CN105256240B - A kind of hot-rolled coil and its manufacture method - Google Patents
A kind of hot-rolled coil and its manufacture method Download PDFInfo
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- CN105256240B CN105256240B CN201510765220.8A CN201510765220A CN105256240B CN 105256240 B CN105256240 B CN 105256240B CN 201510765220 A CN201510765220 A CN 201510765220A CN 105256240 B CN105256240 B CN 105256240B
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Abstract
The present invention relates to hot rolling technique field, more particularly to a kind of hot-rolled coil and its manufacture method, the chemical composition of hot-rolled coil contain by weight percentage：C：0.05~0.10%, Si：0.10~0.30%, Mn：1.30~1.90%, P：≤ 0.015%, S≤0.004%, V：0.01~0.05%, Nb：0.04~0.065%, Cr：0.10~0.30%, Ti：0.010~0.050%, remaining is Fe and inevitable impurity.Method includes：Smelting, continuous casting, heating of plate blank, roughing, finish rolling, cooling and coiling process.Hot-rolled coil provided by the invention and its manufacture method, the low-temperature flexibility of hot-rolled sheet coil is ensure that by the composition design of low-carbon and low-sulphur.Meanwhile the Mo elements of costliness are not added in hot-rolled coil, reduce production cost.By effective control of heating of plate blank system, coordinate finish rolling stage non-recrystallization low temp area large deformation rolling mill practice, make impact ductile-brittle transition temperature FATT50≤60 DEG C of hot-rolled coil, DWTT ductile-brittle transition temperature≤60 DEG C, have the low-temperature flexibility of superelevation.
Description
Technical field
The present invention relates to hot rolling technique field, more particularly to a kind of hot-rolled coil and its manufacture method.
Background technology
Pipeline transportation is the most important mode of long distance delivery oil and natural gas, and the construction of part pipeline is needed by gas
Cold zone is waited, this low-temperature flexibility to pipe line steel proposes the requirement of higher.Current steel market situation is poor, and each steel mill exists
The market competition of the high-grade pipe line steels such as X70 is particularly fierce, and cost of alloy is reduced on the premise of how improving performance, so as to reduce
Overall production cost is particularly important.Described in the X70 pipe line steels and data of literatures occurred currently on the market
The low-temperature flexibility of X70 pipe line steels is poor, it is impossible to meets the performance requirement under low temperature environment, and existing X70 pipe line steels are given birth to
It is higher to produce cost, adds industrial input.
The content of the invention
The embodiment of the present invention solves hot-rolled coil in the prior art by providing a kind of hot-rolled coil and its manufacture method
The technical problem of toughness deficiency at low ambient temperatures, realizes the low-temperature flexibility for improving hot-rolled coil, and improves hot-rolled coil
The technique effect of intensity, formability and weldability so that using the natural-gas transfer pipeline of hot-rolled coil manufacture in worst cold case
Under safe and stable operation.
An embodiment of the present invention provides a kind of hot-rolled coil, the hot-rolled coil is X70 ranks, and the hot-rolled coil is used for
Manufacture natural-gas transfer pipeline；It is characterized in that, the chemical composition of the hot-rolled coil contains by weight percentage：C：0.05
~0.10%, Si：0.10~0.30%, Mn：1.30~1.90%, P：≤ 0.015%, S≤0.004%, V：0.01~
0.05%, Nb：0.04~0.065%, Cr：0.10~0.30%, Ti：0.010~0.050%, remaining is for Fe and unavoidably
Impurity.
Further, the internal structure of the hot-rolled coil is made of acicular ferrite, granular bainite and M/A.
The embodiment of the present invention additionally provides a kind of manufacture method of hot-rolled coil, and the hot-rolled coil is X70 ranks, described
Hot-rolled coil is used to manufacture natural-gas transfer pipeline；The described method includes：Heating of plate blank, roughing, finish rolling, cool down and batched
Journey；Wherein：
During the heating of plate blank, the heating time of control high temperature soak section is less than 50 minutes；Control the slab
The total time of heating is 180~300 minutes, and it is 1180~1210 DEG C to control the tapping temperature after the heating of plate blank.
In the rough rolling process, controlling the reduction ratio of each passage of the roughing gradually increases, and controls the roughing extreme trace
Secondary reduction ratio is more than 22%, and the outlet temperature for controlling the roughing is 900~1000 DEG C.
In the finishing stands, control the inlet temperature of the finish rolling to be less than or equal to 960 DEG C, control the finishing temperature to be
780~860 DEG C, the total deformation of the slab is controlled to be more than 70%.
The cooling procedure is controlled to use ultrafast cold, section cooling and cold sperm pattern.
Further, the ultrafast cold cooldown rate is more than 40 DEG C/s.
Further, control it is described it is ultrafast it is cold after the slab temperature be 480~560 DEG C.
Further, further include, in the coiling process, it is 360~420 DEG C to control coiling temperature.
Further, in the rough rolling process, the total passage for controlling the roughing is 6~8 passages.
One or more technical solution provided in an embodiment of the present invention, at least possesses following beneficial effect or advantage：
1st, hot-rolled coil provided in an embodiment of the present invention, C content is 0.05~0.10%, S contents are less than 0.004%, is led to
The composition design for crossing low-carbon and low-sulphur ensure that the low-temperature flexibility of hot-rolled sheet coil.Hot-rolled coil is using elements such as Mn, Cr, Nb, V and Ti
Complex intensifying, the internal structure of hot-rolled coil are made of acicular ferrite, granular bainite and M/A, further increase
The intensity and toughness of hot-rolled sheet coil.Meanwhile the Mo elements of costliness are not added in hot-rolled coil, reduce production cost.
2nd, the manufacture method of hot-rolled coil provided in an embodiment of the present invention, during heating of plate blank, controls high temperature soak
The heating time of section is less than 50 minutes, prevents the original austenite grains of slab to be too roughened, it is ensured that it is with relatively low tough crisp
Transition temperature.Make each percentage pass reduction of rough rolling step gradually increase, control entry temperature at finishing is less than or equal to 960 DEG C, and makes
Slab is more than 70% in the reduction ratio of finish rolling section, ensures that slab carries out large deformation in non-recrystallization zone, increases Effective grain size ruler
Very little quantity, improves the low-temperature flexibility of hot-rolled coil.The manufacture method of hot-rolled coil provided in an embodiment of the present invention, cooling procedure
Using ultrafast cold, section cooling and cold sperm pattern, and ultrafast cold cooldown rate is controlled to be more than 40 DEG C/s, ultrafast cold fast quickly cooling
But ability compensate for the loss that Cr elements reduce (Cr contents are 0.10~0.30%) and the quenching degree brought without Mo elements, can
Acicular ferrite, granular bainite and M/A tissues are obtained, the low temperature with superelevation is tough while making hot-rolled coil with high intensity
Property, while do not add the Mo elements of costliness in hot-rolled coil and reduce the additive amount of Cr elements, reduce production cost.
Brief description of the drawings
Fig. 1 is that the hot-rolled coil that the embodiment of the present invention 1 provides impacts ductile-brittle transiton curve；
Fig. 2 is the hot-rolled coil impact shear area change curve that the embodiment of the present invention 1 provides；
Fig. 3 is the hot-rolled coil DWTT ductile-brittle transiton curves that the embodiment of the present invention 1 provides；
Fig. 4 is the hot-rolled coil metallographic structure figure that the embodiment of the present invention 1 provides；
Fig. 5 is that the hot-rolled coil that the embodiment of the present invention 2 provides impacts ductile-brittle transiton curve；
Fig. 6 is the hot-rolled coil impact shear area change curve that the embodiment of the present invention 2 provides；
Fig. 7 is the hot-rolled coil DWTT ductile-brittle transiton curves that the embodiment of the present invention 2 provides；
Fig. 8 is the hot-rolled coil metallographic structure figure that the embodiment of the present invention 2 provides；
Fig. 9 is that the hot-rolled coil that the embodiment of the present invention 3 provides impacts ductile-brittle transiton curve；
Figure 10 is the hot-rolled coil impact shear area change curve that the embodiment of the present invention 3 provides；
Figure 11 is the hot-rolled coil DWTT ductile-brittle transiton curves that the embodiment of the present invention 3 provides；
Figure 12 is the hot-rolled coil metallographic structure figure that the embodiment of the present invention 3 provides.
Embodiment
The embodiment of the present invention solves hot-rolled coil in the prior art by providing a kind of hot-rolled coil and its manufacture method
The technical problem of toughness deficiency at low ambient temperatures, realizes the low-temperature flexibility for improving hot-rolled coil, and improves hot-rolled coil
The technique effect of intensity, formability and weldability so that using the natural-gas transfer pipeline of hot-rolled coil manufacture in worst cold case
Under safe and stable operation.
An embodiment of the present invention provides a kind of hot-rolled coil, hot-rolled coil is X70 ranks, and hot-rolled coil is used to manufacture natural
Letter shoot road.The chemical composition of hot-rolled coil contains by weight percentage：C：0.05~0.10%, Si：0.10~
0.30%, Mn：1.30~1.90%, P：≤ 0.015%, S≤0.004%, V：0.01~0.05%, Nb：0.04~
0.065%, Cr：0.10~0.30%, Ti：0.010~0.050%, remaining is Fe and inevitable impurity.Hot-rolled coil
Internal structure is made of acicular ferrite, granular bainite and M/A.
The embodiment of the present invention additionally provides a kind of manufacture method of hot-rolled coil, which is X70 ranks, for making
Make natural-gas transfer pipeline.Method includes：Heating of plate blank, roughing, finish rolling, cooling and coiling process, wherein：
During heating of plate blank, the heating time of control high temperature soak section is less than 50 minutes；Control the total of heating of plate blank
Time is 180~300 minutes, and it is 1180~1210 DEG C to control the tapping temperature after heating of plate blank.
In rough rolling process, the reduction ratio of control each passage of roughing gradually increases, and control roughing end percentage pass reduction is more than
22%, the outlet temperature for controlling roughing is 900~1000 DEG C.The total passage for controlling the roughing is 6~8 passages.
In finishing stands, the inlet temperature of finish rolling is controlled to be less than or equal to 960 DEG C, it is 780~860 to control finishing temperature
DEG C, control the total deformation of slab to be more than 70%.
Control cooling procedure uses ultrafast cold, section cooling and cold sperm pattern.Ultrafast cold cooldown rate is more than 40 DEG C/s,
Control it is described it is ultrafast it is cold after the slab temperature be 480~560 DEG C.
In coiling process, it is 360~420 DEG C to control coiling temperature.
The impact ductile-brittle transition temperature FATT50 of hot-rolled coil provided in an embodiment of the present invention is less than -60 DEG C, hot-rolled coil
DWTT ductile-brittle transition temperatures FATT85 be less than -60 DEG C.
In the embodiment of the present invention, control hot-rolled coil C content be 0.05~0.10%, 0.05~0.10% C content
So that hot-rolled coil possesses higher low-temperature flexibility, while make hot-rolled coil that there is good solderability.In addition, 0.05~
0.10% C content can also improve the intensity of hot-rolled coil, particularly when hot-rolled coil uses low-alloy composition design, adopt
Become apparent with effect of 0.05~0.10% C content on hot-rolled coil intensity is ensured.
In the embodiment of the present invention, the S contents of hot-rolled coil are controlled to be less than 0.004%.S is inevitable impurity member in steel
Element, easily forms non-metallic inclusion in steel, influences the toughness of steel, therefore S contents are more low better.The embodiment of the present invention passes through low
Super-low sulfur in 0.004% controls, and carries out form control to sulfide using Ca processing, can have hot-rolled coil higher
Toughness.
In the embodiment of the present invention, the Nb contents for controlling hot-rolled coil are 0.04~0.065%, are mainly based upon refined crystalline strengthening
With the consideration of precipitation strength.Nb is main refined crystalline strengthening element, suppresses the generation of recrystallization during high temperature deformation.Pass through
The drageffect of Nb elements and the inhibition of Nb elements precipitation are dissolved, the recovery and recrystallization and crystal grain for suppressing austenite are grown up,
Particularly finish rolling stage Unhydrated cement low temperature large deformation stage can significant refining grain size, improving material
It also ensure that its toughness while intensity.Although the Nb contents of hot-rolled coil provided in an embodiment of the present invention are less, in finish rolling
Carried out at once afterwards it is ultrafast it is cold but, hot-rolled coil quickly enters middle temperature transformation area and is formed substantial amounts of under faster cooling rate
Forming core core, makes middle temperature transformation product substantially be refined, and compensate for the refined crystalline strengthening brought due to the reduction of Nb contents, drops at the same time
The low cost input of Nb elements.
In the embodiment of the present invention, control the Cr contents of hot-rolled coil has significantly admittedly for 0.10~0.30%, Cr elements
The effect of molten reinforcing, can make up due to intensity deficiency caused by low C content.Cr elements can reduce γ → α phase transition temperatures at the same time,
Tiny phase-change product is obtained, improves the plasticity and toughness of material.Cr elements can effectively improve the quenching degree of steel, suppress polygon iron
The generation of ferritic and pearlite, promotes to form the transgranular acicular ferrite for having a large amount of dislocation distributions in gentle low-temperature space in.This
In inventive embodiments, hot-rolled coil in the case of other increase quenching degree elements such as no addition Mo, only add 0.10~
The reason for acicular ferrite, granular bainite and M/A are organized that be organized as that 0.30%Cr elements can be realized as coil of strip is
Ultrafast cool equipment is used during control cooling, ultrafast cold quick cooling capacity compensate for Cr elements and reduce and without Mo
The loss for the quenching degree brought.
In the embodiment of the present invention, it is 0.01~0.05% to control V content, and V element is mainly used for increasing second phase particles
Separate out, by the precipitation strength of V, improve the intensity of hot-rolled sheet coil.Although the precipitation of V element has a negative impact toughness,
It can enable the precipitation of the precipitate small and dispersed of V element by the use of ultrafast cool equipment, reduce the unfavorable shadow to toughness
Ring.
Hot-rolled coil provided by the invention and its manufacture method are illustrated with reference to specific embodiment：
Embodiment 1
The chemical composition of hot-rolled coil provided in this embodiment contains by weight percentage：C：0.069%, Si：
0.20%, Mn：1.58%, P：0.0109%, S：0.0008%, V+Ti：0.047%, Nb：0.06%, Cr：0.21%, remaining
For Fe and inevitable impurity, the Pcm values of hot-rolled coil are 0.17%.
The manufacture method of hot-rolled coil provided in this embodiment includes：It is smelting, continuous casting, heating of plate blank, roughing, finish rolling, cold
But and coiling process.Wherein, in smelting process, molten iron is pre-processed, is less than the S contents in final strand
0.004%.During heating of plate blank, the heating time for controlling high temperature soak section is 42 minutes, prevents slab original austenite
The undue roughening of crystal grain.The total time for controlling heating of plate blank is 248 minutes, and it is 1198 to control the tapping temperature after heating of plate blank
DEG C, prevent the undue roughening of slab original austenite, tissue at room temperature is fully refined, while make alloying element abundant
Solid solution, ensures the mechanical property of slab.In rough rolling process, the reduction ratio of control each passage of roughing gradually increases, extreme trace time pressure
Lower rate is 26%, and the outlet temperature for controlling roughing is 961 DEG C, and the total passage for controlling roughing is 8 passages.In finishing stands, control
The inlet temperature of finish rolling processed is 953 DEG C, and it is 829 DEG C to control finishing temperature, and the total deformation for controlling slab is 78%.Cooling procedure
Using ultrafast cold, section cooling and cold sperm pattern, it is 47 DEG C/s to control ultrafast cold cooldown rate, control it is ultrafast it is cold after slab
Temperature be 518 DEG C.In coiling process, it is 369 DEG C to control coiling temperature.
The mechanical property of hot-rolled coil provided in this embodiment is as shown in table 1：
Table 1
Referring to Fig. 1, Fig. 2 and Fig. 3, -30 DEG C of CVN values of hot-rolled coil provided in this embodiment are 330J, impact shear
Area is 100%, and -20 DEG C of DWTT values are 100%.Referring to Fig. 4, the metallographic structure for the hot-rolled coil that embodiment 1 provides is pin
Columnar ferrite, granular bainite and M/A tissues, the type are organized in while ensureing coil of strip intensity to ensureing that the low temperature of coil of strip is tough
Property is highly beneficial.
Embodiment 2
The chemical composition of hot-rolled coil provided in this embodiment contains by weight percentage：C：0.065%, Si：
0.20%, Mn：1.62%, P：0.0111%, S：0.0007%, V+Ti：0.050%, Nb：0.052%, Cr：0.18%, remaining
For Fe and inevitable impurity, the Pcm values of hot-rolled coil are 0.16%.
The manufacture method of hot-rolled coil provided in this embodiment includes：It is smelting, continuous casting, heating of plate blank, roughing, finish rolling, cold
But and coiling process.Wherein, in smelting process, molten iron is pre-processed, the S contents of final strand is less than 0.004%.
During heating of plate blank, the heating time for controlling high temperature soak section is 48 minutes, prevents the mistake of slab original austenite grains
Divide roughening.The total time for controlling heating of plate blank is 265 minutes, and it is 1189 DEG C to control the tapping temperature after heating of plate blank, prevents plate
The undue roughening of base original austenite, enables tissue at room temperature fully to refine, while alloying element is fully dissolved, and ensures
The mechanical property of slab.In rough rolling process, the reduction ratio of control each passage of roughing gradually increases, and last percentage pass reduction is
27%, the outlet temperature for controlling roughing is 962 DEG C, and the total passage for controlling roughing is 8 passages.In finishing stands, finish rolling is controlled
Inlet temperature be 958 DEG C, control finishing temperature be 839 DEG C, control slab total deformation be 73%.Cooling procedure is using super
Rapid cooling, section cooling and cold sperm pattern, it is 49 DEG C/s to control ultrafast cold cooldown rate, control it is ultrafast it is cold after slab temperature
For 532 DEG C.In coiling process, it is 393 DEG C to control coiling temperature.
The mechanical property of hot-rolled coil provided in this embodiment is as shown in table 2：
Table 2
Referring to Fig. 5, Fig. 6 and Fig. 7, -30 DEG C of CVN values of hot-rolled coil provided in this embodiment are 343J, impact shear
Area is 100%, and -20 DEG C of DWTT values are 100%.Referring to Fig. 8, the metallographic structure of hot-rolled coil provided in this embodiment is pin
Columnar ferrite, granular bainite and M/A tissues, structure refinement degree is very high, improves the intensity and toughness of hot-rolled coil.
Embodiment 3
The chemical composition of hot-rolled coil provided in this embodiment contains by weight percentage：C：0.075%, Si：
0.25%, Mn：1.56%, P：0.0113%, S：0.0005%, V+Ti：0.041%, Nb：0.045%, Cr：0.24%, remaining
For Fe and inevitable impurity, the Pcm values of hot-rolled coil are 0.175%.
The manufacture method of hot-rolled coil provided in this embodiment includes：It is smelting, continuous casting, heating of plate blank, roughing, finish rolling, cold
But and coiling process.Wherein, in smelting process, molten iron is pre-processed, and is less than the S contents of final strand
0.004%.During heating of plate blank, the heating time for controlling high temperature soak section is 42 minutes, prevents slab original austenite
Excessive grain is roughened.The total time for controlling heating of plate blank is 275 minutes, and it is 1202 DEG C to control the tapping temperature after heating of plate blank,
Prevent the undue roughening of slab original austenite, tissue at room temperature is fully refined, while make alloying element fully solid
It is molten, ensure the mechanical property of slab.In rough rolling process, the reduction ratio of control each passage of roughing gradually increases, extreme trace time pressure
Rate is 26%, and the outlet temperature for controlling roughing is 963 DEG C, and the total passage for controlling roughing is 8 passages.In finishing stands, control
The inlet temperature of finish rolling is 950 DEG C, and it is 843 DEG C to control finishing temperature, and the total deformation for controlling slab is 79%.Cooling procedure is adopted
With ultrafast cold, section cooling and cold sperm pattern, it is 51 DEG C/s to control ultrafast cold cooldown rate, control it is ultrafast it is cold after slab
Temperature is 546 DEG C.In coiling process, it is 408 DEG C to control coiling temperature.
The mechanical property of hot-rolled coil provided in this embodiment is as shown in table 3：
Table 3
Referring to Fig. 9, Figure 10 and Figure 11, -10 DEG C of CVN values of hot-rolled coil provided in this embodiment are 407J, and impact is cut
Section product is 100%, and -15 DEG C of DWTT values are 100%.Referring to the metallographic group of Figure 12, the implementation case hot-rolled coil provided
Be woven to acicular ferrite, granular bainite and M/A tissue, effectively ensured hot-rolled coil intensity and superelevation low temperature it is tough
Property.
Hot-rolled coil provided in an embodiment of the present invention and its manufacture method, at least possess following beneficial effect：
Hot-rolled coil provided in an embodiment of the present invention, C content is 0.05~0.10%, S contents are less than 0.004%, is passed through
The composition design of low-carbon and low-sulphur ensure that the low-temperature flexibility of hot-rolled sheet coil.Hot-rolled coil is answered using elements such as Mn, Cr, Nb, V and Ti
Close and strengthen, the internal structure of hot-rolled coil is made of acicular ferrite, granular bainite and M/A, further increases heat
Roll the intensity and toughness of coiled sheet.Meanwhile the Mo elements of costliness are not added in hot-rolled coil, reduce production cost.
The manufacture method of hot-rolled coil provided in an embodiment of the present invention, during heating of plate blank, controls high temperature soak section
Heating time be less than 50 minutes, prevent the original austenite grains of slab to be too roughened, it is ensured that it is with relatively low tough crisp turn
Temperature.Make each percentage pass reduction of rough rolling step gradually increase, control entry temperature at finishing is less than or equal to 960 DEG C, and makes plate
Base is more than 70% in the reduction ratio of finish rolling section, ensures that slab carries out large deformation in non-recrystallization zone, increases effective particle size
Quantity, improves the low-temperature flexibility of hot-rolled coil.The manufacture method of hot-rolled coil provided in an embodiment of the present invention, cooling procedure are adopted
With ultrafast cold, section cooling and cold sperm pattern, and ultrafast cold cooldown rate is controlled to be more than 40 DEG C/s, ultrafast cold quickly cools down
Ability compensate for the loss that Cr elements reduce (Cr contents are 0.10~0.30%) and the quenching degree brought without Mo elements, can obtain
Acicular ferrite, granular bainite and M/A tissues are obtained, the low temperature with superelevation is tough while making hot-rolled coil with high intensity
Property, while do not add the Mo elements of costliness in hot-rolled coil and reduce the additive amount of Cr elements, reduce production cost.
It should be noted last that above embodiment is merely illustrative of the technical solution of the present invention and unrestricted,
Although the present invention is described in detail with reference to example, it will be understood by those of ordinary skill in the art that, can be to the present invention
Technical solution technical scheme is modified or replaced equivalently, without departing from the spirit and scope of technical solution of the present invention, it should all cover
Among scope of the presently claimed invention.
Claims (1)
1. a kind of hot-rolled coil, the hot-rolled coil is X70 ranks, and the hot-rolled coil is used to manufacture natural-gas transfer pipeline；
It is characterized in that, the chemical composition of the hot-rolled coil contains by weight percentage：C：0.05~0.10%, Si：0.10~
0.30%, Mn：1.58~1.62%, P：≤ 0.015%, S≤0.004%, V：0.01~0.05%, Nb：0.052~
0.06%, Cr：0.10~0.30%, Ti：0.010~0.050%, remaining is Fe and inevitable impurity；The hot rolled coil
The internal structure of plate is made of acicular ferrite, granular bainite and M/A.
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| CN105525200B (en) * | 2016-02-03 | 2017-11-17 | 首钢总公司 | A kind of high intensity slurry delivery pipe line hot-rolled coil and its manufacture method |
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| CN106544586B (en) * | 2016-10-31 | 2018-01-23 | 首钢总公司 | A kind of effective low carbon low silicon hot-rolled coil of Pneumatic conveying and its manufacture method |
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| WO2018215813A1 (en) * | 2017-05-22 | 2018-11-29 | Arcelormittal | Method for producing a steel part and corresponding steel part |
| CN107674954B (en) * | 2017-09-20 | 2019-04-09 | 武汉科技大学 | The method for improving multi-phase Steels comprehensive performance using deformation Substructure after hot rolling |
| CN108315641A (en) * | 2018-01-19 | 2018-07-24 | 河钢股份有限公司承德分公司 | A kind of high-strength rim for automobile wheel hot-rolled coil and its production method |
| CN110106444B (en) * | 2019-05-30 | 2020-08-25 | 首钢集团有限公司 | 700 MPa-grade hot-rolled plate coil for driving axle housing and preparation method thereof |
| CN111270156A (en) * | 2020-03-18 | 2020-06-12 | 本钢板材股份有限公司 | Production process of hot-rolled X70 pipeline steel with thickness specification of 20.0-25.4 mm |
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