CN109252028A - A kind of production method of high-carbon saw blade cold-rolled strip - Google Patents
A kind of production method of high-carbon saw blade cold-rolled strip Download PDFInfo
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- CN109252028A CN109252028A CN201710569308.1A CN201710569308A CN109252028A CN 109252028 A CN109252028 A CN 109252028A CN 201710569308 A CN201710569308 A CN 201710569308A CN 109252028 A CN109252028 A CN 109252028A
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- bell furnace
- reduction ratio
- cold
- rolling
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- 241000763859 Dyckia brevifolia Species 0.000 title claims abstract description 18
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 26
- 238000000137 annealing Methods 0.000 claims abstract description 22
- 238000005096 rolling process Methods 0.000 claims abstract description 18
- 238000005554 pickling Methods 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000005097 cold rolling Methods 0.000 claims abstract description 8
- 238000003723 Smelting Methods 0.000 claims abstract description 7
- 238000009749 continuous casting Methods 0.000 claims abstract description 7
- 238000010792 warming Methods 0.000 claims description 20
- 238000004321 preservation Methods 0.000 claims description 12
- 238000002791 soaking Methods 0.000 claims description 12
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 4
- 238000005098 hot rolling Methods 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
Abstract
The present invention relates to a kind of production method of high-carbon saw blade cold-rolled strip, technical process includes that smelting molten steel, continuous casting, hot rolling, bell furnace are once annealed, coupled pickling and tandem mill rolls, bell furnace double annealing and reversable mill roll: specifically include: 1) ladle chemistry is controlled；2) hot-rolled process parameter controls: 3) parameter and annealing control of bell furnace: 4) reduction ratio control of coupled pickling and tandem mill operation of rolling cold rolling: 5) bell furnace double annealing process parameter control: 6) reversable mill rolls secondary reduction ratio control: the present invention is by adjusting technical process and parameter, cold-rolled strip belt phenomenon is eliminated, lumber recovery is improved；The yield strength difference of same coil of strip is less than 30MPa simultaneously, fully meets requirement.
Description
Technical field
The present invention relates to cold-rolled strip production technical field more particularly to a kind of producers of high-carbon saw blade cold-rolled strip
Method.
Background technique
With the competition of domestic and international steel market, market interest space is more and more next small, and cost pressure is got over
Come bigger.High-carbon saw blade is mainly used for making high speed saw blade with cold-rolled strip, is widely used in the industries such as machining, compares it
His cold rolling kind has compared with high added value, domestic at present to only have a small number of steel mill's productions such as Anshan iron and steel plant.
The processing route of production high-carbon saw blade steel is that hot rolled coil is directly delivered goods after coupled pickling and tandem mill rolls at present, but
Frequently break band in production, seriously affects lumber recovery；Cold-rolled strip overall performance produced is uneven simultaneously, same coil of strip
Yield strength maximum differs 200MPa or more (requirement is that the yield strength difference of same coil of strip is less than 50MPa), product matter
Amount is unable to satisfy requirement, therefore there is an urgent need to be improved.
Summary of the invention
The present invention provides a kind of production method of high-carbon saw blade cold-rolled strip, by adjusting technical process and parameter,
Cold-rolled strip belt phenomenon is eliminated, lumber recovery is improved；The yield strength difference of same coil of strip is less than 30MPa simultaneously, completely
Meet requirement.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of production method of high-carbon saw blade cold-rolled strip, process route are smelting molten steel, continuous casting, hot rolling, bell furnace
Primary annealing, coupled pickling and tandem mill rolling, bell furnace double annealing and reversable mill rolling: it specifically includes:
1) ladle chemistry controls: chemical component presses mass percentage are as follows: C 0.52%~0.70%, Si
0.17%~0.47%, Mn 0.80%~1.20%, P≤0.03%, S≤0.03%, remaining for Fe and inevitably it is miscellaneous
Matter；
2) hot-rolled process parameter controls:
Tapping temperature: 1190~1290 DEG C, roughing temperature: 1040~1140 DEG C, finishing temperature: 890~990 DEG C, curling
Temperature: 680~780 DEG C；
3) parameter and annealing control of bell furnace:
The time that 460 DEG C are warming up to from 200 DEG C is 3.0~5.5h, in 460 DEG C of soaking time 2h or more；It heats up from 460 DEG C
It is 5~7h to 670 DEG C of times, in 670 DEG C of heat preservation 15h or more；The time that 580 DEG C are cooled to from 670 DEG C is 2~4h, cooling
Enter after to 580 DEG C and is quickly cooled down；
4) reduction ratio control of coupled pickling and tandem mill operation of rolling cold rolling:
Reduction ratio control is 20%~36%；
5) bell furnace double annealing process parameter control:
The time that 460 DEG C are warming up to from 200 DEG C is 3.0~5.5h, in 460 DEG C of soaking time 2h or more；It heats up from 460 DEG C
It is 5~7h to 670 DEG C of times, in 670 DEG C of heat preservation 15h or more；The time that 580 DEG C are cooled to from 670 DEG C is 2~4h, cooling
Enter after to 580 DEG C and is quickly cooled down；
6) reversable mill rolls secondary reduction ratio control:
Secondary reduction ratio control is 50%~60%.
Compared with prior art, the beneficial effects of the present invention are:
1) by the method for the invention produce high-carbon saw blade significantly improved with cold-rolled strip lumber recovery, weld seam broken belt rate by
50% or more is reduced to zero, and the yield strength difference of same coil of strip is less than 30MPa, fully meets user demand；
2) waste product because of the disconnected band of weld seam and the generation of same coil of strip performance unevenness is greatly reduced, production cost is significantly reduced；
3) method is simple, easy to implement, and effect stability is controllable.
Specific embodiment
A kind of production method of high-carbon saw blade cold-rolled strip of the present invention, process route are smelting molten steel, continuous casting, heat
It rolls, bell furnace is once annealed, coupled pickling and tandem mill rolls, bell furnace double annealing and reversable mill roll: specifically including:
1) ladle chemistry controls: chemical component presses mass percentage are as follows: C 0.52%~0.70%, Si
0.17%~0.47%, Mn 0.80%~1.20%, P≤0.03%, S≤0.03%, remaining for Fe and inevitably it is miscellaneous
Matter；
2) hot-rolled process parameter controls:
Tapping temperature: 1190~1290 DEG C, roughing temperature: 1040~1140 DEG C, finishing temperature: 890~990 DEG C, curling
Temperature: 680~780 DEG C；
3) parameter and annealing control of bell furnace:
The time that 460 DEG C are warming up to from 200 DEG C is 3.0~5.5h, in 460 DEG C of soaking time 2h or more；It heats up from 460 DEG C
It is 5~7h to 670 DEG C of times, in 670 DEG C of heat preservation 15h or more；The time that 580 DEG C are cooled to from 670 DEG C is 2~4h, cooling
Enter after to 580 DEG C and is quickly cooled down；
4) reduction ratio control of coupled pickling and tandem mill operation of rolling cold rolling:
Reduction ratio control is 20%~36%；
5) bell furnace double annealing process parameter control:
The time that 460 DEG C are warming up to from 200 DEG C is 3.0~5.5h, in 460 DEG C of soaking time 2h or more；It heats up from 460 DEG C
It is 5~7h to 670 DEG C of times, in 670 DEG C of heat preservation 15h or more；The time that 580 DEG C are cooled to from 670 DEG C is 2~4h, cooling
Enter after to 580 DEG C and is quickly cooled down；
6) reversable mill rolls secondary reduction ratio control:
Secondary reduction ratio control is 50%~60%.
Following embodiment is implemented under the premise of the technical scheme of the present invention, gives detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
Not mentionleting alone bright is conventional method.
[embodiment 1]
The present embodiment produces a kind of high-carbon saw blade cold-rolled strip, and process route is smelting molten steel, continuous casting, hot rolling, bell-type
Furnace is once annealed, coupled pickling and tandem mill rolls, bell furnace double annealing and reversable mill roll；It specifically includes:
1) ladle chemistry controls: chemical component presses mass percentage are as follows: C 0.65%, Si 0.19%, Mn
1.10%, P 0.026%, S 0.014%, remaining is Fe and inevitable impurity；
2) hot-rolled process parameter controls:
Tapping temperature: 1200 DEG C, roughing temperature: 1050 DEG C, finishing temperature: 900 DEG C, coiling temperature: 690 DEG C；
3) parameter and annealing control of bell furnace:
The time that 460 DEG C are warming up to from 200 DEG C is 3h, in 460 DEG C of soaking time 3h；From 460 DEG C be warming up to 670 DEG C when
Between be 5h, in 670 DEG C of heat preservation 18h；The time that 580 DEG C are cooled to from 670 DEG C is 3h, is quickly cooled down after being cooled to 580 DEG C.
4) reduction ratio control of coupled pickling and tandem mill operation of rolling cold rolling:
For raw material slab with a thickness of 3.6mm, a rolling thickness is 2.3mm, and a reduction ratio is 36%；
5) bell furnace double annealing process parameter control:
The time that 460 DEG C are warming up to from 200 DEG C is 3h, in 460 DEG C of soaking time 3h；From 460 DEG C be warming up to 670 DEG C when
Between be 5h, in 670 DEG C of heat preservation 18h；The time that 580 DEG C are cooled to from 670 DEG C is 3h, is quickly cooled down after being cooled to 580 DEG C.
6) reversable mill rolls secondary reduction ratio control:
For slab with a thickness of 2.3mm, secondary rolling thickness is 1.08mm after once rolling, and a reduction ratio is 53%；
The present embodiment high-carbon saw blade cold-rolled strip produced, weld seam broken belt rate is zero, the yield strength of same coil of strip
26MPa is differed, user demand is fully met.
[embodiment 2]
The present embodiment produces a kind of high-carbon saw blade cold-rolled strip, and process route is smelting molten steel, continuous casting, hot rolling, bell-type
Furnace is once annealed, coupled pickling and tandem mill rolls, bell furnace double annealing and reversable mill roll；It specifically includes:
1) ladle chemistry controls: chemical component presses mass percentage are as follows: C 0.68%, Si 0.32%, Mn
1.17%, P 0.023%, S 0.021%, remaining is Fe and inevitable impurity；
2) hot-rolled process parameter controls:
Tapping temperature: 1210 DEG C, roughing temperature: 1060 DEG C, finishing temperature: 910 DEG C, coiling temperature: 700 DEG C；
3) parameter and annealing control of bell furnace:
The time that 460 DEG C are warming up to from 200 DEG C is 5h, in 460 DEG C of soaking time 2h；From 460 DEG C be warming up to 670 DEG C when
Between be 5.5h, in 670 DEG C of heat preservation 15h；The time that 580 DEG C are cooled to from 670 DEG C is 2h, will be entered after being cooled to 580 DEG C quick
It is cooling；
4) reduction ratio control of coupled pickling and tandem mill operation of rolling cold rolling:
For raw material slab with a thickness of 3.5mm, a rolling thickness is 2.6mm, and a reduction ratio is 25.7%；
5) bell furnace double annealing process parameter control:
The time that 460 DEG C are warming up to from 200 DEG C is 5h, in 460 DEG C of soaking time 2h；From 460 DEG C be warming up to 670 DEG C when
Between be 5.5h, in 670 DEG C of heat preservation 15h；The time that 580 DEG C are cooled to from 670 DEG C is 2h, is entered after being cooled to 580 DEG C quickly cold
But；
6) reversable mill rolls secondary reduction ratio control:
For slab with a thickness of 2.6mm, secondary rolling thickness is 1.1mm after once rolling, and a reduction ratio is 57.7%；
The present embodiment high-carbon saw blade cold-rolled strip produced, weld seam broken belt rate is zero, the yield strength of same coil of strip
27MPa is differed, user demand is fully met.
[embodiment 3]
The present embodiment produces a kind of high-carbon saw blade cold-rolled strip, and process route is smelting molten steel, continuous casting, hot rolling, bell-type
Furnace is once annealed, coupled pickling and tandem mill rolls, bell furnace double annealing and reversable mill roll；It specifically includes:
1) ladle chemistry controls: chemical component presses mass percentage are as follows: C 0.62%, Si 0.17%, Mn
0.92%, P 0.028%, S 0.028%, remaining is Fe and inevitable impurity；
2) hot-rolled process parameter controls:
Tapping temperature: 1270 DEG C, roughing temperature: 1080 DEG C, finishing temperature: 910 DEG C, coiling temperature: 740 DEG C；
3) parameter and annealing control of bell furnace:
The time that 460 DEG C are warming up to from 200 DEG C is 4.5h, in 460 DEG C of soaking time 3h；670 DEG C are warming up to from 460 DEG C
Time is 6.5h, in 670 DEG C of heat preservation 17h；The time that 580 DEG C are cooled to from 670 DEG C is 3.5h, fast quickly cooling after being cooled to 580 DEG C
But；
4) reduction ratio control of coupled pickling and tandem mill operation of rolling cold rolling:
For raw material slab with a thickness of 3.6mm, a rolling thickness is 2.8mm, and a reduction ratio is 22.2%；
5) bell furnace double annealing process parameter control:
The time that 460 DEG C are warming up to from 200 DEG C is 4h, in 460 DEG C of soaking time 3h；From 460 DEG C be warming up to 670 DEG C when
Between be 6h, in 670 DEG C of heat preservation 17h；The time that 580 DEG C are cooled to from 670 DEG C is 3h, enters after being cooled to 580 DEG C and is quickly cooled down；
6) reversable mill rolls secondary reduction ratio control:
For slab with a thickness of 2.7mm, secondary rolling thickness is 1.1mm after once rolling, and a reduction ratio is 59.3%；
The present embodiment high-carbon saw blade cold-rolled strip produced, weld seam broken belt rate is zero, the yield strength of same coil of strip
27MPa is differed, user demand is fully met.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (1)
1. a kind of production method of high-carbon saw blade cold-rolled strip, which is characterized in that process route is smelting molten steel, continuous casting, heat
It rolls, bell furnace is once annealed, coupled pickling and tandem mill rolls, bell furnace double annealing and reversable mill roll: specifically including:
1) ladle chemistry controls: chemical component presses mass percentage are as follows: and C 0.52%~0.70%, Si 0.17%~
0.47%, Mn 0.80%~1.20%, P≤0.03%, S≤0.03%, remaining is Fe and inevitable impurity；
2) hot-rolled process parameter controls:
Tapping temperature: 1190~1290 DEG C, roughing temperature: 1040~1140 DEG C, finishing temperature: 890~990 DEG C, coiling temperature:
680~780 DEG C；
3) parameter and annealing control of bell furnace:
The time that 460 DEG C are warming up to from 200 DEG C is 3.0~5.5h, in 460 DEG C of soaking time 2h or more；It is warming up to from 460 DEG C
670 DEG C of time is 5~7h, in 670 DEG C of heat preservation 15h or more；The time that 580 DEG C are cooled to from 670 DEG C is 2~4h, is cooled to
Enter after 580 DEG C and is quickly cooled down；
4) reduction ratio control of coupled pickling and tandem mill operation of rolling cold rolling:
Reduction ratio control is 20%~36%；
5) bell furnace double annealing process parameter control:
The time that 460 DEG C are warming up to from 200 DEG C is 3.0~5.5h, in 460 DEG C of soaking time 2h or more；It is warming up to from 460 DEG C
670 DEG C of time is 5~7h, in 670 DEG C of heat preservation 15h or more；The time that 580 DEG C are cooled to from 670 DEG C is 2~4h, is cooled to
Enter after 580 DEG C and is quickly cooled down；
6) reversable mill rolls secondary reduction ratio control:
Secondary reduction ratio control is 50%~60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710569308.1A CN109252028B (en) | 2017-07-13 | 2017-07-13 | Production method of cold-rolled steel strip for high-carbon saw blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710569308.1A CN109252028B (en) | 2017-07-13 | 2017-07-13 | Production method of cold-rolled steel strip for high-carbon saw blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109252028A true CN109252028A (en) | 2019-01-22 |
| CN109252028B CN109252028B (en) | 2020-02-18 |
Family
ID=65051085
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710569308.1A Active CN109252028B (en) | 2017-07-13 | 2017-07-13 | Production method of cold-rolled steel strip for high-carbon saw blade |
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|---|---|---|---|---|
| CN1888114A (en) * | 2005-06-29 | 2007-01-03 | 宝山钢铁股份有限公司 | Soft tin-plate and its making process |
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| CN102134681A (en) * | 2010-01-22 | 2011-07-27 | 宝山钢铁股份有限公司 | Steel for saw blade substrate and manufacturing method thereof |
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2017
- 2017-07-13 CN CN201710569308.1A patent/CN109252028B/en active Active
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