CN106670230B - Cogging, tandem rolling and the cold big specification rectangle steel production technology being combined of control - Google Patents
Cogging, tandem rolling and the cold big specification rectangle steel production technology being combined of control Download PDFInfo
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- CN106670230B CN106670230B CN201611206243.6A CN201611206243A CN106670230B CN 106670230 B CN106670230 B CN 106670230B CN 201611206243 A CN201611206243 A CN 201611206243A CN 106670230 B CN106670230 B CN 106670230B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 134
- 239000010959 steel Substances 0.000 title claims abstract description 134
- 238000005096 rolling process Methods 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 238000005516 engineering process Methods 0.000 title claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000010583 slow cooling Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 11
- 241000251468 Actinopterygii Species 0.000 claims abstract description 3
- 239000003034 coal gas Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims 1
- 238000005242 forging Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 7
- 238000005452 bending Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010079 rubber tapping Methods 0.000 description 4
- 239000003570 air Substances 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B1/04—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing in a continuous process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B43/00—Cooling beds, whether stationary or moving; Means specially associated with cooling beds, e.g. for braking work or for transferring it to or from the bed
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a kind of cogging, tandem rolling and the cold big specification rectangle steel production technologies being combined of control, include the following steps：Round steel blank is sent into heating furnace through rollgang and is heated, and the temperature of round steel blank is tapped when 1050 ~ 1150 DEG C of ranges；Utilize the hammer scale of the fish scale-shaped of high pressure descaling machine removal round steel blank surface；Round steel blank is rolled by the band steel blank that section is rectangle by blooming mill；Product rectangle steel is rolled by tandem mill；Rectangle steel is delivered to hot saw area and carries out sawing；Rectangle steel after sawing is delivered to walking beam cooler, and the rectangle steel that outlet is delivered to by cold bed cooling carries out slow cooling, and the temperature that enters to cheat of rectangle steel is controlled in the range of 380 ~ 420 DEG C.It is efficient by the method for the present invention it is found that production technology cost is low, instead of steel ingot forging technology of high cost, so as to expand the specification limit that rectangle steel is produced by tandem rolling mode, the mode of production of big specification rectangle steel is enriched, has started the production new technique of big specification rectangle steel.
Description
Technical field
The present invention relates to a kind of field of band steel Rolling Production, and in particular to a kind of cogging, tandem rolling and control is cold is combined
Big specification rectangle steel production technology.
Background technology
Pallet fork rectangle steel, mold rectangle steel, railway often rectangle steels such as fork rectangle steel, there is the mechanical property of material
Higher requirement, and it is more demanding to appearance and size, it is either used after steel ingot is rolled or forged currently with continuous casting billet；
Wherein thickness is less than 50mm, width is less than the above-mentioned rectangle steel of 150mm, the square billet of small dimension or rectangular bloom multiple tracks in utilization
Secondary continuous rolling process production, ensures its mechanical property and appearance and size；Thickness is more than 50mm, width is more than the above-mentioned square of 150mm
Shape steel carries out forging processing using continuous casting billet or steel ingot.
When being produced using continuous rolling process, specification is limited to the rectangle steel that thickness is less than 150mm less than 50mm, width substantially,
Otherwise mechanical property, appearance and size cannot effectively ensure.
When being produced using forging technology, though product specification is unrestricted, thickness can be produced and be more than more than 50mm, width
The rectangle steel of 150mm, mechanical property, appearance and size can ensure, but production efficiency is low, and the period is long, of high cost.
Invention content
It is an object of the invention to：Overcome the deficiencies of the prior art and provide a kind of cogging, tandem rolling and control it is cold be combined it is big
Specification rectangle steel production technology, production technology cost is low, efficient, instead of steel ingot forging technology of high cost, so as to expand
The specification limit of rectangle steel is produced by tandem rolling mode, the mode of production of big specification rectangle steel is enriched, has started big specification
The production new technique of rectangle steel；By heavy reduction cogging technics, ensure center portion fully deformed, ensure that material is finer and close, greatly
On the basis of width improves the rectangle steel specification of continuous rolling process production, mechanical property is ensured；Pass through the effect of tandem mill, square
Shape steel appearance and size precision controlling is high, and controlling is strong, can be needed to produce the rectangle steel at cross section fillet, right angle according to user；
By cold bed from straightening function and the design of control cooling, rectangle steel can be solved and the problems such as being bent, reversing easily occur；It is fixed
Formula hot saw is combined with mobile hot saw, it is ensured that user's difference cut lengths and tolerance；Thickness is less than or equal to 90mm
Rectangle steel hang in hole slow cooling by having driven a vehicle after close be packaged, rectangle steel slow cooling effect can be made more preferable；Rectangle steel
From rollgang during traversing inlet roller way moves steel, rectangle steel is pushed by traversing inlet roller way by one group of steel-pushing apparatus,
Solve the problems, such as that rectangle steel can not utilize dead weight to move steel to traversing inlet roller way；Cold bed increases insulation cover, avoids cold bed four
All cross-ventilations are big, ensure that cold bed ambient temperature is uniform, prevented because of surrounding inhomogeneous cooling, and lateral bending, torsion occurs in rectangle steel
The problem of.
The technical solution used in the present invention is：
Cogging, tandem rolling and the cold big specification rectangle steel production technology being combined of control, include the following steps：
1）Heating：Round steel blank is sent into heating furnace through rollgang and is heated, and the temperature of round steel blank is 1050 ~ 1150
It taps when DEG C range；
2）Blank surface de-scaling：Utilize the hammer scale of the fish scale-shaped of high pressure descaling machine removal round steel blank surface；
3）Blooming mill carries out split rolling method：Round steel blank is rolled by the band steel blank that section is rectangle by blooming mill；
4）Tandem mill carries out continuous rolling：Product rectangle steel is rolled by tandem mill；
5）Sawing：Rectangle steel is delivered to hot saw area and carries out sawing；
6）Cooling：Rectangle steel after sawing is delivered to walking beam cooler, and the square of outlet is delivered to by cold bed cooling
Shape steel carries out slow cooling, and the temperature that enters to cheat of rectangle steel is controlled in the range of 380 ~ 420 DEG C.
The present invention is further improved scheme, the step 1）In, heating furnace is air, coal gas double-regenerative heating furnace,
Round steel blank is double cloth in heating furnace.
Further improvement project of the invention is the step 1）In, the heating time of round steel blank in heating furnace is 4
In ~ 8 hours.
Further improvement project of the invention is the step 2）In, the high pressure descaling machine is sectional-type annular high pressure
Descaling mill, the maximum pressure of descaling mill pressure is 25MPa, and de-scaling speed is in the range of 0.6 ~ 1.0m/s.
Further improvement project of the invention is the step 3）In, the blooming mill is the reciprocating blooming mill of double roller, is rolled
Roller diameter is Ф 1200mm, and the rolling pass of the blooming mill is in the range of 7 ~ 15 passages.
Further improvement project of the invention is the step 3）In, the maximum single pass rolling reduction of the blooming mill is
120mm。
Further improvement project of the invention is the step 4）In, the tandem mill is flat-vertical 6 frame tandem mill.
Further improvement project of the invention is the step 4）In, the R angles for the rectangle steel that the tandem mill rolls out
Length≤10mm.
Further improvement project of the invention is the step 5）In, when rectangle steel carries out sawing in hot saw area, lead to
It crosses fixed hot saw and carries out sawing with the mode that mobile hot saw is combined.
Further improvement project of the invention is the step 5）In, rectangle steel is delivered to traversing entrance through rollgang
Roller-way, then rectangle steel is delivered on traversing outlet roller-way by translating trolleys.
Further improvement project of the invention is the step 5）In, rectangle steel is by one group of steel-pushing apparatus through conveying roller
Road is delivered to traversing inlet roller way.
Further improvement project of the invention is the step 6）In, it is delivered to cold bed outlet roller-way by cold bed cooling
Rectangle steel, when thickness≤90mm of rectangle steel, rectangle steel is delivered to and is packaged area, rule stacks, and using automatic
After baling press is closely packaged, slow cooling in hole is hung in by driving；When the thickness G T.GT.GT 90mm of rectangle steel, directly by traveling crane
Enter slow cooling in hole.
Further improvement project of the invention is the step 6）In, the surface of cold bed is equipped with insulation cover.
The beneficial effects of the present invention are：
Firstth, cogging of the invention, tandem rolling and the cold big specification rectangle steel production technology being combined of control, production technology cost
It is low, it is efficient, instead of steel ingot forging technology of high cost, so as to expand the specification model that rectangle steel is produced by tandem rolling mode
It encloses, enriches the mode of production of big specification rectangle steel, started the production new technique of big specification rectangle steel.
Secondth, cogging of the invention, tandem rolling and the cold big specification rectangle steel production technology being combined of control, pass through heavy reduction
Cogging technics ensure center portion fully deformed, ensure that material is finer and close, greatly improve the rectangle steel specification of continuous rolling process production
On the basis of, mechanical property is ensured.
Third, the cogging of the present invention, tandem rolling and the cold big specification rectangle steel production technology being combined of control, pass through tandem mill
Effect, rectangle steel appearance and size precision controlling are high, and controlling is strong, can need to produce cross section fillet, right angle according to user
Rectangle steel.
4th, cogging of the invention, tandem rolling and the cold big specification rectangle steel production technology being combined of control, by cold bed from
Straightening function and the design of control cooling, can solve rectangle steel and the problems such as being bent, reversing easily occur.
5th, cogging of the invention, tandem rolling and the cold big specification rectangle steel production technology being combined of control, fixed hot saw with
Mobile hot saw is combined, it is ensured that user's difference cut lengths and tolerance.
6th, cogging of the invention, tandem rolling and the cold big specification rectangle steel production technology being combined of control, thickness are less than or equal to
The rectangle steel of 90mm hangs in hole slow cooling after close be packaged by having driven a vehicle, and rectangle steel slow cooling effect can be made more preferable.
7th, cogging of the invention, tandem rolling and the cold big specification rectangle steel production technology being combined of control, rectangle steel is by conveying
Rectangle steel is pushed into traversing inlet roller way by one group of steel-pushing apparatus, solved by roller-way during traversing inlet roller way moves steel
Rectangle steel can not utilize the problem of dead weight is to traversing inlet roller way shifting steel.
8th, cogging of the invention, tandem rolling and the cold big specification rectangle steel production technology being combined of control, cold bed increase heat preservation
Cover, it is big to avoid cold bed ambient air convection current, ensure that cold bed ambient temperature is uniform, has prevented because of surrounding inhomogeneous cooling, rectangle
There is the problem of lateral bending, torsion in steel.
Specific embodiment
Embodiment 1
Φ 500mm sections continuous cast round billets produce 260 tons, F300X110, and concrete technology method is as follows：
1）Heating：Blank is sent into heating furnace through rollgang and is heated, and heating furnace is air, coal gas double heat storage type heats
Stove, interior stove is double cloth.Heating time is 7 ~ 8 hours, and steel billet is tapped after reaching tapping temperature, and tapping temperature is controlled 1100
~1150℃。
2）High-pressure water descaler：Sectional-type annular high pressure descaling machine removes the hammer scale of billet surface, descaling mill pressure
For 23MPa, de-scaling speed 0.8m/s.
3）Blooming mill is rolled：Blooming mill is the reciprocating blooming mill of double roller, and roller diameter is Ф 1200mm, and large round billet passes through
After blooming mill rolls 13 passages, the specification split rolling method table is formed, is shown in Table 1.
Table 1
4）Continuous rolling：Shut out qualified finished product band steel by tandem mill, tandem mill is flat-vertical 6 frame tandem mill, tandem rolling
Pass schedule is shown in Table 2.
Table 2
5）Sawing：Band steel is sent to traversing inlet roller way through rollgang, then again sends band steel to by translating trolleys traversing
It exports on roller-way.The progress sawing of hot saw area is sent into through exporting roller-way, fixed hot saw is combined with mobile hot saw, according to 9 meters,
Ensure user's difference cut lengths and tolerance.
6）Cooling：Sawing is sent through roller-way to walking beam cooler after terminating, and using cold bed from straightening function, ensures band steel bending
Degree≤3mm/m send to area is packaged through cold bed outlet roller-way, is not packaged, hangs in hole slow cooling by rotary type sucker crane, in hole
Use steelframe, successively "-" type stacking；Enter to cheat temperature control at 385 DEG C ~ 410 DEG C.
Identical trade mark steel grade rolls rear mechanical property comparison with F120X50mm small dimension stockings and is shown in Table 3, big specification rectangle steel
Mechanical property and small dimension rectangle steel are substantially suitable, and there is no because big gauge material causes material comprehensive because cooling velocity is slow
Close mechanical properties decrease.
Table 3
Embodiment 2
Φ 500mm sections continuous cast round billets produce 450 tons of 180X115, and hot sending carries out split rolling method, and concrete technology method is such as
Under：
1）Heating：Blank is sent into heating furnace through rollgang and is heated, and heating furnace is air, coal gas double heat storage type heats
Stove, interior stove is double cloth.Heating time is 7 ~ 8 hours.Steel billet is tapped after reaching tapping temperature, and tapping temperature is controlled 1100
~1150℃。
2）High-pressure water descaler：Sectional-type annular high pressure descaling machine removes the hammer scale of billet surface, descaling mill pressure
For 230bar, de-scaling speed 0.8m/s.
3）Blooming mill is rolled：Blooming mill is the reciprocating blooming mill of double roller, and roller diameter is Ф 1200mm, and large round billet passes through
After blooming mill rolls 13 passages, the specification split rolling method is formed, is shown in Table 4.
Table 4
4）Continuous rolling：Qualified finished product band steel is shut out by tandem mill, tandem mill is flat-vertical 6 frame tandem mill, is formed
Continuous rolling table, is shown in Table 5.
Table 5
5）Sawing：Band steel is sent to traversing inlet roller way through rollgang, then again sends band steel to by translating trolleys traversing
It exports on roller-way.The progress sawing of hot saw area is sent into through exporting roller-way, fixed hot saw is combined with mobile hot saw, according to 9 meters,
Ensure user's difference cut lengths and tolerance.
6）Cooling：Sawing is sent through roller-way to walking beam cooler after terminating, and using cold bed from straightening function, ensures band steel bending
Degree≤3mm/m send to area is packaged through cold bed outlet roller-way, is not packaged, hangs in hole slow cooling by rotary type sucker crane, in hole
Use steelframe, successively "-" type stacking；Enter to cheat temperature control at 385 DEG C ~ 410 DEG C.
Identical trade mark steel grade rolls rear mechanical property comparison with F120X50mm small dimension stockings and is shown in Table 6, big specification rectangle steel
Mechanical property and small dimension rectangle steel are substantially suitable, without because big gauge material causes material to integrate because cooling velocity is slow
Mechanical properties decrease.
Table 6
Claims (8)
1. cogging, tandem rolling and the cold big specification rectangle steel production technology being combined of control, it is characterised in that include the following steps：
1）Heating：Round steel blank is sent into heating furnace through rollgang and is heated, and the temperature of round steel blank is in 1050 ~ 1150 DEG C of models
It taps when enclosing；
2）Blank surface de-scaling：Utilize the hammer scale of the fish scale-shaped of high pressure descaling machine removal round steel blank surface；
3）Blooming mill carries out split rolling method：Round steel blank is rolled by the band steel blank that section is rectangle by blooming mill；It is described
Blooming mill is the reciprocating blooming mill of double roller, and roller diameter is Ф 1200mm, and the rolling pass of the blooming mill is in 7 ~ 15 passages
In the range of；The maximum single pass rolling reduction of the blooming mill is 120mm；
4）Tandem mill carries out continuous rolling：Product rectangle steel is rolled by tandem mill；
5）Sawing：Rectangle steel is delivered to hot saw area and carries out sawing；
6）Cooling：Rectangle steel after sawing is delivered to walking beam cooler, and the rectangle steel of outlet is delivered to by cold bed cooling
It carries out into hole slow cooling, the temperature that enters to cheat of rectangle steel is controlled in the range of 380 ~ 420 DEG C.
2. cogging as described in claim 1, tandem rolling and the cold big specification rectangle steel production technology being combined of control, feature exist
In：The step 1）In, heating furnace is air, coal gas double-regenerative heating furnace, and round steel blank is double cloth in heating furnace.
3. cogging as claimed in claim 2, tandem rolling and the cold big specification rectangle steel production technology being combined of control, feature exist
In：The step 1）In, the heating time of round steel blank in heating furnace is in 4 ~ 8 hours.
4. cogging as described in claim 1, tandem rolling and the cold big specification rectangle steel production technology being combined of control, feature exist
In：The step 2）In, the high pressure descaling machine is sectional-type annular high pressure descaling machine, and the maximum pressure of descaling mill pressure is
25MPa, de-scaling speed is in the range of 0.6 ~ 1.0m/s.
5. cogging as described in claim 1, tandem rolling and the cold big specification rectangle steel production technology being combined of control, feature exist
In：The step 4）In, the tandem mill is flat-vertical 6 frame tandem mill.
6. cogging as claimed in claim 5, tandem rolling and the cold big specification rectangle steel production technology being combined of control, feature exist
In：The step 4）In, the length≤10mm at the R angles for the rectangle steel that the tandem mill rolls out.
7. cogging as described in claim 1, tandem rolling and the cold big specification rectangle steel production technology being combined of control, feature exist
In：The step 5）In, when rectangle steel carries out sawing in hot saw area, it is combined by fixed hot saw with mobile hot saw
Mode carry out sawing.
8. cogging as described in claim 1, tandem rolling and the cold big specification rectangle steel production technology being combined of control, feature exist
In：The step 6）In, the rectangle steel of cold bed outlet roller-way is delivered to by cold bed cooling, as thickness≤90mm of rectangle steel
When, rectangle steel is delivered to and is packaged area, after rule stacks, and use automatic packing machine is closely packaged, hole is hung in by driving
Interior slow cooling；When the thickness G T.GT.GT 90mm of rectangle steel, slow cooling in hole is directly hung in by driving.
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| CN112496032B (en) * | 2020-11-23 | 2022-09-02 | 浙江天马轴承集团有限公司 | Rolling production process of 30Cr15MoN high-nitrogen martensitic stainless steel bar |
| CN114888079A (en) * | 2022-05-11 | 2022-08-12 | 包头钢铁（集团）有限责任公司 | Rolling process of 38CrMoAl round steel |
| CN114918249A (en) * | 2022-05-21 | 2022-08-19 | 湖南华菱湘潭钢铁有限公司 | Production method of large-size gear round steel |
| CN116516237A (en) * | 2023-06-27 | 2023-08-01 | 湖南华菱湘潭钢铁有限公司 | Production method of large-specification round steel |
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