CN106498139A - A kind of process for producing IF steel and device - Google Patents
A kind of process for producing IF steel and device Download PDFInfo
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- CN106498139A CN106498139A CN201611046991.2A CN201611046991A CN106498139A CN 106498139 A CN106498139 A CN 106498139A CN 201611046991 A CN201611046991 A CN 201611046991A CN 106498139 A CN106498139 A CN 106498139A
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- 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
- C21D8/0226—Hot rolling
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- 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
- C21D8/0236—Cold rolling
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- 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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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- 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
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- 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
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- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention provides a kind of process for producing IF steel and device, methods described includes：After control slab is heated to 1050～1250 DEG C, roughing is carried out to slab；Control roughing outlet temperature is not less than 880 DEG C；Entry temperature at finishing is controlled for 820～900 DEG C；Exit temperature at finishing is controlled for 780～880 DEG C；Coiling temperature is controlled for 560～700 DEG C, hot rolled plate is obtained；When carrying out cold rolling to the hot rolled plate, cold rolling reduction ratio is controlled for 70～90%；Wherein, the component of the IF steel includes Ti；Thus, the IF steel added using Ti, optimizes whole process hot rolling, cold rolling and parameter and annealing, using Low Temperature Finish, the IF steel of relatively low property anisotropy is obtained.
Description
Technical field
The invention belongs to smelting iron and steel technical field, more particularly to a kind of process for producing IF steel and device.
Background technology
IF steel is widely used in the stamping parts such as the automobile of production high performance requirements, the inside and outside plate of household electrical appliances because of excellent deep drawability.
IF steel mechanical properties have yield strength low, and elongation percentage is high, the characteristics of r values are high, ensure that steel plate has good formability
Energy.In order to obtain good synthesis forming property, need to ensure that IF steel plates have higher degree of purity, while ensureing rational whole process
Each production process.
The conventional IF steel technological process of productions are, after slab passes through heating, to carry out hot rolling roughing and essence in austenitic area
Roll, batch at relatively high temperatures；In the cold rolling process production phase, using big cold rolling reduction ratio, afterwards through high annealing, enter
And obtain excellent mechanical property.This method simply improves the r values of IF steel, but surrender of the IF steel on horizontal and vertical
Degree and Lankford r value differ greatly, i.e., it cannot be guaranteed that the anisotropy of IF Steel Properties.
This is based on, the present invention provides a kind of process for producing IF steel and device, of the prior art above-mentioned to solve
Problem.
Content of the invention
For the problem that prior art is present, a kind of process for producing IF steel and dress is embodiments provided
Put, for solving in prior art, during production IF steel, it is impossible to guarantee the anisotropic technical problem of IF Steel Properties.
The present invention provides a kind of process for producing IF steel, and methods described includes：
After control slab is heated to 1050～1250 DEG C, roughing is carried out to slab；
Control roughing outlet temperature is not less than 880 DEG C；
Entry temperature at finishing is controlled for 820～900 DEG C；
Exit temperature at finishing is controlled for 780～880 DEG C；
Coiling temperature is controlled for 560～700 DEG C, hot rolled plate is obtained；
When carrying out cold rolling to the hot rolled plate, cold rolling reduction ratio is controlled for 70～90%；Wherein, the group subpackage of the IF steel
Include Ti.
In such scheme, by heating of plate blank to after 1050～1250 DEG C, methods described also includes：2 are incubated to the slab
～5h.
In such scheme, the hot rolled plate is carried out cold rolling after, methods described also includes：
When annealing to the slab after cold rolling, annealing temperature is controlled for 720～810 DEG C, it is 0.2 control finishing elongation percentage
～1.5%.
In such scheme, when roughing is carried out to the slab, control roughing total reduction for 60～85%.
In such scheme, the component of the IF steel is specifically included：
C, its mass percent are 0～0.0030%；
Mn, its mass percent are 0.05～0.5%；
Al, its mass percent are 0.01～0.08%；
Ti, its mass percent are 0.01～0.09%；
Si, its mass percent are no more than 0.06%；
P, its mass percent are no more than 0.02%；
S, its mass percent are no more than 0.02%；
N, its mass percent are no more than 0.06%；Remaining group is divided into Fe.
The present invention also provides a kind of device for producing IF steel, and described device includes：
First control unit, is heated to 1050～1250 DEG C for controlling slab；
Second control unit, is not less than 880 DEG C for controlling roughing outlet temperature；
3rd control unit, for controlling entry temperature at finishing for 820～900 DEG C；
4th control unit, for controlling exit temperature at finishing for 780～880 DEG C；
5th control unit, for controlling coiling temperature for 560～700 DEG C, obtains hot rolled plate；
6th control unit, during for carrying out cold rolling to the hot rolled plate, controls cold rolling reduction ratio for 70～90%.
In such scheme, described device also includes：6th control unit, for the hot rolled plate is carried out cold rolling after, control
Annealing temperature processed is 720～810 DEG C.
In such scheme, the 6th control unit is additionally operable to control finishing elongation percentage for 0.2～1.5%.
In such scheme, second control unit is additionally operable to control roughing total reduction for 60～85%.
In such scheme, the component of the IF steel includes：
C, its mass percent are 0～0.0030%；
Mn, its mass percent are 0.05～0.5%；
Al, its mass percent are 0.01～0.08%；
Ti, its mass percent are 0.01～0.09%；
Si, its mass percent are no more than 0.06%；
P, its mass percent are no more than 0.02%；
S, its mass percent are no more than 0.02%；
N, its mass percent are no more than 0.06%；Remaining group is divided into Fe.
The invention provides a kind of process for producing IF steel and device, methods described includes：Control slab is heated to
After 1050～1250 DEG C, roughing is carried out to slab；Control roughing outlet temperature is not less than 880 DEG C；Controlling entry temperature at finishing is
820～900 DEG C；Exit temperature at finishing is controlled for 780～880 DEG C；Coiling temperature is controlled for 560～700 DEG C, hot rolled plate is obtained；
When carrying out cold rolling to the hot rolled plate, cold rolling reduction ratio is controlled for 70～90%；Wherein, the component of the IF steel includes Ti；Such as
This, the IF steel added using Ti optimizes whole process hot rolling, cold rolling and parameter and annealing, using Low Temperature Finish, obtains relatively low
The IF steel of property anisotropy.
Description of the drawings
Fig. 1 is the process schematic flow sheet of the production IF steel that the embodiment of the present invention one is provided；
Fig. 2 is the apparatus structure schematic diagram of the production IF steel that the embodiment of the present invention two is provided.
Specific embodiment
When IF steel is produced, in order to ensure the anisotropy of the IF Steel Properties, the invention provides a kind of production IF steel
Process and device, methods described includes：After control slab is heated to 1050～1250 DEG C, roughing is carried out to slab；Control
Roughing outlet temperature processed is not less than 880 DEG C；Entry temperature at finishing is controlled for 820～900 DEG C；Exit temperature at finishing is controlled for 780
～880 DEG C；Coiling temperature is controlled for 560～700 DEG C, hot rolled plate is obtained；When carrying out cold rolling to the hot rolled plate, cold rolling is controlled
Lower rate is 70～90%,；Wherein, the component of the IF steel includes Ti.
Technical scheme is described in further detail below by drawings and the specific embodiments.
Embodiment one
The present embodiment provides a kind of process for producing IF steel, as shown in figure 1, the method comprising the steps of：
Step 110, after control slab is heated to 1050～1250 DEG C, carries out roughing to slab.
In this step, before slab is heated, need to smelt the molten steel for meet IF steel constituents in a furnace, pass through
Continuous casting working procedure produces required slab.After slab has been produced, slab is carried out being heated to 1050～1250 DEG C, preferably temperature
1100～1200 DEG C of degree, and after being incubated 2～5h, roughing is carried out to slab.
Wherein, the component of the IF steel is specifically included：C, its mass percent are 0～0.0030%, it is therefore preferable to 0.010
～0.00280%；Mn, its mass percent are 0.05～0.5%, it is preferable that for 0.02～0.4%；Al, its mass percent
For 0.01～0.08%, it is preferable that for 0.02～0.6%；Ti, its mass percent are 0.01～0.09%, it is preferable that be
0.04～0.08%；Si, its mass percent are no more than 0.06%；P, its mass percent are no more than 0.02%；S, its
Mass percent is no more than 0.02%；N, its mass percent are no more than 0.06%；Remaining group is divided into Fe.
Step 111, control roughing outlet temperature are not less than 880 DEG C.
In this step, when carrying out roughing using roughing mill to slab, control slab is not less than in the outlet temperature of roughing mill
880℃.Also, in order to ensure that slab has enough deformations, roughing total reduction is controlled for 60～85%.
Step 112, controls entry temperature at finishing for 820～900 DEG C.
In this step, slab is carried out after roughing, need finish rolling to be carried out to slab, when slab enters finishing mill entrance,
Need to control board briquette for 820～900 DEG C, it is preferable that for 850～890 DEG C.
Step 113, controls exit temperature at finishing for 780～880 DEG C.
In this step, after to slab finish rolling, slab from finishing mill outlet out when, control slab temperature be 780～
880 DEG C, it is preferable that for 800～850 DEG C.
Step 114, controls coiling temperature for 560～700 DEG C, obtains hot rolled plate；
In this step, after finish rolling terminates, slab is batched, coiling temperature is controlled for 560～700 DEG C, obtain heat
Roll plate；Wherein, preferably coiling temperature is 600～680 DEG C.
Step 115, when carrying out cold rolling to the hot rolled plate, controls cold rolling reduction ratio for 70～90%.
In this step, after hot rolled plate is got, pickling and cold rolling is carried out to hot rolled plate, wherein it is desired to control cold rolling
Lower rate is 70～90%.
After carrying out cold rolling to hot rolled plate, cold rolling after steel plate carry out continuous annealing operation, in continuous annealing operation, control annealing temperature
Spend for 720～810 DEG C, preferably annealing temperature is 750～800 DEG C；Finishing elongation percentage is controlled for 0.2～1.5%.
The process of the production IF steel provided in the present embodiment, the IF steel that production is added using Ti optimize whole process heat
Roll, cold rolling and parameter and annealing, using Low Temperature Finish, obtain the IF steel of relatively low property anisotropy.
Embodiment two
Embodiment one is corresponded to, the present embodiment also provides a kind of device for producing IF steel, as shown in Fig. 2 described device bag
Include：First control unit 21, the second control unit 22, the 3rd control unit 23, the 4th control unit 24, the 5th control unit 25
And the 6th control unit 26；Wherein,
First control unit 21 is heated to 1050～1250 DEG C for controlling slab；Specifically, slab is being heated
Before, need to smelt the molten steel for meet IF steel constituents in a furnace, the slab needed for producing through continuous casting working procedure.When slab is given birth to
Produce good after, the control heating furnace of the first control unit 21 carries out being heated to 1050～1250 DEG C to slab, preferable temperature 1100～
1200 DEG C, and after being incubated 2～5h, roughing is carried out to slab.
Wherein, the component of the IF steel is specifically included：C, its mass percent are 0～0.0030%, it is therefore preferable to 0.010
～0.00280%；Mn, its mass percent are 0.05～0.5%, it is preferable that for 0.02～0.4%；Al, its mass percent
For 0.01～0.08%, it is preferable that for 0.02～0.6%；Ti, its mass percent are 0.01～0.09%, it is preferable that be
0.04～0.08%；Si, its mass percent are no more than 0.06%；P, its mass percent are no more than 0.02%；S, its
Mass percent is no more than 0.02%；N, its mass percent are no more than 0.06%；Remaining group is divided into Fe.
After heating to slab, roughing is carried out to slab, the second control unit 22 is used for controlling slab in roughing mill
Outlet temperature is not less than 880 DEG C；Also, in order to ensure that there is slab enough deformations, the second control unit 22 to be additionally operable to control
The total reduction of roughing mill is 60～85%.
After roughing is carried out to slab, also need to carry out finish rolling to slab, when slab enters finishing mill entrance, the 3rd control
Unit 23 needs to control board briquette for 820～900 DEG C, it is preferable that for 850～890 DEG C.
After to slab finish rolling, the 4th control unit 24 is used for controlling exit temperature at finishing for 780～880 DEG C；
Specifically, when slab from finishing mill outlet out when, the 4th control unit 24 control slab temperature be 780～
880 DEG C, it is preferable that for 800～850 DEG C.
5th control unit 25 is used for controlling coiling temperature for 560～700 DEG C, obtains hot rolled plate；Specifically, when finish rolling is tied
Shu Hou, batches to slab, controls coiling temperature for 560～700 DEG C, obtains hot rolled plate；Wherein, preferably coiling temperature is
600～680 DEG C.
When 6th control unit 26 is used for carrying out cold rolling to the hot rolled plate, cold rolling reduction ratio is controlled for 70～90%.Tool
Body ground, after hot rolled plate is got, carries out pickling and cold rolling to hot rolled plate, and wherein, the 6th control unit 26 needs to control cold rolling
Reduction ratio is 70～90%.
Further, after carrying out cold rolling to hot rolled plate, cold rolling after steel plate carry out continuous annealing operation, in continuous annealing operation,
6th control unit 26 controls annealing temperature for 720～810 DEG C, and preferably annealing temperature is 750～800 DEG C；Control finishing extends
Rate is 0.2～1.5%.
In practical application, the first control unit 21, the second control unit 22, the 3rd control unit 23, the 4th control unit
24th, the 5th control unit 25 and the 6th control unit 26 can be by central processing unit (CPU, the Central in the device
Processing Unit), digital signal processor (DSP, Digtal Signal Processor), programmable logic array
(FPGA, Field Programmable Gate Array), micro-control unit (MCU, Micro Controller Unit) are real
Existing
The device of the production IF steel provided in the present embodiment, the IF steel that production is added using Ti, optimization whole process hot rolling, cold
Roll and parameter and annealing, using Low Temperature Finish, obtain the IF steel of relatively low property anisotropy.
Embodiment three
During practical application, when the component of IF steel is as shown in table 1, when being produced to IF steel using conventional method, draw
IF steel mechanical properties as shown in table 2；When IF steel in the method table 1 provided using embodiment one is produced, the IF for drawing
Steel mechanical property is as shown in table 3；：
Table 1
| Sequence number | C | Si | Mn | P | S | Al | Ti | N |
| 1 | 0.0018 | 0.007 | 0.05 | 0.015 | 0.009 | 0.06 | 0.08 | 0.0026 |
Table 2
Table 3
Wherein, the Rp0.2 in table 2 and table 3 is Proof strength of non-proportional；Rm is tensile strength；N refers to for strain hardening
Number；A80 is one kind of elongation percentage, represents disproportional sample, and gauge length is 80mm.Elongation percentage δ is gauge length section after sample tension failure
Total deformation Δ L and the percent of the ratio of former gauge length L, can be calculated by formula (1)：
δ=Δ L/L × 100% (1)
Δ r can be calculated by formula (2)：
Δ r=(r0 °+r90 °)/2-r45 ° (2)
From table 2 it can be seen that when being produced to IF steel using conventional method, Δ r values are 0.65；From table 3 it can be seen that
When IF steel in the method table 1 provided using embodiment one is produced, Δ r values are 0.05；The side that embodiment one is provided is described
When IF steel in method table 1 is produced, the anisotropy of IF steel is relatively low.
During practical application, when the component of IF steel is as shown in table 4, it is utilized respectively in the method table 4 of the offer of embodiment one
When IF steel is produced, the IF steel mechanical properties for drawing are as shown in table 5；When being produced to IF steel using conventional method, draw
IF steel mechanical properties as shown in table 6：
Table 4
| Sequence number | C | Si | Mn | P | S | Al | Ti | N |
| 1 | 0.0020 | 0.006 | 0.15 | 0.018 | 0.006 | 0.035 | 0.05 | 0.0022 |
Table 5
Table 6
As can be seen from Table 5, when being produced to IF steel using conventional method, Δ r values are 0.73；As can be seen from Table 6,
When IF steel in the method table 4 provided using embodiment one is produced, Δ r values are 0.02；The side that embodiment one is provided is described
When IF steel in method table 1 is produced, the anisotropy of IF steel is relatively low.
During practical application, when the component of IF steel is as shown in table 7, when being produced to IF steel using conventional method, draw
IF steel mechanical properties as shown in table 8；When IF steel in the method table 7 provided using embodiment one is produced, the IF for drawing
Steel mechanical property is as shown in table 9：
Table 7
| Sequence number | C | Si | Mn | P | S | Al | Ti | N |
| 1 | 0.0025 | 0.008 | 0.14 | 0.020 | 0.008 | 0.05 | 0.09 | 0.0020 |
Table 8
Table 9
As can be seen from Table 8, when being produced to IF steel using conventional method, Δ r values are 0.65；As can be seen from Table 9,
When IF steel in the method table 7 provided using embodiment one is produced, Δ r values are 0.05；The side that embodiment one is provided is described
When IF steel in method table 1 is produced, the anisotropy of IF steel is relatively low.
The above, only presently preferred embodiments of the present invention is not intended to limit protection scope of the present invention, all
Any modification, equivalent and improvement for being made within the spirit and principles in the present invention etc., should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of process for producing IF steel, it is characterised in that methods described includes：
After control slab is heated to 1050～1250 DEG C, roughing is carried out to slab；
Control roughing outlet temperature is not less than 880 DEG C；
Entry temperature at finishing is controlled for 820～900 DEG C；
Exit temperature at finishing is controlled for 780～880 DEG C；
Coiling temperature is controlled for 560～700 DEG C, hot rolled plate is obtained；
When carrying out cold rolling to the hot rolled plate, cold rolling reduction ratio is controlled for 70～90%；Wherein, the component of the IF steel includes
Ti.
2. the method for claim 1, it is characterised in that by heating of plate blank to after 1050～1250 DEG C, methods described is also
Including：2～5h is incubated to the slab.
3. the method for claim 1, it is characterised in that the hot rolled plate is carried out cold rolling after, methods described also includes：
When annealing to the slab after cold rolling, control annealing temperature for 720～810 DEG C, control finishing elongation percentage be 0.2～
1.5%.
4. the method for claim 1, it is characterised in that when carrying out roughing to the slab, controls roughing total reduction
For 60～85%.
5. the method for claim 1, it is characterised in that the component of the IF steel is specifically included：
C, its mass percent are 0～0.0030%；
Mn, its mass percent are 0.05～0.5%；
Al, its mass percent are 0.01～0.08%；
Ti, its mass percent are 0.01～0.09%；
Si, its mass percent are no more than 0.06%；
P, its mass percent are no more than 0.02%；
S, its mass percent are no more than 0.02%；
N, its mass percent are no more than 0.06%；Remaining group is divided into Fe.
6. a kind of device for producing IF steel, it is characterised in that described device includes：
First control unit, is heated to 1050～1250 DEG C for controlling slab；
Second control unit, is not less than 880 DEG C for controlling roughing outlet temperature；
3rd control unit, for controlling entry temperature at finishing for 820～900 DEG C；
4th control unit, for controlling exit temperature at finishing for 780～880 DEG C；
5th control unit, for controlling coiling temperature for 560～700 DEG C, obtains hot rolled plate；
6th control unit, during for carrying out cold rolling to the hot rolled plate, controls cold rolling reduction ratio for 70～90%.
7. device as claimed in claim 6, it is characterised in that described device also includes：6th control unit, for described
Hot rolled plate carry out cold rolling after, control annealing temperature for 720～810 DEG C.
8. device as claimed in claim 7, it is characterised in that the 6th control unit be additionally operable to control finishing elongation percentage be
0.2～1.5%.
9. device as claimed in claim 6, it is characterised in that second control unit is additionally operable to control roughing total reduction
For 60～85%.
10. device as claimed in claim 6, it is characterised in that the component of the IF steel includes：
C, its mass percent are 0～0.0030%；
Mn, its mass percent are 0.05～0.5%；
Al, its mass percent are 0.01～0.08%；
Ti, its mass percent are 0.01～0.09%；
Si, its mass percent are no more than 0.06%；
P, its mass percent are no more than 0.02%；
S, its mass percent are no more than 0.02%；
N, its mass percent are no more than 0.06%；Remaining group is divided into Fe.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107497877A (en) * | 2017-06-02 | 2017-12-22 | 首钢总公司 | A kind of method for producing IF steel |
| CN111549290A (en) * | 2020-06-09 | 2020-08-18 | 首钢集团有限公司 | IF steel with high formability and preparation method thereof |
| CN112593142A (en) * | 2020-10-26 | 2021-04-02 | 邯郸钢铁集团有限责任公司 | Low-cost high-purity ultra-low carbon steel strip and production method thereof |
| CN114214560A (en) * | 2021-11-29 | 2022-03-22 | 马鞍山钢铁股份有限公司 | Steel plate material for thin-gauge deep drawing and preparation method of steel plate |
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