CN106670230A - Large-size rectangular steel production process with cogging, continuous rolling and cooling control combined - Google Patents
Large-size rectangular steel production process with cogging, continuous rolling and cooling control combined Download PDFInfo
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- CN106670230A CN106670230A CN201611206243.6A CN201611206243A CN106670230A CN 106670230 A CN106670230 A CN 106670230A CN 201611206243 A CN201611206243 A CN 201611206243A CN 106670230 A CN106670230 A CN 106670230A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 138
- 239000010959 steel Substances 0.000 title claims abstract description 138
- 238000005096 rolling process Methods 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 238000001816 cooling Methods 0.000 title claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000010583 slow cooling Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000005516 engineering process Methods 0.000 claims description 30
- 238000012856 packing Methods 0.000 claims description 9
- 239000003034 coal gas Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 238000005242 forging Methods 0.000 abstract description 5
- 238000010079 rubber tapping Methods 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 238000005452 bending Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003570 air Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000009749 continuous casting 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
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- 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 large-size rectangular steel production process with cogging, continuous rolling and cooling control combined. The large-size rectangular steel production process comprises the following steps that a round steel blank is fed into a heating furnace to be heated through a conveying roller way, and steel tapping is carried out when the temperature of the round steel blank ranges from 1,050 DEG C to 1,150 DEG C; a high-pressure descaling machine is used for removing scaly oxidization scrap iron on the surface of the round steel blank; the round steel blank is burst into a flat steel blank with the rectangular section through a cogging mill; finished rectangular steel is obtained through rolling of a continuous rolling machine; the rectangular steel is conveyed to a hot saw area to be sawn; and the rectangular steel obtained after sawing is finished is conveyed to a stepping cooling bed, the rectangular steel cooled and conveyed to an outlet through the cooling bed is subjected to slow cooling, and the in-pit temperature of the rectangular steel is controlled to range from 380 DEG C to 420 DEG C. By means of the method of the process, the production process is low in cost and high in efficiency, a high-cost steel ingot forging process is replaced, and therefore the size range of the rectangular steel produced in a continuous rolling manner is widened, the production manner of the large-size rectangular steel is enriched, and the new production process of the large-size rectangular steel is created.
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 cold combining
Big specification rectangle steel production technology.
Background technology
Pallet fork rectangle steel, mould rectangle steel, the railway often rectangle steel such as fork rectangle steel, has to the mechanical property of material
Higher requirement, and higher to profile dimensional requirement, currently with continuous casting billet, either steel ingot is rolled or used after being forged；
Wherein thickness is less than the above-mentioned rectangle steel of 150mm, the square billet of small dimension or rectangular bloom multiple tracks in utilization less than 50mm, width
Secondary continuous rolling process production, it is ensured that its mechanical property and overall dimensions；Above-mentioned square of the thickness more than 50mm, width more than 150mm
Shape steel, using continuous casting billet or steel ingot forging processing is carried out.
When being produced using continuous rolling process, specification is limited to rectangle steel of the thickness less than 50mm, width less than 150mm substantially,
Otherwise mechanical property, overall dimensions 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, overall dimensions can ensure that, but production efficiency is low, and the cycle is long, high cost.
The content of the invention
It is an object of the invention to：Overcome the deficiencies in the prior art, there is provided a kind of cogging, tandem rolling and control it is cold combine it is big
Specification rectangle steel production technology, production technology cost is low, efficiency high, the steel ingot forging technology of high cost is instead of, 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, big specification has been started
The production new technique of rectangle steel；By heavy reduction cogging technics, it is ensured that center portion fully deforms, it is ensured that material is finer and close, greatly
Width is improved on the basis of the rectangle steel specification of continuous rolling process production, and mechanical property is ensured；By the effect of tandem mill, square
Shape steel overall dimensions 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, the problems such as rectangle steel can be solved easily occurring bending, reverse；It is fixed
Formula hot saw is in combination with portable 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 closely packing, rectangle steel slow cooling effect can be made more preferable；Rectangle steel
Moved during steel from rollgang to traversing inlet roller way, rectangle steel be pushed into into traversing inlet roller way by one group of steel-pushing apparatus,
Solve the problems, such as that rectangle steel cannot move steel using deadweight to traversing inlet roller way；Cold bed increases thermal insulation cover, it is to avoid cold bed four
All cross-ventilations are big, it is ensured that cold bed ambient temperature is uniform, has prevented because of surrounding inhomogeneous cooling, and rectangle steel lateral bending occurs, reverses
Problem.
The technical solution used in the present invention is：
Cogging, tandem rolling and the cold big specification rectangle steel production technology for combining of control, comprise the following steps：
1）Heating：Round steel blank Jing rollgangs are sent into heating furnace and are heated, and the temperature of round steel blank is in 1050 ~ 1150 DEG C of models
Tap when enclosing；
2）Blank surface de-scaling：The cataphracted hammer scale of round steel blank surface is removed using high pressure descaling machine；
3）Blooming mill carries out split rolling method：By blooming mill by the frying of round steel blank into the band steel blank that section is rectangle；
4）Tandem mill carries out continuous rolling：Product rectangle steel is rolled into by tandem mill；
5）Sawing：Rectangle steel is delivered to hot saw area and carries out sawing；
6）Cooling：Rectangle steel after sawing terminates is delivered to walking beam cooler, and through cold bed cooling the rectangle steel of outlet is delivered to
Carry out slow cooling, rectangle steel enters to cheat temperature control in the range of 380 ~ 420 DEG C.
Further improvement project is the present invention, the step 1）In, heating furnace be 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, heat time heating time of the 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 of the rectangle steel that the tandem mill is rolled out
Length≤10mm.
Further improvement project of the invention is, the step 5）In, rectangle steel leads to when hot saw area carries out sawing
Crossing mode of the fixed hot saw in combination with portable hot saw carries out sawing.
Further improvement project of the invention is, the step 5）In, rectangle steel Jing rollgangs are delivered to traversing entrance
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 passes through one group of steel-pushing apparatus Jing 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 through cold bed cooling
Rectangle steel, when the thickness≤90mm of rectangle steel, rectangle steel is delivered to into packing area, rule stacks, and using automatic
Baling press closely after packing, by driving slow cooling in hole is hung in；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 provided with thermal insulation cover.
The beneficial effects of the present invention is：
Firstth, the cogging of the present invention, tandem rolling and the cold big specification rectangle steel production technology for combining of control, production technology cost is low,
Efficiency high, instead of the 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, the production new technique of big specification rectangle steel has been started.
Secondth, the cogging of the present invention, tandem rolling and the cold big specification rectangle steel production technology for combining of control, by heavy reduction
Cogging technics, it is ensured that center portion fully deforms, it is ensured 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.
3rd, cogging of the invention, tandem rolling and the cold big specification rectangle steel production technology for combining of control, by tandem mill
Effect, rectangle steel overall dimensions precision controlling is 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 control the cold big specification rectangle steel production technology for combining, by cold bed from
Straightening function and the design of control cooling, the problems such as rectangle steel can be solved easily occurring bending, reverse.
5th, cogging of the invention, tandem rolling and control the cold big specification rectangle steel production technology for combining, fixed hot saw with
Portable hot saw combines, 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 for combining of control, thickness is less than or equal to
The rectangle steel of 90mm hangs in hole slow cooling after closely packing 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 for combining is controlled, rectangle steel is by conveying
Roller-way to traversing inlet roller way is moved during steel, and rectangle steel is pushed into into traversing inlet roller way by one group of steel-pushing apparatus, is solved
Rectangle steel cannot utilize deadweight that the problem of steel is moved to traversing inlet roller way.
8th, cogging of the invention, tandem rolling and the cold big specification rectangle steel production technology for combining of control, cold bed increases insulation
Cover, it is to avoid cold bed ambient air convection current is big, it is ensured that cold bed ambient temperature is uniform, has prevented because of surrounding inhomogeneous cooling, rectangle
There is lateral bending, the problem reversed in steel.
Specific embodiment
Embodiment 1
Φ 500mm sections continuous cast round billets produce 260 tons, and F300X110, concrete technology method is as follows：
1）Heating：Blank Jing rollgangs send into heating furnace heated, heating furnace be air, coal gas double-regenerative heating furnace,
It is double cloth in stove.Heat time heating time is 7 ~ 8 hours, and steel billet reaches and tapped after tapping temperature, tapping temperature control 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, large round billet Jing
Blooming mill is rolled after 13 passages, forms the specification split rolling method table, is shown in Table 1.
Table 1
4）Continuous rolling：Qualified finished product band steel is shut out by tandem mill, tandem mill is flat-vertical 6 frame tandem mill, continuous rolling
Table, is shown in Table 2.
Table 2
5）Sawing：Band steel Jing rollgangs are sent to traversing inlet roller way, then by translating trolleys band steel are sent to traversing outlet again
On roller-way.Jing outlet roller-ways send into hot saw area and carry out sawing, in combination with fixed hot saw is with movable type hot saw, according to 9 meters, it is ensured that
User's difference cut lengths and tolerance.
6）Cooling：Jing roller-ways deliver to walking beam cooler after sawing terminates, using cold bed from straightening function, it is ensured that band steel bends
Degree≤3mm/m, Jing cold beds outlet roller-way delivers to packing area, does not pack, and hole slow cooling is hung in by rotary type sucker crane, in hole
Using steelframe, successively yi word pattern is piled up；Enter to cheat temperature control at 385 DEG C ~ 410 DEG C.
Identical trade mark steel grade, rolls rear mechanical property contrast and is shown in Table 3 with F120X50mm small dimension stockings, big specification rectangle steel
Mechanical property is substantially suitable with small dimension rectangle steel, not because big gauge material is slow because of rate of cooling, causes material comprehensive
Close mechanical properties decrease.
Table 3
Embodiment 2
Φ 500mm sections continuous cast round billets produce 450 tons of 180X115, and heat is sent into row split rolling method, and concrete technology method is as follows：
1）Heating：Blank Jing rollgangs send into heating furnace heated, heating furnace be air, coal gas double-regenerative heating furnace,
It is double cloth in stove.Heat time heating time is 7 ~ 8 hours.Steel billet reaches and tapped after tapping temperature, tapping temperature control 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, large round billet Jing
Blooming mill is rolled after 13 passages, forms the specification split rolling method, 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, forms tandem rolling
Pass schedule, is shown in Table 5.
Table 5
5）Sawing：Band steel Jing rollgangs are sent to traversing inlet roller way, then by translating trolleys band steel are sent to traversing outlet again
On roller-way.Jing outlet roller-ways send into hot saw area and carry out sawing, in combination with fixed hot saw is with movable type hot saw, according to 9 meters, it is ensured that
User's difference cut lengths and tolerance.
6）Cooling：Jing roller-ways deliver to walking beam cooler after sawing terminates, using cold bed from straightening function, it is ensured that band steel bends
Degree≤3mm/m, Jing cold beds outlet roller-way delivers to packing area, does not pack, and hole slow cooling is hung in by rotary type sucker crane, in hole
Using steelframe, successively yi word pattern is piled up；Enter to cheat temperature control at 385 DEG C ~ 410 DEG C.
Identical trade mark steel grade, rolls rear mechanical property contrast and is shown in Table 6 with F120X50mm small dimension stockings, big specification rectangle steel
Mechanical property is substantially suitable with small dimension rectangle steel, without because big gauge material is slow because of rate of cooling, causes material synthesis
Mechanical properties decrease.
Table 6
Claims (10)
1. cogging, tandem rolling and the cold big specification rectangle steel production technology for combining is controlled, it is characterised in that comprise the following steps：
1）Heating：Round steel blank Jing rollgangs are sent into heating furnace and are heated, and the temperature of round steel blank is in 1050 ~ 1150 DEG C of models
Tap when enclosing；
2）Blank surface de-scaling：The cataphracted hammer scale of round steel blank surface is removed using high pressure descaling machine；
3）Blooming mill carries out split rolling method：By blooming mill by the frying of round steel blank into the band steel blank that section is rectangle；
4）Tandem mill carries out continuous rolling：Product rectangle steel is rolled into by tandem mill；
5）Sawing：Rectangle steel is delivered to hot saw area and carries out sawing；
6）Cooling：Rectangle steel after sawing terminates is delivered to walking beam cooler, and through cold bed cooling the rectangle steel of outlet is delivered to
Carry out into hole slow cooling, rectangle steel enters to cheat temperature control in the range of 380 ~ 420 DEG C.
2. cogging as claimed in claim 1, tandem rolling and the cold big specification rectangle steel production technology for combining is controlled, its feature exists
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 for combining is controlled, its feature exists
In：The step 1）In, heat time heating time of the round steel blank in heating furnace is in 4 ~ 8 hours.
4. cogging as claimed in claim 1, tandem rolling and the cold big specification rectangle steel production technology for combining is controlled, its feature exists
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 claimed in claim 1, tandem rolling and the cold big specification rectangle steel production technology for combining is controlled, its feature exists
In：The step 3）In, the blooming mill is the reciprocating blooming mill of double roller, and roller diameter is Ф 1200mm, the blooming mill
Rolling pass is in the range of 7 ~ 15 passages.
6. cogging as claimed in claim 5, tandem rolling and the cold big specification rectangle steel production technology for combining is controlled, its feature exists
In：The step 3）In, the maximum single pass rolling reduction of the blooming mill is 120mm.
7. cogging as claimed in claim 1, tandem rolling and the cold big specification rectangle steel production technology for combining is controlled, its feature exists
In：The step 4）In, the tandem mill is flat-vertical 6 frame tandem mill.
8. cogging as claimed in claim 7, tandem rolling and the cold big specification rectangle steel production technology for combining is controlled, its feature exists
In：The step 4）In, the length≤10mm at the R angles of the rectangle steel that the tandem mill is rolled out.
9. cogging as claimed in claim 1, tandem rolling and the cold big specification rectangle steel production technology for combining is controlled, its feature exists
In：The step 5）In, rectangle steel when hot saw area carries out sawing, by fixed hot saw in combination with portable hot saw
Mode carry out sawing.
10. cogging as claimed in claim 1, tandem rolling and the cold big specification rectangle steel production technology for combining is controlled, its feature exists
In：The step 6）In, the rectangle steel that cold bed exports roller-way is delivered to through cold bed cooling, as the thickness≤90mm of rectangle steel
When, rectangle steel is delivered to into packing area, rule is stacked, and after closely packing using automatic packing machine, by driving hole is hung in
Interior slow cooling；When the thickness G T.GT.GT 90mm of rectangle steel, directly slow cooling in hole is hung in by driving.
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| CN201611206243.6A CN106670230B (en) | 2016-12-23 | 2016-12-23 | Cogging, tandem rolling and the cold big specification rectangle steel production technology being combined of control |
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| CN106670230B CN106670230B (en) | 2018-06-19 |
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| 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 |
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| CN106670230B (en) | 2018-06-19 |
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Effective date of registration: 20181229 Address after: 223002 No. 188 Xi'an South Road, Qingpu District, Huaian City, Jiangsu Province Co-patentee after: Jiangsu Shagang Group Huaigang Special Steel Co.,Ltd. Patentee after: Jiangsu Lihuai Iron and Steel Co., Ltd. Address before: No. 53, Qingpu Chemical Road, Huaian, Jiangsu Province Patentee before: Jiangsu Shagang Group Huaigang Special Steel Co.,Ltd. |