CN103639196A - Efficient energy-saving manufacturing method for building-used cold rolling twisted steel - Google Patents
Efficient energy-saving manufacturing method for building-used cold rolling twisted steel Download PDFInfo
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- CN103639196A CN103639196A CN201310731876.9A CN201310731876A CN103639196A CN 103639196 A CN103639196 A CN 103639196A CN 201310731876 A CN201310731876 A CN 201310731876A CN 103639196 A CN103639196 A CN 103639196A
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Abstract
The invention provides an efficient energy-saving manufacturing method for building-used cold rolling twisted steel, and belongs to the technical field of building-used steel. According to the invention, the bending roll diameter, the bending roll number, and the relative position of the bending roll, the driven roll and the driving roll are controlled, so that mechanical descaling, and big deformation and uniform extension during a cold rolling process are completed, overall reinforcement of the twisted steel section is realized, and residual stress after rolling is reduced; on-line low temperature treatment after rolling is performed to achieve the purpose of improving the impact flexibility of the material and maintaining the strength after cold deformation. The double-rib twisted steel obtained through the manufacturing method, provided by the invention, has tensile strength equal to or higher than 650 MPa, a fracture elongation percentage equal to or higher than 8%, and a stress relaxation rate equal to or lower than 8% under 450 Mpa over 1000 h.
Description
Technical field
The invention belongs to construction(al)steel technical field, be specifically related to the production technology of cold rolling pair of rib spiral of a kind of high-efficiency and energy-saving type Q235 steel for building.
Background technology
Along with the fast development of Chinese national economy, building had become one of larger industry of consumed resource already.According to statistics, Building Trade in China steel using amount accounts for 50% left and right of steel consumption total amount.Realize sustainable development, just must adjust construction material and consume structure, apply energetically high tensile reinforcement, walk efficient resource efficient development strategy.Country's < < steel industry adjustment and development planning > > require to give priority to high strength, high-elongation construction(al)steel, revise relevant art designs standard, accelerate to eliminate the following screw-thread steel of II level, screw-thread steel more than III level is applied in pressure, to reduce a large amount of uses of rare metal in screw-thread steel for building, the utilization rate that improves resource and the energy, realizes material-saving, energy-saving and environmental protection and sustainable development.So development low cost, low consumed high-effect economizing type construction(al)steel, further accelerate construction(al)steel kind high quality and update paces are very urgent.
Patent 200810233733,200810124722,200810124723 and 201010183312 has all proposed the production method of high strength cast iron, but be characterized in all having adopted hot rolling, raw material contain Mn, Si, even adopt B, V, the Ti of certain content to carry out Alloying Treatment, the intensity rank of reinforcing bar is HRB500; Although patent 200610125347 has proposed the production method of the high-strength hot rolled reinforced bar that intensity is higher, raw material have added a large amount of alloying element V, Cr, Mo, Ni etc. on the basis of 20MnSi; Patent 200910143268 proposes a kind of production method of large-diameter and high-strength finish rolling deformed bar, and the raw material that adopt are Q235B, but the tensile strength that can reach is 550MPa.
Summary of the invention
For overcoming the deficiencies in the prior art, the invention provides the production method of a kind of high-efficiency and energy-saving type cold-rolled threaded reinforcing steel for building, the method makes rolled piece cross section different parts realize longitudinally evenly extensional, reduce the residual stress that inhomogeneous deformation causes, reduce and roll after-baking temperature, cold-rolled threaded reinforcing steel is also improved in the high strength while toughness that keeps work hardening to bring.
In order to solve above technical problem, the present invention is achieved by the following technical programs.
The invention provides the production method of a kind of high-efficiency and energy-saving type cold-rolled threaded reinforcing steel for building, the work hardening technique that comprises crooked descaling process, cold roller and deformed process, also comprise even extension reinforcement process, this technique accomplishes to cooperatively interact with cold roller and deformed by controlling diameter, quantity, the orientation of bending roll, make each position of the horizontal section of rolled piece realize longitudinally evenly extensional, reduce the residual stress that inhomogeneous deformation causes, reduce and to roll after-baking temperature, by rolling rear online K cryogenic treatment, reach the object of improving reinforcing bar impact flexibility, keeping intensity after cold deformation.
Further, the working diameter of described bending roll is 120～125mm, and its quantity is set to 4, guarantees that de-scaling BENDING PROCESS sequentially realizes forward and the back-flexing of round base; Described 4 bending rolls (1,2,3,4) are along rolling centerline " " word arrangement, bending roll center line is vertical with rolling centerline, initiatively roll (10) center line is parallel with the 2nd frame, and extensional and rolling deformation are matched, and guarantees the even extensional of steel bar overall.
Further, the working diameter of described bending roll is 120～125mm, and its quantity is set to 4, guarantees that de-scaling BENDING PROCESS sequentially realizes forward and the back-flexing of round base; The center line of described bending roll (5,8) is vertical with rolling centerline, initiatively roll (10) center line is parallel with the 2nd frame, bent intermediate roller (6,7) center line and rolling center line parallel, match extensional and rolling deformation, guarantees the even extensional of steel bar overall.
Compared with prior art, the present invention has following technique effect:
1, the present invention makes rolled piece cross section different parts realize longitudinally evenly extensional, the logarithmic strain difference of round steel cross section different parts extensional is less than 0.1, reduced the residual stress that inhomogeneous deformation causes, reduced and rolled after-baking temperature (not higher than 350 ℃), in the high strength that the improved while of toughness has better kept work hardening to bring, reach the object that improves reinforcing bar comprehensive mechanical performance.
2, the cold-rolled ribbed screw-thread steel of Q235 of producing through technology of the present invention, its tensile strength is not less than 650MPa, and the stress relaxation rate that fracture elongation is not less than under 8%, 450MPa and 1000h is not more than 8%.
3, the present invention has improved the toughness of product and has reduced the stress relaxation rate of product on the basis that meets new nation's standard-required, reduce resource occupation, can reduce screw-thread steel use amount 10～20% with the following screw-thread steel comparison of IV level, meet the requirement of national energy-saving environmental protection, market application foreground is good, has significant economic benefit.
Accompanying drawing explanation
Fig. 1 is bending roll the first arrangement mode of the present invention.
Fig. 2 is bending roll the second arrangement mode of the present invention.
In figure: the crooked descaling device of I-; The cold rolling unit of II-; 1～8-bending roll; The passive roll of 9-the 1st frame; 10-the 2nd frame is roll initiatively; A-roller central line; B-rolling centerline; C-bending roll center line.
The specific embodiment
In order further to understand the present invention, below in conjunction with the drawings and specific embodiments, it is described in detail, but the present invention is not limited to following embodiment.
The Q235 carbon structural steel hot rolling wire rod of diameter phi 6.5～15.5mm is take in the present invention, and as raw material, (its composition meets standard < < GB/T701-2008 mild steel hot rolling wire rod > >, appearance and size meets standard < < GB/T14981-2009 gren rod size, profile, weight and permissible variation > >), by uncoiling unwrapping wire, crooked de-scaling, two passages are cold rolling, online heat treatment, two rib spirals of the simple procedures production diameter phi 5～12mm such as rolling, its tensile strength is not less than 650MPa, fracture elongation is not less than 8%, stress relaxation rate under 450MPa and 1000h is not more than 8%, appearance and size meets standard < < GB13788-2008 cold rolled reinforcing steel bar with ribs > >, there is low cost, high strength and the better distinguishing feature of toughness, there is unique novelty.
Working diameter 120～the 125mm of the bending roll that the present invention uses, roller footpath can guarantee that in this scope circle base de-scaling BENDING PROCESS realizes certain plastic elongation away from roll surface one side, near roll surface one side, elastic compression only occurs, circle base only occurs to extend by circle base order forward and back-flexing in de-scaling process and subtracts cross section deformation; According to rolling deformation degree, the bending roll arrangement mode of two kinds of different types is set, extensional and rolling deformation are matched, guarantee whole evenly extensional.The first arrangement mode: as shown in Figure 1,4 of bending roll quantity, along roll line " " word arrangement, bending roll (1,2,3,4) center line is vertical with rolling centerline, and initiatively roller central line is parallel with the 2nd frame; The second arrangement mode: as shown in Figure 2,4 of bending roll quantity, wherein bending roll (5,8) center line is vertical with rolling centerline, and initiatively roller central line is parallel with the 2nd frame, middle 2 bending roll (6,7) center lines and rolling center line parallel.
Embodiment 1
The Q235 cold-rolled thread steel that the diameter of take is 12mm specification is example, and circle base diameter 15.5mm, bending roll arrangement mode are pressed Fig. 1 mode.Spiral after rolling carries out Performance Detection, and result is as shown in table 1.
The cold-rolled ribbed spiral performance comparison of table 1 diameter 12mm
Embodiment 2
The Q235 cold-rolled thread steel that the diameter of take is 8mm specification is example, and circle base diameter 10.5mm, bending roll arrangement mode are pressed Fig. 2 mode.Spiral after rolling carries out Performance Detection, and result is as shown in table 2.
The cold-rolled ribbed spiral performance comparison of table 2 diameter 8mm
1 group of cold-rolled threaded reinforcing steel for adopting this technology to produce in [note] table 1, market has no like product.1 group of cold-rolled threaded reinforcing steel for adopting this technology to produce in table 2,2 groups is the cold-rolled ribbed spiral of market same specification.Table 2 is not due to more than the tensile strength of market same specification product reaches 650MPa, so the stress relaxation rate not carrying out under 450MPa and 1000h detects.
Claims (3)
1. the production method of a high-efficiency and energy-saving type cold-rolled threaded reinforcing steel for building, the work hardening technique that comprises crooked descaling process, cold roller and deformed process, it is characterized in that, also comprise even extension reinforcement process, this technique accomplishes to cooperatively interact with cold roller and deformed by controlling diameter, quantity, the orientation of bending roll, make each position of the horizontal section of rolled piece realize longitudinally evenly extensional, reduce the residual stress that inhomogeneous deformation causes, reduce and to roll after-baking temperature, by rolling rear online K cryogenic treatment, reach the object of improving reinforcing bar impact flexibility, keeping intensity after cold deformation.
2. the production method of a kind of high-efficiency and energy-saving type as claimed in claim 1 cold-rolled threaded reinforcing steel for building, it is characterized in that, the working diameter of described bending roll is 120～125mm, and its quantity is set to 4, guarantees forward and the back-flexing of crooked de-scaling procedural order realization circle base; Described 4 bending rolls (1,2,3,4) are along rolling centerline " " word arrangement, bending roll center line is vertical with rolling centerline, initiatively roll (10) center line is parallel with the 2nd frame, and extensional and rolling deformation are matched, and guarantees the even extensional of steel bar overall.
3. the production method of a kind of high-efficiency and energy-saving type as claimed in claim 1 cold-rolled threaded reinforcing steel for building, it is characterized in that, the working diameter of described bending roll is 120～125mm, and its quantity is set to 4, guarantees forward and the back-flexing of crooked de-scaling procedural order realization circle base; The center line of described bending roll (5,8) is vertical with rolling centerline, initiatively roll (10) center line is parallel with the 2nd frame, bent intermediate roller (6,7) center line and rolling center line parallel, match extensional and rolling deformation, guarantees the even extensional of steel bar overall.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672493A (en) * | 2018-04-11 | 2018-10-19 | 新疆八钢铁股份有限公司 | A kind of hot drawing formula milling method |
| CN108687133A (en) * | 2018-05-22 | 2018-10-23 | 安徽马钢比亚西钢筋焊网有限公司 | A kind of online stress eliminating device of steel bar cold rolling |
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| CN2095720U (en) * | 1990-10-26 | 1992-02-12 | 江苏江阴钢绳总厂 | Continuous pretreatment device for wire material surface |
| CN1680050A (en) * | 2004-04-05 | 2005-10-12 | 朱晖 | Cold-rolling nicking reinforcing bar with rib high-strength and low relaxation, production and production line thereof |
| CN101585052A (en) * | 2009-05-22 | 2009-11-25 | 北京铁科首钢轨道技术有限公司 | Large-diameter and high-strength finish rolling deformed bar and its manufacturing technique |
| CN102303043A (en) * | 2011-09-14 | 2012-01-04 | 邵阳高华工贸实业有限公司 | Cold-rolled ribbed steel bar production device and production method for the same |
| KR101280502B1 (en) * | 2011-03-11 | 2013-07-01 | 포항공과대학교 산학협력단 | High strength and high manganese steel wire rod having excellent cold head quality and method for manufacturing the same, and method for manufacturing bolt using the same |
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2013
- 2013-12-26 CN CN201310731876.9A patent/CN103639196B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2095720U (en) * | 1990-10-26 | 1992-02-12 | 江苏江阴钢绳总厂 | Continuous pretreatment device for wire material surface |
| CN1680050A (en) * | 2004-04-05 | 2005-10-12 | 朱晖 | Cold-rolling nicking reinforcing bar with rib high-strength and low relaxation, production and production line thereof |
| CN101585052A (en) * | 2009-05-22 | 2009-11-25 | 北京铁科首钢轨道技术有限公司 | Large-diameter and high-strength finish rolling deformed bar and its manufacturing technique |
| KR101280502B1 (en) * | 2011-03-11 | 2013-07-01 | 포항공과대학교 산학협력단 | High strength and high manganese steel wire rod having excellent cold head quality and method for manufacturing the same, and method for manufacturing bolt using the same |
| CN102303043A (en) * | 2011-09-14 | 2012-01-04 | 邵阳高华工贸实业有限公司 | Cold-rolled ribbed steel bar production device and production method for the same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672493A (en) * | 2018-04-11 | 2018-10-19 | 新疆八钢铁股份有限公司 | A kind of hot drawing formula milling method |
| CN108687133A (en) * | 2018-05-22 | 2018-10-23 | 安徽马钢比亚西钢筋焊网有限公司 | A kind of online stress eliminating device of steel bar cold rolling |
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Effective date of registration: 20210427 Address after: 243000 No.1, Yingbin Avenue, industrial concentration area, Taibai Town, Dangtu County, Ma'anshan City, Anhui Province Patentee after: Ma'anshan Yanlong New Material Technology Co.,Ltd. Address before: 243002 Anhui province Ma'anshan Huashan Lake District Road No. 59 Patentee before: ANHUI University OF TECHNOLOGY |
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