CN106170566B - Weld calcium core-spun yarn and its application method in liquid steel refining - Google Patents
Weld calcium core-spun yarn and its application method in liquid steel refining Download PDFInfo
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- CN106170566B CN106170566B CN201480076534.0A CN201480076534A CN106170566B CN 106170566 B CN106170566 B CN 106170566B CN 201480076534 A CN201480076534 A CN 201480076534A CN 106170566 B CN106170566 B CN 106170566B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
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Abstract
A kind of welding calcium core-spun yarn and its application method in liquid steel refining.Calcium core-spun yarn is welded, is the wire body of the seamless steel shell package solid calcium core wire being welded by high frequency induction welding connection and the 8~10mm of diameter formed, solid calcium core wire weighs 52~60g/m, and seamless welding steel shell weighs 180~230g/m.It is uniform to weld calcium core-spun yarn line footpath, high mechanical strength, deeper portion in molten steel can be fed, slow down or avoid splash, and calcium is enable to be evenly distributed in molten steel ladle, the service efficiency (calcium recovery rate improves 2~5 times) of calcium line is improved, and goes to be mingled with better effect, the flaw detection qualification rate of steel is improved to 99% or more；The feed quantity that welding calcium core-spun yarn can be reduced using this method, can not only reduce STEELMAKING PRODUCTION cost, moreover it is possible to save the Calcium treatment time, reduce the temperature loss during molten steel Calcium treatment, molten steel nitrogen pick-up, oxygenation situation effectively during control steel treatment.
Description
Technical field
The present invention relates to liquid steel refining technical fields, and in particular to a kind of welding calcium core-spun yarn and its in liquid steel refining
Application method.
Background technique
Wire-feeding technique is the new liquid steel refining technology to grow up after the technology of dusting, is exactly by deoxygenation of liquid steel, takes off
Sulphur, carburetting, be mingled with denaturation, trimming needed for material thread (solid wire or filling the cored suede in relation to pulvis) is made,
The mechanical forces of feeding wire machine are used it is passed through molten steel face with certain speed and reaches a kind of novel secondary essence in molten steel deep
Refining technology.Compared to other Secondary Refining Technologies, the especially technology of dusting, there is yield of alloy height, accurate composition control, set
It is standby simple, small investment, process safety are reliable, molten steel cooling less, non-environmental-pollution the advantages that, thus from the mid-1970s develop with
Come, at home and abroad smelting iron and steel enterprise has been more and more widely used.
Existing iron and steel enterprise's purified steel is mostly powder core or pure calcium core-spun yarn with core-spun yarn.The existing general strip of core-spun yarn is thick
Degree is 0.35~0.60mm, and some is with the button side (referring to Fig. 1, Fig. 2) fastened, and the button edge fastened is divided into steel strip thickness
4~5 times, some then has and the visibly different weld seam knot of shell material (referring to Fig. 3).The common calcium iron wire on buckle side mostly with
The interior mode taken out and rotated feeds molten steel, because it is there are button rim portion outstanding, can bring more air into, cause to molten steel
Secondary pollution；In addition, the running track that the resistance generated because being rotated into molten steel will lead to wire body changes, and then not
Optimum depth can be reached, so needing just to be able to satisfy the need of steel mill's refining using higher wire-feeding velocity and biggish feed quantity
It wants.But higher wire-feeding velocity and changeable running track will cause molten steel splash, and cause calcium that cannot uniformly be scattered in steel
Bao Zhong, calcium recovery rate are low.The welded tube of calcium iron wire with weld seam leads to its machine because it has the weld seam different from steel band ontology material
Tool intensity is difficult to meet the needs of existing liquid steel refining line feeding depth.Traditional Ca-Si core-spun yarn, Ca-Al core-spun yarn and common
Calcium iron wire is influenced by its shaping structures technique, is caused the Ca recovery rate after unstable, is unfavorable for liquid steel refining quality
Control.
For the seamless relatively seamed product of calcium iron wire, production technology is more complex, and the enterprise being able to produce both at home and abroad is less, and
Majority is still in development phase；And it is difficult to produce the solid calcium iron wire compared with thickness steel casing using existing technology, and compared with
The common calcium iron wire of thin steel shell then needs very high wire-feeding velocity, causes its releasing position in ladle not easy to control.Currently,
Smelting iron and steel enterprise accordingly decreases steel-making there is an urgent need to improve the quality of liquid steel refining compared with the seamless calcium iron wire of thickness steel casing
Production cost.A kind of seamless calcium line and preparation method thereof is disclosed in patent document CN 102417950B, which employs ratio-frequency weldings
The method connect to carry out the butt joint edge of the steel band of cladding calcium core seamless welding, but the defect rate of the technical solution is high, production effect
Rate is low, production cost is excessively high, and properties of product are also to be improved.The main reason for generating these shortcomings is: still
Circulating current caused by impedor can not be placed (in vain because wrapping up calcium core in pipe during high-frequency welding by not solving
Electric current) big, technical problem that energy consumption is high；Used items high-frequency induction welding technique parameter has much room for improvement；And the calcium in product
Iron is than unreasonable.
And it is well known that the selection of high-frequency induction welding technique relevant parameter, is related to the quality of welding quality, Jin Erying
Ring the integral strength for arriving welded tube product, credit rating and speed of production.In actual production process, HFI welding quality is influenced
Parameter it is very more, and the interaction that interacts between these parameters.For example the installation site of induction coil will affect V
The length at shape angle, the gap between compression roller influence whether welding amount of compression and the size of extruding force etc..In HFI welding
Production process in parameters selection usually to the property of the stability of welding process, the stability of welding quality and welded tube
Can all there be very big influence.
Summary of the invention
It does not crack when the technical problem to be solved in the present invention is to provide a kind of calcium iron proportions rationally, rigidity is good and line feeding, energy
Slow down or avoid molten steel splash, calcium recovery rate height, go to be mingled with the good welding calcium core-spun yarn of effect；And disclose the welding calcium cored
Application method of the line in liquid steel refining, this method can effectively reduce the usage amount of calcium line, liquid steel refining are greatly reduced
Production cost.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of welding calcium core-spun yarn is designed, is the wire body being wrapped up solid calcium core wire by seamless welding steel shell and being formed, it is described
Wire body 8~10mm of diameter, solid calcium core wire weigh 52~60g/m, and seamless welding steel shell weighs 180~230g/m；The welding calcium cored
The preparation method of line the following steps are included:
(1) choosing diameter is the pure calcium silk of 5~9mm as solid calcium core wire；
(2) it twists after taking the mild-carbon steel strip with a thickness of 1.0~1.5mm to coat the calcium core wire and is shaped to pipe；
(3) with high frequency induction welding connection by the jointing edge of above-mentioned pipe under atmosphere of inert gases in be closely welded on one
Rise, and the engaging portion after butt welding connects immediately carries out air-cooled or contactless water cooling, when HFI welding alternating current used
Frequency be 350~430KHz, 2 °~4 ° of the meeting close angle of two edge of V-arrangement zone steel, V-arrangement section length is (to meeting in the middle part of induction coil
The distance of chalaza) it is 1.3~1.6 times of pipe caliber；The number of turns of induction coil used is 2~3, and internal diameter is pipe caliber
1.2~1.5 times, length is less than or equal to the internal diameter of itself, is more than or equal to pipe outer diameter；Welding temperature when HFI welding
(welding input power), speed, extruding force (amount of compression) three interact, suitable to select in welding process of the present invention
It is 1250~1460 DEG C of welding temperature when HFI welding, (pipe of package calcium core wire squeezes welding amount of compression in welding
The difference of circumferential length before and after pipe) it is 0.33~0.67 times of mild-carbon steel strip thickness, 30~50m/min of speed of welding；
(4) cut off solder bond position burr, then after shaped, stretch processing welding calcium core-spun yarn.
Before coating calcium core wire, processing first can be passivated to molding calcium core wire outer surface:
At least one layer of passivator is uniformly coated in solid calcium core wire outer surface, and after 8~15min of standing, in 110~120
At DEG C, after dry 0.5~1h, that is, passivation film is formed, the passivator is pressed by atoleine, soda ash: 4~6: 1~2 weight
Amount is than composition.
Application method of the above-mentioned welding calcium core-spun yarn in liquid steel refining, includes the following steps:
(1) molten steel through LF furnace refine or RH furnace refining treatment after, with feeding wire machine with the line feeding of 70~120m/min speed
It spends and feeds above-mentioned welding calcium core-spun yarn into molten steel, feed quantity feeds 0.4m~1.0m by molten steel per ton by the molten steel of silicon deoxidation,
0.8m~1.5m is fed by the molten steel of aluminium deoxidation molten steel per ton；
(2) 4~6min is reacted after the feeding of welding calcium core-spun yarn, while with the flow argon bottom-blowing of 10~50m3/min.
In above-mentioned steps (1), after molten steel reaches LF furnace, it is fast that lime, refining slag and slag deoxidier are added according to a conventional method
Speed makes white slag, forms refining slag weight percent after slugging are as follows: dual alkalinity CaO/SiO2 control is 5~10, (TFe+
MnO the full aluminium that aluminum shot is added in 16~29%, molten steel or feeds in aluminum steel adjustment molten steel for) %≤4%, Al2O3% control contains
Amount, LF furnace after treatment, when Holo-Al content is in 0.015%~0.040%, feeding welding calcium core-spun yarn carries out Calcium treatment.
After the step (2), the molten steel after the refining of LF furnace is directly entered continuous casting working procedure, or introduces RH furnace and carry out
Further refining, RH furnace 20~50min of vacuum processing time, the processing time that wherein vacuum degree is 50~300Pa is 12~
30min, when vacuum processing, do not add containing aluminium deoxidizer；Then second with feeding wire machine with the wire-feeding velocity of 70~120m/min to
Above-mentioned welding calcium core-spun yarn is fed in molten steel, feed quantity feeds 0.8m~1.5m, variety steel by the molten steel molten steel per ton of aluminium deoxidation
Molten steel per ton feeds 1.2~1.6m.
The invention has the advantages that:
1. strip used by present invention welding calcium core-spun yarn is thick, rigidity is high, line footpath is uniform, without button edge outstanding
The case where dividing, thus bring line feeding trail change be also not present；And weld seam is melted by the base material of steel band ontology, machine
Tool intensity is better than general welded tube, it is thus possible to feed in the deeper molten steel of ladle, effectively slow down or avoid molten steel splash, and make calcium
It can be evenly distributed in the molten steel in ladle, the service efficiency of calcium line is significantly increased, calcium yield can be improved 2~5 times,
And go to be mingled with better effect, the flaw detection qualification rate of steel is improved by 96% to 99% or more.
2. production practices show the selection of the parameters in HFI welding technique of the present invention rationally, such as
It uses appropriate adjustment to reduce the synthesis such as V-arrangement angle (enhance kindred effect), the frequency for increasing alternating current, reduction induction coil to arrange
Apply increase pipe internal impedance (and then increase V-arrangement area welding current and substantially reduce invalid circulating current), change tradition
In high frequency welding method must by coaxially placing the way of impedor (bar magnet) Lai Zeng great internal surface of bloom induction reactance in pipe,
The technical problem of impedor can not be placed because being enclosed with calcium core in pipe to be welded by solving the present invention；For another example using 30~
The weldering speed of 50m/min can make welding section heating speed be exceedingly fast, and the enhancing of workpiece autorefrigeration, heat affected area is narrow and is not susceptible to oxygen
The phenomenon that changing, can get tissue and weld seam of good performance, burning and not weld penetration will not be generated；It is in addition reasonable that speed of welding improves
Amount of compression, be not only advantageous to shorten heat affected area, be conducive to from melting groove squeeze out oxide layer, and improve production effect
Rate.
3. the manufacturing technique method of present invention welding calcium core-spun yarn and the reasonable selection of related process parameters, so that it is produced
Efficiency greatly improves, defect rate substantially reduces, produce and use cost substantially reduces, and is conducive to popularize.
4. can reduce the feed quantity of welding calcium core-spun yarn using application method of the present invention in liquid steel refining, not only can
Steel refining production cost is greatly reduced, moreover it is possible to it saves the Calcium treatment time, reduces the temperature loss during molten steel Calcium treatment,
Molten steel nitrogen pick-up, oxygenation situation effectively during control steel treatment.
5. the mass fraction of oxygen total in steel can be controlled respectively using application method of the present invention in liquid steel refining to (5
~20) × 106, for most field trash in steel after capable of making refining as spherical shape, the equivalent diameter of field trash is that (1~10) is micro-
Rice rolls rear steel plate inspection qualification rate greater than 99%, B type impurity grading overall reduction, and 1 grade or less ratio accounts for 95%, field trash
Controlled level significantly improves, and quality problems caused by greatly reducing because of field trash, practical application shows to make monthly because of field trash
Less than 0.5%, economic benefit significantly improves caused rejection rate.
Detailed description of the invention
Fig. 1 is a kind of cross-sectional configuration schematic diagram of conventional pure calcium core-spun yarn；
Fig. 2 is the cross-sectional configuration schematic diagram of another conventional pure calcium core-spun yarn；
Fig. 3 is the cross-sectional configuration schematic diagram of another conventional pure calcium core-spun yarn；
Fig. 4 is the cross-sectional configuration schematic diagram of present invention welding calcium core-spun yarn.
In figure, 1 is calcium core wire, and 2 be thin steel strip, and 3,6 be tightening buckle side, and 4 be solid calcium core wire, and 5 be seamless welding steel shell,
7 be weld seam.
Specific embodiment
Raw material as used in the following examples etc. is unless otherwise instructed commercially available；Method therefor unless otherwise instructed,
It is conventional method.
Embodiment 1: a kind of welding calcium core-spun yarn is referring to fig. 4 shape by seamless welding steel shell package solid calcium core wire
At wire body, the wire body diameter 9mm, solid calcium core wire weighs 54 ± 2g/m, seamless welding steel shell weight 200g/m；The welding calcium packet
The preparation method of core wire the following steps are included:
(1) choosing diameter is the pure calcium silk of 7mm as solid calcium core wire；
(2) it twists after taking the mild-carbon steel strip with a thickness of 1.0mm to coat the calcium core wire and is shaped to pipe；
(3) with high frequency induction welding connection by the jointing edge of above-mentioned pipe under atmosphere of inert gases in be closely welded on one
Rise, and the engaging portion after butt welding connects immediately carries out air-cooled or contactless water cooling, when HFI welding alternating current used
Frequency be 400KHz, 3.5 ° of meeting close angle of two edge of V-arrangement zone steel, V-arrangement section length be 14mm；The number of turns of induction coil used
It is 3, internal diameter 13mm, induction coil length is 11mm；1350 DEG C of welding temperature when HFI welding, amount of compression
0.5mm, speed of welding 40m/min；
(4) cut off welding position burr, then after shaped, stretch processing welding calcium core-spun yarn.
Embodiment 2: application method of the welding calcium core-spun yarn in molten steel in steel making (aluminium deoxidation steel grade), the process flow of use
Are as follows: terminated using molten iron pretreatment+converter smelting+LF furnace refining, the refining of first time feeding+RH furnace terminates, second of feeding+company
Casting.LF furnace after treatment, about 150t molten steel, Holo-Al content feed welding calcium packet described in embodiment 1 0.015% for the first time
200 meters/furnace of core wire, speed 110m/min react 4min, and argon flow is set as 15Nm3/min；After RH furnace refining treatment
Molten steel introduces the refining of RH furnace, second of feeding welding 200 meters/furnace of calcium core-spun yarn, and speed 110m/min reacts 4min.
Using above-mentioned application method, oxygen mass fraction total in the steel after refining can be controlled respectively to 9 × 106, in steel
Field trash is spherical shape mostly, and 9 microns of the maximum equivalent diameter of field trash rolls rear steel plate inspection qualification rate 100%；B type impurity
Grading overall reduction, 1 grade or less ratio account for 98%, and Control and Inclusion Removal level significantly improves, and greatly reduces because field trash causes
Quality problems, it is of that month because rejection rate caused by field trash is less than 0.08%.
Embodiment 3: application method of the welding calcium core-spun yarn in molten steel in steel making (silicon killed steel kind), the process flow of use
Are as follows: terminated using molten iron pretreatment+converter smelting+LF furnace refining, the refining of first time feeding+RH furnace terminates, second of feeding+company
Casting.LF furnace after treatment, about 80t molten steel feed welding 80 meters/furnace of calcium core-spun yarn, speed described in embodiment 1 for the first time
110m/min, reacts 4min, and argon flow is set as 15Nm3/min；The refining of LF furnace terminates molten steel and introduces the refining of RH furnace, second
Feeding welding 70 meters/furnace of calcium core-spun yarn, speed 110m/min react 4min.
Using above-mentioned application method, oxygen mass fraction total in the steel after refining can be controlled respectively to 9 × 106, and in steel
Field trash be mostly it is spherical, 9 microns of the maximum equivalent diameter of field trash rolls rear steel plate inspection qualification rate 99%；B type impurity
Grading overall reduction, 1 grade or less ratio account for 98%, and Control and Inclusion Removal level significantly improves, caused by greatly reducing because of field trash
Quality problems, it is of that month because rejection rate caused by field trash is less than 0.09%.
Embodiment 4: in the application example of steel mill, South Korea
In March, 2013 in the 320 tons of ladle applications of steel mill, South Korea, by welding calcium core-spun yarn described in embodiment 1 with 110m/
It is per ton to feed 1 meter in the speed feeding ladle inward flange one third radius to the region at center of min, react 4min, argon flow
It is set as 15Nm3/min；Comparative test is done with silicon-calcium wire under identical condition simultaneously.Test result shows to reach (referring to table 1)
To close or identical refining effect, silicon-calcium wire feeding 171g per ton is compared, uses feeding for welding calcium core-spun yarn of the present invention
Enter amount and reduce 68%, calcium recovery rate 28% improves 2.3 times compared to silicon-calcium wire recovery rate 12%.
1 present invention welding calcium core-spun yarn of table uses result in steel mill, South Korea
Embodiment 5: the application example of certain steel mill at home
In January, 2013 150 tons of ladle applications of certain steel mill at home, by welding calcium core-spun yarn described in embodiment 1 with 110m/
In the speed feeding molten steel of min, position is in region of the ladle inward flange one third radius to center, by 1 meter of amount per ton
Feeding, reacts 4min, and argon flow is set as 20Nm3/ min test result is average calcium recovery rate 34.30%, referring to table 2.
Certain steel mill uses result to 2 present invention welding calcium core-spun yarn of table at home
The equivalent replacement for changing each specific numerical parameter or material composition in above-described embodiment, can form
Multiple specific embodiments are common variation range of the invention, are no longer described in detail one by one herein.
Claims (4)
1. a kind of application method of welding calcium core-spun yarn in liquid steel refining, includes the following steps:
(1) it after molten steel is through LF furnace refining treatment, is fed with the wire-feeding velocity of 70~120m/min into molten steel with feeding wire machine
Calcium core-spun yarn is welded, feed quantity feeds 0.4m~1.0m by molten steel per ton by the molten steel of silicon deoxidation, per ton by the molten steel of aluminium deoxidation
Molten steel feeds 0.8m~1.5m；
The welding calcium core-spun yarn is to wrap up solid calcium core wire and the wire body that is formed by seamless welding steel shell, wire body diameter 8~
10mm, solid calcium core wire weigh 52~60g/m, and seamless welding steel shell weighs 180~230g/m；The preparation method of the welding calcium core-spun yarn
The following steps are included:
1. choosing diameter is the pure calcium silk of 5~9mm as solid calcium core wire；
2. twisting after taking the mild-carbon steel strip with a thickness of 1.0~1.5mm to coat the calcium core wire is shaped to pipe；
3. the jointing edge of above-mentioned pipe is closely welded together in atmosphere of inert gases with high frequency induction welding connection, and immediately
Air-cooled or contactless water cooling is carried out to the engaging portion after welding；The frequency of alternating current used is when HFI welding
350~430KHz, 2 °~4 ° of the meeting close angle of two edge of V-arrangement zone steel, V-arrangement section length are 1.3~1.6 times of pipe caliber；Institute
It is 2~3 with the number of turns of induction coil, internal diameter is 1.2~1.5 times of pipe caliber, and length is less than or equal to the internal diameter of itself,
More than or equal to pipe outer diameter；1250~1460 DEG C of welding temperature when HFI welding, welding amount of compression are that mild-carbon steel strip is thick
0.33~0.67 times of degree, 30~50m/min of speed of welding；
4. cut off solder bond position burr, then after shaped, stretch processing welding calcium core-spun yarn；
(2) 4~6min is reacted after feeding welding calcium core-spun yarn, while with 10~50m3The flow argon bottom-blowing of/min.
2. application method of the welding calcium core-spun yarn according to claim 1 in liquid steel refining, which is characterized in that described
In step (1), after molten steel reaches LF furnace, lime, refining slag and slag deoxidier is added and quickly makes white slag, makes to refine after slugging
Slag weight percent composition are as follows: dual alkalinity CaO/SiO2Control is in 5~10, TFe+MnO %≤4%, Al2O3% control 16~
29%, aluminum shot is added in molten steel or feeds the Holo-Al content in aluminum steel adjustment molten steel, LF furnace after treatment, full aluminium contains in molten steel
When amount is in 0.015%~0.040%, starts feeding welding calcium core-spun yarn, carry out Calcium treatment.
3. application method of the welding calcium core-spun yarn according to claim 1 in liquid steel refining, which is characterized in that described
After step (2), the molten steel after the refining of LF furnace is directly entered continuous casting working procedure or introduces RH furnace and further refined, and RH furnace is true
20~50min of time is managed in vacancy, and the processing time that wherein vacuum degree is 50~300Pa is 12~30min, is vacuum-treated Shi Butian
Add containing aluminium deoxidizer；Then the welding calcium is fed into molten steel with the wire-feeding velocity of 70~120m/min with feeding wire machine second
Core-spun yarn feeds 0.8m~1.5m by the molten steel of aluminium deoxidation molten steel per ton, and variety steel molten steel per ton feeds 1.2~1.6m.
4. application method of the welding calcium core-spun yarn according to claim 1 in liquid steel refining, which is characterized in that described
Step 1. in, processing first is passivated to solid calcium core wire outer surface:
At least one layer of passivator is uniformly coated in solid calcium core wire outer surface, and after 8~15min of standing, at 110~120 DEG C,
After dry 0.5~1h, that is, form passivation film；The passivator is pressed the weight ratio group of 4~6:1~2 by atoleine, soda ash
At.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2014/080276 WO2015192348A1 (en) | 2014-06-19 | 2014-06-19 | Welded calcium core wire and application method thereof in molten steel refining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106170566A CN106170566A (en) | 2016-11-30 |
| CN106170566B true CN106170566B (en) | 2019-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480076534.0A Expired - Fee Related CN106170566B (en) | 2014-06-19 | 2014-06-19 | Weld calcium core-spun yarn and its application method in liquid steel refining |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106170566B (en) |
| WO (1) | WO2015192348A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6053960A (en) * | 1997-12-30 | 2000-04-25 | Minerals Technologies, Inc. | Method of manufacture of cored wire for treating molten metal |
| CN102399938A (en) * | 2011-11-29 | 2012-04-04 | 东北大学 | Inclusion control method for rod and wire alloy steel |
| CN102417950A (en) * | 2011-11-28 | 2012-04-18 | 巩义市众鑫钙业有限公司 | Seamless calcium line and preparation method thereof |
| CN102748578A (en) * | 2012-07-09 | 2012-10-24 | 巩义市众鑫钙业有限公司 | Seamless ferroaluminum wire and preparation method thereof |
| CN202643742U (en) * | 2012-06-26 | 2013-01-02 | 巩义市众鑫钙业有限公司 | Seamless calcium iron wire |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5983711A (en) * | 1982-11-04 | 1984-05-15 | Hitachi Cable Ltd | Wire-shaped additive for steel and preparation thereof |
-
2014
- 2014-06-19 WO PCT/CN2014/080276 patent/WO2015192348A1/en active Application Filing
- 2014-06-19 CN CN201480076534.0A patent/CN106170566B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6053960A (en) * | 1997-12-30 | 2000-04-25 | Minerals Technologies, Inc. | Method of manufacture of cored wire for treating molten metal |
| CN102417950A (en) * | 2011-11-28 | 2012-04-18 | 巩义市众鑫钙业有限公司 | Seamless calcium line and preparation method thereof |
| CN102399938A (en) * | 2011-11-29 | 2012-04-04 | 东北大学 | Inclusion control method for rod and wire alloy steel |
| CN202643742U (en) * | 2012-06-26 | 2013-01-02 | 巩义市众鑫钙业有限公司 | Seamless calcium iron wire |
| CN102748578A (en) * | 2012-07-09 | 2012-10-24 | 巩义市众鑫钙业有限公司 | Seamless ferroaluminum wire and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106170566A (en) | 2016-11-30 |
| WO2015192348A1 (en) | 2015-12-23 |
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