CN109594014A - A kind of low cost Q460C steel plate and preparation method thereof - Google Patents
A kind of low cost Q460C steel plate and preparation method thereof Download PDFInfo
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- CN109594014A CN109594014A CN201811377378.8A CN201811377378A CN109594014A CN 109594014 A CN109594014 A CN 109594014A CN 201811377378 A CN201811377378 A CN 201811377378A CN 109594014 A CN109594014 A CN 109594014A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
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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
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of low cost Q460C steel plates, which includes following chemical component: C:0.15~0.17% by weight percentage；Si:0.3~0.4%；Mn:0.95~1.1%；Cr:0.4~0.5；P≤0.02%；S≤0.005%；Ca:0.0015~0.003%；Als:0.017~0.03%；Remaining is iron and inevitable impurity.A kind of preparation method is also disclosed.The present invention has produced the good Q460C steel plate of comprehensive performance by suitably heating, rolling, controlling cold technique.Steel plate good mechanical performance, the yield strength of steel plate is between 480MPa~515MPa, and tensile strength is between 580~630MPa, and elongation percentage is between 19%~26%, and 0 DEG C of ballistic work is between 153J~221J.
Description
Technical field
The present invention relates to structural steel fields more particularly to a kind of low cost Q460C steel plate and preparation method thereof.
Background technique
Q460C low-alloy high-tensile structural steel plate is widely used and is being built with its higher intensity and good toughness
Build, fields, the especially generous Q460C steel plate usage amount such as machine-building it is big.Q460C steel plate is since intensity is higher, and steel plate
It is often required to carry out cutting welding, in order to make material be easy to weld, carbon equivalent cannot be too high.Therefore it is all generally used in production
Controlled Rolling And Controlled Cooling combines, while a certain amount of microalloy is added in steel, improves toughness to refine crystal grain；Or addition compared with
More alloys, is heat-treated after rolling, and matches good steel plate to obtain intensity and toughness.Since the price of microalloy compares
Expensive, even if additive amount is less, cost of alloy is also higher, while slab quality is easy to produce crackle after microalloy addition, to steel plate
Final quality control on the surface is unfavorable.According to rear process of thermal treatment is rolled, although the comprehensive performance of steel plate is preferable, it is added
Alloy is more, while more one of heat treatment procedure, manufacturing cost are higher again.Since the profit margin of present steel product is lower, effect
Benefit is bad.Therefore cost of goods manufactured is reduced, enhancing product profitability is extremely urgent.
Patent " 460MPa grades of normalizing high strength steel plates of yield strength and its manufacturer of publication number " CN102719737A "
Method " provides a kind of production method of yield strength 460MPa grades of steel plates.This method production intensity meet the requirements, toughness also compared with
It is good.But this method needs to be added the alloys such as V, Ni, and normalizing is also carried out after rolling, and manufacturing cost is higher.
A kind of patent " production method of low-alloy Q460C steel plate " of publication number " CN104651716A " provides one kind
The 30mm thickness of the production method of Q460C steel plate, this method production is all met the requirements with the intensity and toughness of lower steel plate.But this method
It needs to be added the microalloys such as Nb, Ti, will increase cost of alloy in this way, while steel slab surface is easy to produce crackle, to surface of steel plate
Quality control is unfavorable.
The patent " a kind of low-alloy high-strength steel Q460C and its production method " of publication number " CN106086647A " provides one
The production method of kind Q460C steel plate, the armor plate strength and toughness of this method production are all met the requirements.But this method need be added compared with
The microalloys such as more Nb, Ti will increase cost of alloy in this way, while steel slab surface is easy to produce crackle, to plate surface quality
It is unfavorable to control.
Summary of the invention
In order to solve the above-mentioned technical problem, the object of the present invention is to provide a kind of surface quality is good, cost of alloy is low, by force
Degree and toughness match good Q460C steel plate, and its simple production process.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of low cost Q460C steel plate includes following chemical component by weight percentage:
C:0.15~0.17%；Si:0.3~0.4%；Mn:0.95~1.1%；Cr:0.4~0.5；P≤0.02%；S≤
0.005%；Ca:0.0015~0.003%；Als:0.017~0.03%；Remaining is iron and inevitable impurity.
Further, by weight percentage include following chemical component:
C:0.15%, Si:0.4%, Mn:0.95%, Cr:0.4, P:0.02%, S:0.002%, Als:0.017%, Ca:
0.0015%, surplus is Fe and inevitable impurity.
Further, by weight percentage include following chemical component:
C:0.16%, Si:0.34%, Mn:1.05%, Cr:0.45, P:0.012%, S:0.002%, Als:0.027%,
Surplus is Fe and inevitable impurity.
Further, by weight percentage include following chemical component:
C:0.16%, Si:0.35%, Mn:1.02%, Cr:0.45, P:0.013%, S:0.002%, Als:0.025%,
Ca:0.0015%, surplus are Fe and inevitable impurity.
A kind of preparation method of low cost Q460C steel plate, includes the following steps:
1) continuous casting billet of 250mm thickness is selected；
2) heating process: being produced using the continuous casting billet of 250mm thickness, walking beam furnace is used when heating of plate blank, even
1160-1190 DEG C of slab tapping temperature, heating time 240~370 minutes；Walking beam holds up plate when slab heats in heating furnace
The movement speed of base is 1.2m/min；
3) 15mm~20mm thick steel plate roll forming technique: carrying out controlled rolling after heating of plate blank is good, the first stage opens
It rolls with a thickness of slab thickness, 1150~1180 DEG C of first stage start rolling temperature, first stage finishing temperature >=1020 DEG C, the first rank
Single pass reduction ratio >=13% when Duan Gaowen extends rolling, first stage mill speed are 1.5~2.5m/s；Second stage steel plate
Open rolling with a thickness of 4 times of finished steel plate thickness, second stage steel plate start rolling temperature is 870~900 DEG C, second stage finishing temperature
It is 770~800 DEG C；Steel plate carries out section cooling after rolling, final cooling temperature is 590~610 DEG C；
4) 20mm~30mm thick steel plate roll forming technique: carrying out controlled rolling after heating of plate blank is good, the first stage opens
It rolls with a thickness of slab thickness, 1150~1180 DEG C of first stage start rolling temperature, 1010 DEG C of first stage finishing temperature >, the first rank
Single pass reduction ratio >=12% when Duan Gaowen extends rolling, first stage mill speed are 1.2~2m/s；Second stage steel plate
Open rolling is 860~880 DEG C with a thickness of 4 times of finished steel plate thickness, second stage steel plate start rolling temperature, and second stage finishing temperature is
770~790 DEG C；Steel plate carries out section cooling after rolling, final cooling temperature is 590~610 DEG C；
5) final steel plate thickness is 15mm~30mm thick.
Further, in the step 3), steel plate carries out cooling velocity when section cooling after rolling be 20~25 DEG C/s.
Further, in the step 4), steel plate carries out cooling velocity when section cooling after rolling be 15~24 DEG C/s.
Controlled rolling is carried out in austenite recrystallization area to the above-mentioned continuous casting billet heated.Since the design of this ingredient is free of
The microalloys such as Nb, V, therefore recrystallization rolling is all belonged to when rolling.First stage controlled rolling belongs to the austenite of high-temperature region
Controlled rolling is recrystallized, this stage is using low speed, the rolling strategy depressed greatly.Biggish single pass reduction ratio can be such that rolling becomes
Shape is fully penetrated to steel plate center, abundant fining austenite grains and homogeneous austenite structure, while rolling the high temperature weldering of generation
The defects of cooperation is with the loose, micro-crack inside slab is largely eliminated, improves the consistency of steel plate, and material integrates
Performance improvement；Low speed rolling makes the every a time of steel plate roll biggish temperature drop, due to the size master of crystal grain after steel plate recrystallization
Temperature at that time is depended on, rolling a time every in this way will refine in various degree crystal grain, be finally reached sufficiently thin
Change the purpose of austenite grain；There are also mill speed when rolling is low, resistance of deformation is small, biggish single pass pressure easy to accomplish
Rate.The finishing temperature of steel plate is based primarily upon two o'clock consideration, first is that can fully ensure that the start rolling temperature of second stage is met the requirements, two
It is the requirement for considering live batch rolling, to improve rolling efficiency.
After first stage rolls, intermediate base swings cooling on roller-way, opens when being cooled to second stage start rolling temperature
To begin rolling, the rolling of second stage belongs to cryogenic re-crystallisation controlled rolling, when this stage rolling, austenite grain is crushed repeatedly,
Recrystallization softening is further refined again on the basis of such austenite grain is finally rolling refined in the first stage, and by
After second stage rolls, finishing temperature is lower, and austenite grain is no longer grown up substantially, finally obtains tiny austenite crystal
Grain.Austenite grain is more tiny, and grain boundary area is bigger, and nucleation site when from austenite to ferritic transformation is more, shape
Core rate is higher, and finally obtained ferrite crystal grain is more tiny, and the intensity of steel plate is higher, and impact flexibility is better.And it is adopted after rolling
With section cooling, steel plate is quickly cooled to 590~610 by finishing temperature, further reduced austenite to ferritic turn
Temperature has further refined ferrite crystal grain, to improve the intensity and toughness of steel plate.
Compared with prior art, advantageous effects of the invention:
1) present invention is using inexpensive ingredient design, only with alloys such as cheap Si, Mn, Cr, by suitably heating,
Controlled rolling, the cold technique of control have just obtained the good Q460C steel plate of comprehensive performance.
2) intensity, plasticity, the toughness of steel plate are good, organize as tiny ferrite+pearlite.The yield strength of steel plate exists
Between 480MPa~515MPa, tensile strength is between 580~630MPa, and elongation percentage is between 19%~26%, 0 DEG C of ballistic work
Between 153J~221J.
Detailed description of the invention
Fig. 1 is the metallographic structure figure of the steel plate of the embodiment of the present invention 1；
Fig. 2 is the metallographic structure figure of the steel plate of the embodiment of the present invention 2；
Fig. 3 is the metallographic structure figure of the steel plate of the embodiment of the present invention 3；
Fig. 4 is the metallographic structure figure of the steel plate of the embodiment of the present invention 4；
Fig. 5 is the metallographic structure figure of the steel plate of the embodiment of the present invention 5；
Fig. 6 is the metallographic structure figure of the steel plate of the embodiment of the present invention 6.
Specific embodiment
The invention will be further described with reference to embodiments.
Embodiment 1
Using with a thickness of 250mm slab, when heating of plate blank, uses walking beam furnace, work when slab heat in heating furnace
The movement speed that dynamic corbel plays slab is 1.2m/min, and slab tapping temperature is 1160 DEG C, and slab heating time is 240 minutes,
(weight percent) chemical component of slab are as follows: C 0.15%, Si 0.4%, Mn 0.95%, Cr0.4, P 0.02%, S
0.002%, Als 0.017%, Ca 0.0015%, surplus are Fe and inevitable impurity.It is rolled into the steel with a thickness of 15mm
Plate, it is detailed rolling and it is cold go technique to be shown in Table 1, mechanical property is shown in Table 2.As shown in Figure 1, steel plate group is woven to tiny ferrite
+ pearlite.
The rolling of table 1 and cooling technique
2 mechanical property of steel plate of table
Embodiment 2
Using with a thickness of 250mm slab, when heating of plate blank, uses walking beam furnace, work when slab heat in heating furnace
The movement speed that dynamic corbel plays slab is 1.2m/min, and slab tapping temperature is 1190 DEG C, and slab heating time is 370 minutes,
(weight percent) chemical component of slab are as follows: C 0.17%, Si 0.3%, Mn 1.1%, Cr0.4, P 0.015%, S
0.005%, Als 0.03%, Ca 0.003%, surplus are Fe and inevitable impurity.It is rolled into the steel with a thickness of 20mm
Plate, it is detailed rolling and it is cold go technique to be shown in Table 3, mechanical property is shown in Table 4.As shown in Fig. 2, steel plate group is woven to tiny ferrite
+ pearlite.
The rolling of table 3 and cooling technique
4 mechanical property of steel plate of table
Embodiment 3
Using with a thickness of 250mm slab, when heating of plate blank, uses walking beam furnace, work when slab heat in heating furnace
The movement speed that dynamic corbel plays slab is 1.2m/min, and slab tapping temperature is 1175 DEG C, and slab heating time is 312 minutes,
(weight percent) chemical component of slab are as follows: C 0.16%, Si 0.34%, Mn 1.05%, Cr0.45, P 0.012%, S
0.002%, Als 0.027%, Ca 0.0022%, surplus are Fe and inevitable impurity.It is rolled into the steel with a thickness of 18mm
Plate, it is detailed rolling and it is cold go technique to be shown in Table 5, mechanical property is shown in Table 6.As shown in figure 3, steel plate group is woven to tiny ferrite
+ pearlite.
The rolling of table 5 and cooling technique
6 mechanical property of steel plate of table
Embodiment 4
Using with a thickness of 250mm slab, when heating of plate blank, uses walking beam furnace, work when slab heat in heating furnace
The movement speed that dynamic corbel plays slab is 1.2m/min, and slab tapping temperature is 1190 DEG C, and slab heating time is 370 minutes,
(weight percent) chemical component of slab are as follows: C 0.15%, Si 0.3%, Mn 1.1%, Cr0.5, P 0.02%, S
0.005%, Als 0.03%, Ca 0.003%, surplus are Fe and inevitable impurity.It is rolled into the steel with a thickness of 30mm
Plate, it is detailed rolling and it is cold go technique to be shown in Table 7, mechanical property is shown in Table 8.As shown in figure 4, steel plate group is woven to tiny ferrite
+ pearlite.
The rolling of table 7 and cooling technique
8 mechanical property of steel plate of table
Embodiment 5
Using with a thickness of 250mm slab, when heating of plate blank, uses walking beam furnace, work when slab heat in heating furnace
The movement speed that dynamic corbel plays slab is 1.2m/min, and slab tapping temperature is 1160 DEG C, and slab heating time is 240 minutes,
(weight percent) chemical component of slab are as follows: C 0.17%, Si 0.4%, Mn 0.95%, Cr0.5, P 0.012%, S
0.003%, Als 0.017%, Ca 0.0023%, surplus are Fe and inevitable impurity.It is rolled into the steel with a thickness of 25mm
Plate, it is detailed rolling and it is cold go technique to be shown in Table 9, mechanical property is shown in Table 10.As shown in figure 5, steel plate group is woven to tiny iron element
Body+pearlite.
The rolling of table 9 and cooling technique
10 mechanical property of steel plate of table
Embodiment 6
Using with a thickness of 250mm slab, when heating of plate blank, uses walking beam furnace, work when slab heat in heating furnace
The movement speed that dynamic corbel plays slab is 1.2m/min, and slab tapping temperature is 1182 DEG C, and slab heating time is 256 minutes,
(weight percent) chemical component of slab are as follows: C 0.16%, Si 0.35%, Mn 1.02%, Cr0.45, P 0.013%, S
0.002%, Als 0.025%, Ca 0.0015%, surplus are Fe and inevitable impurity.It is rolled into the steel with a thickness of 28mm
Plate, it is detailed rolling and it is cold go technique to be shown in Table 11, mechanical property is shown in Table 12.As shown in fig. 6, steel plate group is woven to tiny iron element
Body+pearlite.
The rolling of table 11 and cooling technique
12 mechanical property of steel plate of table
Embodiment described above is only that preferred embodiment of the invention is described, and is not carried out to the scope of the present invention
It limits, without departing from the spirit of the design of the present invention, those of ordinary skill in the art make technical solution of the present invention
Various changes and improvements, should all fall into claims of the present invention determine protection scope in.
Claims (7)
1. a kind of low cost Q460C steel plate, which is characterized in that by weight percentage include following chemical component:
C:0.15~0.17%；Si:0.3~0.4%；Mn:0.95~1.1%；Cr:0.4~0.5；P≤0.02%；S≤
0.005%；Ca:0.0015~0.003%；Als:0.017~0.03%；Remaining is iron and inevitable impurity.
2. low cost Q460C steel plate according to claim 1, which is characterized in that by weight percentage include following chemistry
Ingredient:
C:0.15%, Si:0.4%, Mn:0.95%, Cr:0.4, P:0.02%, S:0.002%, Als:0.017%, Ca:
0.0015%, surplus is Fe and inevitable impurity.
3. low cost Q460C steel plate according to claim 1, which is characterized in that by weight percentage include following chemistry
Ingredient:
C:0.16%, Si:0.34%, Mn:1.05%, Cr:0.45, P:0.012%, S:0.002%, Als:0.027%, surplus
For Fe and inevitable impurity.
4. low cost Q460C steel plate according to claim 1, which is characterized in that by weight percentage include following chemistry
Ingredient:
C:0.16%, Si:0.35%, Mn:1.02%, Cr:0.45, P:0.013%, S:0.002%, Als:0.025%, Ca:
0.0015%, surplus is Fe and inevitable impurity.
5. the preparation method of low cost Q460C steel plate according to any one of claims 1-4, which is characterized in that including
Following steps:
1) continuous casting billet of 250mm thickness is selected；
2) heating process: being produced using the continuous casting billet of 250mm thickness, and walking beam furnace, continuous casting billet are used when heating of plate blank
1160-1190 DEG C of tapping temperature, heating time 240~370 minutes；Walking beam holds up slab when slab heats in heating furnace
Movement speed is 1.2m/min；
3) 15mm~20mm thick steel plate roll forming technique: carrying out controlled rolling after heating of plate blank is good, first stage open rolling is thick
Spending is slab thickness, 1150~1180 DEG C of first stage start rolling temperature, first stage finishing temperature >=1020 DEG C, and first stage height
Single pass reduction ratio >=13% when temperature extends rolling, first stage mill speed are 1.5~2.5m/s；Second stage steel plate is opened
It rolls with a thickness of 4 times of finished steel plate thickness, second stage steel plate start rolling temperature is 870~900 DEG C, and second stage finishing temperature is
770~800 DEG C；Steel plate carries out section cooling after rolling, final cooling temperature is 590~610 DEG C；
4) 20mm~30mm thick steel plate roll forming technique: carrying out controlled rolling after heating of plate blank is good, first stage open rolling is thick
Degree is slab thickness, and 1150~1180 DEG C of first stage start rolling temperature, 1010 DEG C of first stage finishing temperature >, the first stage is high
Single pass reduction ratio >=12% when temperature extends rolling, first stage mill speed are 1.2~2m/s；The open rolling of second stage steel plate
With a thickness of 4 times of finished steel plate thickness, second stage steel plate start rolling temperature is 860~880 DEG C, and second stage finishing temperature is 770
~790 DEG C；Steel plate carries out section cooling after rolling, final cooling temperature is 590~610 DEG C；
5) final steel plate thickness is 15mm~30mm thick.
6. the preparation method of low cost Q460C steel plate according to claim 5, which is characterized in that in the step 3), steel
Plate carries out cooling velocity when section cooling after rolling be 20~25 DEG C/s.
7. the preparation method of low cost Q460C steel plate according to claim 5, which is characterized in that in the step 4), steel
Plate carries out cooling velocity when section cooling after rolling be 15~24 DEG C/s.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111979499A (en) * | 2020-08-11 | 2020-11-24 | 包头钢铁（集团）有限责任公司 | Production method of low-cost Q460C thick steel plate |
| CN112048667A (en) * | 2020-08-25 | 2020-12-08 | 包头钢铁（集团）有限责任公司 | Low-cost Q420D thick steel plate and production method thereof |
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| CN1995431A (en) * | 2006-01-06 | 2007-07-11 | 鞍钢股份有限公司 | Method for producing ultra-fine grain steel plate by medium-thin slab continuous casting and rolling and steel plate |
| CN104018063A (en) * | 2014-06-18 | 2014-09-03 | 内蒙古包钢钢联股份有限公司 | Low alloy and high strength Q420C medium steel plate and production method thereof |
| CN104018071A (en) * | 2014-06-18 | 2014-09-03 | 内蒙古包钢钢联股份有限公司 | Q420E steel plate with low carbon equivalent and high toughness and production method of Q420E steel plate |
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- 2018-11-19 CN CN201811377378.8A patent/CN109594014A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1995431A (en) * | 2006-01-06 | 2007-07-11 | 鞍钢股份有限公司 | Method for producing ultra-fine grain steel plate by medium-thin slab continuous casting and rolling and steel plate |
| CN104018063A (en) * | 2014-06-18 | 2014-09-03 | 内蒙古包钢钢联股份有限公司 | Low alloy and high strength Q420C medium steel plate and production method thereof |
| CN104018071A (en) * | 2014-06-18 | 2014-09-03 | 内蒙古包钢钢联股份有限公司 | Q420E steel plate with low carbon equivalent and high toughness and production method of Q420E steel plate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111979499A (en) * | 2020-08-11 | 2020-11-24 | 包头钢铁（集团）有限责任公司 | Production method of low-cost Q460C thick steel plate |
| CN112048667A (en) * | 2020-08-25 | 2020-12-08 | 包头钢铁（集团）有限责任公司 | Low-cost Q420D thick steel plate and production method thereof |
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