CN108441765A - A kind of cold-rolled transformation induced plasticity and preparation method thereof - Google Patents

A kind of cold-rolled transformation induced plasticity and preparation method thereof Download PDF

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Publication number
CN108441765A
CN108441765A CN201810290120.8A CN201810290120A CN108441765A CN 108441765 A CN108441765 A CN 108441765A CN 201810290120 A CN201810290120 A CN 201810290120A CN 108441765 A CN108441765 A CN 108441765A
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cold
rolling
induced plasticity
transformation induced
rolled
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Inventor
李春诚
刘宏亮
高洪刚
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Bengang Steel Plates Co Ltd
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Bengang Steel Plates Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26Methods of annealing
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226Hot rolling
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236Cold rolling
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/002Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium

Abstract

The invention belongs to cold-rolled transformation induced plasticity manufacturing technology fields, specifically provide a kind of cold-rolled transformation induced plasticity, by weight percentage content, and the chemical composition for controlling steel plate is C:0.1 0.3%, Si:0.5 2.0%, Mn:1.0 2.5%, P≤0.2%;S≤0.03%, Al≤0.5%, surplus are Fe and inevitable field trash.Preparation method is additionally provided simultaneously, this method comprises the following steps, and molten iron pretreatment → converter smelting → external refining → continuous casting → heating → controlled rolling and controlled cooling → batches → pickling → cold rolling → continuous annealing → smooth.Compared with the prior art, the advantages of the present invention are as follows production cost is low, and ton steel cost reduces at least 500 yuan, and production control is relatively easy, and technological parameter is easily achieved, and surface quality is good, and comprehensive mechanical property is excellent, preferable local specialties related request.

Description

A kind of cold-rolled transformation induced plasticity and preparation method thereof
Technical field
The invention belongs to cold-rolled transformation induced plasticity manufacturing technology fields, and it is phase-change induced to specifically provide a kind of cold rolling Plasticity steel and preparation method thereof.
Background technology
The problems such as in order to avoid welding, surface quality problems, most of cold-rolled transformation induced plasticity plate composition designs are adopted It is substituted with high Al or partial alternative Si, because its intensity cannot be met the requirements, it has to expensive alloying element be added to improve Intensity, while high Al can also increase steel-making continuous casting production difficulty, in addition Al improves Ac3 phase transition temperatures so that annealing temperature is not It obtains and does not improve, increase energy consumption.And adds Si that need not add expensive alloy element and make up intensity, controlled by production technology It may be implemented to weld and solve surface quality problems, in addition equipment increases overaging segment length and suitably increases, and does not interfere with not only Rhythm of production, while being conducive to preferably improve the comprehensive performance of transformation induced plasticity steel.
Invention content
In order to solve the above technical problem, the present invention provides a kind of cold-rolled transformation induced plasticity plate and preparation method thereof, It using cheap C-Mn-Si systems design of alloy, is appropriately designed, is solved by Atmosphere Control and overaging section The technical problems such as plate surface quality and mechanical property.
Specifically, the present invention provides a kind of cold-rolled transformation induced plasticity, content by weight percentage controls steel plate Chemical composition be C:0.1-0.3%, Si:0.5-2.0%, Mn:1.0-2.5%, P≤0.2%, S≤0.03%, Al≤ 0.5%, surplus is Fe and inevitable field trash.
Further, content, the chemical composition for controlling steel plate are C by weight percentage:0.1%, Si:0.5%, Mn: 1.0%, P:0.2%, S:0.03%, Al:0.5%, surplus is Fe and inevitable field trash.
Further, content, the chemical composition for controlling steel plate are C by weight percentage:0.3%, Si:2.0%, Mn: 2.5%, P:0.15%, S:0.02%, Al:0.4%, surplus is Fe and inevitable field trash.
Further, content, the chemical composition for controlling steel plate are C by weight percentage:0.21%, Si:1.4%, Mn: 1.6%, P≤0.2%, S≤0.03%, Al≤0.5%, surplus are Fe and inevitable field trash.
Further, content, the chemical composition for controlling steel plate are C by weight percentage:0.20%, Si:1.5%, Mn: 1.6%, P≤0.2%,;S≤0.03%, Al≤0.5%, surplus are Fe and inevitable field trash.
Further, content, the chemical composition for controlling steel plate are C by weight percentage:0.21%, Si:1.5%, Mn: 1.5%, P≤0.2%;S≤0.03%, Al≤0.5%, surplus are Fe and inevitable field trash.
According to another aspect of the present invention, a kind of preparation method of cold-rolled transformation induced plasticity plate, the party are additionally provided Method includes the following steps, molten iron pretreatment → converter smelting → external refining → continuous casting → heating → controlled rolling and controlled cooling → batches → Pickling → cold rolling → continuous annealing → smooth.
Further, wherein continuous annealing process parameter is as shown in the table:
Further, in the heating process, hot rolling slab heating temperature is 1220~1300 DEG C;The controlled rolling control During cold, start rolling temperature is 1100~1150 DEG C, and finishing temperature is 880~940 DEG C, and section cooling, cooling speed are used after rolling Rate is 20~40 DEG C/s;In curly course, coiling temperature is 600~660 DEG C, the reduction ratio of cold-rolled process use >=50%.
Compared with the prior art, the advantages of the present invention are as follows production cost is low, and ton steel cost reduces at least 500 yuan, life Production control is relatively easy, and technological parameter is easily achieved, and surface quality is good, and comprehensive mechanical property is excellent, and preferable local specialties are related It is required that.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to this hair It is bright to be further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not For limiting the present invention.
Embodiment 1:
A kind of cold-rolled transformation induced plasticity plate, by weight percentage content, the chemical composition for controlling steel are C: 0.21%, Si:1.4%, Mn:1.6%, P≤0.2%, S≤0.03%, Al≤0.5%, surplus are Fe and inevitably press from both sides Sundries.
A kind of preparation method of cold-rolled transformation induced plasticity plate is additionally provided simultaneously, and this method includes using following Technological process:
Molten iron pretreatment → converter smelting → external refining → continuous casting → heating → controlled rolling and controlled cooling → batches → and pickling → cold Roll → continuous annealing → smooth → function inspection → packaging manufacture;
Wherein, hot rolling slab heating temperature is 1220~1300 DEG C, and start rolling temperature is 1100~1150 DEG C, finishing temperature It it is 880~940 DEG C, it is 20~40 DEG C/s that section cooling, cooling rate are used after rolling, and coiling temperature is 600~660 DEG C.Cold rolling Using 55% reduction ratio, continuous annealing process parameter is as shown in the table:
The mechanical property situation of final products is as shown in the table:
Steel grade Yield strength (MPa) Tensile strength (MPa) Elongation percentage A80 (%) N90 values
Standard 420~580 ≥780 ≥20 ≥0.15
TRIP780 486 854 24.5 0.23
TRIP780 505 860 26 0.23
Embodiment 2:
A kind of cold-rolled transformation induced plasticity plate, by weight percentage content, the chemical composition for controlling steel plate are C: 0.20%, Si:1.5%, Mn:1.6%, P≤0.2%, S≤0.03%, Al≤0.5%, surplus are Fe and inevitably press from both sides Sundries.
A kind of preparation method of cold-rolled transformation induced plasticity plate is additionally provided simultaneously, and this method includes using following Technological process:
Molten iron pretreatment → converter smelting → external refining → continuous casting → heating → controlled rolling and controlled cooling → batches → and pickling → cold Roll → continuous annealing → smooth → function inspection → packaging manufacture;
Wherein, hot rolling slab heating temperature is 1220~1300 DEG C, and start rolling temperature is 1100~1150 DEG C, finishing temperature It it is 880~940 DEG C, it is 20~40 DEG C/s that section cooling, cooling rate are used after rolling, and coiling temperature is 600~660 DEG C.Cold rolling Using 53% reduction ratio, continuous annealing process parameter is as shown in the table:
The mechanical property situation of final products is as shown in the table:
Steel grade Yield strength (MPa) Tensile strength (MPa) Elongation percentage A80 (%) N90 values
Standard 420~580 ≥780 ≥20 ≥0.15
TRIP780 478 847 24.5 0.20
TRIP780 483 854 24.5 0.20
Embodiment 3:
A kind of cold-rolled transformation induced plasticity plate, by weight percentage content, the chemical composition for controlling steel plate are C: 0.21%, Si:1.5%, Mn:1.5%, P≤0.2%;S≤0.03%, Al≤0.5%, surplus are Fe and inevitably press from both sides Sundries.
A kind of preparation method of cold-rolled transformation induced plasticity plate is additionally provided simultaneously, and this method includes using following Technological process:
Molten iron pretreatment → converter smelting → external refining → continuous casting → heating → controlled rolling and controlled cooling → batches → and pickling → cold Roll → continuous annealing → smooth → function inspection → packaging manufacture;
Wherein, hot rolling slab heating temperature is 1220~1300 DEG C, and start rolling temperature is 1100~1150 DEG C, finishing temperature It it is 880~940 DEG C, it is 20~40 DEG C/s that section cooling, cooling rate are used after rolling, and coiling temperature is 600~660 DEG C.Cold rolling Using 55% reduction ratio, continuous annealing process parameter is as shown in the table:
The mechanical property situation of final products is as shown in the table:
Steel grade Yield strength (MPa) Tensile strength (MPa) Elongation percentage A80 (%) N90 values
Standard 420~580 ≥780 ≥20 ≥0.15
TRIP780 503 867 26.5 0.22
TRIP780 501 867 26 0.21
Embodiment 4:
A kind of cold-rolled transformation induced plasticity plate, by weight percentage content, the chemical composition for controlling steel plate are C: 0.1%, Si:0.5%, Mn:1.0%, P:0.2%;S:0.03%, Al:0.5%, surplus is Fe and is inevitably mingled with Object.
The preparation method for providing a kind of cold-rolled transformation induced plasticity plate is returned simultaneously, and this method includes using as follows Technological process:
Molten iron pretreatment → converter smelting → external refining → continuous casting → heating → controlled rolling and controlled cooling → batches → and pickling → cold Roll → continuous annealing → smooth → function inspection → packaging manufacture;
Wherein, hot rolling slab heating temperature is 1220 DEG C, and start rolling temperature is 1100 DEG C, and finishing temperature is 880 DEG C, after rolling Using section cooling, cooling rate is 20 DEG C/s, and coiling temperature is 600 DEG C.Cold rolling uses 55% reduction ratio, continuous annealing Technological parameter is as shown in the table:
The mechanical property situation of final products is as shown in the table:
Steel grade Yield strength (MPa) Tensile strength (MPa) Elongation percentage A80 (%) N90 values
Standard 420~580 ≥780 ≥20 ≥0.15
TRIP780 503 867 26.5 0.22
TRIP780 501 867 26 0.21
Embodiment 5:
A kind of cold-rolled transformation induced plasticity plate, by weight percentage content, the chemical composition for controlling steel plate are C: 0.3%, Si:2.0%, Mn:2.5%, P:0.15%;S:0.02%, Al:0.4%, surplus is Fe and is inevitably mingled with Object.
A kind of preparation method of cold-rolled transformation induced plasticity plate is additionally provided simultaneously, and this method includes using following Technological process:
Molten iron pretreatment → converter smelting → external refining → continuous casting → heating → controlled rolling and controlled cooling → batches → and pickling → cold Roll → continuous annealing → smooth → function inspection → packaging manufacture;
Wherein, hot rolling slab heating temperature is 1300 DEG C, and start rolling temperature is 1150 DEG C, and finishing temperature is 940 DEG C, after rolling Using section cooling, cooling rate is 40 DEG C/s, and coiling temperature is 660 DEG C.Cold rolling uses 55% reduction ratio, continuous annealing Technological parameter is as shown in the table:
The mechanical property situation of final products is as shown in the table:
Steel grade Yield strength (MPa) Tensile strength (MPa) Elongation percentage A80 (%) N90 values
Standard 420~580 ≥780 ≥20 ≥0.15
TRIP780 503 867 26.5 0.22
TRIP780 501 867 26 0.21
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.

Claims (6)

1. a kind of cold-rolled transformation induced plasticity, it is characterised in that:Content by weight percentage, the chemical composition for controlling steel plate are C:0.1-0.3%, Si:0.5-2.0%, Mn:1.0-2.5%, P≤0.2%, S≤0.03%, Al≤0.5%, surplus be Fe and Inevitable field trash.
2. a kind of cold-rolled transformation induced plasticity as described in claim 1, it is characterised in that:Content by weight percentage, control The chemical composition of steel plate processed is C:0.21%, Si:1.4%, Mn:1.6%, P≤0.2%, S≤0.03%, Al≤0.5%, it is remaining Amount is Fe and inevitable field trash.
3. a kind of cold-rolled transformation induced plasticity as described in claim 1, it is characterised in that:Content by weight percentage, control The chemical composition of steel plate processed is C:0.20%, Si:1.5%, Mn:1.6%, P≤0.2%, S≤0.03%, Al≤0.5%, it is remaining Amount is Fe and inevitable field trash.
4. a kind of preparation method of cold-rolled transformation induced plasticity plate, it is characterised in that:This method comprises the following steps, and molten iron is pre- Processing → converter smelting → external refining → continuous casting → heating → controlled rolling and controlled cooling → batches → and pickling → cold rolling → continuous annealing → It is smooth.
5. a kind of preparation method of cold-rolled transformation induced plasticity plate as claimed in claim 4, it is characterised in that:It is wherein continuous Parameter and annealing is as shown in the table:
6. a kind of preparation method of cold-rolled transformation induced plasticity plate as claimed in claim 4, it is characterised in that:Described adds In thermal process, hot rolling slab heating temperature is 1220~1300 DEG C;During the controlled rolling and controlled cooling, start rolling temperature be 1100~ 1150 DEG C, finishing temperature is 880~940 DEG C, and it is 20~40 DEG C/s that section cooling, cooling rate are used after rolling;In curly course, Coiling temperature is 600~660 DEG C, the reduction ratio of cold-rolled process use >=50%.
CN201810290120.8A 2018-04-03 2018-04-03 A kind of cold-rolled transformation induced plasticity and preparation method thereof Pending CN108441765A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109930079A (en) * 2019-03-29 2019-06-25 本钢板材股份有限公司 A kind of 980MPa grades of inexpensive cold rolling quenching partition steel and preparation method thereof
CN110878386A (en) * 2018-09-06 2020-03-13 本钢板材股份有限公司 Low-cost hot-galvanized phase-change induced plasticity steel and preparation method thereof
CN111020129A (en) * 2019-10-25 2020-04-17 本钢板材股份有限公司 700 MPa-grade cold-rolled TRIP steel plate and production method thereof
CN111534739A (en) * 2020-02-17 2020-08-14 本钢板材股份有限公司 980 MPa-grade high-formability cold-rolled phase-change induced plasticity steel and preparation method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001152254A (en) * 1999-11-30 2001-06-05 Kawasaki Steel Corp Method for producing highly workable hot rolled high tensile steel sheet excellent in material uniformity
CN102409235A (en) * 2010-09-21 2012-04-11 鞍钢股份有限公司 High-strength cold rolling transformation induced plasticity steel plate and preparation method thereof
CN102952996A (en) * 2013-01-04 2013-03-06 鞍钢股份有限公司 High-elongation cold-rolled TRIP (Transformation-Induced Plasticity) steel plate and preparation method thereof
CN103194669A (en) * 2013-04-12 2013-07-10 莱芜钢铁集团有限公司 Method for improving high plasticity of low-carbon silicomanganese cold-rolling transformation induced plasticity steels
CN105603306A (en) * 2016-01-25 2016-05-25 唐山钢铁集团有限责任公司 Dual-phase steel with transformation induced plasticity characteristic and production method thereof
CN106167875A (en) * 2016-09-29 2016-11-30 马钢(集团)控股有限公司 A kind of strength and ductility product economical high strength cold-rolled TRIP steel more than 20GPa % and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001152254A (en) * 1999-11-30 2001-06-05 Kawasaki Steel Corp Method for producing highly workable hot rolled high tensile steel sheet excellent in material uniformity
CN102409235A (en) * 2010-09-21 2012-04-11 鞍钢股份有限公司 High-strength cold rolling transformation induced plasticity steel plate and preparation method thereof
CN102952996A (en) * 2013-01-04 2013-03-06 鞍钢股份有限公司 High-elongation cold-rolled TRIP (Transformation-Induced Plasticity) steel plate and preparation method thereof
CN103194669A (en) * 2013-04-12 2013-07-10 莱芜钢铁集团有限公司 Method for improving high plasticity of low-carbon silicomanganese cold-rolling transformation induced plasticity steels
CN105603306A (en) * 2016-01-25 2016-05-25 唐山钢铁集团有限责任公司 Dual-phase steel with transformation induced plasticity characteristic and production method thereof
CN106167875A (en) * 2016-09-29 2016-11-30 马钢(集团)控股有限公司 A kind of strength and ductility product economical high strength cold-rolled TRIP steel more than 20GPa % and preparation method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110878386A (en) * 2018-09-06 2020-03-13 本钢板材股份有限公司 Low-cost hot-galvanized phase-change induced plasticity steel and preparation method thereof
CN109930079A (en) * 2019-03-29 2019-06-25 本钢板材股份有限公司 A kind of 980MPa grades of inexpensive cold rolling quenching partition steel and preparation method thereof
CN111020129A (en) * 2019-10-25 2020-04-17 本钢板材股份有限公司 700 MPa-grade cold-rolled TRIP steel plate and production method thereof
CN111534739A (en) * 2020-02-17 2020-08-14 本钢板材股份有限公司 980 MPa-grade high-formability cold-rolled phase-change induced plasticity steel and preparation method thereof

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