CN106636914B - A kind of IF steel and preparation method thereof - Google Patents
A kind of IF steel and preparation method thereof Download PDFInfo
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- CN106636914B CN106636914B CN201610978738.4A CN201610978738A CN106636914B CN 106636914 B CN106636914 B CN 106636914B CN 201610978738 A CN201610978738 A CN 201610978738A CN 106636914 B CN106636914 B CN 106636914B
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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%
-
- 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
-
- 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
-
- 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
- C21D8/0242—Flattening; Dressing; Flexing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention discloses a kind of IF steel and preparation method thereof, belong to metal material processing field.The IF steel, chemical analysis mass percent are：C：0~0.0030%, Mn：0.05~0.5%, Al：0.01~0.08%, Nb：0.01 0.06%, Ti：0.01~0.06%, constraint element Si≤0.06%, P≤0.02%, S≤0.01%, N≤0.005%, remaining is Fe.The IF steel that IF steel of the present invention and preparation method thereof obtains has relatively low strong, higher r values in the wrong.
Description
Technical field
The present invention relates to metal material processing field, more particularly to a kind of IF steel and preparation method thereof.
Background technology
Currently, IF steel have excellent deep drawability, be widely used in production have excellent deep drawability require automobile,
Household electrical appliances inner and outer plates.IF steel mechanical properties have yield strength low, and elongation percentage is high, the high feature of r values, and it is good can to ensure that steel plate has
Good forming property.In order to obtain favorable forming property, it need to ensure that IF steel plates have higher degree of purity, while ensureing rational
Whole process manufacturing processing technic.The production technology of IF steel routines is that slab passes through after heating, and it is thick to carry out hot rolling in austenitic area
It rolls and finish rolling, using higher coiling temperature；In the cold rolling process segment, using big cold rolling reduction ratio, at relatively high temperatures into
Row annealing, and then obtain excellent mechanical property.But IF steel in the prior art bend it is strong it is higher, r values are relatively low.
Invention content
The present invention provides a kind of IF steel and preparation method thereof, solve or part solve IF steel in the prior art bend by force compared with
Technical problem high, r values are relatively low.
In order to solve the above technical problems, the present invention provides a kind of IF steel, chemical analysis mass percent is：C：0~
0.0030%, Mn：0.05~0.5%, Al：0.01~0.08%, Nb：0.01-0.06%, Ti：0.01~0.06%, limitation member
Plain Si≤0.06%, P≤0.02%, S≤0.01%, N≤0.005%, remaining is Fe.
Based on identical inventive concept, the present invention also provides a kind of preparation method of IF steel, the preparation method include with
Lower step：Molten iron is obtained into slab by smelting；The slab is subjected to hot rolling, obtains hot rolled plate using roughing, finish rolling, so
Hot rolled plate is cooled down afterwards, hot rolled coil is curled into after cooling；The hot rolled coil is obtained into chill volume by cold rolling；It will be described cold
Hard volume passes through continuous annealing and galvanizing, and the annealing soak temperature is 780~870 DEG C, and then finishing is curled into finished product.
Further, described that the slab is subjected to hot rolling, hot rolled plate is obtained using roughing, finish rolling, then by hot rolling
Plate is cooled down, and being curled into hot rolled coil after cooling includes：The slab is heated to 1080~1250 DEG C from room temperature, heat preservation 2~4
Hour, pass through roughing later, ensures that roughing outlet temperature is not less than 890 DEG C, enter essence when intermediate base temperature is 800-840 DEG C
It rolls, hot rolling finishing temperature is 720~800 DEG C, and coiling temperature is 600~700 DEG C.
Further, the roughing total reduction is 60-85%.
Further, described to include by cold rolling acquisition chill volume by the hot rolled coil：The cold rolling reduction ratio be 75~
90%.
Further, described that the chill volume is passed through continuous annealing and galvanizing, then finishing is curled into finished product and includes：
The finishing elongation percentage 0.2~1.5% of the galvanizing.
The chemical analysis mass percent of the IF steel of F steel provided by the invention and preparation method thereof is：C：0~
0.0030%, Mn：0.05~0.5%, Al：0.01~0.08%, Nb：0.01-0.06%, Ti：0.01~0.06%, limitation member
Molten iron is obtained slab by smelting, slab is carried out by plain Si≤0.06%, P≤0.02%, S≤0.01%, N≤0.005%
Hot rolling obtains hot rolled plate using roughing, finish rolling, then cools down hot rolled plate, hot rolled coil is curled into after cooling, by hot rolling
Volume obtains chill volume by cold rolling, chill volume is passed through continuous annealing and galvanizing, annealing soak temperature is 780~870 DEG C, so
Finishing is curled into finished product afterwards, and obtained IF steel has relatively low strong, higher r values in the wrong.
Description of the drawings
Fig. 1 is the preparation method flow diagram of IF steel provided in an embodiment of the present invention.
Specific implementation mode
Referring to Fig. 1, a kind of IF steel provided in an embodiment of the present invention, chemical analysis mass percent is：C：0~
0.0030%, Mn：0.05~0.5%, Al：0.01~0.08%, Nb：0.01-0.06%, Ti：0.01~0.06%, limitation member
Plain Si≤0.06%, P≤0.02%, S≤0.01%, N≤0.005%, remaining is Fe.
C is one of the basic element in steel, can improve intensity, and lower C content is conducive to improve Sheet Forming Ability.
Mn is intensified element.Mn plays solution strengthening effect in steel, is conducive to improve armor plate strength.
Al plays deoxidier in steelmaking process, and can fix N.
Nb is micro alloying element, can fix C in steel, forms precipitated phase, refining grain size, reduce steel plate it is each to
It is anisotropic.
Ti is micro alloying element, can fix N in steel, forms precipitated phase, improves steel formability ability.
Based on identical inventive concept, the present invention also provides a kind of preparation method of IF steel, the preparation method include with
Lower step：
Step 1, molten iron is obtained into slab by smelting.
Step 2, the slab is subjected to hot rolling, obtains hot rolled plate using roughing, finish rolling, then carries out hot rolled plate cold
But, it is curled into hot rolled coil after cooling.
Step 3, the hot rolled coil is obtained into chill volume by cold rolling.
Step 4, the chill volume being passed through into continuous annealing and galvanizing, the annealing soak temperature is 780~870 DEG C,
Then finishing is curled into finished product.
Technical solution of the present invention is by the way that the chemical analysis mass percent of IF steel to be set as：C：0~0.0030%, Mn：
0.05~0.5%, Al：0.01~0.08%, Nb：0.01-0.06%, Ti：0.01~0.06%, constraint element Si≤
Molten iron is obtained slab by smelting, slab is carried out hot rolling by 0.06%, P≤0.02%, S≤0.01%, N≤0.005%,
Hot rolled plate is obtained using roughing, finish rolling, then hot rolled plate is cooled down, hot rolled coil is curled into after cooling, hot rolled coil is led to
It crosses cold rolling and obtains chill volume, chill volume is passed through into continuous annealing and galvanizing, annealing soak temperature is 780~870 DEG C, then light
Whole to be curled into finished product, obtained IF steel has relatively low strong, higher r values in the wrong.
Step 2 is discussed in detail.
It is described that the slab is subjected to hot rolling, hot rolled plate is obtained using roughing, finish rolling, is then carried out hot rolled plate cold
But, being curled into hot rolled coil after cooling includes：The slab is heated to 1080~1250 DEG C from room temperature, keeps the temperature 2~4 hours, it
Afterwards by roughing, ensures that roughing outlet temperature is not less than 890 DEG C, enter finish rolling, hot rolling when intermediate base temperature is 800-840 DEG C
Finishing temperature is 720~800 DEG C, and coiling temperature is 600~700 DEG C.The roughing total reduction is 60-85%, described in guarantee
Slab has enough deformations in roughing.
Step 3 is discussed in detail.
It is described to include by cold rolling acquisition chill volume by the hot rolled coil：The cold rolling reduction ratio is 75~90%.
Step 4 is discussed in detail.
Described that the chill volume is passed through continuous annealing and galvanizing, then finishing is curled into finished product and includes：The hot dip
The finishing elongation percentage 0.2~1.5% of zinc.
The embodiment of the present invention is introduced in order to clearer, is introduced from the application method of the embodiment of the present invention below.
It is by chemical analysis mass percent：C：0~0.0030%, Mn：0.05~0.5%, Al：0.01~0.08%,
Nb：0.01-0.06%, Ti：0.01~0.06%, constraint element Si≤0.06%, P≤0.02%, S≤0.01%, N≤
0.005%, remaining obtains slab for the molten iron of Fe by smelting.Slab is subjected to hot rolling, hot rolling is obtained using roughing, finish rolling
Then plate cools down hot rolled plate, hot rolled coil is curled into after cooling.Slab is heated to 1080~1250 DEG C from room temperature, is protected
Temperature 2~4 hours passes through roughing later, ensures that roughing outlet temperature is not less than 890 DEG C, when intermediate base temperature is 800-840 DEG C
Into finish rolling, hot rolling finishing temperature is 720~800 DEG C, and coiling temperature is 600~700 DEG C.Roughing total reduction is 60-85%,
Ensure that the slab has enough deformations in roughing.By hot rolled coil by cold rolling obtain chill volume, cold rolling reduction ratio be 75~
90%.Chill volume is passed through into continuous annealing and galvanizing, annealing soak temperature is 780~870 DEG C, the finishing elongation percentage of galvanizing
0.2~1.5%, then finishing is curled into finished product.
Table 1IF steel chemical compositions
Table 2IF steel mechanical properties
Referring to table 1-2, according to requirement of the present invention, it is about that 0.52~0.53, r values are not low that can produce yield tensile ratio
In the 2.8 excellent IF steel of comprehensive mechanical property.
It should be noted last that the above specific implementation mode is merely illustrative of the technical solution of the present invention and unrestricted,
Although being described the invention in detail with reference to example, it will be understood by those of ordinary skill in the art that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit of the technical scheme of the invention and range, should all cover
In the scope of the claims of the present invention.
Claims (4)
1. a kind of preparation method of IF steel, the chemical analysis mass percent of the IF steel are：C：0~0.0030%, Mn：0.05
~0.5%, Al：0.01~0.08%, Nb：0.01-0.06%, Ti：0.01~0.06%, constraint element Si≤0.06%, P≤
0.02%, S≤0.01%, N≤0.005%, remaining is Fe, which is characterized in that the preparation method comprises the following steps：
Molten iron is obtained into slab by smelting；
The slab is subjected to hot rolling, hot rolled plate is obtained using roughing, finish rolling, then cools down hot rolled plate, after cooling
Be curled into hot rolled coil, it is described that the slab is subjected to hot rolling, obtain hot rolled plate using roughing, finish rolling, then by hot rolled plate into
Row cooling, being curled into hot rolled coil after cooling includes：The slab is heated to 1080~1250 DEG C from room temperature, heat preservation 2~4 is small
When, pass through roughing later, ensures that roughing outlet temperature is not less than 890 DEG C, enter essence when intermediate base temperature is 800-840 DEG C
It rolls, hot rolling finishing temperature is 720~800 DEG C, and coiling temperature is 600~700 DEG C；
The hot rolled coil is obtained into chill volume by cold rolling；
The chill volume is passed through into continuous annealing and galvanizing, the annealing soak temperature is 780~870 DEG C, and then finishing is rolled up
Song is at finished product.
2. preparation method according to claim 1, it is characterised in that：
The roughing total reduction is 60-85%.
3. preparation method according to claim 1, which is characterized in that it is described the hot rolled coil is obtained by cold rolling it is chill
Volume includes：
The cold rolling reduction ratio is 75~90%.
4. preparation method according to claim 1, which is characterized in that described that the chill volume is passed through continuous annealing and heat
Zinc-plated, then finishing is curled into finished product and includes：
The finishing elongation percentage 0.2~1.5% of the galvanizing.
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| CN106498139B (en) * | 2016-11-22 | 2018-11-09 | 首钢京唐钢铁联合有限责任公司 | Process method and device for producing IF steel |
| CN107442915B (en) * | 2017-09-21 | 2020-08-04 | 武汉钢铁有限公司 | Narrow lap welding method for 440 MPa-grade cold-rolled phosphorus-containing high-strength IF steel |
| CN109022736B (en) * | 2018-08-06 | 2020-07-24 | 首钢集团有限公司 | Cold rolling process regulation and control method for interstitial free steel continuous annealing sheet |
| CN111471925A (en) * | 2020-02-17 | 2020-07-31 | 本钢板材股份有限公司 | Low-cost ultra-wide automobile outer plate and preparation method thereof |
| CN112048671B (en) * | 2020-09-07 | 2021-10-01 | 北京首钢股份有限公司 | Continuous annealing cold-rolled carbon steel for stamping and preparation method thereof |
| CN112048674B (en) * | 2020-09-17 | 2022-02-15 | 南京奇纳金属材料科技有限公司 | Low-yield-ratio phosphorus-containing high-strength interstitial-free steel and preparation method thereof |
| CN115491570A (en) * | 2022-09-21 | 2022-12-20 | 攀钢集团研究院有限公司 | Production method of thick ultra-deep drawing hot-dip galvanized steel plate |
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| JPH10280092A (en) * | 1997-04-10 | 1998-10-20 | Nippon Steel Corp | Hot dip galvanized steel sheet minimal in age deterioration in press formability and excellent in baking finish hardenability, and its production |
| CN101880827B (en) * | 2010-07-09 | 2012-08-15 | 武汉钢铁(集团)公司 | IF steel with delta r less than or equal to 0.3 and production method thereof |
| CN103551382B (en) * | 2013-11-07 | 2015-08-26 | 首钢总公司 | A kind of production method solved containing P high-strength IF hot-strip straightening broken belt |
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