CN1097659A - The warm rolling method of spiral - Google Patents
The warm rolling method of spiral Download PDFInfo
- Publication number
- CN1097659A CN1097659A CN94105768A CN94105768A CN1097659A CN 1097659 A CN1097659 A CN 1097659A CN 94105768 A CN94105768 A CN 94105768A CN 94105768 A CN94105768 A CN 94105768A CN 1097659 A CN1097659 A CN 1097659A
- Authority
- CN
- China
- Prior art keywords
- rolling
- warm
- spiral
- temperature
- steel
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention belongs to the field of stress metal machine-shaping.Be specially adapted to utilize waste heat after the hot rolling to carry out the production method of warm-rolling spiral again.The inventive method is that the steel after the hot rolling are cooled to 600 ℃-300 ℃ on cold bed, and it is rolling by attemperator steel to be delivered to roughing mill, and the wire rod after rolling carries out finish rolling again and alleviates rag.Its roughing temperature is 600 ℃-300 ℃, and final rolling temperature is 400 ℃-200 ℃.The product temperature rise is to being not less than 300 ℃ after the finish rolling, and the processing total deformation rate should be 20%-60%.This method has the product good combination property compared with prior art, does not need to heat-treat and improve the characteristics such as service life of equipment.
Description
The invention belongs to the field of stress metal machine-shaping.Be specially adapted to utilize waste heat after the hot rolling to carry out the production method of warm-rolling spiral again.
The method of producing spiral at present only has two kinds of (1) hot-rolling method productions (2) cold rolling process production.Adopting hot-rolling method to produce in the process of spiral, its finishing temperature should be advanced cold bed or diffusing volume air cooling and arrive about 600 ℃ of shearings again, scale or collect rolling in 800 ℃ of-900 ℃ of scopes then.Shortcomings such as it is many to adopt hot-rolling method to produce its product surface iron scale of spiral, and the low and plasticity of intensity is higher.As the 1 grade reinforcing steel strength grade R235 of grade of steel Q235, σ s 〉=235MPa, σ b 〉=370MPa, δ 〉=25%.Have and adopt cold rolling process to produce spiral, it is rolling all at room temperature to carry out, and is that product has higher intensity though adopt the weak point of product that this method is produced, and plasticity is too low.The hot rolling raw material of grade of steel Q235 for example is cold-rolled to the spiral of φ 10mm with its diameter phi 12mm, and its performance parameter is σ 0.2=620MPa, σ b=630MPa, δ 10%=5.5%.Therefore this performance does not reach national standard and instructions for use, must roll the back tempering heat treatment in addition to product, so not only waste financial resources, material resources and man-hour, and the rolling the back quality and can not be protected of product.
The objective of the invention is to propose a kind of product combination property that can improve, and do not need to carry out again the method for the warm-rolling spiral of tempering heat treatment.
The method of warm-rolling spiral of the present invention, be exactly steel with hot-roll forming in specific temperature, interact between dislocation that produces in the system of the rerolling deformation process and solute atoms, make steel can obtain required optimum properties index.Basic principle according to purpose of the present invention and the rolling, the method of the warm-rolling spiral that we proposed is as follows, at first the steel after the hot rolling are lowered the temperature through cold bed, the steel temperature is dropped in 600 ℃ of-300 ℃ of scopes, again by attemperator with hot rolling after steel first roughing section delivering to close-coupled spiral milling train carry out warm-rolling, its rolling temperature scope should be at 600 ℃-300 ℃, when rolling and be lubricated, according to the different product specification, can roll out the flat oval cross section reinforcing bar of corresponding size, and then through adjusting device flat oval cross section reinforcing bar is sent into second finish rolling section and carry out warm-rolling, its rolling temperature scope is at 400 ℃-200 ℃, be lubricated when rolling, though this line of finish rolling tube reducing is rolled at a lower temperature, but start rolling temperature should not be lower than 200 ℃, because finish rolling tube reducing profit line makes flat oval cross section reinforcing bar itself that certain temperature rise be arranged, and the size of temperature rise depends on the size of second finish rolling section finishing mill acting, greatly then temperature rise of acting, otherwise then temperature rise is low, so the finished product temperature of finish rolling rear thread reinforcing bar should be not less than 300 ℃.Total machining deformation rate of this warm-rolling spiral method should be at 20%-60%.Roll the back air cooling to room temperature.
In the method for warm-rolling spiral of the present invention, the raw material that provides for hot rolling line is a bar, can raw material be cooled to back 600 ℃-300 ℃ through cold bed, deliver to again on the roller-way of band stay-warm case, carrying out sizing shears, and then the lubricated tube reducing of first roughing mill sending into close-coupled spiral milling train and warm-rolling become to require the reinforcing bar in the flat oval cross section of size, after 90 ° of the reinforcing bar of roughing process guide unit upsets, then enter the lubricated tube reducing rag of second finishing mill, the finish rolling start rolling temperature is 400 ℃-200 ℃, temperature rise should not be lower than 300 ℃ after the finish rolling, rolls the back air cooling to room temperature.Between first and second rolling mill is tandem rolling, prevents to draw steel rolling.Carry out scale at last and cut off, check and packing.Adopt the warm-rolling spiral method rolling hot-rolling bar raw material rolling mill practice schematically as follows:
600 ℃ of-300 ℃-stay-warm case-cutting to lengths-lubricated
Bar formula roller-way
Roughing-lubricated-finish rolling subtracts-scale-check
Tube reducing footpath rag is cut off packing
In the method for warm-rolling spiral of the present invention, the raw material that provides for hot rolling line be wire rod should be cooled to 500 ℃-600 ℃ after collect rolling, reinstall in the attemperator.Attemperator is a bell-type, and the wire rod hot rolling about 600 ℃ is placed on the interior pay off rack of attemperator, and general pay off rack is single armed or both arms, it also can be the multi-arm frame, pay off rack can rotate 360 °, and the tail end of first volume wire rod should weld with the head end of the second reel bar, and redundance is polished off.Wire rod about 600 ℃ utilizes self waste heat samming in stay-warm case after, the head end of first volume wire rod can be pulled out attemperator and send into eliminating rust except that in the device of oxidation iron sheet of multiple roll, first roughing mill then wire rod being sent into close-coupled spiral milling train is through lubricated reducing and rolling.Shut out the reinforcing bar in the flat oval cross section of corresponding size according to the different product specification, through kink and tension-adjusting gear control reinforcing bar, avoid drawing steel rolling again.And then reinforcing bar entered second finishing mill tube reducing rag and lubricated, and the finish rolling start rolling temperature is 400 ℃-200 ℃, finish rolling rear thread reinforcing bar finished product temperature should be not less than 300 ℃.To roll good spiral cutting to length at last, check and packing.Adopt the warm-rolling spiral the rolling wire rod raw material of method rolling mill practice schematically as follows:
600 ℃ of-500 ℃-bell-type insulation-unwrapping wire-remove oxidation iron sheet-lubricated
The butt welding of gren rod winding apparatus
Take-up is batched
Rolling-kink and-lubricated-tube reducing--the difficult packing of inspection
Tube reducing tension adjustment rag cutting to length
The production method of warm-rolling spiral of the present invention has following characteristics compared with prior art, and warm-rolling twisted steel production method of the present invention is the production spiral milling method that the heat that utilizes waste heat and warm-rolling after the hot rolling of hot-strip to be produced by distortion in rolling is finished on rolling line in the lump.The production method of this warm-rolling spiral has promptly overcome because the scale on surface that hot rolling comes for hot-rolled screw thread reinforcing bar product tape is many, and intensity level is low crosses high weak point with plasiticity index.And solved because the cold rolling intensity level of spiral product that makes is higher, and plasiticity index is crossed low and other uneconomical production method of carrying out tempering heat treatment again.Therefore the production method of warm-rolling spiral of the present invention has milling method simple, product combination property height.And can adopt existing cold-rolling equipment, and do not need to drop into again the more equipment fund, improve the service life of equipment and simplified characteristics such as rolling after-baking.This method is a kind of effective economical production spiral milling method.
Embodiment
Adopt the method for warm-rolling spiral of the present invention, we have carried out four batches of warm-rolling experiments to the hot rolling feed for the common low carbon Steel Bar During, and its warm-rolling technological process is as follows:
600 ℃ of-300 ℃-insulation-sizings are sheared-lubricated-roughing tube reducing
φ 16mm bar roller-way
-lubricated-finish rolling tube reducing rag-sizing shearing-mechanical properties test
Its processing parameter has been seen the embodiment contrast table and has been compared with the production method of existing cold-rolled threaded reinforcing steel, we are with the common low carbon Steel Bar During of above-mentioned hot rolling, adopt the production method of cold-rolled threaded reinforcing steel in the prior art, rolling a collection of product, its various parameters and performance also are listed in the sequence number 5 in the embodiment contrast table.
Used material is the ordinary low-carbon steel after the hot rolling in the embodiment contrast table, and warm-rolling materials diameter is φ 16mm, and rolling back product diameter is φ 12mm, and reduction of area is 43.8%.The rolling materials of cold-rolled threaded reinforcing steel and specification reduction of area are all identical with warm-rolling, and only milling method is different with the product mechanical property, is listed in the contrast table.Following table is the contrast of the production method and the mechanical property of the embodiment of the invention and prior art.From his-and-hers watches, can find out, because the metal deformation resistance of warm-rolling spiral of the present invention is lower than the cold-rolled threaded reinforcing steel, so the corresponding decline 20% of draught pressure, roll collars wear rate descends 10%, and the use combination property of warm-rolling spiral is than cold-rolled products excellence.
The contrast table of embodiment the inventive method product and prior art products
Claims (3)
1, a kind of method of warm-rolling spiral, this method is through attemperator by hot steel raw material, sizing is sheared, lubricated, roughing subtract through, lubricated, finish rolling subtracts through rag, operations such as sizing shearing and test package are formed, and it is characterized in that hot steel raw material is that steel are cooled in 600 ℃ of-300 ℃ of scopes through cold bed after the hot rolling, and by attemperator steel being delivered to first roughing mill again carries out warm-rolling, its start rolling temperature is at 600 ℃-300 ℃, send into second finishing mill after the roughing again and carry out warm-rolling and subtract rag, the final rolling temperature scope answers air cooling to room temperature at 400 ℃-200 ℃ after the finish rolling.
2,, it is characterized in that the temperature of finish rolling rear thread reinforcing bar finished product should be not less than 300 ℃ according to the described method of claim 1.
3,, it is characterized in that total machining deformation rate of warm-rolling spiral method should be at 20%-60% according to the described method of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94105768A CN1039629C (en) | 1994-05-25 | 1994-05-25 | Warm rolling method for threaded reinforcing bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94105768A CN1039629C (en) | 1994-05-25 | 1994-05-25 | Warm rolling method for threaded reinforcing bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1097659A true CN1097659A (en) | 1995-01-25 |
| CN1039629C CN1039629C (en) | 1998-09-02 |
Family
ID=5032177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94105768A Expired - Fee Related CN1039629C (en) | 1994-05-25 | 1994-05-25 | Warm rolling method for threaded reinforcing bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1039629C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1108387C (en) * | 2000-07-06 | 2003-05-14 | 钢铁研究总院 | Method for producing low carbon steel twisted steel |
| CN102179403A (en) * | 2011-03-23 | 2011-09-14 | 中冶赛迪工程技术股份有限公司 | Production device of high-strength fine-grain hot rolled ribbed steel bars and production process thereof |
| CN103468906A (en) * | 2013-09-17 | 2013-12-25 | 北京科技大学 | Process for preparing 2000 MPa nano-scale bainitic steel through low temperature rolling |
| CN103480647A (en) * | 2013-09-18 | 2014-01-01 | 陕西钢铁集团有限公司 | Device and method for manufacturing reinforcing steel bars by means of directly rolling small square billets at low temperatures without heating |
| CN106480260A (en) * | 2015-08-24 | 2017-03-08 | 鞍钢股份有限公司 | A kind of method that prestressed steel bar is directly produced using burning optimization on line |
| CN112742865A (en) * | 2020-12-08 | 2021-05-04 | 安阳复星合力新材料股份有限公司 | Energy-saving production process of cold-rolled steel bar |
| CN112742863A (en) * | 2020-12-04 | 2021-05-04 | 安阳复星合力新材料股份有限公司 | Production method of cold-rolled steel bar |
| CN112742864A (en) * | 2020-12-04 | 2021-05-04 | 安阳复星合力新材料股份有限公司 | Production process of cold-rolled steel bar |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2552364A (en) * | 1946-06-10 | 1951-05-08 | Sheffield Steel Corp | Reinforcing bar or rod |
| US2957240A (en) * | 1956-08-17 | 1960-10-25 | Robert A Brandes | Method of making concrete reinforcing elements from ribbed steel bars |
| SU1242265A1 (en) * | 1985-01-08 | 1986-07-07 | Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт Им.Л.И.Брежнева | Method of rolling reinforcement bars |
| CN2057119U (en) * | 1989-08-12 | 1990-05-16 | 冶金工业部钢铁研究总院 | Compact type rolling mill for cold-rolled torsteel |
-
1994
- 1994-05-25 CN CN94105768A patent/CN1039629C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1108387C (en) * | 2000-07-06 | 2003-05-14 | 钢铁研究总院 | Method for producing low carbon steel twisted steel |
| CN102179403A (en) * | 2011-03-23 | 2011-09-14 | 中冶赛迪工程技术股份有限公司 | Production device of high-strength fine-grain hot rolled ribbed steel bars and production process thereof |
| CN102179403B (en) * | 2011-03-23 | 2012-12-05 | 中冶赛迪工程技术股份有限公司 | Production device of high-strength fine-grain hot rolled ribbed steel bars and production process thereof |
| CN103468906A (en) * | 2013-09-17 | 2013-12-25 | 北京科技大学 | Process for preparing 2000 MPa nano-scale bainitic steel through low temperature rolling |
| CN103480647A (en) * | 2013-09-18 | 2014-01-01 | 陕西钢铁集团有限公司 | Device and method for manufacturing reinforcing steel bars by means of directly rolling small square billets at low temperatures without heating |
| CN103480647B (en) * | 2013-09-18 | 2016-03-23 | 陕西钢铁集团有限公司 | A kind of device and production method thereof of producing reinforcing bar without heating low temperature Direct Rolling small billet |
| CN106480260A (en) * | 2015-08-24 | 2017-03-08 | 鞍钢股份有限公司 | A kind of method that prestressed steel bar is directly produced using burning optimization on line |
| CN112742863A (en) * | 2020-12-04 | 2021-05-04 | 安阳复星合力新材料股份有限公司 | Production method of cold-rolled steel bar |
| CN112742864A (en) * | 2020-12-04 | 2021-05-04 | 安阳复星合力新材料股份有限公司 | Production process of cold-rolled steel bar |
| CN112742865A (en) * | 2020-12-08 | 2021-05-04 | 安阳复星合力新材料股份有限公司 | Energy-saving production process of cold-rolled steel bar |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1039629C (en) | 1998-09-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0889762B1 (en) | Method for producing hot-rolled steel strip | |
| DE19758108C1 (en) | Method and installation for continuous production of hot rolled thin flat products | |
| AT391430B (en) | METHOD FOR PRODUCING TUBES FROM NON-FERROUS METAL | |
| EP1752549A1 (en) | Process for manufacturing grain-oriented magnetic steel spring | |
| WO2008000396A1 (en) | A method and a system for producing hot-rolled strip silicon steel based on thin slabs | |
| DE3027927C2 (en) | ||
| EP0761326A1 (en) | Installation for producing hot rolled thin strip | |
| CN114173957B (en) | Production of deep drawable steel strip in a casting and rolling complex | |
| EP1001856B1 (en) | METHOD FOR PRODUCING WELDED Cu AND Cu ALLOY PIPES | |
| CN1097659A (en) | The warm rolling method of spiral | |
| EP0595282B2 (en) | Method and installation for manufacturing hot-rolled steel strip, in particular from a continuously cast material | |
| CN111604697B (en) | Control method for transverse folding defect of thin-specification low-carbon steel | |
| DE60004948T2 (en) | METHOD FOR THE CONTINUOUS PRODUCTION OF A METAL STRIP | |
| US5862699A (en) | Method for the rolling of long products and rolling line which performs that method | |
| DE2734500A1 (en) | PROCESS FOR MANUFACTURING ELECTRIC SHEETS AND STRIPS, IN PARTICULAR FE-SI SHEETS AND STRIPS | |
| JP3293933B2 (en) | Method for precision rolling of wire rod or rolled material having round cross section and rolling line | |
| EP1525060B1 (en) | Method and device for the continuous production of metallic strips | |
| DE2505210C2 (en) | Process for the production of fine sheet metal by cold rolling a tempered steel strip | |
| WO1999058263A1 (en) | System and method for producing steel strip | |
| JPH0824908A (en) | Rolling method for stainless steel and high alloy steel strip | |
| CN112828036B (en) | Method for improving low-temperature impact toughness of thick high-strength steel | |
| CN113787099B (en) | Acid pickling cold rolling method for 780 MPa-grade high-strength automobile plate | |
| JP2825986B2 (en) | Method for producing thin hot rolled steel sheet with excellent surface properties | |
| EP1420072B1 (en) | Process of making hot rolled strip for manufacturing non oriented electrical steel strip and non-oriented electrical steel sheet thereby obtained | |
| WO1999039847A1 (en) | Method and apparatus for the manufacture of light gauge steel strip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: GENERAL RESEARCH INST. OF IRON AND STEEL, MINISTRY OF METALLURGICAL INDUSTRY TO: ANTAI SCIENCE AND TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Antai Science and Technology Co., Ltd. Patentee before: Iron and Steel Central Research Institute of Ministry of Metallurgical Industry |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |