CN109266828A - DRD-8 shallowly rushes two-piece can hot rolled strip and its production method - Google Patents
DRD-8 shallowly rushes two-piece can hot rolled strip and its production method Download PDFInfo
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- CN109266828A CN109266828A CN201811330873.3A CN201811330873A CN109266828A CN 109266828 A CN109266828 A CN 109266828A CN 201811330873 A CN201811330873 A CN 201811330873A CN 109266828 A CN109266828 A CN 109266828A
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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
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C21D2211/009—Pearlite
Abstract
The invention discloses a kind of DRD-8 shallowly to rush two-piece can hot rolled strip and its production method, the chemical component of the hot rolled strip forms and its mass percentage are as follows: C:0.06~0.08%, Mn:0.27~0.33%, S≤0.012%, P≤0.020%, Si≤0.020%, Als:0.020~0.060%, N≤0.0040%, remaining is iron and inevitable impurity；The production method of the hot rolled strip includes steel-making, hot rolling and cooling process.The present invention uses three-stage cooling technique, it ensure that the performance of different coil of strip products is stablized, under conditions of proof strength, elongation percentage A50 > 33%, 9~10 grades of grain size, grain size number improves 1~2 grade compared with conventional chilling technology, it is more advantageous to the production and application of downstream cold rolling user, do not increase cost compared with conventional production process, is conducive to improve occupation rate of market, can produce great economic benefit.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of DRD-8 shallowly rushes two-piece can hot rolled strip and its production
Method.
Background technique
Two-piece can, without welding during tank processed, saves coating inside and outside weld seam, steel wire etc. compared with traditional three-piece can
Material, evaded tank body welding, reduce at bottom cover seaming existing for weak link, while improving stock utilization, reduce
The generation of solid waste, enriches food mental package battle array, greatly improves the quality of food mental package.
In recent years, in terms of canned food, the trend constantly risen is presented in China's can yield, but amplification slows down.2013
Year domestic 11,640,000 tons of yield of can, increases by 11.6% on a year-on-year basis.Can yield in 2014 is 12,560,000 tons, increases by 8.0% on a year-on-year basis.I
The trend constantly risen is presented in state's can yield, and DRD tank etc. shallowly rushes two-piece can wide market.
The annealing process of most of tinplate producer is bell-type annealing at this stage, relative to continuous annealing, bell-type annealing work
The product of skill production will receive " heredity " in the metallographic structure and performance of hot-rolled product influence.For reduction " heredity " influence, cover
It moves back producer mostly to develop two-piece can product using twice annealed technique, but twice annealed technique not only production cycle
It is long, and the cost is relatively high.
Tinplate manufacturer has started the experimental study of cover annealing production two-piece can at present, but all only to cold-rolling process
Adjustment, fail exploitation.For the successful exploitation for guaranteeing final products, need to reduce or produce hot rolling as far as possible using cover annealing
" heredity " of product, therefore hot-rolled product needs while proof strength, should have relatively thinner crystal grain and higher elongation percentage.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of DRD-8 shallowly to rush two-piece can hot rolled strip；The present invention also mentions
The production method of two-piece can hot rolled strip is shallowly rushed for a kind of DRD-8.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of DRD-8 shallowly rushes two-piece can hot-rolled steel
Band, the chemical component composition and its mass percentage of the hot rolled strip are as follows: C:0.06~0.08%, Mn:0.27~0.33%,
S≤0.012%, P≤0.020%, Si≤0.020%, Als:0.020~0.060%, N≤0.0040%, remaining is iron and can not keep away
The impurity exempted from.
Hot rolled strip of the present invention is organized with a thickness of 1.8~3.5mm as ferrite+pearlite, grain size number 9
~10 grades.
Hot rolled strip tensile strength Rm:345~470MPa of the present invention, yield strength Rel:245~400MPa extend
Rate A50 > 33%.
The present invention also provides the production method that a kind of DRD-8 shallowly rushes two-piece can hot rolled strip, the production method packet
Include steel-making, hot rolling and cooling process；The hot-rolled process, including heat and roll；The cooling process, using three-stage cooling mould
Formula, the strong cold preceding temperature of steel band is 850~890 DEG C, is cooled to 700~740 by force through section cooling with the speed of 30~70 DEG C/s first
DEG C, then air-cooled 1.5~4.0s, it is air-cooled after steel band coiling temperature is cooled to by force through section cooling again with the speed of 20~40 DEG C/s
430~530 DEG C.
Steel making working procedure of the present invention, using the smelting process of clean steel, the chemical component composition and its matter of molten steel of tapping
Measure percentage composition are as follows: C:0.06~0.08%, Mn:0.27~0.33%, S≤0.012%, P≤0.020%, Si≤0.020%, Als:
0.020~0.060%, N≤0.0040%, remaining is iron and inevitable impurity.
Hot-rolled process of the present invention, slab heating temperature are 1180~1300 DEG C.
Hot-rolled process of the present invention, enters Coil Box after five passage roughing by 1060~1120 DEG C of roughing start rolling temperature
It batches, through seven rack hot continuous rollings after de-scaling, and uses lubrication and rolling, 1040~1060 DEG C of finish rolling start rolling temperature, finishing temperature 850
~890 DEG C.
Cooling process of the present invention, obtains DRD-8 and shallowly rushes two-piece can heat by 430~530 DEG C of coiling temperature after curling
Strip rolling.
DRD-8 of the present invention shallowly rushes two-piece can hot rolled strip product standard with reference to Q/TB 501；Properties of product detection method
Canonical reference GB/T 228.
The beneficial effects of adopting the technical scheme are that the 1, present invention is by the slab after molten iron smelting, continuous casting
Carry out controlled rolling and controlled cooling, austenite transformation near Curie temperature use air-cooled cooling technique, improve ferrite be precipitated size and
Ratio controls the precipitation ratio of pearlite, product the tensile strength Rm:345~470MPa, yield strength Rel:245 produced
~400MPa, elongation percentage A50 > 33%.2, the present invention uses three-stage cooling technique, ensure that the performance of different coil of strip products is steady
Fixed, under conditions of proof strength, elongation percentage A50 > 33%, 9~10 grades of grain size, grain size number is mentioned compared with conventional chilling technology
It is 1~2 grade high, it is more advantageous to the production and application of downstream cold rolling user, does not increase cost compared with conventional production process, is conducive to improve city
Field occupation rate, can produce great economic benefit.
Detailed description of the invention
Fig. 1 is the metallographic structure figure of 1 hot rolled strip of embodiment；
Fig. 2 is the metallographic structure figure of 2 hot rolled strip of embodiment；
Fig. 3 is the metallographic structure figure of 3 hot rolled strip of embodiment；
Fig. 4 is the metallographic structure figure of 4 hot rolled strip of embodiment；
Fig. 5 is the metallographic structure figure of 5 hot rolled strip of embodiment；
Fig. 6 is the metallographic structure figure of 6 hot rolled strip of embodiment；
Fig. 7 is the metallographic structure figure of 7 hot rolled strip of embodiment.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
The present embodiment DRD-8 rushes two-piece can hot rolled strip shallowly with a thickness of 3.0mm, chemical component composition and mass percentage
Are as follows: C:0.07%, Mn:0.30%, S:0.008%, P:0.012%, Si:0.010%, Als:0.040%, N:0.0024%, remaining is iron
With inevitable impurity.
The production method that the present embodiment DRD-8 shallowly rushes two-piece can hot rolled strip includes steel-making, hot rolling and cooling process, tool
That steps are as follows is described for body technology:
(1) steel making working procedure: using the smelting process of clean steel, the chemical component composition and its mass percentage of molten steel of tapping
Are as follows: C:0.07%, Mn:0.30%, S:0.008%, P:0.012%, Si:0.010%, Als:0.040%, N:0.0024%, remaining is iron
With inevitable impurity；
(2) hot-rolled process: slab heating temperature is 1190 DEG C；1090 DEG C of roughing start rolling temperature, heat is entered after five passage roughing
Volume case batches, and through seven rack hot continuous rollings after de-scaling, and uses lubrication and rolling, and 1045 DEG C of finish rolling start rolling temperature, finishing temperature 870
℃；
(3) cooling process: three-stage cooling mode is used, the strong cold preceding temperature of steel band is 860 DEG C, first with the speed of 40 DEG C/s through layer
Stream cooling is cooled to 730 DEG C by force, then air-cooled 2.0s, it is air-cooled after steel band volume is cooled to by force through section cooling again with the speed of 25 DEG C/s
480 DEG C of temperature are taken, i.e. obtaining DRD-8 shallowly rushes two-piece can hot rolled strip after curling.
DRD-8 obtained by the present embodiment shallowly rushes the mechanical property of two-piece can hot rolled strip: tensile strength 428MPa, surrender are strong
Spend 322MPa, elongation percentage A50:43%；Fig. 1 be gained hot rolled strip metallographic structure, as seen from Figure 1, tissue be ferrite+
Pearlite, grain size number are 10 grades.
Embodiment 2
The present embodiment DRD-8 rushes two-piece can hot rolled strip shallowly with a thickness of 1.8mm, chemical component composition and mass percentage
Are as follows: C:0.08%, Mn:0.33%, S:0.010%, P:0.018%, Si:0.020%, Als:0.033%, N:0.0032%, remaining is iron
With inevitable impurity.
The production method that the present embodiment DRD-8 shallowly rushes two-piece can hot rolled strip includes steel-making, hot rolling and cooling process, tool
That steps are as follows is described for body technology:
(1) steel making working procedure: using the smelting process of clean steel, the chemical component composition and its mass percentage of molten steel of tapping
Are as follows: C:0.08%, Mn:0.33%, S:0.010%, P:0.018%, Si:0.020%, Als:0.033%, N:0.0032%, remaining is iron
With inevitable impurity；
(2) hot-rolled process: slab heating temperature is 1210 DEG C；1070 DEG C of roughing start rolling temperature, heat is entered after five passage roughing
Volume case batches, and through seven rack hot continuous rollings after de-scaling, and uses lubrication and rolling, and 1060 DEG C of finish rolling start rolling temperature, finishing temperature 880
℃；
(3) cooling process: three-stage cooling mode is used, the strong cold preceding temperature of steel band is 870 DEG C, first with the speed of 60 DEG C/s through layer
Stream cooling is cooled to 710 DEG C by force, then air-cooled 3.0s, it is air-cooled after steel band volume is cooled to by force through section cooling again with the speed of 30 DEG C/s
450 DEG C of temperature are taken, i.e. obtaining DRD-8 shallowly rushes two-piece can hot rolled strip after curling.
DRD-8 obtained by the present embodiment shallowly rushes the mechanical property of two-piece can hot rolled strip: tensile strength 443MPa, surrender are strong
Spend 342MPa, elongation percentage A50:39%；Fig. 2 be gained hot rolled strip metallographic structure, from Figure 2 it can be seen that its tissue be ferrite+
Pearlite, grain size number are 10 grades.
Embodiment 3
The present embodiment DRD-8 rushes two-piece can hot rolled strip shallowly with a thickness of 2.0mm, chemical component composition and mass percentage
Are as follows: C:0.06%, Mn:0.27%, S:0.012%, P:0.015%, Si:0.010%, Als:0.060%, N:0.0040%, remaining is iron
With inevitable impurity.
The production method that the present embodiment DRD-8 shallowly rushes two-piece can hot rolled strip includes steel-making, hot rolling and cooling process, tool
That steps are as follows is described for body technology:
(1) steel making working procedure: using the smelting process of clean steel, the chemical component composition and its mass percentage of molten steel of tapping
Are as follows: C:0.06%, Mn:0.27%, S:0.012%, P:0.015%, Si:0.010%, Als:0.060%, N:0.0040%, remaining is iron
With inevitable impurity；
(2) hot-rolled process: slab heating temperature is 1250 DEG C；1090 DEG C of roughing start rolling temperature, heat is entered after five passage roughing
Volume case batches, and through seven rack hot continuous rollings after de-scaling, and uses lubrication and rolling, and 1055 DEG C of finish rolling start rolling temperature, finishing temperature 860
℃；
(3) cooling process: three-stage cooling mode is used, the strong cold preceding temperature of steel band is 850 DEG C, first with the speed of 45 DEG C/s through layer
Stream cooling is cooled to 740 DEG C by force, then air-cooled 2.5s, it is air-cooled after steel band volume is cooled to by force through section cooling again with the speed of 25 DEG C/s
510 DEG C of temperature are taken, i.e. obtaining DRD-8 shallowly rushes two-piece can hot rolled strip after curling.
DRD-8 obtained by the present embodiment shallowly rushes the mechanical property of two-piece can hot rolled strip: tensile strength 409MPa, surrender are strong
Spend 314MPa, elongation percentage A50:47%；Fig. 3 be gained hot rolled strip metallographic structure, as seen from Figure 3, tissue be ferrite+
Pearlite, grain size number are 9 grades.
Embodiment 4
The present embodiment DRD-8 rushes two-piece can hot rolled strip shallowly with a thickness of 3.5mm, chemical component composition and mass percentage
Are as follows: C:0.06%, Mn:0.29%, S:0.011%, P:0.020%, Si:0.020%, Als:0.040%, N:0.0030%, remaining is iron
With inevitable impurity.
The production method that the present embodiment DRD-8 shallowly rushes two-piece can hot rolled strip includes steel-making, hot rolling and cooling process, tool
That steps are as follows is described for body technology:
(1) steel making working procedure: using the smelting process of clean steel, the chemical component composition and its mass percentage of molten steel of tapping
Are as follows: C:0.06%, Mn:0.29%, S:0.011%, P:0.020%, Si:0.020%, Als:0.040%, N:0.0030%, remaining is iron
With inevitable impurity；
(2) hot-rolled process: slab heating temperature is 1280 DEG C；1070 DEG C of roughing start rolling temperature, heat is entered after five passage roughing
Volume case batches, and through seven rack hot continuous rollings after de-scaling, and uses lubrication and rolling, and 1045 DEG C of finish rolling start rolling temperature, finishing temperature 875
℃；
(3) cooling process: three-stage cooling mode is used, the strong cold preceding temperature of steel band is 860 DEG C, first with the speed of 50 DEG C/s through layer
Stream cooling is cooled to 735 DEG C by force, then air-cooled 1.5s, it is air-cooled after steel band volume is cooled to by force through section cooling again with the speed of 20 DEG C/s
490 DEG C of temperature are taken, i.e. obtaining DRD-8 shallowly rushes two-piece can hot rolled strip after curling.
DRD-8 obtained by the present embodiment shallowly rushes the mechanical property of two-piece can hot rolled strip: tensile strength 419MPa, surrender are strong
Spend 322MPa, elongation percentage A50:44%；Fig. 4 be gained hot rolled strip metallographic structure, from fig. 4, it can be seen that its tissue be ferrite+
Pearlite, grain size number are 9 grades.
Embodiment 5
The present embodiment DRD-8 rushes two-piece can hot rolled strip shallowly with a thickness of 3.5mm, chemical component composition and mass percentage
Are as follows: C:0.08%, Mn:0.31%, S:0.011%, P:0.019%, Si:0.010%, Als:0.020%, N:0.0021%, remaining is iron
With inevitable impurity.
The production method that the present embodiment DRD-8 shallowly rushes two-piece can hot rolled strip includes steel-making, hot rolling and cooling process, tool
That steps are as follows is described for body technology:
(1) steel making working procedure: using the smelting process of clean steel, the chemical component composition and its mass percentage of molten steel of tapping
Are as follows: C:0.08%, Mn:0.31%, S:0.011%, P:0.019%, Si:0.010%, Als:0.020%, N:0.0021%, remaining is iron
With inevitable impurity；
(2) hot-rolled process: slab heating temperature is 1220 DEG C；1100 DEG C of roughing start rolling temperature, heat is entered after five passage roughing
Volume case batches, and through seven rack hot continuous rollings after de-scaling, and uses lubrication and rolling, and 1060 DEG C of finish rolling start rolling temperature, finishing temperature 865
℃；
(3) cooling process: three-stage cooling mode is used, the strong cold preceding temperature of steel band is 855 DEG C, first with the speed of 60 DEG C/s through layer
Stream cooling is cooled to 700 DEG C by force, then air-cooled 4.0s, it is air-cooled after steel band volume is cooled to by force through section cooling again with the speed of 40 DEG C/s
450 DEG C of temperature are taken, i.e. obtaining DRD-8 shallowly rushes two-piece can hot rolled strip after curling.
DRD-8 obtained by the present embodiment shallowly rushes the mechanical property of two-piece can hot rolled strip: tensile strength 431MPa, surrender are strong
Spend 342MPa, elongation percentage A50:41%；Fig. 5 be gained hot rolled strip metallographic structure, as seen from Figure 5, tissue be ferrite+
Pearlite, grain size number are 10 grades.
Embodiment 6
The present embodiment DRD-8 rushes two-piece can hot rolled strip shallowly with a thickness of 2.5mm, chemical component composition and mass percentage
Are as follows: C:0.06%, Mn:0.29%, S:0.007%, P:0.013%, Si:0.015%, Als:0.030%, N:0.0031%, remaining is iron
With inevitable impurity.
The production method that the present embodiment DRD-8 shallowly rushes two-piece can hot rolled strip includes steel-making, hot rolling and cooling process, tool
That steps are as follows is described for body technology:
(1) steel making working procedure: using the smelting process of clean steel, the chemical component composition and its mass percentage of molten steel of tapping
Are as follows: C:0.06%, Mn:0.29%, S:0.007%, P:0.013%, Si:0.015%, Als:0.030%, N:0.0031%, remaining is iron
With inevitable impurity；
(2) hot-rolled process: slab heating temperature is 1300 DEG C；1060 DEG C of roughing start rolling temperature, heat is entered after five passage roughing
Volume case batches, and through seven rack hot continuous rollings after de-scaling, and uses lubrication and rolling, and 1040 DEG C of finish rolling start rolling temperature, finishing temperature 890
℃；
(3) cooling process: three-stage cooling mode is used, the strong cold preceding temperature of steel band is 875 DEG C, first with the speed of 30 DEG C/s through layer
Stream cooling is cooled to 720 DEG C by force, then air-cooled 2.0s, it is air-cooled after steel band volume is cooled to by force through section cooling again with the speed of 25 DEG C/s
430 DEG C of temperature are taken, i.e. obtaining DRD-8 shallowly rushes two-piece can hot rolled strip after curling.
DRD-8 obtained by the present embodiment shallowly rushes the mechanical property of two-piece can hot rolled strip: tensile strength 348MPa, surrender are strong
Spend 246MPa, elongation percentage A50:34%；Fig. 6 be gained hot rolled strip metallographic structure, as seen from Figure 6, tissue be ferrite+
Pearlite, grain size number are 9.5 grades.
Embodiment 7
The present embodiment DRD-8 rushes two-piece can hot rolled strip shallowly with a thickness of 2.8mm, chemical component composition and mass percentage
Are as follows: C:0.08%, Mn:0.30%, S:0.010%, P:0.011%, Si:0.008%, Als:0.050%, N:0.0026%, remaining is iron
With inevitable impurity.
The production method that the present embodiment DRD-8 shallowly rushes two-piece can hot rolled strip includes steel-making, hot rolling and cooling process, tool
That steps are as follows is described for body technology:
(1) steel making working procedure: using the smelting process of clean steel, the chemical component composition and its mass percentage of molten steel of tapping
Are as follows: C:0.08%, Mn:0.30%, S:0.010%, P:0.011%, Si:0.008%, Als:0.050%, N:0.0026%, remaining is iron
With inevitable impurity；
(2) hot-rolled process: slab heating temperature is 1180 DEG C；1120 DEG C of roughing start rolling temperature, heat is entered after five passage roughing
Volume case batches, and through seven rack hot continuous rollings after de-scaling, and uses lubrication and rolling, and 1050 DEG C of finish rolling start rolling temperature, finishing temperature 850
℃；
(3) cooling process: use three-stage cooling mode: the strong cold preceding temperature of steel band is 890 DEG C, first with the speed of 70 DEG C/s through layer
Stream cooling is cooled to 730 DEG C by force, then air-cooled 2.5s, it is air-cooled after steel band volume is cooled to by force through section cooling again with the speed of 30 DEG C/s
530 DEG C of temperature are taken, i.e. obtaining DRD-8 shallowly rushes two-piece can hot rolled strip after curling.
DRD-8 obtained by the present embodiment shallowly rushes the mechanical property of two-piece can hot rolled strip: tensile strength 469MPa, surrender are strong
Spend 398MPa, elongation percentage A50:36%；Fig. 7 be gained hot rolled strip metallographic structure, as seen from Figure 7, tissue be ferrite+
Pearlite, grain size number are 9.5 grades.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that: still the present invention can be modified or be waited
With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention
In sharp claimed range.
Claims (8)
1. a kind of DRD-8 shallowly rushes two-piece can hot rolled strip, which is characterized in that the chemical component of the hot rolled strip form and its
Mass percentage are as follows: C:0.06~0.08%, Mn:0.27~0.33%, S≤0.012%, P≤0.020%, Si≤0.020%,
Als:0.020~0.060%, N≤0.0040%, remaining is iron and inevitable impurity.
2. a kind of DRD-8 according to claim 1 shallowly rushes two-piece can hot rolled strip, which is characterized in that the hot-rolled steel
Tape thickness is 1.8~3.5mm, is organized as ferrite+pearlite, and grain size number is 9~10 grades.
3. a kind of DRD-8 according to claim 1 shallowly rushes two-piece can hot rolled strip, which is characterized in that the hot-rolled steel
Band tensile strength Rm:345~470MPa, yield strength Rel:245~400MPa, elongation percentage A50 > 33%.
4. the production method of two-piece can hot rolled strip is shallowly rushed based on a kind of DRD-8 described in claim 1-3 any one,
It is characterized in that, the production method includes steel-making, hot rolling and cooling process；The hot-rolled process, including heat and roll；It is described
Cooling process uses three-stage cooling mode, and the strong cold preceding temperature of steel band is 850~890 DEG C, is passed through first with the speed of 30~70 DEG C/s
Section cooling is cooled to by force 700~740 DEG C, then air-cooled 1.5~4.0s, it is air-cooled after steel band passed through again with the speed of 20~40 DEG C/s
Section cooling is cooled to by force 430~530 DEG C of coiling temperature.
5. the production method that a kind of DRD-8 according to claim 4 shallowly rushes two-piece can hot rolled strip, which is characterized in that
The cooling process, 430~530 DEG C of coiling temperature, i.e. obtaining DRD-8 shallowly rushes two-piece can hot rolled strip after curling.
6. the production method that a kind of DRD-8 according to claim 4 shallowly rushes two-piece can hot rolled strip, which is characterized in that
The hot-rolled process, slab heating temperature are 1180~1300 DEG C.
7. a kind of DRD-8 according to claim 4-6 any one shallowly rushes the production method of two-piece can hot rolled strip,
It is characterized in that, the hot-rolled process, 1060~1120 DEG C of roughing start rolling temperature, is batched after five passage roughing into Coil Box,
Through seven rack hot continuous rollings after de-scaling, and lubrication and rolling is used, 1040~1060 DEG C of finish rolling start rolling temperature, finishing temperature 850~890
℃。
8. a kind of DRD-8 according to claim 4-6 any one shallowly rushes the production method of two-piece can hot rolled strip,
It is characterized in that, the steel making working procedure, using the smelting process of clean steel, the chemical component composition and its quality percentage of molten steel of tapping
Content are as follows: C:0.06~0.08%, Mn:0.27~0.33%, S≤0.012%, P≤0.020%, Si≤0.020%, Als:0.020
~0.060%, N≤0.0040%, remaining is iron and inevitable impurity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811330873.3A CN109266828A (en) | 2018-11-09 | 2018-11-09 | DRD-8 shallowly rushes two-piece can hot rolled strip and its production method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811330873.3A CN109266828A (en) | 2018-11-09 | 2018-11-09 | DRD-8 shallowly rushes two-piece can hot rolled strip and its production method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109778076A (en) * | 2019-02-12 | 2019-05-21 | 唐山不锈钢有限责任公司 | The production method of low-crackle sensitive S550MC Hot Rolling Automobile structural steel band |
| CN111266406A (en) * | 2020-03-02 | 2020-06-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Rolling method of ultrathin hot continuous rolling steel strip |
| CN112176166A (en) * | 2020-09-09 | 2021-01-05 | 唐山不锈钢有限责任公司 | Production method of high-yield-strength and high-elongation T-5 tinplate base plate |
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| CN109778076A (en) * | 2019-02-12 | 2019-05-21 | 唐山不锈钢有限责任公司 | The production method of low-crackle sensitive S550MC Hot Rolling Automobile structural steel band |
| CN111266406A (en) * | 2020-03-02 | 2020-06-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Rolling method of ultrathin hot continuous rolling steel strip |
| CN111266406B (en) * | 2020-03-02 | 2022-01-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Rolling method of ultrathin hot continuous rolling steel strip |
| CN112176166A (en) * | 2020-09-09 | 2021-01-05 | 唐山不锈钢有限责任公司 | Production method of high-yield-strength and high-elongation T-5 tinplate base plate |
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Application publication date: 20190125 |