CN106345806A - Three-strand splitting rolling method for rebars with diameter phi of 14 mm - Google Patents
Three-strand splitting rolling method for rebars with diameter phi of 14 mm Download PDFInfo
- Publication number
- CN106345806A CN106345806A CN201610796181.2A CN201610796181A CN106345806A CN 106345806 A CN106345806 A CN 106345806A CN 201610796181 A CN201610796181 A CN 201610796181A CN 106345806 A CN106345806 A CN 106345806A
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- CN
- China
- Prior art keywords
- slitting
- rolling
- reinforcing bar
- rolling method
- mill unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B21B1/16—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
-
- 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
Abstract
The invention discloses a three-strand splitting rolling method for rebars with the diameter phi of 14 mm. 18 rolling mills are involved in the method. The 18 rolling mills are divided into a roughing mill unit, an intermediate mill unit and a finishing mill unit, wherein the roughing mill unit includes 6 rolling mills, the intermediate mill unit includes 6 rolling mills, and the finishing mill unit includes 6 rolling mills. Billet steel is rolled by the 18 rolling mills in sequence, and optimal adjustment is carried out on the technological material shape and size of the 18 rolling mills. According to the three-strand splitting rolling method for the rebars with the diameter phi of 14 mm, the size stability of three rolled pieces is effectively controlled by adjusting and optimizing the technological material shape and size in rolling mill machining, fluctuation of the follow-up splitting rolling process is reduced, it is ensured that the size of finished products is qualified, steel waste is avoided, the problem that split strips are seriously folded is solved, and the surface quality of the finished products is improved.
Description
Technical field
The present invention relates to multi wire cutting rolling technology field, more particularly, to a kind of three-slitting rolling side of φ 14mm reinforcing bar
Method.
Background technology
Splitting rolling, is the effect that rolled piece utilizes 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 more than two along longitudinal
Monomer rolled piece, then reroll into finished steel or middle blank, splitting rolling can save significantly on the energy and improve milling train and produce
Rate, is applied to steel billet, simple section section bar and wire rod and part section section bar more, such as the production of flat-bulb steel and t word steel
On.Three line difference fluctuations of existing φ 14mm reinforcing bar three-slitting rolling are larger, and cutting folds serious, impact stocking surface quality,
Rolling line flies steel frequently, and product quality and economic indicator are all very undesirable.
Content of the invention
The technical problem to be solved and the technical assignment proposing are that prior art is improved, and provide one kind
The three-slitting rolling method of φ 14mm reinforcing bar, the three line differences solving traditional φ 14mm reinforcing bar rolling in current technology are unstable,
Easily formed after rolling and fold, the problem of impact stocking surface quality.
For solving above technical problem, 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 part, and roughing mills have 6 milling trains, and intermediate mill has 6 milling trains, and mm finishing mill unit has 6 to roll
Machine it is characterised in that steel billet rolls successively through 18 described rolling mills, according to the technique material shape chi of rolling sequence 18 rolling mill
Very little 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 three-slitting rolling method adjusting and optimizing of φ 14mm reinforcing bar of the present invention
Roll mach technique material shape size, thus it is unstable to solve the problems, such as that cutting band folds serious, three lines differences, roll carrying out cutting
When processed, the thickness of rectangular bloom, width equidimension all can affect the size of splitting rolling part, particularly in roll the size of charging, if
Its size and thickness are unstable, then can affect the stability of three workpiece measurements in finished product so that follow-up splitting rolling process ripple
Dynamic property is very big, causes finished parts off-dimension, wastes steel, so the size of honest material shape will be controlled, thus improving rolled piece
Performance, ensures rolled piece quality.
Further, the composition of described steel billet according to percentage by weight include 0.19～0.25%c, 0.35～0.45%
Si, 1.10～1.20%mn ,≤0.045%p ,≤0.045%s, compare the content that traditional steel billet reduces mn, it is possible to decrease become
This, the composition of adjustment steel billet, thus improve the mechanical property of rolling rolling stock so that the yield strength of rolled piece, strong flexor ratio can meet
Application demand.
Further, the 16th frame in described 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 is zero clearance, folding situation impact stocking surface quality easily, and the application will cut
Minute wheel roll gap is reserved certain gap width and can be effectively improved finished appearance folding, controls center line finished product to fold.
Further, the slitting wheel roll gap of described slitting pass is 1.6mm.
Further, the middle line width of described slitting wheel is 19.2mm, and original slitting wheel center line hole size is less than normal,
Cutting tear-strap is split wheel processing, causes cutting band not press in lower operation, forms finished product and folds.
Further, the finish to gauge speed of described mm finishing mill unit is 12～12.5m/s, precise rolling control speed, it is to avoid
Excessive velocities lead to rolled piece surface quality and structural strength to go wrong.
Further, the rolled piece that described mm finishing mill unit machines carries out Water cooling process, can obtain being tempered Soxhlet
Body, thus improving the intensity of rolled piece, controlled rolling and control cooling can make the working hardening of steel and phase transformation strengthening effectively combine,
Two kinds of strengthening effects are added, and can further improve the obdurability of steel and obtain rational comprehensive mechanical property.
Further, the rolled piece tapping temperature that described Water cooling is processed is 1010～1100 DEG C, and wearing discharge is 410
～500m3/ h, hydraulic pressure is 1.4～1.6mpa, and temperature is 640～695 DEG C, and during Water cooling, rolled piece top layer temperature drop is very fast,
And center portion cooling effect is poor, needs to control and wear the rate of cooling satisfaction cold technological requirement of control that discharge makes center portion.Rolled piece exists
Wear skin temperature acute variation during water, when high temperature bar Water cooling, strong heat exchange is equivalent to the quenching of steel
Cooling, makes bar top layer be cooled fast to 300 DEG C～400 DEG C.Hereafter be for avoid skin temperature too low impact material property and
The air cooling carrying out is risen again, and so that the heat within bar is gradually outwards transmitted, skin temperature is gradually gone up, and plays drawing effect.
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 stability of three workpiece measurements of effective control, reduces follow-up splitting rolling process variation, ensures finished parts size qualification, keeps away
Exempt to waste steel, solve the problems, such as that cutting band folds serious, improve finished surface quality, improve production efficiency, production process control
System is stable, and production target is excellent, and product quality reaches standard and requires.
Specific embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of not making creative work, all
Belong to the scope of protection of the invention.
Disclosed in the embodiment of the present invention, a kind of three-slitting rolling method of φ 14mm reinforcing bar, optimizes and revises and rolls mach work
Skill material shape size, adjustment slitting wheel roll gap and middle line width, eliminate center line and fold, improve finished surface quality, and extending pass makes
With the life-span, stablize that three lines are poor, effective control rolling line flies steel, reduce production line roll 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 part, and roughing mills have 6 milling trains, and intermediate mill has 6 milling trains, and mm finishing mill unit has 6 to roll
It is characterised in that steel billet rolls successively through 18 described rolling mills, adjusting and optimizing rolls mach technique material shape size to machine,
Thus solving the problems, such as that cutting band folds that serious, three lines differences are 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, is changed to that there is certain gap width by original zero clearance, gap width is set
For 1.6～2.5mm, when being adjusted to 2.5mm, finished appearance fold be improved significantly, center line finished product folds and is controlled, warp
Quality testing clod wash sample, does not crack；Or the middle line width dimensions of slitting wheel are processed improving, by original 17.8mm
It is changed to 19.2mm, roll gap regulation, to 1.6mm, effectively can stablize workpiece measurement, improve outward appearance and fold situation.
Table 1
In order to ensure the mechanical property of rolled piece, the composition adjustment of steel billet as shown in table 2, reduces by 0.05% in original basis
Mn, it is possible to decrease cost, guarantees that the yield strength of rolled piece and strong flexor ratio meet application demand simultaneously.
Table 2
The rolled piece that mm finishing mill unit machines carries out Water cooling process, can obtain tempered sorbite, thus improving 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 strengthening effect phases
Plus, can further improve the obdurability of steel and obtain rational comprehensive mechanical property.The application uses same total confession simultaneously
Water pipe is divided into the pipeline that the three tunnel water yields all join and respectively three line rolled pieces is carried out with the stability that Water cooling improves the three line temperature difference, simultaneously
Make the adjustment of the three line temperature difference also relatively easy, mechanical property is decreasing with fluctuating margin in batch difference, specific Water cooling
Control parameter is as shown in table 3.
Table 3
Three-slitting rolling method according to above-mentioned φ 14mm reinforcing bar produces 162 batches (3269.53 tons), antidetonation ratio altogether
98.3%, non-shock resisting steel 3 batches (54.74 tons)；P ＞ 0.04% has 29 batches, wherein 1 batch non-antidetonation (27.778 tons), accounts for
0.84%；S ＞ 0.04% has 1 batch；Mn ＜ 1.1% has 8 batches；C ＜ 0.19% has 3 batches；Same crowd of difference ＞ 20mpa has 26
Batch (499.012 tons) account for 15.26%, wherein reach 39mpa with batch with the biggest gap, and as shown in table 4, three lines are poor, three for performance parameter
Line temperature difference and rolling line fly steel and are effectively controlled, and the operation of rolling is more stable, and product appearance quality preferably, solves cutting center line
Fold, cold bed steel disturbs on finished product problem, split run maximum output reach 827 tons, lumber recovery 97.24%, sizing ratio 99.16%,
Minus tolerance qualification rate 100%.November antidetonation ratio reaches 100%.
The above is only the preferred embodiment of the present invention it is noted that above-mentioned preferred implementation be not construed as right
The restriction of the present invention, protection scope of the present invention should be defined by claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, these change
Enter and retouch also to should be regarded as protection scope of the present invention.
Claims (8)
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 part, 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 rolls successively through 18 described rolling mills, according to the technique material shape size of rolling sequence 18 rolling mill
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.
2. the three-slitting rolling method of φ 14mm reinforcing bar according to claim 1 is it is characterised in that the one-tenth of described steel billet
Point according to percentage by weight 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 is it is characterised in that in described milling train
16th frame is slitting pass milling train, and the slitting wheel roll gap of slitting pass is 1.6～2.5mm.
4. the three-slitting rolling method of φ 14mm reinforcing bar according to claim 3 is it is characterised in that described slitting pass
Slitting wheel roll gap be 1.6mm.
5. the three-slitting rolling method of φ 14mm reinforcing bar according to claim 4 is it is characterised in that described slitting wheel
Middle line width is 19.2mm.
6. the three-slitting rolling method of φ 14mm reinforcing bar according to claim 1 is it is characterised in that described mm finishing mill unit
Finish to gauge speed be 12～12.5m/s.
7. the three-slitting rolling method of φ 14mm reinforcing bar according to claim 1 is it is characterised in that described mm finishing mill unit
The rolled piece machining carries out Water cooling process.
8. the three-slitting rolling method of φ 14mm reinforcing bar according to claim 7 is it is characterised in that described Water cooling
The rolled piece tapping temperature processing is 1010～1100 DEG C, and wearing discharge is 410～500m3/ h, hydraulic pressure is 1.4～1.6mpa, returns
Fiery temperature is 640～695 DEG C.
Priority Applications (1)
| 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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| CN106345806A true CN106345806A (en) | 2017-01-25 |
| CN106345806B CN106345806B (en) | 2019-01-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112139239A (en) * | 2020-08-11 | 2020-12-29 | 柳州钢铁股份有限公司 | Split reinforcing steel bar with small performance line difference |
| CN112676345A (en) * | 2021-01-21 | 2021-04-20 | 广东韶钢松山股份有限公司 | Processing method of hot-rolled ribbed steel bar |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112139239A (en) * | 2020-08-11 | 2020-12-29 | 柳州钢铁股份有限公司 | Split reinforcing steel bar with small performance line difference |
| CN112676345A (en) * | 2021-01-21 | 2021-04-20 | 广东韶钢松山股份有限公司 | Processing method of hot-rolled ribbed steel bar |
| 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 |
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