CN107570675A - The pouring technology of improved continuous small-billet casting production medium and high carbon steel - Google Patents
The pouring technology of improved continuous small-billet casting production medium and high carbon steel Download PDFInfo
- Publication number
- CN107570675A CN107570675A CN201710647421.7A CN201710647421A CN107570675A CN 107570675 A CN107570675 A CN 107570675A CN 201710647421 A CN201710647421 A CN 201710647421A CN 107570675 A CN107570675 A CN 107570675A
- Authority
- CN
- China
- Prior art keywords
- tundish
- long nozzle
- molten steel
- steel
- coverture
- 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.)
- Pending
Links
Landscapes
- Continuous Casting (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of pouring technology of improved continuous small-billet casting production medium and high carbon steel, the technique includes following measures：(1) installation of long nozzle is improved, improves long nozzle installation quality, avoids long nozzle dress inclined；(2) use tundish long nozzle argon-blowing device, ensure that molten steel slightly seethes in Argon process tundish, do not allow to occur sparks fly off molten steel phenomenon；(3) slag blocking wall is used in tundish；(4) tapping temperature control is at 1595 °C ± 10 °C；(5) operated using rational ladle, the temperature drop of ladle operation process is 1 minute≤3 °C；(6) strengthen tundish covering flux to use, coverture is carbon-free magnesia coverture, and addition is that molten steel per ton adds 0.6 kilogram.Present invention optimization pouring technology, is advantageous to the removal of field trash, strengthens the control to molten steel overheat, strengthen the use to tundish covering flux, improve the surface quality and internal soundness of continuous casting billet, improve product competitiveness in the market.
Description
Technical field
The present invention relates to a kind of pouring in steel smelting technique, the pouring technology for belonging to continuous small-billet casting production medium and high carbon steel changes
Enter, particularly a kind of pouring technology of improved continuous small-billet casting production medium and high carbon steel.
Background technology
With the change of international rolled steel market environment, how using limited scrap resources high quality, high additional is produced
The product of value turns into the problem that each iron and steel enterprise must tackle key problems.By the implementation of medium and high carbon steel technology, pass through MEMS（Electromagnetism
Stirring）The utilization of technology, the utilization of continuous casting whole process protection placingJi Shu, the utilization of tundish pushing off the slag technology, it is subcutaneous to solve strand
Bubble, blibbing, edge cracks are obvious, and proportion of equiaxed grain is less, and center carbon normal segregation is larger, and inclusion content is high, center
The quality problems such as loose, shrinkage cavity is serious, improve product competitiveness in the market, realize and improve technology level, improve product quality
Target.
The continuous expansion of the long material kind of continuous small-billet casting at present, is carried to continuous casting billet quality particularly surface and internal soundness
Go out higher requirement, and pour into a mould now using M-EMS（MEMS）With casting blank solidification end electromagnetic agitation（FEMS）Afterwards
Due to the optimal mixing parametric of each steel grade can not be determined, therefore it can not meet that high quality variety steel produces, medium high carbon variety steel center
The mass defects such as segregation, center porosity, shrinkage cavity, occur core rigidities exception in the steel rolling operation of rolling, go out in Cold Drawing Process
Existing implosion, it is hot candied when there is cup and subulate fracture and reduce fatigue life phenomenon.
The content of the invention
It is an object of the invention to provide a kind of pouring technology of improved continuous small-billet casting production medium and high carbon steel, the present invention
Optimize pouring technology, be advantageous to the removal of field trash, strengthen the control to molten steel overheat, strengthen making tundish covering flux
With improving the surface quality and internal soundness of continuous casting billet, improve product competitiveness in the market.
The object of the present invention is achieved like this：A kind of pouring technology of improved continuous small-billet casting production medium and high carbon steel,
It is characterized in that the technique includes following measures：
(1) installation of long nozzle is improved, improves long nozzle installation quality, avoids long nozzle dress inclined；
(2) tundish long nozzle argon-blowing device is used, ensures that molten steel slightly seethes in Argon process tundish, does not allow steel occur
Flower splash phenomena；
(3) slag blocking wall is used in tundish；
(4) tapping temperature control is at 1595 °C ± 10 °C；
(5) operated using rational ladle, the temperature drop of ladle operation process is 1 minute≤3 °C；
(6) strengthen tundish covering flux to use, coverture is carbon-free magnesia coverture, and addition is that molten steel per ton adds 0.6
Kilogram.
Small billet specification is small billet cross section side size range 120-170mm.
Beneficial effect caused by invention：
1st, by improving and improving continuous casting technique, medium high carbon steel produced by CC base rimhole is by original 2.5-4/100
cm2, stability contorting is less than 1/100 cm2;Blibbing is more than 10/100 cm by original2, it is stable less than 6/
100 cm2.Edge cracks are stable below 0.5.Equiax crystal increases to 40% by original 25%.Implement preceding center carbon normal segregation compared with
Greatly, it is mostly negative segregation to implement area of rear center, and degree of segregation is little.Field trash is stable below 0.5 grade by original 2 grades or so.
Shrinkage cavity is more than 4 grades by original, and stabilization is at 1.5 grades.
2nd, product competitiveness in the market is improved, considerable economic benefit is created for enterprise；Improve industry and utilize social resources
Ability, realize improve technology level, improve product quality target.
3rd, the situation of medium and high carbon steel high-end product production is started, is laid further to produce numerous high-end products from now on
Basis.
The scope of application and application prospect of invention：
This method is applied to same type method for making steel, according to the difference of smelted steel grade, can develop the slag of itself suitable needs
System, in favor of the removal of field trash, meet different other steel grades to the demand of quality control, lift the quality of steel, reach work
The target of sequence direct motion.
Present invention optimization pouring technology, is advantageous to the removal of field trash, strengthens the control to molten steel overheat, strengthen
Use to tundish covering flux, the surface quality and internal soundness of continuous casting billet are improved, improves product competitiveness in the market.
Embodiment
Original molding casting technique simply simply takes big bag long nozzle+coverture+stopper+submersed nozzle
Pouring type, technique is simple, resistance to material has certain defect, molding casting DeGrain.The pouring technology process of optimization is taken
Following measures：
1st, installed by improving long nozzle, improve long nozzle installation quality, avoid the mouth of a river from filling inclined situation.
2nd, using tundish long nozzle argon-blowing device, ensure that molten steel slightly seethes in Argon process tundish, does not allow
Phenomenon that now sparks fly off molten steel.
3rd, slag blocking wall is used in tundish, foreign substance in molten steel in tundish is increased, be capped agent and absorb, improve molten steel matter
Amount；
4th, suitable tapping temperature is controlled, tapping temperature control is 1595 °C ± 10 °C；
5th, operated using rational ladle, it is 1 minute≤3 °C to control ladle operation process temperature drop；
6th, strengthen tundish covering flux to use, coverture is carbon-free magnesia coverture, by original ton steel less than 0.4 kilogram
Bring up to 0.6 kilogram.
Claims (1)
- A kind of 1. pouring technology of improved continuous small-billet casting production medium and high carbon steel, it is characterized in that the technique includes following measures：(1) installation of long nozzle is improved, improves long nozzle installation quality, avoids long nozzle dress inclined；(2) tundish long nozzle argon-blowing device is used, ensures that molten steel slightly seethes in Argon process tundish, does not allow steel occur Flower splash phenomena；(3) slag blocking wall is used in tundish；(4) tapping temperature control is at 1595 °C ± 10 °C；(5) operated using rational ladle, the temperature drop of ladle operation process is 1 minute≤3 °C；(6) strengthen tundish covering flux to use, coverture is carbon-free magnesia coverture, and addition is that ton molten steel adds 0.6 thousand Gram.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710647421.7A CN107570675A (en) | 2017-08-01 | 2017-08-01 | The pouring technology of improved continuous small-billet casting production medium and high carbon steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710647421.7A CN107570675A (en) | 2017-08-01 | 2017-08-01 | The pouring technology of improved continuous small-billet casting production medium and high carbon steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107570675A true CN107570675A (en) | 2018-01-12 |
Family
ID=61034237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710647421.7A Pending CN107570675A (en) | 2017-08-01 | 2017-08-01 | The pouring technology of improved continuous small-billet casting production medium and high carbon steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107570675A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111957918A (en) * | 2020-09-08 | 2020-11-20 | 福建三钢闽光股份有限公司 | Control method for stabilizing superheat degree of 400VN steel in starting process |
| CN115647313A (en) * | 2022-11-14 | 2023-01-31 | 鞍钢股份有限公司 | Steel ladle covering agent suitable for straightening SPHC steel grade and using method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10137910A (en) * | 1996-11-08 | 1998-05-26 | Nippon Steel Corp | Continuous casting method |
| CN201913209U (en) * | 2010-12-24 | 2011-08-03 | 莱芜钢铁股份有限公司 | Continuous casting tundish used for improving cleanliness of molten steel |
| CN102259175A (en) * | 2011-07-16 | 2011-11-30 | 鞍山市和丰耐火材料有限公司 | Production method for Ca-Al-Mg carbon-free tundish covering flux |
| JP2014208376A (en) * | 2013-03-22 | 2014-11-06 | Ｊｆｅスチール株式会社 | Method of manufacturing high cleanliness steel slab by continuous molding |
| CN104233044A (en) * | 2014-10-08 | 2014-12-24 | 攀钢集团西昌钢钒有限公司 | Production method of high aluminum steel |
| CN106011672A (en) * | 2016-07-29 | 2016-10-12 | 常州东大中天钢铁研究院有限公司 | Philippine-standard straight screw-thread steel and low-cost production technology thereof |
| CN106555025A (en) * | 2015-09-29 | 2017-04-05 | 李月梅 | A kind of low field trash production method for cord steel |
-
2017
- 2017-08-01 CN CN201710647421.7A patent/CN107570675A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10137910A (en) * | 1996-11-08 | 1998-05-26 | Nippon Steel Corp | Continuous casting method |
| CN201913209U (en) * | 2010-12-24 | 2011-08-03 | 莱芜钢铁股份有限公司 | Continuous casting tundish used for improving cleanliness of molten steel |
| CN102259175A (en) * | 2011-07-16 | 2011-11-30 | 鞍山市和丰耐火材料有限公司 | Production method for Ca-Al-Mg carbon-free tundish covering flux |
| JP2014208376A (en) * | 2013-03-22 | 2014-11-06 | Ｊｆｅスチール株式会社 | Method of manufacturing high cleanliness steel slab by continuous molding |
| CN104233044A (en) * | 2014-10-08 | 2014-12-24 | 攀钢集团西昌钢钒有限公司 | Production method of high aluminum steel |
| CN106555025A (en) * | 2015-09-29 | 2017-04-05 | 李月梅 | A kind of low field trash production method for cord steel |
| CN106011672A (en) * | 2016-07-29 | 2016-10-12 | 常州东大中天钢铁研究院有限公司 | Philippine-standard straight screw-thread steel and low-cost production technology thereof |
Non-Patent Citations (1)
| Title |
|---|
| 周建男: "《钢铁生产工艺装备新技术》", 31 January 2004, 冶金工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111957918A (en) * | 2020-09-08 | 2020-11-20 | 福建三钢闽光股份有限公司 | Control method for stabilizing superheat degree of 400VN steel in starting process |
| CN111957918B (en) * | 2020-09-08 | 2021-10-26 | 福建三钢闽光股份有限公司 | Control method for stabilizing superheat degree of 400VN steel in starting process |
| CN115647313A (en) * | 2022-11-14 | 2023-01-31 | 鞍钢股份有限公司 | Steel ladle covering agent suitable for straightening SPHC steel grade and using method |
| CN115647313B (en) * | 2022-11-14 | 2023-08-18 | 鞍钢股份有限公司 | Ladle covering agent suitable for SPHC steel grade straight up and use method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104259415B (en) | A kind of continuous cast method of continuous cast round billets | |
| CN104498805B (en) | Production method of high-carbon low-nitrogen steel for strand wires | |
| CN103334050B (en) | Process utilizing sheet billet continuous casting to manufacture low aluminum silicon calm carbon structural steel | |
| CN101279362B (en) | Method for manufacturing low-segregation large-sized steel ingot by quickening cooling of bottom and lateral wall | |
| CN104338926A (en) | Method for increasing self-pouring rate of ladle and purity degree of molten steel | |
| CN109332625B (en) | Casting method for improving stopper rod flow control Al deoxidized steel nozzle blockage | |
| CN104278197A (en) | Smelting method of steel for low-silicon high-titanium welding wire | |
| CN105385811A (en) | Production method for steel containing aluminum | |
| CN107651968A (en) | A kind of refined steel ladles chromium matter stuffing sand and preparation method thereof | |
| CN103194573B (en) | Method for treating molten steel calcium, composite calcium line and method for manufacturing steel | |
| CN107570675A (en) | The pouring technology of improved continuous small-billet casting production medium and high carbon steel | |
| CN104233044B (en) | The production method of a kind of high aluminum steel | |
| CN103938088B (en) | A kind of sheet billet continuous casting method of resistance alloy Cr20AlY | |
| CN103962517B (en) | A kind of apparatus for pouring of die casting electrode bar and pouring procedure thereof | |
| CN105251954B (en) | A kind of ingot steel casting mould and pouring procedure | |
| CN114086081A (en) | Method for controlling center loosening in cold forging steel production by small-section casting blank | |
| CN104212940B (en) | Prevent the method blocking the mouth of a river containing sulphur Pinion Steel SAE8620H | |
| CN102773442B (en) | Cast-on method for continuously casting half-rimmed steel | |
| CN112501477A (en) | Micro-carbon low-sulfur high-aluminum iron-free aluminum-magnesium-calcium alloy deoxidizer and preparation method and application thereof | |
| CN106756180A (en) | A kind of calcium/magnesia grain refiner and its preparation method and application | |
| CN105903916A (en) | Continuous casting method for producing non-magnetic steel on straight-arc-shaped continuous casting machine | |
| CN102634717B (en) | Manufacturing method for steel ingot of axle steel | |
| CN104805337A (en) | Rear-earth aluminum, silicom and calcium ferroalloy and preparation method of rear-earth aluminum, silicom and calcium ferroalloy | |
| CN205170881U (en) | Nickelbase superalloy slag separates on cooling groove | |
| CN107475484A (en) | Al is reduced during one kind cast aluminium-killed-cold-heading steel2O3The method that C matter stopper corrodes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180112 |