CN102676917B - Preparation method of cold-rolled sheet for flux-cored wire - Google Patents

Preparation method of cold-rolled sheet for flux-cored wire Download PDF

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CN102676917B
CN102676917B CN 201210143547 CN201210143547A CN102676917B CN 102676917 B CN102676917 B CN 102676917B CN 201210143547 CN201210143547 CN 201210143547 CN 201210143547 A CN201210143547 A CN 201210143547A CN 102676917 B CN102676917 B CN 102676917B
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CN102676917A (en
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陈波
毕安园
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Shougang Group Co Ltd
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Shougang Corp
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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 0.010percent 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

A kind of flux-cored wire preparation method of cold rolled sheet
Technical field
The invention belongs to the metal material processing field, be specifically related to the preparation method that a kind of flux-cored wire is used 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 production 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 therein simultaneously, forms through drawing.Flux-cored wire is also referred to as tubular wire, can be by adjusting kind and the ratio of 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 for flux-cored wire and manufacture method and a kind of steel for flux-cored wire jacket and production method thereof, but two kinds of production methods are based on SPCC, 08Al(or SPCD) etc. band steel when being used for flux-cored wire and making, the improvement that has problems such as unstable properties and make, 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, unit elongation is low, problems such as broken belt appear easily, but two kinds of methods all adopt single chassis rolling+the bell-type annealing explained hereafter, the technical process complexity, be cold rolling or when annealing process is produced, all can not realize continuous production, production yields poorly, 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 a kind of surface quality height and quantity-produced flux-cored wire usefulness cold rolled sheet.
For solving the problems of the technologies described above, the invention provides a kind of flux-cored wire with the preparation method of 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, then behind continuous annealing peace finishing processing method namely.
Further, in described hot-rolled step, the hot-rolled process parameter of described steel billet is: Heating temperature is 1280 ± 20 ℃, and finishing temperature is 910 ± 20 ℃, and coiling temperature is 710 ± 20 ℃.
Further, in described acid pickling step, described 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 described cold rolling step, cold rolling employing 5 frames 6 roller CVC continuous-rollings, described cold rolling draft is 50-85%.
Further, behind described cold rolling step, during described cold-rolled steel coils thickness＜0.6mm, described continuous annealing method comprises the steps:
It is H that A enters medium with described cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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 described cold rolling step, during described cold-rolled steel coils thickness＜0.6mm, described continuous annealing method comprises the steps:
It is H that A enters medium with described cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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 described cold rolling step, during described cold-rolled steel coils thickness＜0.6mm, described continuous annealing method comprises the steps:
It is H that A enters medium with described cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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 described cold rolling step, during described cold-rolled steel coils thickness 〉=0.6mm, described continuous annealing method comprises the steps:
It is H that A enters medium with described cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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 described cold rolling step, during described cold-rolled steel coils thickness 〉=0.6mm, described continuous annealing method comprises the steps:
It is H that A enters medium with described cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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 described cold rolling step, during described cold-rolled steel coils thickness 〉=0.6mm, described continuous annealing method comprises the steps:
It is H that A enters medium with described cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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, described 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 invention provides the cold rolled sheet that a kind of flux-cored wire is used, the trade mark is HS1, and the chemical ingredients mass percent of its steel sees 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 is successively through hot rolling, pickling, obtain cold-rolled steel coils after cold rolling, then behind continuous annealing peace finishing processing method namely.
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 enters medium with cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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 invention provides the cold rolled sheet that a kind of flux-cored wire is used, the trade mark is HS1, and the chemical ingredients mass percent of its steel sees 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 is successively through hot rolling, pickling, obtain cold-rolled steel coils after cold rolling, then behind continuous annealing peace finishing processing method namely.
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 enters medium with cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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 invention provides the cold rolled sheet that a kind of flux-cored wire is used, the trade mark is HS2, and the chemical ingredients mass percent of its steel sees 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 is successively through hot rolling, pickling, obtain cold-rolled steel coils after cold rolling, then behind continuous annealing peace finishing processing method namely.
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 enters medium with cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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 invention provides the cold rolled sheet that a kind of flux-cored wire is used, the trade mark is HS2, and the chemical ingredients mass percent of its steel sees 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 is successively through hot rolling, pickling, obtain cold-rolled steel coils after cold rolling, then behind continuous annealing peace finishing processing method namely.
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 enters medium with cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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
Figure BDA00001619446400091
As can be seen from Table 5, the steel plate that the present invention produces has lower yield strength 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 steel requirement.
Compare with existing technology, the flux-cored wire cold rolled sheet that adopts the inventive method to produce, belt steel thickness homogeneity and surface quality are better, there are not problems such as the uneven thickness, the strip steel that occur when single chassis is rolling produces with bell-type annealing easily cohere, surface quality generally can reach FC and more than, can satisfy the high-end flux-cored wire steel service requirements higher to surperficial specification of quality better.Particularly cold rolling after pickling, by 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 example the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (9)

1. the preparation method of a flux-cored wire usefulness cold rolled sheet is characterized in that, comprises the steps:
With the chemical ingredients mass percent of its steel comprise C0.005～0.045%, 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, then behind continuous annealing peace finishing processing method namely;
Behind described cold rolling step, during described cold-rolled steel coils thickness＜0.6mm, described continuous annealing method comprises the steps:
It is H that A enters medium with described cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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;
Behind described cold rolling step, during described cold-rolled steel coils thickness 〉=0.6mm, described continuous annealing method comprises the steps:
It is H that A enters medium with described cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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.
2. preparation method according to claim 1 is characterized in that, in described hot-rolled step, the hot-rolled process parameter of described 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 described acid pickling step, described acid cleaning process parameter is: free acid concentration is 50～55g/l in the acid tank, 75～90 ℃ of described pickling temperatures, described pickling speed 140～200m/min.
4. preparation method according to claim 1 is characterized in that, in described cold rolling step, and described cold rolling employing 5 frames 6 roller CVC continuous-rollings, described cold rolling draft is 50-85%.
5. preparation method according to claim 1 is characterized in that, behind described cold rolling step, during described cold-rolled steel coils thickness＜0.6mm, described continuous annealing method comprises the steps:
It is H that A enters medium with described cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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.
6. preparation method according to claim 1 is characterized in that, behind described cold rolling step, during described cold-rolled steel coils thickness＜0.6mm, described continuous annealing method comprises the steps:
It is H that A enters medium with described cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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.
7. preparation method according to claim 1 is characterized in that, behind described cold rolling step, during described cold-rolled steel coils thickness 〉=0.6mm, described continuous annealing method comprises the steps:
It is H that A enters medium with described cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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.
8. preparation method according to claim 1 is characterized in that, behind described cold rolling step, during described cold-rolled steel coils thickness 〉=0.6mm, described continuous annealing method comprises the steps:
It is H that A enters medium with described cold-rolled steel coils by room temperature 2And N 2In the non-oxidizing annealing furnace 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.
9. preparation method according to claim 1 is characterized in that, in planarization step, described smooth unit elongation is 0.5～1.4%.
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Record date: 20151209

LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model
CP01 Change in the name or title of a patent holder

Address after: 100041 Shijingshan Road, Beijing, No. 68, No.

Patentee after: Shougang Group Co. Ltd.

Address before: 100041 Shijingshan Road, Beijing, No. 68, No.

Patentee before: Capital Iron & Steel General Company

CP01 Change in the name or title of a patent holder