CN106345806B - A kind of three-slitting rolling method of φ 14mm reinforcing bar - Google Patents
A kind of three-slitting rolling method of φ 14mm reinforcing bar Download PDFInfo
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- CN106345806B CN106345806B CN201610796181.2A CN201610796181A CN106345806B CN 106345806 B CN106345806 B CN 106345806B CN 201610796181 A CN201610796181 A CN 201610796181A CN 106345806 B CN106345806 B CN 106345806B
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- rolling
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- reinforcing bar
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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
- B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The present invention discloses a kind of three-slitting rolling method of φ 14mm reinforcing bar, including 18 rolling mills, 18 rolling mills are divided into roughing mills, intermediate mill and mm finishing mill unit three parts, and roughing mills have 6 milling trains, intermediate mill has 6 milling trains, mm finishing mill unit has 6 milling trains, and steel billet is successively rolled by 18 rolling mills, and the technique material shape size of 18 rolling mills optimizes adjustment.The three-slitting rolling method of φ 14mm reinforcing bar of the present invention rolls mach technique material shape size by adjusting optimization, the effectively stability of three workpiece measurements of control, reduce subsequent splitting rolling process variation, ensure finished parts size qualification, avoid waste steel, it is serious to solve the problems, such as that cutting band folds, improves finished surface quality.
Description
Technical field
The present invention relates to multi wire cutting rolling technology field more particularly to a kind of three-slitting rolling sides of φ 14mm reinforcing bar
Method.
Background technique
Splitting rolling is the effect that rolled piece is utilized to pass in the hot rolling, rolls into two or more parallel connections
Rolled piece recycles cutting equipment (roll, guide and guard, slitting wheel etc.) that rolled piece in parallel is cut into two or two or more along longitudinal direction
Monomer rolled piece, then reroll into finished steel or intermediate blank, splitting rolling can save significantly on the energy and improve milling train production
Rate is applied to steel billet, simple section profile and wire rod and part section profile, such as the production of flat-bulb steel and T steel more
On.The three line differences fluctuation of existing φ 14mm reinforcing bar three-slitting rolling is larger, and cutting folds seriously, influences stocking surface quality,
The winged steel of rolling line is frequent, and product quality and economic indicator are all very unsatisfactory.
Summary of the invention
The technical problems to be solved by the invention and the technical assignment of proposition are improved to the prior art, and one kind is provided
The three-slitting rolling method of φ 14mm reinforcing bar, the three line differences for solving φ 14mm reinforcing bar rolling traditional in current technology are unstable,
The problem of easily being formed and folded after rolling, influencing stocking surface quality.
In order to solve the above technical problems, the technical scheme is that
A kind of three-slitting rolling method of φ 14mm reinforcing bar, including 18 rolling mills, 18 rolling mills be divided into roughing mills, in roll
Unit and mm finishing mill unit three parts, and roughing mills have 6 milling trains, and intermediate mill has 6 milling trains, and mm finishing mill unit has 6 to roll
Machine, which is characterized in that steel billet is successively rolled by 18 rolling mills, according to the technique material shape ruler of 18 rolling mill of rolling sequence
It is very little to be followed successively by 113*161mm, 119*120mm, 88*133mm, 99*98mm, 64*113mm, 80*78mm, 52*90mm, 64*
63mm, 42*75mm, 51*49mm, 32*61mm, 40.5*39.5mm, 20.5*50.4mm, 46.5*21.8mm, 18.2*54mm,
17.1*56.5mm 9.5*23mm, φ 13.4mm.The three-slitting rolling method adjusting and optimizing of φ 14mm reinforcing bar of the present invention
Mach technique material shape size is rolled, to solve the problems, such as that the folding of cutting band is serious, three lines difference is unstable, is rolled carrying out cutting
When processed, the thickness of rectangular bloom, width equidimension can all influence the size of splitting rolling part, especially in roll the size of charging, if
Its size and thickness are unstable, then will affect the stability of three workpiece measurements in finished product, so that subsequent splitting rolling process wave
Dynamic property is very big, causes finished parts off-dimension, steel is wasted, so the size of honest material shape is controlled, to improve rolled piece
Performance ensures rolled piece quality.
Further, the ingredient of the steel billet includes 0.19~0.25%C, 0.35~0.45% according to weight percent
Si, 1.10~1.20%Mn ,≤0.045%P ,≤0.045%S can be reduced compared to the content that traditional steel billet reduces Mn
Cost, adjusts the ingredient of steel billet, to improve the mechanical property of rolling rolling stock, the yield strength of rolled piece, strong flexor ratio is expired
Sufficient application demand.
Further, the 16th frame in the milling train is slitting pass milling train, and the slitting wheel roll gap of slitting pass is
1.6~2.5mm, original slitting wheel roll gap are zero clearance, and being easy to appear folding situation influences stocking surface quality, and the application will
Slitting wheel roll gap, which reserves certain gap width, can effectively improve finished appearance folding, and control middle line finished product folds.
Further, the slitting wheel roll gap of the slitting pass is 1.6mm.
Further, the middle line width of the slitting wheel is 19.2mm, and original slitting wheel middle line hole size is less than normal,
Cutting tearing band is split wheel processing, and cutting band is caused not press in lower process, forms finished product and folds.
Further, the finish to gauge speed of the mm finishing mill unit is 12~12.5m/s, and precise rolling control speed avoids
Excessive velocities cause rolled piece surface quality and structural strength to go wrong.
Further, the rolled piece that the mm finishing mill unit completes the process carries out Water cooling processing, can obtain tempering Soxhlet
Body, to improve the intensity of rolled piece, controlled rolling and control cooling can be such that the working hardening of steel and phase transformation strengthening effectively combines,
Two kinds of strengthening effects are added, and be can further improve the obdurability of steel and are obtained reasonable comprehensive mechanical property.
Further, the rolled piece tapping temperature of Water cooling processing is 1010~1100 DEG C, and wearing water flow is
410~500m3/ h, hydraulic pressure are 1.4~1.6MPa, and tempering temperature is 640~695 DEG C, when Water cooling rolled piece surface layer temperature drop compared with
Fastly, and center portion cooling effect is poor, need to control to wear water flow the cooling velocity of center portion is met and control the requirement of cold technique.Rolled piece
Skin temperature acute variation during wearing water, when high temperature bar Water cooling, strong heat exchange is equivalent to quenching for steel
Fire is cooling, and bar surface layer is made to be cooled fast to 300 DEG C~400 DEG C.It hereafter is to avoid the too low influence material property of skin temperature
And the air-cooled of progress is risen again, and transmits the heat inside bar gradually outward, skin temperature is gradually gone up, and drawing effect is played.
Compared with prior art, the invention has the advantages that:
The three-slitting rolling method adjusting and optimizing of φ 14mm reinforcing bar of the present invention rolls mach technique material shape size,
The effectively stability of three workpiece measurements of control, reduces subsequent splitting rolling process variation, ensures finished parts size qualification, keeps away
Exempt to waste steel, it is serious to solve the problems, such as that cutting band folds, improve finished surface quality, improves production efficiency, production process control
System is stablized, and production target is excellent, and product quality reaches standard requirements.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
A kind of three-slitting rolling method of φ 14mm reinforcing bar disclosed by the embodiments of the present invention, optimizes and revises and rolls mach work
Skill material shape size adjusts slitting wheel roll gap and middle line width, eliminates middle line and folds, improves finished surface quality, and extending pass makes
With the service life, it is poor to stablize three lines, effectively controls rolling line and flies steel, reduce production line roll it is useless.
A kind of three-slitting rolling method of φ 14mm reinforcing bar, including 18 rolling mills, 18 rolling mills be divided into roughing mills, in roll
Unit and mm finishing mill unit three parts, and roughing mills have 6 milling trains, and intermediate mill has 6 milling trains, and mm finishing mill unit has 6 to roll
Machine, which is characterized in that steel billet is successively rolled by 18 rolling mills, and adjusting and optimizing rolls mach technique material shape size,
To solve the problems, such as that the folding of cutting band is serious, three lines difference is unstable, specific technique material shape size is as shown in table 1.Wherein,
The pass of 13 rolling mills to the 18th rolling mill is followed successively by flat-rolled hole, edging pass for rolling, pre- cutting hole, cutting hole, elliptical aperture and finished hole,
The slitting wheel roll gap of cutting hole is adjusted, the gap width for having certain, gap width setting are changed to by original zero clearance
For 1.6~2.5mm, when being adjusted to 2.5mm, finished appearance fold be improved significantly, middle line finished product, which folds, to be controlled, warp
Quality testing clod wash sample, does not crack；Or processing improvement is carried out to the middle line width dimensions of slitting wheel, by original 17.8mm
Be changed to 19.2mm, roll gap is adjusted to 1.6mm, can effectively stable workpiece measurement, improve appearance fold situation.
Table 1
In order to guarantee the mechanical property of rolled piece, the composition adjustment of steel billet is as shown in table 2, and 0.05% is reduced in original basis
Mn can reduce cost, while ensure that the yield strength of rolled piece and strong flexor ratio meet application demand.
Table 2
The rolled piece that mm finishing mill unit completes the process carries out Water cooling processing, tempered sorbite can be obtained, to improve rolled piece
Intensity, controlled rolling and control cooling the working hardening of steel and phase transformation strengthening can be made effectively to combine, two kinds of strengthening effect phases
Add, can further improve the obdurability of steel and obtains reasonable comprehensive mechanical property.The application is always supplied using same root simultaneously
Water pipe, which is divided into the pipeline that three tunnel waters are matched, which carries out Water cooling to three line rolled pieces respectively, improves the stability of the three line temperature difference, simultaneously
Keep the adjustment of the three line temperature difference also relatively easy, mechanical property decreases with the upper fluctuating range of batch difference, specific Water cooling
Control parameter is as shown in table 3.
Table 3
162 batches (3269.53 tons), antidetonation ratio are produced altogether according to the three-slitting rolling method of above-mentioned φ 14mm reinforcing bar
98.3%, non-shock resisting steel 3 batches (54.74 tons)；P >'s 0.04% has 29 batches, wherein 1 batch of non-antidetonation (27.778 tons), accounts for
0.84%；S >'s 0.04% has 1 batch；Mn <'s 1.1% has 8 batches；C <'s 0.19% has 3 batches；Have 26 with crowd difference > 20MPa
Batch (499.012 tons) account for 15.26%, wherein reaching 39MPa with batch with the biggest gap, performance parameter is as shown in table 4, and three lines are poor, three
Line temperature difference and rolling line fly steel and are effectively controlled, and the operation of rolling is more stable, and product appearance quality is preferable, solves cutting middle line
Fold, the problem of cold bed steel disturbs on finished product, split run maximum output up to 827 tons, lumber recovery 97.24%, sizing ratio 99.16%,
Minus tolerance qualification rate 100%.November, antidetonation ratio was up to 100%.
Table 4
The above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
Limitation of the invention, protection scope of the present invention should be defined by the scope defined by the claims..For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change
It also should be regarded as protection scope of the present invention into retouching.
Claims (5)
1. a kind of three-slitting rolling method of φ 14mm reinforcing bar, including 18 rolling mills, 18 rolling mills are divided into roughing mills, middle milling train
Group and mm finishing mill unit three parts, and roughing mills have 6 milling trains, and intermediate mill has 6 milling trains, and mm finishing mill unit has 6 milling trains,
It is characterized in that, steel billet is successively rolled by 18 rolling mills, according to the technique material shape size of 18 rolling mill of rolling sequence
It is followed successively by 113*161mm, 119*120mm, 88*133mm, 99*98mm, 64*113mm, 80*78mm, 52*90mm, 64*63mm,
42*75mm, 51*49mm, 32*61mm, 40.5*39.5mm, 20.5*50.4mm, 46.5*21.8mm, 18.2*54mm, 17.1*
56.5mm, 9.5*23mm, φ 13.4mm, the 16th frame in the milling train are slitting pass milling train, the slitting pass
Slitting wheel roll gap is 1.6mm, and the middle line width of the slitting wheel is 19.2mm.
2. the three-slitting rolling method of φ 14mm reinforcing bar according to claim 1, which is characterized in that the steel billet at
Point according to weight percent include 0.19~0.25%C, 0.35~0.45%Si, 1.10~1.20%Mn ,≤0.045%P ,≤
0.045%S.
3. the three-slitting rolling method of φ 14mm reinforcing bar according to claim 1, which is characterized in that the mm finishing mill unit
Finish to gauge speed be 12~12.5m/s.
4. the three-slitting rolling method of φ 14mm reinforcing bar according to claim 1, which is characterized in that the mm finishing mill unit
The rolled piece completed the process carries out Water cooling processing.
5. the three-slitting rolling method of φ 14mm reinforcing bar according to claim 4, which is characterized in that the Water cooling
The rolled piece tapping temperature of processing is 1010~1100 DEG C, and wearing water flow is 410~500m3/ h, hydraulic pressure are 1.4~1.6MPa, are returned
Fiery temperature is 640~695 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610796181.2A CN106345806B (en) | 2016-08-31 | 2016-08-31 | A kind of three-slitting rolling method of φ 14mm reinforcing bar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610796181.2A CN106345806B (en) | 2016-08-31 | 2016-08-31 | A kind of three-slitting rolling method of φ 14mm reinforcing bar |
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| Publication Number | Publication Date |
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| CN106345806A CN106345806A (en) | 2017-01-25 |
| CN106345806B true CN106345806B (en) | 2019-01-01 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112139239B (en) * | 2020-08-11 | 2023-04-14 | 柳州钢铁股份有限公司 | Split reinforcing steel bar with small performance line difference |
| CN112676345B (en) * | 2021-01-21 | 2022-04-12 | 广东韶钢松山股份有限公司 | Processing method of hot-rolled ribbed steel bar |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275197A (en) * | 2007-07-19 | 2008-10-01 | 天津钢铁有限公司 | High-strength rebar and manufacturing process thereof |
| CN102873089A (en) * | 2012-10-09 | 2013-01-16 | 四川省川威集团有限公司 | System for producing ribbed bar by quartered hot rolling production line |
| CN103042029A (en) * | 2013-01-07 | 2013-04-17 | 河北钢铁股份有限公司唐山分公司 | Phi22mm ribbed twisted steel slit rolling method |
| CN105057348A (en) * | 2015-08-03 | 2015-11-18 | 四川省川威集团有限公司 | Method for producing ribbed reinforcing bars of phi 25mm by adopting two-slitting rolling |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3330292B2 (en) * | 1996-12-03 | 2002-09-30 | 三興製鋼株式会社 | Guide device for multi-slit rolling mill |
| JPH11300401A (en) * | 1998-04-17 | 1999-11-02 | Kobe Steel Ltd | Method for slitting/rolling multi-bar and device therefor |
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- 2016-08-31 CN CN201610796181.2A patent/CN106345806B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275197A (en) * | 2007-07-19 | 2008-10-01 | 天津钢铁有限公司 | High-strength rebar and manufacturing process thereof |
| CN102873089A (en) * | 2012-10-09 | 2013-01-16 | 四川省川威集团有限公司 | System for producing ribbed bar by quartered hot rolling production line |
| CN103042029A (en) * | 2013-01-07 | 2013-04-17 | 河北钢铁股份有限公司唐山分公司 | Phi22mm ribbed twisted steel slit rolling method |
| CN105057348A (en) * | 2015-08-03 | 2015-11-18 | 四川省川威集团有限公司 | Method for producing ribbed reinforcing bars of phi 25mm by adopting two-slitting rolling |
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