown in fig. 6, after this edge roller 3 is contacted with the slab 4 there are trapezoid cross section defect, so that this edge roller 3
Main structure can adequately squeeze the leptoprosopy of the slab 4 there are trapezoid cross section defect, force the wide face of 4 inner arc of slab with
Plastic deformation effectively occurs for the metal of leptoprosopy intersecting area, and adequately flows to the outer arc direction of slab 4, by causing metal
Flowing, reach the angle between the wide face of the inside and outside arc of slab 4 and leptoprosopy within the scope of 85 °~95 °, thus by 4 section of slab
It is rectangle by original trapezoidal readjust, solves the trapezoid cross section defect problem of slab 4.In addition, the trapezoid cross section of slab 4 lacks
Falling into influences whether edge roller to the squeezing effect of the wide face position chamfering of slab outer arc；In order to effectively avoid the generation of this problem,
The surface quality for ensuring finish to gauge Wide and Heavy Plates continues to press with tradition in the angle α for ensuring 4 upper flange inclined-plane of edge roller and horizontal plane
Under the premise of the inclined-plane of 1 upper flange of side roller and the angle of horizontal plane are consistent, it may be assumed that α is still maintained at 25 °~45 ° of basis
On, the angle ε on the inclined-plane of lower flange and horizontal plane is reduced to 15 °~20 °, to expand lower flange and trapezoid cross section defect plate
Contact area near the wide face of the outer arc of base 4 is operated from secondary flanging is completed.
Use statistics: the flanging case of statistics three steel mill of Handan Iron and Steel Co, using traditional edge roller to rectangular section chamfering slab
Secondary flanging is carried out, through statistics 1000, wherein 995 generous plates are boundless directly to split defect, it is seen that it effectively eliminates square
Directly split defect in the side of tee section chamfering slab.Secondary flanging is carried out to trapezoid cross section chamfering slab using traditional edge roller, through uniting
Meter 5, wherein 4 generous plates have side directly to split defect, it is seen that its side that can not effectively eliminate trapezoid cross section chamfering slab is straight
Split defect.Secondary flanging is carried out to trapezoid cross section chamfering slab using this edge roller, through statistics 1000, wherein 999 generous
Plate is boundless directly to split defect, it is seen that directly splits defect in its side for effectively eliminating trapezoid cross section chamfering slab.
Claims (2)
1. a kind of edge roller for eliminating micro alloyed steel slab trapezoid cross section defect comprising have roller main body, in the upper and lower of roller main body
Both ends are equipped with bevelled flanged structure, it is characterised in that: the roller main body is reverse frustoconic, rotary table sideline and vertical line
Angle β=8 °~15 °.
2. the edge roller according to claim 1 for eliminating micro alloyed steel slab trapezoid cross section defect, it is characterised in that: described
The inclined-plane of upper flange and angle α=25 °~45 ° of horizontal plane, the inclined-plane of lower flange and angle ε=15 °~20 ° of horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920034119.9U CN209531721U (en) | 2019-01-09 | 2019-01-09 | Eliminate the edge roller of micro alloyed steel slab trapezoid cross section defect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920034119.9U CN209531721U (en) | 2019-01-09 | 2019-01-09 | Eliminate the edge roller of micro alloyed steel slab trapezoid cross section defect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209531721U true CN209531721U (en) | 2019-10-25 |
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ID=68268965
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920034119.9U Expired - Fee Related CN209531721U (en) | 2019-01-09 | 2019-01-09 | Eliminate the edge roller of micro alloyed steel slab trapezoid cross section defect |
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| Country | Link |
|---|---|
| CN (1) | CN209531721U (en) |
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2019
- 2019-01-09 CN CN201920034119.9U patent/CN209531721U/en not_active Expired - Fee Related
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