CN108546876A - A kind of hot rolled steel plate and preparation method thereof - Google Patents
A kind of hot rolled steel plate and preparation method thereof Download PDFInfo
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- CN108546876A CN108546876A CN201810429327.9A CN201810429327A CN108546876A CN 108546876 A CN108546876 A CN 108546876A CN 201810429327 A CN201810429327 A CN 201810429327A CN 108546876 A CN108546876 A CN 108546876A
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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
-
- 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
-
- 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
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
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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 Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
A kind of hot rolled steel plate, by mass percentage, hot rolled steel plate are made of following chemical composition：0.20~0.25% C, 0.10~0.40% Si, 1.00~1.50% Mn, 0.10~0.40% Cr, 0.01~0.04% Ti, 0.01~0.06% Al, 0.01~0.10% V, 0.0015~0.0035% B ,≤0.020% P ,≤0.010% S ,≤0.006% N and the Fe of surplus and inevitable impurity.Its v element added improves the mechanics ability of hot rolled steel plate by modes such as crystal grain refinement and precipitation strengths.
Description
Technical field
The present invention relates to metallurgical technology fields, and more particularly to a kind of hot rolled steel plate and preparation method thereof.
Background technology
With the development of automotive light weight technology technology, automobile steel develops towards high-strength steel direction has become inexorable trend.It is high
Have the characteristics that resistance of deformation is small, plasticity is excellent before strong steel hot forming, be conducive to forming；Have superelevation strong after hot forming and quenching
Degree, so hot forming steel is widely used in automobile structure and reinforcer, including column, bumper and collision prevention girders etc..
Invention content
The purpose of the present invention is to provide a kind of hot rolled steel plates, have excellent performance, and have higher yield strength and tension
Intensity.
The second object of the present invention is to provide a kind of preparation method of hot rolled steel plate, and this method is simple, easy to operate.
The present invention solves its technical problem using following technical scheme to realize.
The present invention proposes a kind of hot rolled steel plate, and by mass percentage, hot rolled steel plate is made of following chemical composition：
0.20~0.25% C, 0.10~0.40% Si, 1.00~1.50% Mn, 0.10~0.40% Cr,
0.01~0.04% Ti, 0.01~0.06% Al, 0.01~0.10% V, 0.0015~0.0035% B ,≤
0.020% P ,≤0.010% S ,≤0.006% N and the Fe of surplus and inevitable impurity.
A kind of preparation method of hot rolled steel plate, including：The raw material formed with above-mentioned chemical composition is smelted, is cast
At after slab by hot rolling, section cooling, wherein the finish rolling start rolling temperature of course of hot rolling be 1000~1100 DEG C, finishing temperature
It is 850~950 DEG C.
The advantageous effect of the embodiment of the present invention is：In hot rolled steel plate of the disclosure and preparation method thereof, the v element of addition
The mechanics ability for improving hot rolled steel plate by modes such as crystal grain refinement and precipitation strengths is conducive to obtain in subsequent course of hot rolling
The high hot rolled steel plate steel sheet component of intensity.The expensive microalloy elements such as addition Nb, Mo are avoided, cost has been saved.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the micro-organization chart of the hot rolled steel plate substrate of the embodiment of the present invention 1；
Fig. 2 is the micro-organization chart of the hot rolled steel plate component of the embodiment of the present invention 1.
Specific implementation mode
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, builds according to normal condition or manufacturer
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Below to a kind of hot rolled steel plate of the embodiment of the present invention and preparation method thereof, it is specifically described.
The more microalloy element that can add the costliness such as Nb, Mo, increases production cost in existing high-strength steel, meanwhile,
Nb inhibits Austenite Dynamic Recrystallization so that hot rolling load and difficulty increase.And formed due to high C content in preparation process
Twin crystal martensite leads to brittleness, needs thermoformed parts carrying out temper.
Based on this, the present embodiment provides a kind of hot rolled steel plates and preparation method thereof.
A kind of hot rolled steel plate, by mass percentage, hot rolled steel plate are made of following chemical composition：
0.20~0.25% C, 0.10~0.40% Si, 1.00~1.50% Mn, 0.10~0.40% Cr,
0.01~0.04% Ti, 0.01~0.06% Al, 0.01~0.10% V, 0.0015~0.0035% B ,≤
0.020% P ,≤0.010% S ,≤0.006% N and the Fe of surplus and inevitable impurity.
Wherein, C (carbon) is one of as the most important component of hot forming steel, determine the intensity of hot rolled steel plate, plasticity and at
Shape performance.C is the most apparent element of solid solution strengthening effect in steel material, and being dissolved C content in steel increases by 0.1%, and intensity can
Improve about 450MPa.When C content is too low, the stability and martensite hardenability of austenite decline, and lead to low strength；C content
When excessively high, the plasticity and welding performance of dual phase steel decline.Therefore, it is 0.20~0.25% to select the content of C.In some embodiment party
In formula, the content of C is 0.21~0.23%.In some embodiments, the content of C is 0.22~0.23%
Wherein, Si (silicon) can be solid-solution in ferrite and austenite to improve the intensity of steel, and effect is only second to C, P member
Element is strong compared with elements such as Mn, Cr, Ti and Ni.Si can also inhibit the precipitation of carbide in ferrite, make solid solution C atoms fully to
It is enriched in austenite, to improve its stability.However, when Si too high levels, surface oxidation iron that Si is formed in heating furnace
Skin is difficult removal, can increase dephosphorization difficulty.Therefore, it is 0.10~0.40% to select the content of Si.In some embodiments, Si
Content be 0.15~0.35%.In some embodiments, the content of Si is 0.2~0.3%.
Wherein, Mn (manganese) is common solution strengthening element in good deoxidier and desulfurizing agent and steel, hot forming steel
In generally be not less than 1.00%.Mn can both have been combined with C to be formed a variety of carbide and plays the role of precipitation strength, and matrix is also dissolved in
Middle enhancing solid solution strengthening effect.Mn easily is combined to form high melting compound MnS with S, to eliminate or weaken caused by FeS
Hot-short phenomenon improves the hot-working character of steel.Mn can improve stabilization of austenite, and C curve is made to move to right, to significantly reduce horse
The critical cooling rate of family name's body.Therefore, select the content of Mn for 1.00~1.50wt%.In some embodiments, Mn contains
Amount is 1.10~1.3wt%.In some embodiments, the content of Mn is 1.1~1.2wt%.
Wherein, Cr (chromium) can significantly postpone pearlite and bainite transformation, to make austenite fully be changed into geneva
Body tissue.Since Cr has apparent cost advantage compared with Mo, so largely making an addition in hot forming steel.Therefore, containing for Cr is selected
Amount is 0.10~0.40wt%.In some embodiments, the content of Cr is 0.15~0.35wt%.In some embodiments
In, the content of Cr is 0.2~0.3wt%.
Wherein, V (vanadium) mainly exists in the form of VC (vanadium-carbon) in dual phase steel, has notable crystal grain refinement and disperse heavy
The effect that shallow lake is strengthened.In drop stamping heating process, undissolved vanadium-carbon particle can be with pinning ferrite grain boundaries, to play
The effect of crystal grain thinning；When annealing temperature increases to two-phase section, vanadium-carbon dissolution temperature is relatively low, therefore is completely dissolved in matrix, together
When solid solution C atoms be enriched with into austenite to improve its stability.Therefore, select the content of V for 0.01~0.10wt%.One
In a little embodiments, the content of V is 0.05~0.08wt%.In some embodiments, the content of V be 0.06~
0.08wt%.
Al (aluminium) is deoxidier common in steel, while can form AlN pinning crystal boundaries, to play the work of crystal grain thinning
With；In addition, Al is similar to Si effects, Carbide Precipitation can be inhibited, to make the fully rich carbon of austenite.Therefore, select Al's
Content is 0.01~0.06wt%.In some embodiments, the content of Al is 0.02~0.04wt%.In some embodiments
In, the content of Al is 0.03~0.04wt%.
Amid all these factors, present inventor passes through creative thinking and long-term experiment, the application embodiment
Each chemical composition, which matches, makes hot rolled steel plate substrate have preferably crystallized ability, v element is added in chemical composition, vanadium is logical
Crossing the modes such as crystal grain refinement and precipitation strength improves the comprehensive mechanical property of hot rolled steel plate substrate, is conducive to subsequent course of hot rolling
In obtain the high hot rolled steel plate steel sheet component of intensity.
In addition, in some embodiments, percentage, hot rolled steel plate is by following chemical composition：0.21~
0.23% C, 0.15~0.35% Si, 1.10~1.30% Mn, 0.15~0.35% Cr, 0.02~0.04%
Ti, 0.02~0.04% Al, 0.05~0.08% V, 0.002~0.0030% B ,≤0.015% P ,≤0.005%
S ,≤0.005% N and the Fe of surplus and inevitable impurity.
In some embodiments, percentage, hot rolled steel plate is by following chemical composition：0.22~0.23%
C, 0.2~0.3% Si, 1.10~1.20% Mn, 0.2~0.3% Cr, 0.03~0.04% Ti, 0.03~
0.04% Al, 0.06~0.08% V, 0.002~0.0030% B ,≤0.01% P ,≤0.003% S ,≤
The 0.005% N and Fe of surplus and inevitable impurity.
A kind of preparation method of above-mentioned hot rolled steel plate, including：The raw material formed with above-mentioned chemical composition is subjected to smelting
Refining, is cast as obtaining hot rolled steel plate substrate by hot rolling, section cooling after slab, wherein the finish rolling start rolling temperature of course of hot rolling
It it is 1000~1100 DEG C, finishing temperature is 850~950 DEG C.Coiling temperature is 550-650 DEG C.
It should be noted that chemical composition V and Fe are provided by molten iron in present embodiment, i.e., in molten iron just containing V and
Fe, without carrying out additional addition.Avoid the expensive microalloy elements such as addition Nb, Mo.In some embodiments, finish rolling
Start rolling temperature is 1050~1100 DEG C, and finishing temperature is 900~950 DEG C.
Further, in the present embodiment, to slab carry out hot rolling before, further include slab is heated, dephosphorization.
The hot rolled steel plate substrate being prepared through the above method, after testing, microstructure is by ferrite and pearlite group
At.
Further, further include：Above-mentioned hot rolled steel plate substrate is heated under conditions of 900-950 DEG C, then in 800-
It is hot press-formed under conditions of 850 DEG C, then quenching treatment is carried out under conditions of >=20 DEG C/s.In some embodiments,
Hot press-formed temperature is 810-830 DEG C.
Due to preferable through hot rolled steel plate substrate comprehensive mechanical property made from present embodiment, hot rolled steel plate substrate is in Re Chong
When pressing formation is hot rolled steel plate component intensity preferably hot rolled steel plate component is can be obtained without carrying out temper.Wherein, hot
Ferrite is inhibited to be precipitated by B after forming and quenching, while Mn, Cr improve quenching degree, and hot forming steel is made to obtain single geneva
Body tissue.
After testing, hot rolled steel plate component made from present embodiment, microstructure are made of single martensite, thus are had
There is preferable intensity.
The feature and performance of the present invention are described in further detail with reference to embodiments.
Embodiment 1
Prepare the raw material with following chemical composition：The Mn of Si, 1.50wt% of C, 0.40wt% of 0.20wt%,
B, 0.018wt%'s of V, 0.0035wt% of Al, 0.01wt% of Ti, 0.02wt% of Cr, 0.01wt% of 0.10wt%
P, the N of S, 0.005wt% of 0.006wt% and the Fe of surplus and inevitable impurity.
Raw material is smelted, slab is then cast as, slab is heated under conditions of 1230 DEG C, then dephosphorization, heat
The hot rolled steel plate substrate for rolling and obtaining 3mm thickness after section cooling.Wherein, finish rolling start rolling temperature is 1000 DEG C, finishing temperature 850
DEG C, coiling temperature is 550 DEG C.
Above-mentioned hot rolled steel plate substrate is heated under conditions of 950 DEG C, then under conditions of 850 DEG C drop stamping at
Then shape carries out quenching treatment under conditions of 30 DEG C/s and obtains hot rolled steel plate component.
Embodiment 2
Prepare the raw material with following chemical composition：Mn, 0.4wt% of Si, 1wt% of C, 0.1wt% of 0.25wt%
Cr, 0.04wt% Ti, 0.06wt% Al, 0.1wt% V, 0.0015wt% B, 0.015wt% P,
The N of S, 0.005wt% of 0.005wt% and the Fe of surplus and inevitable impurity.
Raw material is smelted, slab is then cast as, slab is heated under conditions of 1220 DEG C, then dephosphorization, heat
The hot rolled steel plate substrate for rolling and obtaining 2mm thickness after section cooling.Wherein, finish rolling start rolling temperature is 1100 DEG C, finishing temperature 950
DEG C, coiling temperature is 650 DEG C.
Above-mentioned hot rolled steel plate substrate is heated under conditions of 950 DEG C, then under conditions of 850 DEG C drop stamping at
Then shape carries out quenching treatment under conditions of 25 DEG C/s and obtains hot rolled steel plate component.
Embodiment 3
Prepare the raw material with following chemical composition：The Mn of Si, 1wt% of C, 0.15wt% of 0.21wt%,
The P of B, 0.01wt% of V, 0.002wt% of Al, 0.06wt% of Ti, 0.04wt% of Cr, 0.02wt% of 0.35wt%,
The N of S, 0.005wt% of 0.005wt% and the Fe of surplus and inevitable impurity.
Raw material is smelted, slab is then cast as, slab is heated under conditions of 1200 DEG C, then dephosphorization, heat
The hot rolled steel plate substrate for rolling and obtaining 3mm thickness after section cooling.Wherein, finish rolling start rolling temperature is 1050 DEG C, finishing temperature 900
DEG C, coiling temperature is 600 DEG C.
Above-mentioned hot rolled steel plate substrate is heated under conditions of 930 DEG C, then under conditions of 830 DEG C drop stamping at
Then shape carries out quenching treatment under conditions of 25 DEG C/s and obtains hot rolled steel plate component.
Embodiment 4
Prepare the raw material with following chemical composition：The Mn of Si, 1.3wt% of C, 0.35wt% of 0.23wt%,
The P of B, 0.008wt% of V, 0.003wt% of Al, 0.05wt% of Ti, 0.02wt% of Cr, 0.04wt% of 0.15wt%,
The N of S, 0.004wt% of 0.003wt% and the Fe of surplus and inevitable impurity.
Raw material is smelted, slab is then cast as, slab is heated under conditions of 1220 DEG C, then dephosphorization, heat
The hot rolled steel plate substrate for rolling and obtaining 3mm thickness after section cooling.Wherein, finish rolling start rolling temperature is 1100 DEG C, finishing temperature 930
DEG C, coiling temperature is 620 DEG C.
Above-mentioned hot rolled steel plate substrate is heated under conditions of 950 DEG C, then under conditions of 820 DEG C drop stamping at
Then shape carries out quenching treatment under conditions of 20 DEG C/s and obtains hot rolled steel plate component.
Embodiment 5
Prepare the raw material with following chemical composition：The Mn of Si, 1.1wt% of C, 0.2wt% of 0.22wt%,
The P of B, 0.008wt% of V, 0.002wt% of Al, 0.08wt% of Ti, 0.04wt% of Cr, 0.04wt% of 0.2wt%,
The N of S, 0.004wt% of 0.002wt% and the Fe of surplus and inevitable impurity.
Raw material is smelted, slab is then cast as, slab is heated under conditions of 1210 DEG C, then dephosphorization, heat
The hot rolled steel plate substrate for rolling and obtaining 2mm thickness after section cooling.Wherein, finish rolling start rolling temperature is 1000 DEG C, finishing temperature 900
DEG C, coiling temperature is 610 DEG C.
Above-mentioned hot rolled steel plate substrate is heated under conditions of 900 DEG C, then under conditions of 810 DEG C drop stamping at
Then shape carries out quenching treatment under conditions of 25 DEG C/s and obtains hot rolled steel plate component.
Embodiment 6
Prepare the raw material with following chemical composition：The Mn of Si, 1.2wt% of C, 0.3wt% of 0.23wt%,
The P of B, 0.007wt% of V, 0.003wt% of Al, 0.07wt% of Ti, 0.03wt% of Cr, 0.03wt% of 0.3wt%,
The N of S, 0.003wt% of 0.002wt% and the Fe of surplus and inevitable impurity.
Raw material is smelted, slab is then cast as, slab is heated under conditions of 1220 DEG C, then dephosphorization, heat
The hot rolled steel plate substrate for rolling and obtaining 2mm thickness after section cooling.Wherein, finish rolling start rolling temperature is 1100 DEG C, finishing temperature 900
DEG C, coiling temperature is 650 DEG C.
Above-mentioned hot rolled steel plate substrate is heated under conditions of 950 DEG C, then under conditions of 800 DEG C drop stamping at
Then shape carries out quenching treatment under conditions of 25 DEG C/s and obtains hot rolled steel plate component.
Test example 1
The micro-organization chart of hot rolled steel plate substrate and hot rolled steel plate component to embodiment 1 tests, test result
It please respectively refer to Fig. 1 and Fig. 2.
Wherein, Fig. 1 shows the micro-organization chart of hot rolled steel plate substrate, from figure 1 it appears that hot rolled steel plate substrate
Microstructure is made of ferrite and pearlite.
Fig. 2 shows the micro-organization charts of hot rolled steel plate component.From figure 2 it can be seen that hot rolled steel plate component is microcosmic
Tissue is made of single martensite.
Test example 2
Hot rolled steel plate substrate and hot rolled steel plate component to embodiment 1 and embodiment 2 carry out Mechanics Performance Testing, result
Please refer to Tables 1 and 2.
The mechanical property of the hot rolled steel plate substrate of 1 embodiment 1 of table and embodiment 2
From the results shown in Table 1, it the yield strength, tensile strength of the hot rolled steel plate substrate of the embodiment of the present invention and stretches
Long rate is more excellent.
The mechanical property of the hot rolled steel plate component of 2 embodiment 1 of table and embodiment 2
From the results shown in Table 2, it the yield strength, tensile strength of the hot rolled steel plate component of the embodiment of the present invention and stretches
Long rate is also all preferable.
In conclusion in hot rolled steel plate of sheet of the embodiment of the present invention and preparation method thereof, the v element of addition passes through crystal grain
The modes such as refinement and precipitation strength improve the mechanics ability of hot rolled steel plate substrate, are conducive to obtain intensity in subsequent course of hot rolling
High hot rolled steel plate steel sheet component.The expensive microalloy elements such as addition Nb, Mo are avoided, cost has been saved.
Embodiments described above is a part of the embodiment of the present invention, instead of all the embodiments.The reality of the present invention
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of the selected implementation of the present invention
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Claims (10)
1. a kind of hot rolled steel plate, which is characterized in that by mass percentage, the hot rolled steel plate is made of following chemical composition：
0.20~0.25% C, 0.10~0.40% Si, 1.00~1.50% Mn, 0.10~0.40% Cr, 0.01~
0.04% Ti, 0.01~0.06% Al, 0.01~0.10% V, 0.0015~0.0035% B ,≤0.020% P,
≤ 0.010% S ,≤0.006% N and the Fe of surplus and inevitable impurity.
2. hot rolled steel plate according to claim 1, which is characterized in that by mass percentage, the hot rolled steel plate by with
Lower chemical composition：0.21~0.23% C, 0.15~0.35% Si, 1.10~1.30% Mn, 0.15~0.35%
Cr, 0.02~0.04% Ti, 0.02~0.04% Al, 0.05~0.08% V, 0.002~0.0030% B ,≤
0.015% P ,≤0.005% S ,≤0.005% N and the Fe of surplus and inevitable impurity.
3. hot rolled steel plate according to claim 1, which is characterized in that by mass percentage, the hot rolled steel plate by with
Lower chemical composition：0.22~0.23% C, 0.2~0.3% Si, 1.10~1.20% Mn, 0.2~0.3% Cr,
0.03~0.04% Ti, 0.03~0.04% Al, 0.06~0.08% V, 0.002~0.0030% B ,≤0.01%
P ,≤0.003% S ,≤0.005% N and the Fe of surplus and inevitable impurity.
4. a kind of preparation method of hot rolled steel plate as described in any one of claims 1-3, which is characterized in that including：To have
The raw material of the chemical composition composition is smelted, and is cast as obtaining hot rolled steel plate substrate by hot rolling, section cooling after slab,
Wherein, the finish rolling start rolling temperature of the course of hot rolling is 1000~1100 DEG C, and finishing temperature is 850~950 DEG C.
5. the preparation method of hot rolled steel plate according to claim 4, which is characterized in that the finish rolling start rolling temperature is 1050
~1100 DEG C, finishing temperature is 900~950 DEG C.
6. the preparation method of hot rolled steel plate according to claim 4, which is characterized in that the coiling temperature of the course of hot rolling
It is 550-650 DEG C.
7. the preparation method of hot rolled steel plate according to claim 4, which is characterized in that the slab carry out hot rolling it
Before, further include the slab is heated, dephosphorization.
8. the preparation method of hot rolled steel plate according to claim 4, which is characterized in that the V in the chemical composition and Fe
It is provided by molten iron.
9. the preparation method of hot rolled steel plate according to claim 4, which is characterized in that including：By the hot rolled steel plate base
Plate heats under conditions of 900-950 DEG C, then hot press-formed under conditions of 800-850 DEG C, then >=20 DEG C/s's
Under the conditions of carry out quenching treatment.
10. the preparation method of hot rolled steel plate according to claim 9, which is characterized in that the hot press-formed temperature is
810-830℃。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810429327.9A CN108546876A (en) | 2018-05-07 | 2018-05-07 | A kind of hot rolled steel plate and preparation method thereof |
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| CN201810429327.9A CN108546876A (en) | 2018-05-07 | 2018-05-07 | A kind of hot rolled steel plate and preparation method thereof |
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| CN108546876A true CN108546876A (en) | 2018-09-18 |
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| CN201810429327.9A Pending CN108546876A (en) | 2018-05-07 | 2018-05-07 | A kind of hot rolled steel plate and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706377A (en) * | 2019-03-01 | 2019-05-03 | 本钢板材股份有限公司 | A kind of the think gauge PHS1500 steel and its production technology of suitable hot forming processing |
| CN114657466A (en) * | 2022-03-14 | 2022-06-24 | 武汉钢铁有限公司 | Large-width-to-thickness-ratio high-strength steel and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031455A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Steel sheet for press quenching and method for producing same |
| CN105803321A (en) * | 2016-03-23 | 2016-07-27 | 攀钢集团攀枝花钢铁研究院有限公司 | 980 MPa-level vanadium-contained ultrafine grain cold rolled dual-phase steel and preparing method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031455A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Steel sheet for press quenching and method for producing same |
| CN105803321A (en) * | 2016-03-23 | 2016-07-27 | 攀钢集团攀枝花钢铁研究院有限公司 | 980 MPa-level vanadium-contained ultrafine grain cold rolled dual-phase steel and preparing method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706377A (en) * | 2019-03-01 | 2019-05-03 | 本钢板材股份有限公司 | A kind of the think gauge PHS1500 steel and its production technology of suitable hot forming processing |
| CN114657466A (en) * | 2022-03-14 | 2022-06-24 | 武汉钢铁有限公司 | Large-width-to-thickness-ratio high-strength steel and production method thereof |
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