CN109652625A - A kind of automotive window super high tensile cold-rolled steel plate manufacturing process - Google Patents
A kind of automotive window super high tensile cold-rolled steel plate manufacturing process Download PDFInfo
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- CN109652625A CN109652625A CN201910036896.1A CN201910036896A CN109652625A CN 109652625 A CN109652625 A CN 109652625A CN 201910036896 A CN201910036896 A CN 201910036896A CN 109652625 A CN109652625 A CN 109652625A
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
-
- 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
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
-
- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
Abstract
The invention discloses a kind of automotive window super high tensile cold-rolled steel plate manufacturing process, comprising the following steps: cold-rolled steel sheet is made in substrate of steel plate is successively heated, hot-rolled process processing, then cold rolling process processing；Cold-rolled steel sheet obtained is kept the temperature at 780~880 DEG C, with the speed of 10~30 DEG C/s with being cooled to 700~750 DEG C, is then cooled to 550~640 DEG C with 60~200 DEG C/s, 500 DEG C/s is then greater than with cooling rate and is cooled to 100 DEG C or less；Will treated cold-rolled steel sheet is heated to 150~250 DEG C, after being tempered 60~300s, then with weak acid pickling processes；By treated, cold-rolled steel sheet carries out smooth processing, and super high tensile cold-rolled steel plate is made.The super high tensile cold-rolled steel plate manufactured using present invention process, with saving shape correction cost, the advantages that bigger yield strength, tensile strength, sufficient flatness, while the raising of manufacturing when also helping manufacture automotive window and the raising of the qualities such as dimensional accuracy.
Description
Technical field
The present invention relates to cold-rolled steel sheet fields more particularly to a kind of automotive window to manufacture work with super high tensile cold-rolled steel plate
Skill.
Background technique
Cold rolling is to carry out rolling at normal temperature below recrystallization temperature, cold-rolled steel sheet using hot-rolled sheet coil as raw material
It is exactly by the steel plate of cold rolling process production, abbreviation cold plate.The thickness of cold-reduced sheet is usually most work between 0.1-8.0mm
The cold-rolled steel sheet thickness of factory's production is 4.5mm hereinafter, thickness, the width of cold-reduced sheet are capacity of equipment and the market according to each factory
Demand and determine.
Cold-rolled steel sheet has many uses, such as automobile manufacture, electric product, rolling stock, aviation, precision instrument, canned food
Deng.Currently, the main direction of development of automobile increasingly focuses on energy saving and safety.Therefore, while strengthening oil consumption limitation,
Energetically require the lightweight to body of a motor car.The best approach for reducing car weight is using high-strength steel sheet, to reduce steel plate
Use thickness.On the other hand, the dent resistance and impact strength that automobile can be also improved using high-strength steel sheet, increase vapour
The service life and safety of vehicle.
But just further strengthened for the requirement of body lightening, it is studying by using higher than 1180MPa grades
The sheet metal of intensity makes the further lightweight of vehicle body.Usually as the method for the intensity for improving sheet metal, make in metal structure
It is effectively, in particular, in order to realize high intensity with the additive amount of less alloying component, to make metal group comprising martensitic phase
It is effective for being woven to martensite single phase.Moreover, the martensite single phase structure steel plate can also save alloying component.
Meanwhile many automotive window cold-rolled steel sheet manufacturing technologies do not consider steel plate tissue to stretch flangeability etc. now
The influence that mechanical property generates.Wherein, it for tensile strength is the high-strength steel sheet of 1320MPa or more, needs high
Rolling loads are unable to get sufficient shape correction effect with existing rolling equipment.Moreover, the table for the existing cold-rolled steel sheet having
Face is perishable, and automotive window is used for vehicle outer side, and vulnerable to external environment influence, service life is short.
Therefore, the present invention is to complete in view of the above problems, it is intended that the steel by selecting reasonable component proportion
Plate substrate and inhibit when the quenching in continuous annealing plate profile to be deteriorated in itself not need correction to provide and reform, flatness is high
Automotive window super high tensile cold-rolled steel plate manufacturing process.
Summary of the invention
Inventor solves the above problem present in the prior art, has been repeated in-depth study.The present invention mentions
It has supplied one kind not need correction to reform, with the high strong cold-rolled steel sheet of automotive window superelevation of flatness, stretch-resistance, surrender degree
Manufacturing process.
To achieve the above object, the invention adopts the following technical scheme:
The present invention provides a kind of automotive window super high tensile cold-rolled steel plate manufacturing process, comprising the following steps:
(1) substrate of steel plate is successively heated, hot-rolled process processing, is made hot rolled steel plate；
(2) hot rolled steel plate obtained in step (1) is passed through into cold-rolling treatment, cold-rolled steel sheet is made；
(3) cold-rolled steel sheet obtained in step (2) is kept the temperature at 780~880 DEG C, is cooled down with the speed of 10~30 DEG C/s
To 700~750 DEG C, 550~640 DEG C then are cooled to 60~200 DEG C/s, 500 DEG C/s is then greater than with cooling rate and is cooled to 100
DEG C or less；
(4) by step (3) treated cold-rolled steel sheet is heated to 150~250 DEG C, after being tempered 60~300s, then use weak acid
Pickling processes；
(5) step (4) treated cold-rolled steel sheet is subjected to smooth processing, super high tensile cold-rolled steel plate is made.
Preferably, by weight percentage, substrate of steel plate described in step (1) includes following components: C 0.05~
0.40%, Si≤2.0%, Mn 1.0~3.0%, P≤0.05%, S≤0.02%, Ti≤0.1%, Nb≤0.20%, Al
0.01~0.05%, N≤0.005%, surplus is by Fe and inevitable impurity.
Preferably, by weight percentage, substrate of steel plate described in step (1) includes following components: C 0.05~
0.40%, 1.0~2.0% Si, Mn 1.5~3.0%, P 0.01~0.04%, S 0.010~0.015%, Ti 0.02~
0.08%, Nb 0.1~0.2%, Al 0.02~0.05%, N 0.001~0.005%, surplus by Fe and inevitably it is miscellaneous
Matter.
Preferably, hot rolling technology described in the step (1) are as follows: 830~930 DEG C of finishing temperature, coiling temperature 550~
650℃。
Preferably, the reduction ratio of cold-rolling treatment described in the step (2) is 60~80%.
Preferably, the compression ratio of the smooth processing of cold-rolled steel sheet described in the step (5) is 0~0.6%.
The present invention by adopting the above technical scheme, compared with prior art, has the following technical effect that
The present invention is a kind of automotive window super high tensile cold-rolled steel plate manufacturing process, and reasonable component proportion facilitates
The raising of manufacturing in the processes such as continuous annealing, and extremely facilitate to cut down the shape correction in the way of temper rolling etc.
Cost, also can be applied to the tensile strength for being not easy to carry out shape correction be 1320MPa or more ultrahigh-strength steel plates.And
And the present invention is also deteriorated in itself and can be had to stably obtain by plate profile when the quenching in inhibition continuous annealing process
The super high tensile cold-rolled steel plate of sufficient flatness.
Specific embodiment
The present invention is described in more detail below by specific embodiment, for a better understanding of the present invention,
But following embodiments are not intended to limit the scope of the invention.
Embodiment 1
Substrate of steel plate in the present embodiment, by weight percentage, including following components: C:0.3%, Si:1.6%,
Mn:2.3%, P:0.02%, S:0.012%, Ti:0.07%, Nb:0.16%, Al:0.03%, N:0.004%, Cu:
0.16%, surplus is by Fe and inevitable impurity.
In the embodiment, automotive window super high tensile cold-rolled steel plate manufacturing process the following steps are included:
(1) substrate of steel plate is successively heated, hot-rolled process processing, is made hot rolled steel plate；Wherein, finishing temperature 860
DEG C, coiling temperature is 610 DEG C；
(2) it is 68% cold-rolling treatment through reduction ratio by hot rolled steel plate obtained in step (1), cold-rolled steel sheet is made；
(3) cold-rolled steel sheet obtained in step (2) is kept the temperature at 820 DEG C, with the speed of 16 DEG C/s with being cooled to 735 DEG C,
Then 600 DEG C are cooled to 130 DEG C/s, are then cooled to 90 DEG C with 570 DEG C/s of cooling rate；
(4) by step (3) treated cold-rolled steel sheet is heated to 200 DEG C, after being tempered 130s, then with weak acid pickling processes；
(5) step (4) treated cold-rolled steel sheet is subjected to the smooth processing that compression ratio is 0.28%, superhigh intensity is made
Cold-rolled steel sheet.
Embodiment 2
Substrate of steel plate in the present embodiment, by weight percentage, C:0.35%, Si:1.8%, Mn:1.8%, P:
0.03%, S:0.012%, Ti:0.05%, Nb:0.13%, Al:0.04%, N:0.003%, Cu:0.18%, surplus by Fe and
Inevitable impurity is constituted.
In the embodiment, automotive window super high tensile cold-rolled steel plate manufacturing process the following steps are included:
(1) substrate of steel plate is successively heated, hot-rolled process processing, is made hot rolled steel plate；Wherein, finishing temperature 880
DEG C, coiling temperature is 640 DEG C；
(2) it is 74% cold-rolling treatment through reduction ratio by hot rolled steel plate obtained in step (1), cold-rolled steel sheet is made；
(3) cold-rolled steel sheet obtained in step (2) is kept the temperature at 840 DEG C, with the speed of 18 DEG C/s with being cooled to 720 DEG C,
Then 580 DEG C are cooled to 155 DEG C/s, are then cooled to 80 DEG C with 610 DEG C/s of cooling rate；
(4) by step (3) treated cold-rolled steel sheet is heated to 210 DEG C, after being tempered 150s, then with weak acid pickling processes；
(5) step (4) treated cold-rolled steel sheet is subjected to the smooth processing that compression ratio is 0.23%, superhigh intensity is made
Cold-rolled steel sheet.
Embodiment 3
Substrate of steel plate in the present embodiment, by weight percentage, C:0.32%, Si:1.5%, Mn:2.0%, P:
0.03%, S:0.013%, Ti:0.06%, Nb:0.17%, Al:0.03%, N:0.004%, Cu:0.15%, surplus by Fe and
Inevitable impurity is constituted.
In the embodiment, automotive window super high tensile cold-rolled steel plate manufacturing process the following steps are included:
(1) substrate of steel plate is successively heated, hot-rolled process processing, is made hot rolled steel plate；Wherein, finishing temperature 900
DEG C, coiling temperature is 580 DEG C；
(2) it is 70% cold-rolling treatment through reduction ratio by hot rolled steel plate obtained in step (1), cold-rolled steel sheet is made；
(3) cold-rolled steel sheet obtained in step (2) is kept the temperature at 830 DEG C, with the speed of 23 DEG C/s with being cooled to 710 DEG C,
Then 620 DEG C are cooled to 100 DEG C/s, are then cooled to 85 DEG C with 530 DEG C/s of cooling rate；
(4) by step (3) treated cold-rolled steel sheet is heated to 180 DEG C, after being tempered 200s, then with weak acid pickling processes；
(5) step (4) treated cold-rolled steel sheet is subjected to the smooth processing that compression ratio is 0.20%, superhigh intensity is made
Cold-rolled steel sheet.
The cold-rolled steel sheet that embodiment 1, embodiment 2, embodiment 3 are prepared carries out tensile strength, yield strength, extension
The performance test of rate.Specific data are as shown in table 1.
The performance test data table of 1 embodiment 1 of table, embodiment 2, embodiment 3
Comparative example is Chinese invention patent (CN201110418923.5): a kind of superhigh intensity cold rolling automobile steel in table 1
Plate and its production method.According to data in table 1, the super high tensile cold-rolled steel plate of 1-3 of embodiment of the present invention manufacture and comparison
The made steel plate of example is compared, and yield strength of the present invention, tensile strength and elongation percentage are higher.
In conclusion the present invention also has the cost for saving shape correction, bigger intensity, sufficient flatness etc. are excellent
Point, while also helping the raising of the qualities such as the raising of manufacturing and dimensional accuracy when manufacture automobile triangular vehicle window panel.
Specific embodiments of the present invention are described in detail above, but it is merely an example, the present invention is simultaneously unlimited
It is formed on particular embodiments described above.To those skilled in the art, any couple of present invention carries out equivalent modifications and
Substitution is also all among scope of the invention.Therefore, without departing from the spirit and scope of the invention made by equal transformation and
Modification, all should be contained within the scope of the invention.
Claims (6)
1. a kind of automotive window super high tensile cold-rolled steel plate manufacturing process, which comprises the following steps:
(1) substrate of steel plate is successively heated, hot-rolled process processing, is made hot rolled steel plate；
(2) hot rolled steel plate obtained in step (1) is passed through into cold-rolling treatment, cold-rolled steel sheet is made；
(3) cold-rolled steel sheet obtained in step (2) is kept the temperature at 780~880 DEG C, with the speed of 10~30 DEG C/s with being cooled to
700~750 DEG C, 550~640 DEG C then are cooled to 60~200 DEG C/s, 500 DEG C/s is then greater than with cooling rate and is cooled to 100 DEG C
Below；
(4) by step (3) treated cold-rolled steel sheet is heated to 150~250 DEG C, after being tempered 60~300s, then with weak acid pickling
Processing；
(5) step (4) treated cold-rolled steel sheet is subjected to smooth processing, super high tensile cold-rolled steel plate is made.
2. automotive window according to claim 1 super high tensile cold-rolled steel plate manufacturing process, which is characterized in that by weight
Percentages, substrate of steel plate described in step (1) includes following components: C 0.05~0.40%, Si≤2.0%, and Mn 1.0~
3.0%, P≤0.05%, S≤0.02%, Ti≤0.1%, Nb≤0.20%, Al 0.01~0.05%, N≤0.005%, it is remaining
Amount is by Fe and inevitable impurity.
3. automotive window according to claim 2 super high tensile cold-rolled steel plate manufacturing process, which is characterized in that by weight
Percentages, substrate of steel plate described in step (1) includes following components: C 0.05~0.40%, Si 1.0~2.0%, Mn
1.5~3.0%, P 0.01~0.04%, S 0.010~0.015%, Ti 0.02~0.08%, Nb 0.1~0.2%, Al
0.02~0.05%, N 0.001~0.005%, surplus is by Fe and inevitable impurity.
4. automotive window according to claim 1 super high tensile cold-rolled steel plate manufacturing process, which is characterized in that the step
Suddenly hot rolling technology described in (1) are as follows: 830~930 DEG C of finishing temperature, 550~650 DEG C of coiling temperature.
5. automotive window according to claim 1 super high tensile cold-rolled steel plate manufacturing process, which is characterized in that the step
Suddenly the reduction ratio of cold-rolling treatment described in (2) is 60~80%.
6. automotive window according to claim 1 super high tensile cold-rolled steel plate manufacturing process, which is characterized in that the step
Suddenly the compression ratio of the smooth processing of cold-rolled steel sheet described in (5) is 0~0.6%.
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| CN201910036896.1A CN109652625B (en) | 2019-01-15 | 2019-01-15 | Manufacturing process of ultrahigh-strength cold-rolled steel plate for automobile window |
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| CN201910036896.1A CN109652625B (en) | 2019-01-15 | 2019-01-15 | Manufacturing process of ultrahigh-strength cold-rolled steel plate for automobile window |
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| CN109652625B CN109652625B (en) | 2021-02-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111518997A (en) * | 2020-06-01 | 2020-08-11 | 宁波瑞国精机工业有限公司 | Machining process of anti-skid flange nut |
| CN113201694A (en) * | 2021-04-09 | 2021-08-03 | 唐山钢铁集团有限责任公司 | Production method of cold-rolled low-carbon steel with high corrosion resistance |
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| JPH07197183A (en) * | 1993-12-29 | 1995-08-01 | Kobe Steel Ltd | Ultra-high strength thin steel sheet without developing hydrogen brittleness and its production |
| CN1386139A (en) * | 2000-09-12 | 2002-12-18 | 日本钢管株式会社 | Super high tensile cold-rolled steel plate and method for production thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111518997A (en) * | 2020-06-01 | 2020-08-11 | 宁波瑞国精机工业有限公司 | Machining process of anti-skid flange nut |
| CN113201694A (en) * | 2021-04-09 | 2021-08-03 | 唐山钢铁集团有限责任公司 | Production method of cold-rolled low-carbon steel with high corrosion resistance |
| CN113201694B (en) * | 2021-04-09 | 2022-06-10 | 唐山钢铁集团有限责任公司 | Production method of cold-rolled low-carbon steel with high corrosion resistance |
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| CN109652625B (en) | 2021-02-23 |
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