CN108018502A - A kind of beam steel and its production method of tensile strength >=800MPa - Google Patents
A kind of beam steel and its production method of tensile strength >=800MPa Download PDFInfo
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- CN108018502A CN108018502A CN201710962100.6A CN201710962100A CN108018502A CN 108018502 A CN108018502 A CN 108018502A CN 201710962100 A CN201710962100 A CN 201710962100A CN 108018502 A CN108018502 A CN 108018502A
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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
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
- C21D8/0205—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
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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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—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
- 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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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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
- 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
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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)
Abstract
The present invention a kind of the beam steel 800L and its production method of tensile strength >=800MPa, by optimize temperature-controlled rolling and（DQ+ACC）Controlled cooling process, it is equipped with rational temperature and finally obtains preferable tempered structure, production process is relatively brief, using beam steel plate thickness specification 10mm ~ 14mm produced by the invention, width specifications are in 1500mm ~ 3180mm, while the requirement of GB/T 3,273 2015 is met, steel plate carbon equivalent controls below 0.51 mechanical property of steel plate；Wide plate face can effectively reduce user and weld passage, and low-carbon-equivalent then reduces welding difficulty, additionally with good case hardness, be used suitable for domestic third generation commercialization dumper.
Description
Technical field
The present invention relates to the beam steel 800L and its production method of a kind of tensile strength >=800MPa, belong to metallurgy and roll
Technical field processed.
Technical background
For auto industry, it is one of its target pursued to reduce fuel consumption per hundred kilometers, is not reducing safety coefficient
Under the premise of, it is to reduce the most effective method of the criterion of the fuel consumption to mitigate vehicle body dead weight, and use intensity is higher, the steel plate system of thinner thickness
It is the most effective approach for mitigating vehicle body dead weight to make automotive frame.The consumption of steel is not only reduced using new beam steel, is also dropped
The manufacture cost of Di Liao auto manufacturings.510L-610L is widely used to common commercial car at present, and the third generation is commercial certainly
Unload, its special U-shaped no beam cabin design form, is directly used in compartment steel plate by high-strength crossbeam steel, effectively increases car
Railway carriage or compartment, which resists, pounds wearability, and reduces vehicle body dead weight, reduces automobile fuel consumption.At present commercialization dumper to tensile strength 700MPa with
Upper rank beam steel demand is increasing.
The patent of Publication No. CN104805359 A discloses a kind of tensile strength 610MPa grades of beam steels and its system
Preparation Method, it is good to specifically disclose the performances such as 610MPa grades of beam steel strips of 2mm ~ 12.7mm thickness, its intensity, toughness plasticity
It is good, but the control of its tensile strength is relatively low in 630MPa ~ 690MPa, intensity rank, and final finished is strip, current country's strip
Maximum width is limited to coiling machine capacity of equipment in 2250mm, and Plate Production thickness and width is limited.Publication No. CN
The patent of 105543666 A discloses a kind of yield strength 960MPa beam steels and its production method, and strip thickness 3mm ~
10mm, tensile strength is more than 1000MPa, but its thickness and width specification is not suitable for specification used in current mine dumper, and
Component carbon equivalent is up to 0.64, the excessive increase welding difficulty of carbon equivalent, and carries out quenching treatment, process flow after needing uncoiling
It is longer.
The content of the invention
The present invention provides a kind of the beam steel 800L and its production method of tensile strength >=800MPa, excellent by component
Change, through controlled rolling, accelerate cooling steel plate is obtained fine texture, then be equipped with rational temperature, utilize the analysis of microalloy
Go out, high-strength tenacity, the beam steel of high rigidity of 10~14mm of thickness can be produced.
Solve above-mentioned technical problem technical solution be：
A kind of beam steel of tensile strength >=800MPa, the mass percentage of its chemical composition are：C：0.06 ~ 0.09%,
Si：0.3 ~ 0.4%, Mn：1.60~1.75%, Nb：0.055 ~ 0.070%, Ti：0.010 ~ 0.030%, Cr：0.25 ~ 0.35%, Mo：
0.20 ~ 0.30%, B：0.0005 ~ 0.0016%, Als >=0.015, it is other for inevitable residual elements in Fe and production process
And impurity.
The beam steel of above-mentioned tensile strength >=800MPa a kind of, the mass percentage of its chemical composition are preferred
For：C：0.07 ~ 0.09%, Si：0.3 ~ 0.4%, Mn：1.60~1.70%, Nb：0.055 ~ 0.065%, Ti：0.010 ~ 0.025%,
Cr：0.25 ~ 0.32%, Mo：0.20 ~ 0.30%, B：0.0010 ~ 0.0016%, Als >=0.015, other is in Fe and production process
Inevitable residual elements and impurity.
A kind of production method of tensile strength >=800MPa beam steels, including molten iron pre-desulfurization, converter smelting, LF essence
Refining, continuous casting, heating stove heat, controlled rolling,（DQ+ACC）Cooling and tempering process, wherein：
In controlled rolling process, start rolling temperature is 1050~1120 DEG C；One 950 DEG C of stage rolling temperature ＞, two-stage open rolling temperature
≤ 920 DEG C of degree, more than 3.5 times that treat that temperature thickness is steel plate finished product thickness during two-stage open rolling, finish rolling add up reduction ratio >=
71%, finishing temperature control is in the range of 820 DEG C~890 DEG C；
（DQ+ACC）In refrigerating work procedure, steel plate opens cold temperature as 740 DEG C ~ 780 DEG C, and final cooling temperature is 490 DEG C ~ 530 DEG C, (DQ+
ACC) control of section cooling rate is in 17 DEG C/s ~ 28 DEG C/s.
In tempering process, temperature is 610 DEG C ~ 620 DEG C, heating coefficient 3.5min/mm.
A kind of production method of above-mentioned tensile strength >=800MPa beam steels, wherein：
The O content in steel is controlled in converter smelting process in below 600ppm, 0.01wt% of the lower quantity of slag of control tapping in molten steel amount
Below, it is ensured that the cleanliness factor of molten steel；
In more than 40min, refining terminates preceding 10min~15min and adds ferro-niobium and ferrotianium for refining time control in LF refining process
Alloy carries out microalloying, effectively controls steel inclusion rank summation to be no more than 1.5 grades；
In continuous casting working procedure molten steel overtemperature control in the range of 10 DEG C ~ 35 DEG C, pulling rate whole-process control 0.85m/min ~
In the range of 1.10m/min；The offline stacking slow cooling processing of strand；
In heating furnace heating process, the heating time of slab in heating furnace is 4 ~ 5h, the surface temperature control at heating end of a period moment
System is in the range of 1100~1170 DEG C.
The present invention employs controlled rolling to ensure the requirement that mechanical property of steel plate meets GB/T 3273-2015（CR rolls
System）With ultrafast cold+acceleration cooling（DQ+ACC）Technological process, the parameter setting scope of each technological process is mainly with reference to phase
On the basis of closing metallurgy principle, obtained by field test：
A. the surface temperature control after the heated stove heat of slab can be reduced into heating process between 1100 DEG C ~ 1170 DEG C
The generation of middle iron scale, easy to De-scaling box de-scaling；And in this temperature range, original austenite grains size will not be drastically
Grow up, easy to crystal grain thinning.
B, first stage rolling temperature is controlled at 950 DEG C above is in order to ensure the deformation of steel plate in austenite recrystallization temperature
Area carries out, and passes through recrystallization softening crystal grain repeatedly；It is to ensure its change that the start rolling temperature of two-stage is scheduled on less than 920 DEG C
Shape is carried out in non-recrystallization warm area, so as to avoid partial, re-crystallization warm area, reduces mixed crystal phenomenon；The control steel plate two-stage rolls
Thickness when processed is more than 3.5 times of finished product thickness, can obtain accumulation reduction ratio >=71%, is to obtain enough with this
Phase transformation nucleation point（Dislocation）And driving force（Deformation energy）；Finishing temperature control can ensure at 820 DEG C ~ 890 DEG C steel plate compared with
Deformed at low temperature, reducing reply that hot stage occurs etc. reduces the phenomenon of dislocation density；And in this finish to gauge temperature
Degree condition lower steel plate enters（DQ+ACC）Temperature when equipment is controlled cooling can be controlled at 740 DEG C ~ 780 DEG C, at this time steel
The tissue of plate is still mainly austenite, so as to ensure that favourable condition is created in the completion transformation of 800L phase transformations.
C, actual production illustrates that final cooling temperature when steel plate goes out ACC is controlled at 490 DEG C ~ 530 DEG C, at this time, mistake inside steel plate
Cold austenite structure is converted into fine texture.
D, the present invention uses 610 DEG C ~ 620 DEG C temperatures, heating coefficient 3.5min/mm, under the tempering process, steel plate
The carboritride of internal Nb, Ti, which separate out, reaches maximum, has so effectively ensured yield strength, while tensile strength and surface
Reducing by a relatively large margin does not occur in hardness, effectively improves steel plate toughness and plate property uniformity yet.
Beneficial effects of the present invention are：
The present invention is by rational composition design, on the premise of proof strength, using pure molten steel, optimization temperature-controlled rolling and
（DQ+ACC）Controlled cooling process, then be equipped with rational temperature and finally obtain preferable tempered structure, production process is opposite
Briefly, it is strong in 1500mm ~ 3180mm, tension using beam steel plate thickness specification 10mm ~ 14mm produced by the invention, width specifications
824MPa-849MPa is spent, yield strength 697MPa-728MPa, elongation percentage >=14.5%, -20 DEG C of ballistic work ＞ 100J, surface is hard
Spend ＞ 250HB, mechanical property of steel plate while the requirement of GB/T 3273-2015 is met, steel plate carbon equivalent control 0.51 with
Under；Wide plate face can effectively reduce user and weld passage, and low-carbon-equivalent then reduces welding difficulty, additionally with good surface
Hardness, uses suitable for domestic third generation commercialization dumper.
Brief description of the drawings
500 × micro-organization chart for the 800L that Fig. 1 is produced by embodiment 1；
500 × micro-organization chart for the 800L that Fig. 2 is produced by embodiment 2；
500 × micro-organization chart for the 800L that Fig. 3 is produced by embodiment 3；
500 × micro-organization chart for the 800L that Fig. 4 is produced by embodiment 4；
500 × micro-organization chart for the 800L that Fig. 5 is produced by embodiment 5.
Embodiment
A kind of beam steel 800L of tensile strength >=800MPa of the present invention, the mass percentage point of each element in steel
It is not：C：0.06 ~ 0.09%, preferably 0.07 ~ 0.09%；Si：0.3~0.4%；Mn：1.60~1.75%, preferably 1.60~1.70%；
Nb：0.055 ~ 0.070%, preferably 0.055 ~ 0.065%；Ti：0.010 ~ 0.030%, preferably 0.010 ~ 0.025%；Cr：0.25~
0.35%, 0.25 ~ 0.32%, Mo：0.20 ~ 0.30%, B：0.0005~0.0016%, preferably 0.0010 ~ 0.0016%；Als≥
0.015%；Other is inevitable residual elements and impurity in Fe and production process.
It is pre- using molten iron present invention also offers the production method of tensile strength >=800MPa beam steels 800L a kind of
Desulfurization, converter smelting, LF refining, continuous casting, heating stove heat, controlled rolling（CR modes roll）、（DQ+ACC）Ultrafast cold+acceleration
Cooling technique step, wherein：
The O content in steel is controlled in converter smelting process in below 600ppm, 0.01%wt of the lower quantity of slag of control tapping in molten steel amount
Below, it is ensured that the cleanliness factor of molten steel；
Refining time control is in more than 40min in LF refining technique, refining terminate preceding 10min~15min add ferro-niobium and ferrotianium into
Row microalloying, effectively controls steel inclusion rank summation to be no more than 1.5 grades；
In continuous casting process molten steel overtemperature control in the range of 10 DEG C ~ 35 DEG C, pulling rate whole-process control 0.85m/min ~
In the range of 1.10m/min；The offline stacking slow cooling processing of strand；
The heating time of slab in heating furnace is 4 h ~ 5h, heating end the moment surface temperature control 1100 DEG C~
In the range of 1170 DEG C；
Rolled in controlled rolling technique using CR modes, start rolling temperature is 1050 DEG C~1120 DEG C；One stage finishing temperature ＞ 950
℃；Two-stage start rolling temperature≤920 DEG C, more than 3 times that treat that temperature thickness is steel plate finished product thickness during two-stage open rolling, finish rolling is tired out
Reduction ratio >=71% is counted, finishing temperature control is in the range of 820 DEG C~890 DEG C；
Using（DQ+ACC）Type of cooling control cooling, the cold temperature of opening of steel plate is 740 DEG C ~ 780 DEG C, and the final cooling temperature of steel plate is
490 DEG C ~ 530 DEG C, DQ cooling velocities are controlled in 17 DEG C/s -28 DEG C/s.
In tempering process, temperature is 610 DEG C ~ 620 DEG C, heating coefficient 3.5min/mm.
Below by way of specific embodiment 1~5, the present invention will be further described：
Embodiment 1~5 selects 260mm big cross sections continuous casting billet to ensure compression ratio, the 800L that production thickness specification is 10mm ~ 14mm
Finished steel, refining time control is prevented in more than 40min, whole micro-pressure operation in LF refining technique in steelmaking process
Molten steel inhales nitrogen；White slag desulfurization, rapid slagging are made using lime, aluminum steel, aluminum shot etc., sweetening process rationally controls tolerance, forbids to adopt
Stirred with atm number；Composition adjustment is carried out using ferromanganese, ferrosilicon, aluminum steel, ferrotianium, in the LF later stages into carrying out Als after white slag desulfurization
Adjustment, refining terminates preceding 10min ~ 15min and adds ferro-niobium and ferrotianium to carry out microalloying, before being sampled after the completion of composition adjustment during soft blow
Between be not less than 3min；Below outbound S≤0.010%, Ca >=25ppm, effectively controls steel grade inclusion behavior summation to be no more than 1.5
Level；Whole process protection is cast in casting process in continuous casting process, uses two chill space electromagnetic stirrings and dynamic soft-reduction, molten steel overheat
Temperature stabilization is controlled in the range of 10 DEG C ~ 35 DEG C, and pulling rate whole-process control is in the range of 0.85m/min ~ 1.10m/min；Under strand
Line stacking slow cooling, cooling time are more than 24h；
The 800L finished steels that the thickness specification tested according to the above method is 10mm-14mm, chemical composition mass percentage
（wt%）As shown in table 1, rolling and cooling technique are as shown in table 2, and the results are shown in Table 3 for mechanics properties testing：
The chemical composition (wt%, surplus Fe) of 1 each embodiment of table
The controlled rolling of 2 each embodiment of table+（DQ+ACC）+ tempering process parameter
The mechanical property of 3 each embodiment of table
Embodiment 1~5 shows that the 800L level mechanical property of steel plate produced fully meets wanting for national standard GB/T 3273-2015
Ask；The microscopic structure that Fig. 1~Fig. 5 can be seen that each embodiment steel plate is fine and closely woven ferrite and tempered sorbite.
Claims (4)
- A kind of 1. beam steel of tensile strength >=800MPa, it is characterised in that：The quality hundred of the crossbeam steel chemical composition Point content is：C：0.06 ~ 0.09%, Si：0.3 ~ 0.4%, Mn：1.60~1.75%, Nb：0.055 ~ 0.070%, Ti：0.010~ 0.030%, Cr：0.25 ~ 0.35%, Mo：0.20 ~ 0.30%, B：0.0005 ~ 0.0016%, Als >=0.015, other is Fe and production During inevitably residual elements and impurity.
- A kind of 2. beam steel of tensile strength >=800MPa as claimed in claim 1, it is characterised in that：The beam steel The mass percentage of chemical composition is preferably：C：0.07 ~ 0.09%, Si：0.3 ~ 0.4%, Mn：1.60~1.70%, Nb： 0.055 ~ 0.065%, Ti：0.010 ~ 0.025%, Cr：0.25 ~ 0.32%, Mo：0.20 ~ 0.30%, B：0.0010 ~ 0.0016%, Als >=0.015, it is other for inevitable residual elements and impurity in Fe and production process.
- 3. a kind of production method of tensile strength >=800MPa beam steels, including molten iron pre-desulfurization, converter smelting, LF essence Refining, continuous casting, heating stove heat, controlled rolling,（DQ+ACC）Cooling and tempering process, it is characterised in that：In the controlled rolling process, start rolling temperature is 1050~1120 DEG C；One 950 DEG C of stage rolling temperature ＞, the two-stage opens Roll temperature≤920 DEG C, more than 3.5 times that treat that temperature thickness is steel plate finished product thickness during two-stage open rolling, finish rolling adds up reduction ratio >=71%, finishing temperature control is in the range of 820 DEG C~890 DEG C；It is described（DQ+ACC）In refrigerating work procedure, steel plate opens cold temperature as 740 DEG C ~ 780 DEG C, and final cooling temperature is 490 DEG C ~ 530 DEG C, (DQ+ACC) control of section cooling rate is in 17 DEG C/s ~ 28 DEG C/s；In the tempering process, temperature is 610 DEG C ~ 620 DEG C, heating coefficient 3.5min/mm.
- A kind of 4. production method of tensile strength >=800MPa beam steels as claimed in claim 3, it is characterised in that：The O content in steel is controlled in the converter smelting process, and in below 600ppm, control taps the lower quantity of slag in molten steel amount Below 0.01wt%, it is ensured that the cleanliness factor of molten steel；Refining time control is in more than 40min in the LF refining process, refining terminate preceding 10min~15min add ferro-niobium and Ferro-titanium carries out microalloying, effectively controls steel inclusion rank summation to be no more than 1.5 grades；In the continuous casting working procedure molten steel overtemperature control in the range of 10 DEG C ~ 35 DEG C, pulling rate whole-process control 0.85m/min ~ In the range of 1.10m/min；The offline stacking slow cooling processing of strand；In the heating furnace heating process, the heating time of slab in heating furnace is 4 ~ 5h, the surface temperature at heating end of a period moment Degree control is in the range of 1100~1170 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710962100.6A CN108018502A (en) | 2017-10-16 | 2017-10-16 | A kind of beam steel and its production method of tensile strength >=800MPa |
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| CN201710962100.6A CN108018502A (en) | 2017-10-16 | 2017-10-16 | A kind of beam steel and its production method of tensile strength >=800MPa |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518074A (en) * | 2018-10-10 | 2019-03-26 | 安阳钢铁股份有限公司 | A kind of economical high tenacity 800MPa grades of beam steels and its production method |
| CN114107819A (en) * | 2021-11-26 | 2022-03-01 | 宝武集团鄂城钢铁有限公司 | 800 MPa-grade tempering-resistant high-strength steel plate and preparation method thereof |
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| CN102892911A (en) * | 2010-05-18 | 2013-01-23 | 新日本制铁株式会社 | Automotive underbody part having excellent low cycle fatigue properties, and process for production thereof |
| CN103589969A (en) * | 2013-11-12 | 2014-02-19 | 湖南华菱湘潭钢铁有限公司 | Production method of quenched and tempered high-intensity Q890D super-thick steel plate |
| CN106086639A (en) * | 2016-06-20 | 2016-11-09 | 河北钢铁股份有限公司邯郸分公司 | A kind of superelevation strong steel for engineering machinery Q960D and production method thereof |
| CN107058898A (en) * | 2017-03-31 | 2017-08-18 | 河钢股份有限公司邯郸分公司 | A kind of Q690D low-carbon bainite steels and its production method |
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2017
- 2017-10-16 CN CN201710962100.6A patent/CN108018502A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102892911A (en) * | 2010-05-18 | 2013-01-23 | 新日本制铁株式会社 | Automotive underbody part having excellent low cycle fatigue properties, and process for production thereof |
| CN103589969A (en) * | 2013-11-12 | 2014-02-19 | 湖南华菱湘潭钢铁有限公司 | Production method of quenched and tempered high-intensity Q890D super-thick steel plate |
| CN106086639A (en) * | 2016-06-20 | 2016-11-09 | 河北钢铁股份有限公司邯郸分公司 | A kind of superelevation strong steel for engineering machinery Q960D and production method thereof |
| CN107058898A (en) * | 2017-03-31 | 2017-08-18 | 河钢股份有限公司邯郸分公司 | A kind of Q690D low-carbon bainite steels and its production method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518074A (en) * | 2018-10-10 | 2019-03-26 | 安阳钢铁股份有限公司 | A kind of economical high tenacity 800MPa grades of beam steels and its production method |
| CN109518074B (en) * | 2018-10-10 | 2020-11-06 | 安阳钢铁股份有限公司 | Economical high-toughness 800 MPa-grade automobile girder steel and production method thereof |
| CN114107819A (en) * | 2021-11-26 | 2022-03-01 | 宝武集团鄂城钢铁有限公司 | 800 MPa-grade tempering-resistant high-strength steel plate and preparation method thereof |
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Application publication date: 20180511 |