CN108796376A - Hot-dip galvanizing sheet steel and preparation method thereof - Google Patents
Hot-dip galvanizing sheet steel and preparation method thereof Download PDFInfo
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- CN108796376A CN108796376A CN201810706059.0A CN201810706059A CN108796376A CN 108796376 A CN108796376 A CN 108796376A CN 201810706059 A CN201810706059 A CN 201810706059A CN 108796376 A CN108796376 A CN 108796376A
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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
- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
-
- 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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention belongs to steel plate manufacturing technology fields, and in particular to a kind of hot-dip galvanizing sheet steel and preparation method thereof.Technical problem to be solved by the invention is to provide a kind of hot-dip galvanizing sheet steel, chemical composition is：By weight percentage, C：0.07~0.13%, Si：0.01~0.06%, Mn：0.20~0.90%, P：0.010~0.040%, S：≤ 0.015%, Als：0.020~0.070%, surplus is Fe and inevitable impurity.Preparation method is：Molten steel through smelting, after continuous casting slab, slab hot rolled-acid rolls-anneals-galvanizing process after, obtain hot-dip galvanizing sheet steel.260~330MPa of yield strength of the hot-dip galvanizing sheet steel, 350~430MPa of tensile strength, elongation percentage >=28.0%, n90 >=0.15, mechanical property and processability are excellent, disclosure satisfy that user vehicle requirement.
Description
Technical field
The invention belongs to Plate Production technical fields, and in particular to a kind of hot-dip galvanizing sheet steel and preparation method thereof.
Background technology
Automobile cold-rolled low-alloy high-strength steel has lower cost, has in automobile interiors part and widely answers
With.
CN 101956125B disclose a kind of flexible manufacturing method of Thin Specs low-alloy high-strength Series Steel, using letter
Single C-Mn steel basic ingredients realize 345~550MPa grades of steel grading controls of yield strength by controlled rolling and controlled cooling.But the invention
Based on continuous casting and rolling technique of sheet bar, and its final products is hot-rolled product, does not provide cold rolling and annealing operation grading performance control
Method processed.
CN1288269C discloses a kind of low-alloy high-strength steel manufacturing method, mass percent C：0.06~
0.09%, Mn：1.30~1.40%, Si：0.195~0.305%, P≤0.015%, S≤0.006%, V：0.025~
0.035%, Nb：0.015~0.025%, Ti：0.010~0.020%, Al：0.020~0.035%, CaO：0.0015~
0.0045%.The invention focuses on the manufacturing method of smelting process, mainly solves the problems, such as the degree of purity of edge chink line and steel.
CN 102492823B disclose a kind of continuous annealing work of yield strength 420MPa grades of cold rolling low alloy high strength steel plates
Skill.The invention mainly solves the problems, such as the setting of 420MPa grades of cold rolling low-alloy high-strength steel continuous annealing process parameters of yield strength.
CN103789625B discloses a kind of method of bell-type annealing production microalloying cold rolling low-alloy high-strength steel, at
Set up separately and is calculated as：C：0.05~0.10wt%, Mn：0.5~1.5wt%, S≤0.020wt%, Si≤0.5wt%, Nb：0.01~
0.05wt%, Ti：0.01~0.06wt%, in conjunction with bell-type annealing technique, can get yield strength is 462MPa, tensile strength
The comprehensive performance that 579MPa, elongation percentage A80 are 24%, but this method uses Nb-Ti combined microalloyings, it is of high cost.
Invention content
That technical problem to be solved by the invention is to provide a kind of forming properties is good, rebound is small, strength fluctuation ±
20MPa, properties of product stability is good, meets hot-dip galvanizing sheet steel and its preparation of automobile factory's punching press B column inner plate part requirements
Method.
The technical solution that the present invention solves above-mentioned technical problem is to provide a kind of hot-dip galvanizing sheet steel.The hot-dip galvanizing sheet steel, is pressed
Weight percent meter, chemical composition are：C：0.07~0.13%, Si：0.01~0.06%, Mn：0.20~0.90%, P：
0.010~0.040%, S：≤ 0.015%, Als：0.020~0.070%, surplus is Fe and inevitable impurity.
Preferably, above-mentioned hot-dip galvanizing sheet steel, 260~330MPa of yield strength, 350~430MPa of tensile strength, extension
Rate >=28.0%, n90 >=0.15.
The present invention also provides the preparation methods of above-mentioned hot-dip galvanizing sheet steel.The preparation method includes the following steps：Molten steel passes through
Smelt, after continuous casting slab, slab is heated-dephosphorization-roughing-finish rolling-cooling-batches-pickling-cold rolling-annealing-galvanizing work
After sequence, hot-dip galvanizing sheet steel is obtained.
Wherein, in the preparation method of above-mentioned hot-dip galvanizing sheet steel, the heating temperature is 1200~1250 DEG C.Heating time is
180~220min.
Wherein, in the preparation method of above-mentioned hot-dip galvanizing sheet steel, the start rolling temperature of the finish rolling is 1000~1100 DEG C, finish to gauge
Temperature is 860~930 DEG C.
Wherein, in the preparation method of above-mentioned hot-dip galvanizing sheet steel, the coiling temperature is 590~670 DEG C.
Wherein, in the preparation method of above-mentioned hot-dip galvanizing sheet steel, the cold rolling reduction ratio is 45~80%.
Wherein, in the preparation method of above-mentioned hot-dip galvanizing sheet steel, the annealing temperature is 670~750 DEG C.The annealing time
It is 120~240 DEG C.
Further, in the preparation method of above-mentioned hot-dip galvanizing sheet steel, the annealing operation is divided into heating, soaking, slow cooling three
A stage, heating temperature are 620~670 DEG C, and soaking temperature is 670~750 DEG C, and slow cooling temperature is 580~650 DEG C.Wherein, add
The purpose of hot stage is that slab is enable to enter soaking there are one buffering course, and the soaking stage is practical annealing stage, slow cooling stage
Purpose is to make buffering course progress galvanizing there are one slabs, to ensure slab quality.
Wherein, in the preparation method of above-mentioned hot-dip galvanizing sheet steel, hot dip is cooled to 40~80 DEG C/s after the annealing
Zinc temperature.
Wherein, in the preparation method of above-mentioned hot-dip galvanizing sheet steel, the galvanizing temperature is 440~470 DEG C.The galvanizing time
For 7~30s.
Wherein, in the preparation method of above-mentioned hot-dip galvanizing sheet steel, 280 are cooled to 10~50 DEG C/s after the galvanizing
It~300 DEG C, is then cooled to room temperature with 5~10 DEG C/s.
Wherein, in the preparation method of above-mentioned hot-dip galvanizing sheet steel, protective atmosphere dew-point temperature is -25 in stove when the galvanizing
~-60 DEG C.
The present invention provides a kind of new hot-dip galvanizing sheet steels, by the composition design to steel plate, especially to Mn, P content
Quantification composition design realizes hot-dip galvanizing sheet steel excellent surface quality in conjunction with peculiar rolling mill practice and annealing hot dip galvanizing process,
Forming property is excellent, and performance is stablized, and strength fluctuation is detected in ± 20Mpa by EN10268-2006, and yield strength 260~
The advantages that 330MPa, 350~430MPa of tensile strength, elongation percentage >=28.0%, n90 >=0.15, to meet automobile factory punching press B
Column inner plate part requirement.
Specific implementation mode
The present invention provides a kind of hot-dip galvanizing sheet steels, and by weight percentage, chemical composition is：C：0.07~0.13%,
Si：0.01~0.06%, Mn：0.20~0.90%, P：0.010~0.040%, S：≤ 0.015%, Als：0.020~
0.070%, surplus is Fe and inevitable impurity.
The main comprehensive performance for considering purity of steel and product of control of carbon content, if carbon content is less than 0.07%,
It must be vacuum-treated when steel-making, increase production cost；If carbon content is more than 0.13%, carburetting is needed, also increases the life of steel-making
Cost is produced, and the plasticity of steel plate reduces, while welding performance deteriorates.Silicon and nitrogen are existed as relict element, are not added specially,
More lower, better.Mn mainly improves intensity and is combined into MnS with sulphur, prevents the fire check caused by FeS, Mn content mistakes
Height can influence the welding performance of steel.P mainly improves intensity.S exists as relict element, it is contemplated that the economy of steel making working procedure
Property and Ca processing effect, by≤0.015% control.Aluminium is added primarily as deoxidant element, to realize complete deoxidation,
Content requirement is 0.015% or more, but excessively high aluminium will influence the welding performance and coating adhesion and uneconomical of steel, but
Content is too low, increases production control difficulty, therefore Al content is selected as 0.020%~0.070% and is advisable.
The present invention also provides the preparation methods of above-mentioned hot-dip galvanizing sheet steel, include the following steps：Molten steel is through smelting, after continuous casting
Slab, slab is heated-dephosphorization-roughing-finish rolling-cooling-batches-pickling-cold rolling-annealing-galvanizing process after, obtain heat
Galvanized steel plain sheet.
In the preparation process of above-mentioned hot-dip galvanizing sheet steel, in the austenitic area finish to gauge close to Ar3 when hot rolling, it is therefore desirable to heat
To 1150 DEG C~1200 DEG C progress roughing, so it is 1200~1250 DEG C that need to control heating temperature.In order to ensure coil of strip end to end
Temperature is uniform, need to control ranging from 860 DEG C~930 DEG C of finishing temperature, and finish rolling postcooling is within the temperature range of 590~670 DEG C
It batches, to obtain tiny hot rolling microstructure and ensure that AlN is fully precipitated, on the one hand reduces annealing recrystallization temperature, be conducive to reality
Recrystallization low-temperature space annealing crystal grain thinning is applied, precipitations of the AlN in annealing process is on the other hand eliminated and grows up to ferrite crystal grain
Control action and the tissue of coil of strip, performance can be improved to not only contribute to the implementation of recrystallization low-temperature space annealing process
Uniformity.Cold rolling reduction ratio is improved, reduces recrystallization temperature, crystal grain thinning, cold rolling reduction ratio is according to 45%~80% control.It is logical
The annealing for crossing continuous hot galvanizing reaches reply and perfect recrystallization, ensures microstructure and mechanical property, to meet user's punching parts
Performance.
Gained hot-dip galvanizing sheet steel of the invention is detected by EN10268-2006,260~330MPa of yield strength, tensile strength
350~430MPa, elongation percentage >=28.0%, n90 >=0.15.
Embodiment 1-2
Hot-dip galvanizing sheet steel ingredient of the present invention and preparation process are specific as follows：
(1) by smelting, continuous casting working procedure, the plate slab of chemical composition as shown in table 1 below is prepared：
1 plate slab chemical composition (wt.%) of table
| Number | C | Si | Mn | P | S | Als |
| Embodiment 1 | 0.07 | 0.04 | 0.22 | 0.03 | 0.003 | 0.052 |
| Embodiment 2 | 0.11 | 0.01 | 0.45 | 0.01 | 0.008 | 0.029 |
(2) heating, roughing, finish rolling, cooling, the hot-rolled process parameter such as to batch as shown in table 2 below：
2 hot rolling main technologic parameters of table
(3) by hot rolled coil pickling, be cold rolled to Thin Strip Steel, wherein embodiment 1,2 cold rolling reduction ratios be respectively 70.3%,
61.3%；
(4) annealing, galvanizing process parameter are as shown in table 3 below：
The annealing of table 3, galvanizing main technologic parameters
(5) hot-dip galvanizing sheet steel prepared through above-mentioned operation, mechanical property are as shown in table 4 below：
4 hot-dip galvanizing sheet steel mechanical property of table
From the result of Examples 1 and 2：Hot-dip galvanizing sheet steel prepared by the present invention has good mechanical property, bends
260~330MPa of intensity, 350~430MPa of tensile strength, elongation percentage >=28.0%, n90 >=0.15 are taken, disclosure satisfy that use is wanted
It asks.The present invention provides a kind of completely new hot-dip galvanizing sheet steels, have excellent performance, of low cost, have apparent economic benefit.
Claims (10)
1. hot-dip galvanizing sheet steel, it is characterised in that：By weight percentage, chemical composition is：C：0.07~0.13%, Si：0.01
~0.06%, Mn：0.20~0.90%, P：0.010~0.040%, S：≤ 0.015%, Als：0.020~0.070%, surplus
For Fe and inevitable impurity.
2. hot-dip galvanizing sheet steel according to claim 1, it is characterised in that：260~330MPa of yield strength, tensile strength
350~430MPa, elongation percentage >=28.0%, n90 >=0.15.
3. the preparation method of hot-dip galvanizing sheet steel as claimed in claim 1 or 2, it is characterised in that：Include the following steps：Molten steel is through smelting
Refining, after continuous casting slab, slab is heated-dephosphorization-roughing-finish rolling-cooling-batches-pickling-cold rolling-annealing-galvanizing process
Afterwards, hot-dip galvanizing sheet steel is obtained.
4. the preparation method of hot-dip galvanizing sheet steel according to claim 3, it is characterised in that：The heating temperature be 1200~
1250℃。
5. the preparation method of hot-dip galvanizing sheet steel according to claim 3, it is characterised in that：The start rolling temperature of the finish rolling is
1000~1100 DEG C, finishing temperature is 860~930 DEG C.
6. the preparation method of hot-dip galvanizing sheet steel according to claim 3, it is characterised in that：The coiling temperature be 590~
670℃。
7. the preparation method of hot-dip galvanizing sheet steel according to claim 3, it is characterised in that：The cold rolling reduction ratio be 45~
80%.
8. the preparation method of hot-dip galvanizing sheet steel according to claim 3, it is characterised in that：The annealing temperature be 670~
750 DEG C, annealing time is 120~240s.
9. the preparation method of hot-dip galvanizing sheet steel according to claim 3, it is characterised in that：The temperature of the galvanizing is
440~470 DEG C, the time of galvanizing is 7~30s.
10. the preparation method of hot-dip galvanizing sheet steel according to claim 3, it is characterised in that：With 40 after the annealing
~80 DEG C/s is cooled to galvanizing temperature；After the galvanizing 280~300 DEG C are cooled to 10~50 DEG C/s, then with 5~
10 DEG C/s is cooled to room temperature.
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ID=64073978
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109972058A (en) * | 2019-03-28 | 2019-07-05 | 北京科技大学 | A kind of air-cooled reinforcing steel of automobile cold-rolled low-alloy high-strength and preparation method |
| CN111304540A (en) * | 2020-04-10 | 2020-06-19 | 山东钢铁集团日照有限公司 | Cold-rolled steel strip for 280 Mpa-grade automobile structure and manufacturing method thereof |
| CN112430788A (en) * | 2019-08-26 | 2021-03-02 | 上海梅山钢铁股份有限公司 | Hot-dip galvanized steel sheet for 304 stainless steel composite board and manufacturing method thereof |
| CN112872036A (en) * | 2021-01-14 | 2021-06-01 | 首钢京唐钢铁联合有限责任公司 | Method for eliminating microcracks on surface of galvanized plate |
| CN113684419A (en) * | 2021-08-11 | 2021-11-23 | 山东钢铁集团日照有限公司 | Low-cost 400 MPa-grade cold-rolled continuous annealing steel strip and production method thereof |
| CN116288025A (en) * | 2023-02-28 | 2023-06-23 | 马鞍山钢铁股份有限公司 | High-strength structural-grade coated steel plate for photovoltaic and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104988389A (en) * | 2015-07-30 | 2015-10-21 | 武汉钢铁(集团)公司 | Automobile alloyed hot-dip galvanized steel with tensile strength of 340 MPa grade and production method thereof |
| CN105063475A (en) * | 2015-07-30 | 2015-11-18 | 武汉钢铁(集团)公司 | Alloying hot-dip galvanized steel with tensile strength being 390 MPa-level and used for automobile and production method |
-
2018
- 2018-06-28 CN CN201810706059.0A patent/CN108796376A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104988389A (en) * | 2015-07-30 | 2015-10-21 | 武汉钢铁(集团)公司 | Automobile alloyed hot-dip galvanized steel with tensile strength of 340 MPa grade and production method thereof |
| CN105063475A (en) * | 2015-07-30 | 2015-11-18 | 武汉钢铁(集团)公司 | Alloying hot-dip galvanized steel with tensile strength being 390 MPa-level and used for automobile and production method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109972058A (en) * | 2019-03-28 | 2019-07-05 | 北京科技大学 | A kind of air-cooled reinforcing steel of automobile cold-rolled low-alloy high-strength and preparation method |
| CN112430788A (en) * | 2019-08-26 | 2021-03-02 | 上海梅山钢铁股份有限公司 | Hot-dip galvanized steel sheet for 304 stainless steel composite board and manufacturing method thereof |
| CN111304540A (en) * | 2020-04-10 | 2020-06-19 | 山东钢铁集团日照有限公司 | Cold-rolled steel strip for 280 Mpa-grade automobile structure and manufacturing method thereof |
| CN112872036A (en) * | 2021-01-14 | 2021-06-01 | 首钢京唐钢铁联合有限责任公司 | Method for eliminating microcracks on surface of galvanized plate |
| CN113684419A (en) * | 2021-08-11 | 2021-11-23 | 山东钢铁集团日照有限公司 | Low-cost 400 MPa-grade cold-rolled continuous annealing steel strip and production method thereof |
| CN116288025A (en) * | 2023-02-28 | 2023-06-23 | 马鞍山钢铁股份有限公司 | High-strength structural-grade coated steel plate for photovoltaic and manufacturing method thereof |
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Application publication date: 20181113 |