CN210474987U - High-strength deformed steel bar rolling system - Google Patents
High-strength deformed steel bar rolling system Download PDFInfo
- Publication number
- CN210474987U CN210474987U CN201920212061.2U CN201920212061U CN210474987U CN 210474987 U CN210474987 U CN 210474987U CN 201920212061 U CN201920212061 U CN 201920212061U CN 210474987 U CN210474987 U CN 210474987U
- Authority
- CN
- China
- Prior art keywords
- section
- water cooling
- rolling
- finishing
- finish rolling
- 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.)
- Active
Links
Images
Landscapes
- Metal Rolling (AREA)
Abstract
The utility model relates to a high-strength deformed steel bar rolling system, including roughing mill group, well rolling mill group, finishing mill group and finished product multiple length flying shear, the finishing mill group has arranged first water cooling section and first section of replying along the rolled piece traffic direction in proper order between preceding finishing section and the back finishing section including preceding finishing section and back finishing section, has arranged second water cooling section and second section of replying along the rolled piece traffic direction in proper order between back finishing section and the finished product multiple length flying shear. By arranging the finishing mill groups in sections and uniformly arranging the water cooling sections and the recovery sections in front of and behind the post finishing rolling section, the low-temperature finishing rolling and post-rolling controlled cooling process can be realized on the post finishing rolling section, the alloy elements can be reduced, the condition that the hot rolled steel bar does not generate tempered martensite and other closed tissues different from ferrite and pearlite after controlled cooling or other tissues without closed loops appear at the edge part of the base circle can be ensured, the difference between the hardness of the core part and the surface is not more than 40HV, and the product meets the new national standard requirements on the aspects of tissue structure and performance.
Description
Technical Field
The utility model belongs to the technical field of the screw-thread steel production, concretely relates to high-strength screw-thread steel rolling system.
Background
With the implementation of the new national standard (GB1499.2-2018) of hot-rolled twisted steel bars, the production process of the hot-rolled steel bars is standardized from the industrial standard, the water penetration steel bars are prevented from replacing the hot-rolled steel bars to circulate in the market, and the new national standard effectively inhibits the method for improving the strength of steel by adopting the 'strong water penetration' process in the production process of the hot-rolled ribbed steel bars.
In response to the production of new national standard twisted steel, the conventional method adopts alloying, but the problem of increased production cost is caused. Therefore, it is necessary to provide a technical scheme for producing hot-rolled twisted steel bars meeting the requirements of new national standards while reducing alloy elements.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a high-strength deformed steel bar rolling system can solve prior art's partial defect at least.
The embodiment of the utility model relates to a high-strength deformed steel bar rolling system, including roughing mill group, well rolling mill group, finishing mill group and finished product multiple length flying shear, finishing mill group includes preceding finish rolling section and back finish rolling section, preceding finish rolling section with first water cooling section and first return section have been arranged in proper order along the rolled piece traffic direction between the back finish rolling section, back finish rolling section with second water cooling section and second return section have been arranged in proper order along the rolled piece traffic direction between the finished product multiple length flying shear.
As an example, the front finishing section comprises 4 rolling mills and the rear finishing section comprises 2 rolling mills.
In one embodiment, the first water cooling section and the second water cooling section respectively comprise 2-3 groups of water cooling devices which are sequentially arranged at intervals along the running direction of a rolled piece.
As an embodiment, the cooling length of each group of water cooling devices is 4-6 m.
In one embodiment, the number of the water cooling devices in the first water cooling section is the same as that in the second water cooling section.
In one embodiment, the distance between the end of the first water-cooling section and the first rolling mill of the post finishing rolling section is 30m or more.
In one embodiment, the distance between the front finish rolling section and the rear finish rolling section is 75-85 m.
As an embodiment, the distance between the post finish rolling section and the finished product double-length flying shear is 46-55 m.
In one embodiment, a roll flying shear is arranged between the first water cooling section and the rear finish rolling section.
In one embodiment, a cooling bed is arranged on one side of the finished product multi-length flying shear far away from the rear finish rolling section.
The embodiment of the utility model provides a following beneficial effect has at least:
the utility model provides a high strength deformed steel bar rolling system, through arranging the finishing mill group segmentation, and evenly set up water cooling section and reply the section around the back finish rolling section, can realize low temperature finish rolling and the controlled cooling technology after rolling on the back finish rolling section, under the prerequisite of guaranteeing deformed steel bar performance, can reduce alloy element, can guarantee again that the controlled cooling back base circle of hot rolling reinforcing bar does not produce the tempering martensite and other confined organizations that are different from "ferrite + pearlite"; or other structures which are not closed-loop at the base circular edge part are formed, and the difference between the hardness of the core part and the surface is ensured to be not more than 40 HV. Therefore, the high-strength deformed steel bar rolling system can enable the product to meet the requirements of new national standards (GB1499.2-2018) in terms of organization structure and performance under the condition of adding few or even no alloy elements, reduces the production cost and improves the market competitiveness.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high-strength deformed steel bar rolling system provided by an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
According to fig. 1, the embodiment of the utility model provides a high-strength deformed steel bar rolling system, including roughing mill group (not shown), well rolling mill group (not shown), finishing mill group and finished product multiple length flying shear 8, finishing mill group includes preceding finish rolling section 1 and back finish rolling section 2, preceding finish rolling section 1 with first water cooling section 3 and first answer section 4 have been arranged in proper order along the rolled piece traffic direction between the back finish rolling section 2, back finish rolling section 2 with second water cooling section 6 and second answer section 7 have been arranged in proper order along the rolled piece traffic direction between the finished product multiple length flying shear 8. As shown in FIG. 1, the first water cooling section 3 and the second water cooling section 6 both preferably comprise 2-3 groups of water cooling devices 100 which are sequentially arranged at intervals along the running direction of a rolled piece.
According to the high-strength deformed steel bar rolling system provided by the embodiment, the finishing mill group is arranged in sections, and the water cooling sections and the recovery sections are uniformly arranged at the front and the back of the post-finishing rolling section 2, so that the low-temperature finishing rolling and post-rolling controlled cooling process can be realized on the post-finishing rolling section 2, and on the premise of ensuring the performance of the deformed steel bar, not only can alloy elements be reduced, but also the condition that tempered martensite and other closed structures different from ferrite and pearlite are not generated on the base circle after controlled cooling of the hot-rolled steel bar can be ensured; or other structures which are not closed-loop at the base circular edge part are formed, and the difference between the hardness of the core part and the surface is ensured to be not more than 40 HV. Therefore, the high-strength deformed steel bar rolling system can enable the product to meet the requirements of new national standards (GB1499.2-2018) in terms of organization structure and performance under the condition of adding few or even no alloy elements, reduces the production cost and improves the market competitiveness.
Preferably, the front finish rolling section 1 comprises 4 rolling mills, the rear finish rolling section 2 comprises 2 rolling mills, the front finish rolling section 1 can realize pre-finish rolling on the rolled piece, the rear finish rolling section 2 realizes low-temperature finish rolling on the rolled piece, and the distribution of the number of the rolling mills can well complete the distribution of the rolling force and the reduction ratio on the threaded steel rolled piece. Further, for two times of rolling by two rolling mills in the post finish rolling section 2, the rolling reduction rate is preferably controlled to be 25-30%, and the finish rolling effect is ensured.
As described above, the high-strength deformed steel bar rolling system can realize the low-temperature finish rolling and the post-rolling controlled cooling process in the post-finish rolling section 2, specifically:
the front finish rolling section 1 can realize the pre-finish rolling of the rolled piece, the temperature of the rolled piece is reduced to about 780-850 ℃ through the first water cooling section 3 and the first recovery section 4, and the rolled piece enters the rear finish rolling section 2 to realize the low-temperature finish rolling; the rolling mill enters a second water cooling section 6 for water cooling immediately after being rolled by a post-finishing rolling section 2 (the temperature is 850-880 ℃), and the cooling is carried out quickly to a phase transformation area 580-700 ℃, so as to control the growth of austenite grains and ferrite grains. After the rolled piece is quenched by the water cooling section, the heat of the core part of the rolled piece can be gradually conducted to the surface of the rolled piece in the recovery section, so that the temperature of the rolled piece is as uniform as possible.
Further optimize above-mentioned screw-thread steel rolling system that excels in, to above-mentioned first water-cooling section 3 and first section 4 of resumeing, adopt following preferred arrangement structure:
(1) the distance between the tail end of the first water cooling section 3 and the first rolling mill of the post finish rolling section 2 is more than 30m, namely the length of the first recovery section 4 is more than 30m, so as to ensure the temperature recovery of the rolled piece after water cooling of the first water cooling section 3, and the rolled piece enters the post finish rolling section 2 at about 780-850 ℃.
(2) The distance between the front finish rolling section 1 and the rear finish rolling section 2 is 75-85 m, preferably about 80 m.
(3) The cooling length of each set of water cooling device 100 is 4-6 m, preferably 5 m. In the present embodiment, the water cooling apparatus 100 is configured as the water cooling tank 100, and the length of the water cooling tank 100 is about 5 m. The distance between the adjacent water cooling apparatuses 100 can be known from the parameters such as the distance between the front and rear finish rolling sections and the length of the first recovery section 4, and in this embodiment, the distance between the adjacent water cooling apparatuses 100 is approximately in the range of 6 to 8 m. In the embodiment, as shown in fig. 1, the first water cooling section 3 comprises 3 groups of water cooling devices 100, and can meet the control requirement on the temperature of the rolled piece before the post-finishing rolling section 2.
Further optimizing the high-strength deformed steel bar rolling system, and adopting the following preferable arrangement structure for the second water cooling section 6 and the second recovery section 7:
(1) the cooling length of each set of water cooling device 100 is 4-6 m, preferably 5 m. In the present embodiment, the water cooling apparatuses 100 are configured as water cooling boxes, and the length of the water cooling boxes 100 is about 5m, and the distance between adjacent water cooling apparatuses 100 is approximately in the range of 6 to 8 m. In this embodiment, as shown in fig. 1, the second water cooling section 6 includes 3 groups of water cooling devices 100, which can meet the control requirement of controlled cooling after rolling.
(2) The distance between the rear finish rolling section 2 and the finished product double-length flying shear 8 is 46-55 m, namely the length of the second water cooling section 6 and the second recovery section 7 is 46-55 m later, preferably about 50m later.
Through the arrangement of the first water cooling section 3, the second water cooling section 6, the first recovery section 4 and the second recovery section 7, the purpose of realizing the low-temperature finish rolling and post-rolling controlled cooling process on the post-finish rolling section 2 can be achieved, and the hot rolling production of the high-strength deformed steel bar can be well completed.
Further preferably, each water cooling device 100/water cooling tank 100 can form temperature, flow and pressure curves during the water cooling process of the rolled piece, has closed-loop control and review functions, can realize the combined use of any number of water cooling devices 100, and realizes a flexible graded cooling process. As shown in FIG. 1, the water cooling devices 100 of the first water cooling section 3 and the second water cooling section 6 are preferably the same in number, so that the requirement on the temperature control of rolled pieces is ensured.
The high-strength deformed steel bar rolling system is further optimized, as shown in fig. 1, the system further comprises a cooling bed 9, the cooling bed 9 is arranged behind the finished product multiple length flying shears 8, namely the cooling bed 9 is arranged on one side, far away from the rear finish rolling section 2, of the finished product multiple length flying shears 8. After the finished product is segmented, the finished product is put on a cooling bed 9 to continuously complete the phase change process, and preferably, the recovery temperature of the cooling bed 9 is 700-730 ℃.
The high-strength deformed steel bar rolling system is further optimized, as shown in fig. 1, a roll room flying shear 5 is arranged between the first water cooling section 3 and the rear finish rolling section 2, head and tail shearing or segmentation can be carried out on rolled pieces, the production requirement of high-strength deformed steel bars is met, and the deformed steel bars can be rolled in the rear finish rolling section 2 better.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides a high-strength deformed steel bar rolling system, includes roughing mill group, well rolling mill group, finishing mill group and finished product multiple length flying shear, its characterized in that: the finishing mill group comprises a front finishing rolling section and a rear finishing rolling section, wherein the front finishing rolling section comprises 4 rolling mills, and the rear finishing rolling section comprises 2 rolling mills;
a first water cooling section and a first recovery section are sequentially arranged between the front finish rolling section and the rear finish rolling section along the running direction of a rolled piece, the distance between the front finish rolling section and the rear finish rolling section is 75-85 m, the length of the first recovery section is more than 30m, the first water cooling section comprises 2-3 groups of water cooling devices which are sequentially arranged along the running direction of the rolled piece at intervals, the cooling length of each group of water cooling devices is 4-6 m, and the distance between adjacent water cooling devices 100 is within the range of 6-8 m;
the back finish rolling section with second water cooling section and second reply section have been arranged in proper order along the rolled piece traffic direction between the finished product multiple length flying shear, back finish rolling section with distance between the finished product multiple length flying shear is 46 ~ 55m, the second water cooling section all includes 2 ~ 3 water cooling plant that set up along the rolled piece traffic direction at interval in proper order, every group water cooling plant's cooling length is 4 ~ 6m, and the interval between the adjacent water cooling plant 100 is in the 6 ~ 8m within range.
2. The high strength deformed steel bar rolling system of claim 1, wherein: the number of the water cooling devices of the first water cooling section is the same as that of the water cooling devices of the second water cooling section.
3. The high strength deformed steel bar rolling system of claim 1, wherein: and a roll flying shear is arranged between the first water cooling section and the rear finish rolling section.
4. The high strength deformed steel bar rolling system of claim 1, wherein: and a cooling bed is arranged on one side of the finished product multi-length flying shear, which is far away from the rear finish rolling section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920212061.2U CN210474987U (en) | 2019-02-19 | 2019-02-19 | High-strength deformed steel bar rolling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920212061.2U CN210474987U (en) | 2019-02-19 | 2019-02-19 | High-strength deformed steel bar rolling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210474987U true CN210474987U (en) | 2020-05-08 |
Family
ID=70485193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920212061.2U Active CN210474987U (en) | 2019-02-19 | 2019-02-19 | High-strength deformed steel bar rolling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210474987U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112872039A (en) * | 2020-12-28 | 2021-06-01 | 江苏省镔鑫钢铁集团有限公司 | Alloy for improving strength of deformed steel bar and manufacturing method and manufacturing device thereof |
| CN114074116A (en) * | 2020-08-13 | 2022-02-22 | 北京京诚瑞信长材工程技术有限公司 | Hot rolling reinforcing bar rod accuse rolling accuse cold production line |
-
2019
- 2019-02-19 CN CN201920212061.2U patent/CN210474987U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114074116A (en) * | 2020-08-13 | 2022-02-22 | 北京京诚瑞信长材工程技术有限公司 | Hot rolling reinforcing bar rod accuse rolling accuse cold production line |
| CN114074116B (en) * | 2020-08-13 | 2024-03-19 | 北京京诚瑞信长材工程技术有限公司 | Rolling and cooling control production line for hot rolled steel bar |
| CN112872039A (en) * | 2020-12-28 | 2021-06-01 | 江苏省镔鑫钢铁集团有限公司 | Alloy for improving strength of deformed steel bar and manufacturing method and manufacturing device thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105290106B (en) | A kind of Ribbed Bar bar low temperature controlled rolling cutting process and device | |
| CN106077085B (en) | A kind of production system and method for low yield strength ratio hot-rolled high-strength anti-seismic steel bar | |
| CN111360066B (en) | Low-cost, less-red-rust, high-strength and anti-seismic deformed steel bar production method and system | |
| CN111069282B (en) | High-precision multi-segmentation hot-rolled steel bar grading and controlled cooling process method | |
| CN210474987U (en) | High-strength deformed steel bar rolling system | |
| CN107185968B (en) | A kind of excellent special steel bar controlled rolling and controlled cooling method | |
| CN105665442A (en) | Coil production method and production line thereof | |
| CN205851555U (en) | A kind of production system of low yield strength ratio hot-rolled high-strength anti-seismic steel bar | |
| CN103722009A (en) | Bar continuous rolling production line | |
| CN110170523A (en) | A kind of low energy consumption controlled rolling method of hot rolled ribbed bars | |
| CN103801580B (en) | Galvanized all-hard plate cold rolling edge crack control method considering plate shape | |
| CN108246801A (en) | A kind of big specification non-hardened and tempered steel rolling equipment and its rolling production method | |
| CN113546960A (en) | Micro-alloying-free rolling and cooling control method for slitting rolling of bar deformed steel bar | |
| CN104014594A (en) | Method for overcoming post-cold-shearing lateral bending of gear steel bar | |
| CN113814281A (en) | Cost-reducing segmented cooling control method for hot-rolled ribbed steel bar | |
| CN203991658U (en) | A kind of high strength cast iron production system | |
| CN103480656B (en) | The removing method that SPHC splits on cold rolling limit | |
| CN110153199A (en) | A kind of controlled rolling method of large scale rod bar | |
| CN108796204A (en) | The production method of super special deep-draw grade steel | |
| CN103643017A (en) | Production method for improving toughness of thick steel plate with 345MPa-level yield strength | |
| CN103286147B (en) | Hot-rolled board strip production line laminar cooling method | |
| CN112090960A (en) | Method for producing 400-500 MPa high-strength anti-seismic deformed steel bar by non-heating low-temperature slitting rolling | |
| CN113355496B (en) | On-line solution annealing process for rolling waste heat of stainless steel hot-rolled coil | |
| CN205270332U (en) | Coil production line | |
| CN108971242A (en) | The controlled rolling and controlled cooling method of PSB830 fining twisted steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |