CN102676917A - Preparation method of cold-rolled sheet for flux-cored wire - Google Patents
Preparation method of cold-rolled sheet for flux-cored wire Download PDFInfo
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- CN102676917A CN102676917A CN2012101435478A CN201210143547A CN102676917A CN 102676917 A CN102676917 A CN 102676917A CN 2012101435478 A CN2012101435478 A CN 2012101435478A CN 201210143547 A CN201210143547 A CN 201210143547A CN 102676917 A CN102676917 A CN 102676917A
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Abstract
The invention discloses a preparation method of a cold-rolled sheet for a flux-cored wire, belonging to the field of processing of metal materials. The cold-rolled sheet comprises the following chemical components in percentage by mass: 0.005-0.045 percent of C, less than or equal to 0.03 percent of Si, 0.15-0.26 percent of Mn, less than or equal to 0.010 percent of P, less than or equal to 0.010 percent of S, less than or equal to 0.030 percent of Alt, less than or equal to 0.0030 percent of N and the balance of Fe. The method comprises the following steps of: performing hot rolling, acid washing and cold rolling in sequence on a steel billet to obtain a cold-rolled strip coil; and performing continuous annealing and flat processing methods. The cold-rolled sheet has the advantages of low yield strength, high tensile strength, excellent cold molding performance, excellent puling performance, high production speed, short period, high yield and high quality; and compared with the conventional process, the method has excellent advantages, and the use requirement of steel for the flux-cored wire can be better met.
Description
Technical field
The invention belongs to the metal material processing field, be specifically related to the preparation method of a kind of flux-cored wire with cold rolled sheet.
Background technology
Flux-cored wire is a kind of novel welding material that develops rapidly in recent years, and its production technique has three kinds: steel pipe method, steel band method, wire rod method.Steel band method cost is lower, and technical difficulty is also little, is the working method that generally adopts in the world.The method that the steel band method is produced flux-cored wire is by the circular steel pipe of thin steel coil strip, fills up the medicinal powder of certain ingredients simultaneously therein, forms through drawing.Flux-cored wire is also referred to as tubular wire; Can be through the kind and the ratio of adjustment medicine core additive; The adjustment that its alloying constituent can be flexible designs the welding material of various different purposes easily, because can't be smelted with rolling so many kinds of flux-cored wire are solid welding wires.Because the special preparation method of flux-cored wire requires flux-cored wire to have higher drawability and intensity with cold rolled sheet.
Though prior art discloses a kind of cold rolled strip and method of manufacture and a kind of steel for flux-cored wire jacket and working method thereof that is used for flux-cored wire, when two kinds of working methods are based on SPCC, 08Al band steel such as (or SPCD) and are used for flux-cored wire and make, there is problem such as unstable properties and the improvement made; Though these two kinds of methods have all improved the performance of flux-cored wire with steel; It is many to have solved tramp element content, and unit elongation is low, occur problems such as broken belt easily, but two kinds of methods all adopt single chassis rolling+the bell-type annealing explained hereafter; Technical process is complicated; Be that production yields poorly cold rolling or when annealing process is produced, all can not realize continuous production, the cycle is long; Efficient is low, and is incompatible with the market requirement that present flux-cored wire cold rolled strip consumption is explosive growth.
Summary of the invention
Technical problem to be solved by this invention provides the preparation method of the high and quantity-produced flux-cored wire of a kind of surface quality with cold rolled sheet.
For solving the problems of the technologies described above, the invention provides the preparation method of a kind of flux-cored wire with cold rolled sheet, comprise the steps:
With the chemical ingredients mass percent of its steel comprise C 0.005～0.045%, Si≤0.03%, Mn0.15～0.26%, P≤0.010%, S≤0.010%, Alt≤0.030, N≤0.0030%, surplus be the steel billet of Fe successively through hot rolling, pickling, obtain cold-rolled steel coils after cold rolling, behind continuous annealing peace finishing processing method, promptly get then.
Further, in said hot-rolled step, the hot-rolled process parameter of said steel billet is: Heating temperature is 1280 ± 20 ℃, and finishing temperature is 910 ± 20 ℃, and coiling temperature is 710 ± 20 ℃.
Further, in said acid pickling step, said acid cleaning process parameter is: free acid concentration is 50～55g/l in the acid tank, 75～90 ℃ of pickling temperatures, pickling speed 140～200m/min.
Further, in said cold rolling step, cold rolling employing 5 frames 6 roller CVC continuous-rollings, said cold rolling draft is 50-85%.
Further, behind said cold rolling step, during said cold-rolled steel coils thickness＜0.6mm, said continuous annealing method comprises the steps:
It is H that A gets into medium with said cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B is heated to 240-260 ℃ through 30-50 second;
C further is heated to 750-770 ℃ through 550-800 then second;
D is incubated 200-290 second then;
E is cooled to 650-670 ℃ through 60-80 then second;
F is cooled to 420-450 ℃ through 15-20 then second;
G then after 780-1100 is cooled to 360-400 ℃ second water-cooled to room temperature.
Preferably, behind said cold rolling step, during said cold-rolled steel coils thickness＜0.6mm, said continuous annealing method comprises the steps:
It is H that A gets into medium with said cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B was heated to 240 ℃ through 30 seconds;
C further was heated to 750 ℃ through 550 seconds then;
D is incubated 200 seconds then;
E was cooled to 650 ℃ through 60 seconds then;
F was cooled to 420 ℃ through 15 seconds then;
G then after being cooled to 360 ℃ in 780 seconds water-cooled to room temperature.
Preferably, behind said cold rolling step, during said cold-rolled steel coils thickness＜0.6mm, said continuous annealing method comprises the steps:
It is H that A gets into medium with said cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B was heated to 260 ℃ through 50 seconds;
C further was heated to 770 ℃ through 800 seconds then;
D is incubated 290 seconds then;
E was cooled to 670 ℃ through 80 seconds then;
F was cooled to 450 ℃ through 20 seconds then;
G then after being cooled to 400 ℃ in 1100 seconds water-cooled to room temperature.
Further, behind said cold rolling step, during said cold-rolled steel coils thickness >=0.6mm, said continuous annealing method comprises the steps:
It is H that A gets into medium with said cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B is heated to 240-260 ℃ through 30-50 second;
C further is heated to 770-790 ℃ through 550-800 then second;
D is incubated 200-290 second then;
E is cooled to 650-670 ℃ through 60-80 then second;
F is cooled to 420-450 ℃ through 15-20 then second;
G then after 780-1100 is cooled to 360-400 ℃ second water-cooled to room temperature.
Preferably, behind said cold rolling step, during said cold-rolled steel coils thickness >=0.6mm, said continuous annealing method comprises the steps:
It is H that A gets into medium with said cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B was heated to 240 ℃ through 30 seconds;
C further was heated to 770 ℃ through 550 seconds then;
D is incubated 200 seconds then;
E was cooled to 650 ℃ through 60 seconds then;
F was cooled to 420 ℃ through 15 seconds then;
G then after being cooled to 360 ℃ in 780 seconds water-cooled to room temperature.
Preferably, behind said cold rolling step, during said cold-rolled steel coils thickness >=0.6mm, said continuous annealing method comprises the steps:
It is H that A gets into medium with said cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B was heated to 260 ℃ through 50 seconds;
C further was heated to 790 ℃ through 800 seconds then;
D is incubated 290 seconds then;
E was cooled to 670 ℃ through 80 seconds then;
F was cooled to 450 ℃ through 20 seconds then;
G then after being cooled to 400 ℃ in 1100 seconds water-cooled to room temperature.
Further, in planarization step, said smooth unit elongation is 0.5～1.4%.
The cold rolled sheet preparation method that a kind of flux-cored wire provided by the invention is used; Take pickling cold continuous rolling and continuous annealing process production; Compare with bell-type annealing explained hereafter product with traditional single chassis is rolling; Not only have low yield strength, high-tensile, good cold forming capability and drawing property, and production rate is fast, the cycle is short, output is big, efficient is high.
Description of drawings
Metallographic structure figure after the cold rolled sheet that Fig. 1 uses for a kind of flux-cored wire that the embodiment of the invention provides is annealed.
Embodiment
Embodiment 1:
The cold rolled sheet that the present invention provides a kind of flux-cored wire to use, the trade mark are HS1, and the chemical ingredients mass percent of its steel is seen table 1:
Table 1 embodiment 1 adopts the steel billet chemical ingredients
| The trade mark | C | Si | Mn | P | S | Alt | N | Fe |
| HS1 | 0.020 | 0.03 | 0.15 | 0.010 | 0.010 | 0.030 | 0.0030 | All the other |
The preparation method of the cold rolled sheet that this flux-cored wire is used comprises the steps:
The steel billet that the chemical ingredients mass percent of its steel is as shown in table 1 promptly gets behind continuous annealing peace finishing processing method successively through hot rolling, pickling, obtain cold-rolled steel coils after cold rolling then.
Wherein, in hot-rolled step, the hot-rolled process parameter of steel billet is: 1282 ℃ of Heating temperatures, finishing temperature are 913 ℃, and coiling temperature is 715 ℃.
Wherein, in acid pickling step, the free acid concentration of 1# acid tank is controlled to be 50g/l, 75 ℃ of pickling temperatures, pickling speed 140m/min.
Wherein, in cold rolling step, cold rolling employing 5 frames 6 roller CVC continuous-rollings, cold rolling draft is 80%.
Wherein, behind cold rolling step, cold-rolled steel coils thickness finished product thickness is 0.5mm, and continuous annealing method comprises the steps:
It is H that A gets into medium with cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B was heated to 240 ℃ through 30 seconds;
C further was heated to 750 ℃ through 550 seconds then;
D is incubated 200 seconds then;
E was cooled to 650 ℃ through 60 seconds then;
F was cooled to 420 ℃ through 15 seconds then;
G then after being cooled to 360 ℃ in 780 seconds water-cooled to room temperature.
Wherein, smooth unit elongation adopts 0.6%, referring to Fig. 1, and the metallographic structure figure after the cold rolled sheet annealing that a kind of flux-cored wire that the embodiment of the invention provides is used, specific product object performance and surface quality are as shown in table 5.
Embodiment 2:
The cold rolled sheet that the present invention provides a kind of flux-cored wire to use, the trade mark are HS1, and the chemical ingredients mass percent of its steel is seen table 2:
Table 2 embodiment 2 adopts the steel billet chemical ingredients
| The trade mark | C | Si | Mn | P | S | Alt | N | Fe |
| HS1 | 0.020 | 0.03 | 0.15 | 0.010 | 0.010 | 0.030 | 0.0030 | All the other |
The preparation method of the cold rolled sheet that this flux-cored wire is used comprises the steps:
The steel billet that the chemical ingredients mass percent of its steel is as shown in table 2 promptly gets behind continuous annealing peace finishing processing method successively through hot rolling, pickling, obtain cold-rolled steel coils after cold rolling then.
Wherein, in hot-rolled step, the hot-rolled process parameter of steel billet is: 1293 ℃ of Heating temperatures, finishing temperature are 992 ℃, and coiling temperature is 720 ℃.
Wherein, in acid pickling step, the free acid concentration of 1# acid tank is controlled to be 55g/l, 90 ℃ of pickling temperatures, pickling speed 200m/min.
Wherein, in cold rolling step, cold rolling employing 5 frames 6 roller CVC continuous-rollings, cold rolling draft is 80%.
Wherein, behind cold rolling step, cold-rolled steel coils thickness finished product thickness is 0.5mm, and continuous annealing method comprises the steps:
It is H that A gets into medium with cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B was heated to 260 ℃ through 50 seconds;
C further was heated to 770 ℃ through 800 seconds then;
D is incubated 290 seconds then;
E was cooled to 670 ℃ through 80 seconds then;
F was cooled to 450 ℃ through 20 seconds then;
G then after being cooled to 400 ℃ in 1100 seconds water-cooled to room temperature.
Wherein, smooth unit elongation adopts 0.6%, and specific product object performance and surface quality are as shown in table 5.
Embodiment 3:
The cold rolled sheet that the present invention provides a kind of flux-cored wire to use, the trade mark are HS2, and the chemical ingredients mass percent of its steel is seen table 3:
Table 3 embodiment 3 adopts the steel billet chemical ingredients
| The trade mark | C | Si | Mn | P | S | Alt | N | Fe |
| HS2 | 0.040 | 0.03 | 0.26 | 0.010 | 0.010 | 0.030 | 0.0030 | All the other |
The preparation method of the cold rolled sheet that this flux-cored wire is used comprises the steps:
The steel billet that the chemical ingredients mass percent of its steel is as shown in table 3 promptly gets behind continuous annealing peace finishing processing method successively through hot rolling, pickling, obtain cold-rolled steel coils after cold rolling then.
Wherein, in hot-rolled step, the hot-rolled process parameter of steel billet is: 1273 ℃ of Heating temperatures, finishing temperature are 918 ℃, and coiling temperature is 695 ℃.
Wherein, in acid pickling step, the free acid concentration of 1# acid tank is controlled to be 50g/l, 75 ℃ of pickling temperatures, pickling speed 140m/min.
Wherein, in cold rolling step, cold rolling employing 5 frames 6 roller CVC continuous-rollings, cold rolling draft is 71%.
Wherein, behind cold rolling step, cold-rolled steel coils thickness finished product thickness is 1.0mm, and continuous annealing method comprises the steps:
It is H that A gets into medium with cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B was heated to 240 ℃ through 30 seconds;
C further was heated to 770 ℃ through 550 seconds then;
D is incubated 200 seconds then;
E was cooled to 650 ℃ through 60 seconds then;
F was cooled to 420 ℃ through 15 seconds then;
G then after being cooled to 360 ℃ in 780 seconds water-cooled to room temperature.
Wherein, smooth unit elongation adopts 1.2%, and specific product object performance and surface quality are as shown in table 5.
Embodiment 4:
The cold rolled sheet that the present invention provides a kind of flux-cored wire to use, the trade mark are HS2, and the chemical ingredients mass percent of its steel is seen table 4:
Table 4 embodiment 4 adopts the steel billet chemical ingredients
| The trade mark | C | Si | Mn | P | S | Alt | N | Fe |
| HS2 | 0.040 | 0.03 | 0.26 | 0.010 | 0.010 | 0.030 | 0.0030 | All the other |
The preparation method of the cold rolled sheet that this flux-cored wire is used comprises the steps:
The steel billet that the chemical ingredients mass percent of its steel is as shown in table 4 promptly gets behind continuous annealing peace finishing processing method successively through hot rolling, pickling, obtain cold-rolled steel coils after cold rolling then.
Wherein, in hot-rolled step, the hot-rolled process parameter of steel billet is: 1295 ℃ of Heating temperatures, finishing temperature are 924 ℃, and coiling temperature is 718 ℃.
Wherein, in acid pickling step, the free acid concentration of 1# acid tank is controlled to be 55g/l, 90 ℃ of pickling temperatures, pickling speed 200m/min.
Wherein, in cold rolling step, cold rolling employing 5 frames 6 roller CVC continuous-rollings, cold rolling draft is 71%.
Wherein, behind cold rolling step, cold-rolled steel coils thickness finished product thickness is 1.0mm, and continuous annealing method comprises the steps:
It is H that A gets into medium with cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B was heated to 260 ℃ through 50 seconds;
C further was heated to 790 ℃ through 800 seconds then;
D is incubated 290 seconds then;
E was cooled to 670 ℃ through 80 seconds then;
F was cooled to 450 ℃ through 20 seconds then;
G then after being cooled to 400 ℃ in 1100 seconds water-cooled to room temperature.
Wherein, smooth unit elongation adopts 1.2%, and specific product object performance and surface quality are as shown in table 5.
Table 5 product object performance and surface quality
Can find out that from table 5 steel plate that the present invention produced has lower ys 180～210MPa, advantages of higher tensile strength>=310MPa, little yield tensile ratio≤0.7; When belt steel thickness＜0.6mm, unit elongation A80>=39%, when belt steel thickness>=0.6mm, unit elongation A80>=40%; Product has good cold forming capability and drawing property simultaneously, surface quality all reach FC and more than, can better meet flux-cored wire and use the steel requirement.
Compare with existing technology; The flux-cored wire that adopts the inventive method to produce is used cold rolled sheet; Belt steel thickness homogeneity and surface quality are better; Do not have problems such as the uneven thickness, the strip steel that occur when single chassis is rolling produces with bell-type annealing are prone to cohere, surface quality generally can reach FC and more than, can satisfy better the higher high-end flux-cored wire of surperficial specification of quality is used the steel request for utilization.Particularly cold rolling after pickling, through strictness control acid strength, temperature and pickling speed, guarantee iron scale, iron powder and other impurity of belt steel surface are cleaned up, keep pickling speed stable during production, avoid owing pickling and overpickling.
It should be noted last that; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although with reference to instance the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the spirit and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (11)
1. a flux-cored wire is characterized in that with the preparation method of cold rolled sheet, comprises the steps:
With the chemical ingredients mass percent of its steel comprise C 0.005～0.045%, Si≤0.03%, Mn0.15～0.26%, P≤0.010%, S≤0.010%, Alt≤0.030, N≤0.0030%, surplus be the steel billet of Fe successively through hot rolling, pickling, obtain cold-rolled steel coils after cold rolling, behind continuous annealing peace finishing processing method, promptly get then.
2. preparation method according to claim 1 is characterized in that, in said hot-rolled step, the hot-rolled process parameter of said steel billet is: Heating temperature is 1280 ± 20 ℃, and finishing temperature is 910 ± 20 ℃, and coiling temperature is 710 ± 20 ℃.
3. preparation method according to claim 1 is characterized in that, in said acid pickling step, said acid cleaning process parameter is: free acid concentration is 50～55g/l in the acid tank, 75～90 ℃ of said pickling temperatures, said pickling speed 140～200m/min.
4. preparation method according to claim 1 is characterized in that, in said cold rolling step, and said cold rolling employing 5 frames 6 roller CVC continuous-rollings, said cold rolling draft is 50-85%.
5. preparation method according to claim 1 is characterized in that, behind said cold rolling step, during said cold-rolled steel coils thickness＜0.6mm, said continuous annealing method comprises the steps:
It is H that A gets into medium with said cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B is heated to 240-260 ℃ through 30-50 second;
C further is heated to 750-770 ℃ through 550-800 then second;
D is incubated 200-290 second then;
E is cooled to 650-670 ℃ through 60-80 then second; ,
F is cooled to 420-450 ℃ through 15-20 then second;
G then after 780-1100 is cooled to 360-400 ℃ second water-cooled to room temperature.
6. preparation method according to claim 5 is characterized in that, behind said cold rolling step, during said cold-rolled steel coils thickness＜0.6mm, said continuous annealing method comprises the steps:
It is H that A gets into medium with said cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B was heated to 240 ℃ through 30 seconds;
C further was heated to 750 ℃ through 550 seconds then;
D is incubated 200 seconds then;
E was cooled to 650 ℃ through 60 seconds then; ,
F was cooled to 420 ℃ through 15 seconds then;
G then after being cooled to 360 ℃ in 780 seconds water-cooled to room temperature.
7. preparation method according to claim 5 is characterized in that, behind said cold rolling step, during said cold-rolled steel coils thickness＜0.6mm, said continuous annealing method comprises the steps:
It is H that A gets into medium with said cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B was heated to 260 ℃ through 50 seconds;
C further was heated to 770 ℃ through 800 seconds then;
D is incubated 290 seconds then;
E was cooled to 670 ℃ through 80 seconds then;
F was cooled to 450 ℃ through 20 seconds then;
G then after being cooled to 400 ℃ in 1100 seconds water-cooled to room temperature.
8. preparation method according to claim 1 is characterized in that, behind said cold rolling step, during said cold-rolled steel coils thickness >=0.6mm, said continuous annealing method comprises the steps:
It is H that A gets into medium with said cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B is heated to 240-260 ℃ through 30-50 second;
C further is heated to 770-790 ℃ through 550-800 then second;
D is incubated 200-290 second then;
E is cooled to 650-670 ℃ through 60-80 then second; ,
F is cooled to 420-450 ℃ through 15-20 then second;
G then after 780-1100 is cooled to 360-400 ℃ second water-cooled to room temperature.
9. preparation method according to claim 8 is characterized in that, behind said cold rolling step, during said cold-rolled steel coils thickness >=0.6mm, said continuous annealing method comprises the steps:
It is H that A gets into medium with said cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B was heated to 240 ℃ through 30 seconds;
C further was heated to 770 ℃ through 550 seconds then;
D is incubated 200 seconds then;
E was cooled to 650 ℃ through 60 seconds then; ,
F was cooled to 420 ℃ through 15 seconds then;
G then after being cooled to 360 ℃ in 780 seconds water-cooled to room temperature.
10. preparation method according to claim 8 is characterized in that, behind said cold rolling step, during said cold-rolled steel coils thickness >=0.6mm, said continuous annealing method comprises the steps:
It is H that A gets into medium with said cold-rolled steel coils by room temperature
2And N
2In the non-oxidizing lehre of forming;
B was heated to 260 ℃ through 50 seconds;
C further was heated to 790 ℃ through 800 seconds then;
D is incubated 290 seconds then;
E was cooled to 670 ℃ through 80 seconds then; ,
F was cooled to 450 ℃ through 20 seconds then;
G then after being cooled to 400 ℃ in 1100 seconds water-cooled to room temperature.
11. preparation method according to claim 1 is characterized in that, in planarization step, said smooth unit elongation is 0.5～1.4%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436778A (en) * | 2013-08-23 | 2013-12-11 | 首钢总公司 | Cold-strip steel with low-temperature toughness for flux-cored wires and production method of cold-strip steel |
| CN104388652A (en) * | 2014-10-29 | 2015-03-04 | 攀钢集团江油长城特殊钢有限公司 | Manufacturing method of high-speed steel cold-rolled sheet and high-speed steel cold-rolled sheet |
| CN106636913A (en) * | 2016-09-29 | 2017-05-10 | 唐山钢铁集团有限责任公司 | Steel belt for flux-cored wire for ships and production method of steel belt |
| CN107937812A (en) * | 2017-11-27 | 2018-04-20 | 武汉钢铁有限公司 | High cleanliness flux-cored wire special steel strip and its manufacture method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102174683A (en) * | 2011-01-30 | 2011-09-07 | 首钢总公司 | Method for producing cold-rolling low-carbon aluminum killed steel with uniform through plate mechanical property |
| CN102416404A (en) * | 2011-09-21 | 2012-04-18 | 首钢总公司 | Method for producing cold-rolled steel strips |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102174683A (en) * | 2011-01-30 | 2011-09-07 | 首钢总公司 | Method for producing cold-rolling low-carbon aluminum killed steel with uniform through plate mechanical property |
| CN102416404A (en) * | 2011-09-21 | 2012-04-18 | 首钢总公司 | Method for producing cold-rolled steel strips |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436778A (en) * | 2013-08-23 | 2013-12-11 | 首钢总公司 | Cold-strip steel with low-temperature toughness for flux-cored wires and production method of cold-strip steel |
| CN104388652A (en) * | 2014-10-29 | 2015-03-04 | 攀钢集团江油长城特殊钢有限公司 | Manufacturing method of high-speed steel cold-rolled sheet and high-speed steel cold-rolled sheet |
| CN106636913A (en) * | 2016-09-29 | 2017-05-10 | 唐山钢铁集团有限责任公司 | Steel belt for flux-cored wire for ships and production method of steel belt |
| CN107937812A (en) * | 2017-11-27 | 2018-04-20 | 武汉钢铁有限公司 | High cleanliness flux-cored wire special steel strip and its manufacture method |
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|---|---|
| CN102676917B (en) | 2013-09-25 |
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Application publication date: 20120919 Assignee: BEIJING SHOUGANG COLD ROLLING THIN PLATE CO., LTD. Assignor: Capital Iron & Steel General Company Contract record no.: 2015990001019 Denomination of invention: Preparation method of cold-rolled sheet for flux-cored wire Granted publication date: 20130925 License type: Common License Record date: 20151209 |
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