CN109161796A - With favorable low-temperature impact toughness high-strength crossbeam steel 800L and its production method - Google Patents
With favorable low-temperature impact toughness high-strength crossbeam steel 800L and its production method Download PDFInfo
- Publication number
- CN109161796A CN109161796A CN201811015230.XA CN201811015230A CN109161796A CN 109161796 A CN109161796 A CN 109161796A CN 201811015230 A CN201811015230 A CN 201811015230A CN 109161796 A CN109161796 A CN 109161796A
- Authority
- CN
- China
- Prior art keywords
- steel
- control
- temperature
- strength
- impact toughness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
-
- 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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
- C21D2211/004—Dispersions; Precipitations
-
- 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
Abstract
The invention discloses one kind to have favorable low-temperature impact toughness high-strength crossbeam steel 800L and its production method, the high-strength crossbeam steel 800L chemical component composition and its mass percentage are as follows: C:0.065~0.085%, Si:0.05~0.15%, Mn:1.30~1.60%, P≤0.014%, S≤0.003%, Nb:0.045~0.065%, Ti:0.100~0.120%, Als:0.015~0.035%, N≤0.005%, surplus are impurity in Fe and allowed band；The production method includes molten iron pretreatment, smelting, continuous casting, slab heating, controlled rolling, section cooling process.Present component design uses low-carbon high-manganese and a small amount of niobium titanium complex intensifying mechanism, guarantees that tissue and performance reach requirement, rolling mill practice uses TMCP thermo-mechanical rolling, so as to improve the comprehensive mechanical property of steel.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to one kind has favorable low-temperature impact toughness high-strength crossbeam steel 800L
And its production method.
Background technique
800L belongs to high-strength vehicle beam steel, is mainly used for processing commercial crossbeam.It is fast with current Automobile Transportation
Speed development and national overload remediation policy are implemented energetically.The lightweight of commercial vehicle is that automotive field reduces haze and Environment control
One of important measures have caused the extensive concern of the whole society.
Beam steel plate thickness reduces 0.05mm, 0.10mm, 0.15mm respectively, vehicle body can loss of weight 6%, 12%, 18%,
And increasing armor plate strength is the important channel for reducing plate thickness, every 10% fuel consumption for mitigating its total weight of vehicle can reduce by 6%
~8%.Therefore under the premise of guaranteeing automobile integral strength and use reliability, the lightweight of automobile body can reduce vehicle
Oil consumption improves the cruising ability of vehicle.One of the automotive interior big part of carrying, automotive frame almost carry automobile and cargo
All weight also directly affects the driving safety of automobile, therefore the deformation of crossbeam is substantially based on bending.
The manufacturing process that general automotive frame steel plate uses is the mode of punching press, bending and molding, and the steel plate of crossbeam is wanted
Ask also very high, it is necessary to have obdurability, fatigue durability, a cold formability, low-alloy high-strength and ultrahigh-strength steel plates this two
The use of kind material is only later development trend.
With vigorously implementing for commercial vehicle limit for tonnage overload remediation policy, mitigate commercial vehicle own wt, improve payload, reduces
Fuel consumption etc. is the development trend of the following significant period of time.Material used in low tonnage load is generally at present
The such material of Q345,510L, 610L is all thicker for the safety generally crucial load-carrying position steel for guaranteeing vehicle, increases
The weight of automobile itself all employs the slightly higher 700L of intensity on commercial vehicle, special-purpose vehicle and engineering machinery vehicle at present.From
Consider that the beam steel of exploitation higher intensity is imperative in the angle of economical and energy saving.
Summary of the invention
The technical problem to be solved in the present invention is to provide one kind have favorable low-temperature impact toughness high-strength crossbeam steel 800L and
Its production method.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: one kind has favorable low-temperature impact toughness high
Powerful joist steel 800L, the high-strength crossbeam steel 800L chemical component composition and its mass percentage are as follows: C:0.065~
0.085%, Si:0.05~0.15%, Mn:1.30~1.60%, P≤0.014%, S≤0.003%, Nb:0.045~0.065%, Ti:
0.100~0.120%, Als:0.015~0.035%, N≤0.005%, surplus are impurity in Fe and allowed band.
High-strength crossbeam steel 800L thickness specification of the present invention is 2.0~16.0mm, polygon iron element subject to metallographic structure
Body+acicular ferrite+TiC precipitate, 11.5~13.0 grades of grain size.
High-strength crossbeam steel 800L mechanical property of the present invention: 720~790MPa of yield strength, tensile strength 810~
900MPa, elongation percentage 15~19%, yield tensile ratio 0.92~0.96, -20 DEG C of 120~180J of full size bar ballistic work.
The present invention also provides a kind of production method with favorable low-temperature impact toughness high-strength crossbeam steel 800L, the lifes
Production method includes molten iron pretreatment, smelting, continuous casting, slab heating, controlled rolling, section cooling process；The controlled rolling work
Sequence, first stage are roughing, and roughing finishing temperature is 1010~1060 DEG C, and second stage is finish rolling, entry temperature at finishing control
At 1000~1050 DEG C, finish rolling finishing temperature is controlled at 886~914 DEG C, 583~617 DEG C of coiling temperature；The laminar flow cooling
Sequence uses 3/4 refrigerating mode of leading portion in the layer cold stage, and at 25~33 DEG C, cooling velocity is controlled 23~50 for coolant water temperature control
℃/s。
Controlled rolling process of the present invention, rolling are rolled using two-stage control, and the first stage is roughing, using 3+5
Passes, roughing finishing temperature are 1010~1060 DEG C, and it is 36~50mm that roughing, which exports workpiece thickness,；Second stage is essence
It rolling, entry temperature at finishing is controlled at 1000~1050 DEG C, by 7 passes of F1-F7 mm finishing mill unit, de-scaling water between finishing rolling mill
Standard-sized sheet, final reduction rate 20~23%, it is 67~93% that second stage, which adds up reduction ratio, finish rolling finishing temperature control 886~
914 DEG C, 583~617 DEG C of coiling temperature.
Section cooling process of the present invention, the layer cold stage use 3/4 refrigerating mode of leading portion, i.e. one group of water, 4 collectors,
Every group is opened 3, and every volume water consumption is 4200~5600m3.
Molten iron after blast furnace process is poured into ladle by hot metal pre process procedures of the present invention, and bull ladle is carried out into desulfurization station
Desulfurization process, molten iron S:0.030~0.050% before desulfurization, using magnesium powder and lime blowing desulfurization, iron after the desulfurization process of desulfurization station
Water S≤0.008%；The magnesium powder and lime ratio are controlled 2.5~3.0, and the control of blowing time is in 24~30min, magnesium powder blowing
Rate control is controlled in 13.5~15.0kg/min, lime injection rate in 36~41kg/min.
Smelting procedure of the present invention, using converter smelting+LF refining+RH refinery practice；
Converter smelting process is bessemerized using 250T, and self-produced high-quality steel scrap is added in the every furnace 250t of molten iron, and (predominantly mild steel is cut
Side plate) 40t, the control of total charge weight within 300t, in furnace basicity of slag control 3.0~4.5, oxygen blast speed control 11~
12m3/s, total oxygen blow duration control is in 900~1100s；To prevent molten steel from increasing N, the whole process bottom-blowing of converter argon gas 200 that blows~
350NM³/h；Sucking air is prevented, converting process guarantees 10~20Pa of converter mouth micro-positive pressure；Converter terminal blows only temperature 1630
~1660 DEG C, control terminal C:0.02~0.04%, P≤0.015%, O:500~900ppm；Slide plate pushing off the slag is used when tapping, sternly
Lattice control the lower quantity of slag, and tap 5~7min of time, and electrolysis 11.5~12.5kg/t of manganese alloy steel, tapping 1/2 is added in when tapping 1/4
When be added lime, lime adding amount is 0.5~0.8kg/t steel；
LF refining technique is added aluminum shot, lime, fluorite using double refinery practices, after entering the station and quickly makes white slag, the aluminium content that enters the station control
System sample examination ingredient after 300~400ppm, slagging, according to composition adjustment molten steel alloy content；When LF power transmission molten steel heats
Between control in 15~20min, heating rate is 5~6 DEG C/min, and the control of refining out-station temperature is at 1615~1640 DEG C, LF refining
35~55min of time blows Ar 6~10min of gas time without Ca processing after refining only, to avoid molten steel temperature drop excessive,
Controlling net air-blowing quantity avoids molten steel exposed；Refining whole process forbids atm number to stir in addition to alloying and de- S process, micro- in furnace
Positive pressure operation avoids molten steel air-breathing；
RH refinery practice, RH refine recycle stream and use Ar gas, and circulation tolerance is 2000~3000NL/min, and refining process uses
Whole depth vacuum mode；Vacuum tank vacuum degree≤1.0mbar starts to carry out alloy adjustment, be vacuum-treated after being vacuum-treated 3min
20~25min of time, pure 6~10min of degassing time；Vacuum terminates, and ladle opens argon bottom-blowing, flow control after being reduced to ground
System is advisable with top of the slag fine motion in 300~800NL/min, forbids strong mixing；To progress Ca processing when feeding silk position, molten steel Ca content
Control 6~8min of soft blow time after 20~30ppm, Ca are disposed.
Continuous casting working procedure of the present invention, continuous casting process use dynamic soft-reduction, solidification end drafts are increased, according to pulling rate
Determine that terminal position manually adjusts end drafts, drafts increases to 2.0mm by 1.5mm, improves slab center mass；Continuous casting
Using pipe line steel covering slag, coverture uses Ultra-low carbon coverture, and tensile speed control is drawn in 0.9~1.4m/min using perseverance
Speed casting each pours time every stream and takes one block check slab endoplasm situation of sufur printing sample, continuous casting 38~45min of duration, and slab is cut
First 2.0~2.5m, tail base cut off 1.5~2.0m；38~65t of middle packet Metal Weight, middle wrap remain 18~25t of steel amount.
Slab heating process of the present invention, 1230~1270 DEG C of bringing-up section temperature, total 200~300min of heating time.
There is the present invention favorable low-temperature impact toughness high-strength crossbeam steel 800L product standard to refer to GB/T 3273-2015；It produces
Product method for testing performance canonical reference GB/T 228/229/232.
The beneficial effects of adopting the technical scheme are that 1, present component design on use low-carbon high-manganese with
And the mechanism of a small amount of niobium titanium complex intensifying, by the refined crystalline strengthening of Nb, Ti alloy and the precipitation strength of TiC Secondary phase particle,
Guarantee that tissue and performance reach requirement.2, rolling mill practice of the present invention uses TMCP thermo-mechanical rolling, by controlling deformation temperature, shape
The parameters such as variable and rate of deformation, obtain the austenite grain of suitable dimension, so as to improve the comprehensive mechanical property of steel.3, this hair
It is bright not only to have can guarantee steel performance but also both economical ingredient design system and production technology, it is 300-500 yuan/ton of enterprise's wound effect
Steel, while the usage amount of client's steel is reduced, the payload of vehicle is improved, complete vehicle weight and fuel consumption are reduced.
Detailed description of the invention
Fig. 1 is 1 high-strength crossbeam steel 800L coil of strip thickness of embodiment, 1/4 position micro-organization chart；
Fig. 2 is 1 high-strength crossbeam steel 800L coil of strip thickness of embodiment, 1/2 position micro-organization chart；
Fig. 3 is 2 high-strength crossbeam steel 800L coil of strip thickness of embodiment, 1/4 position micro-organization chart；
Fig. 4 is 2 high-strength crossbeam steel 800L coil of strip thickness of embodiment, 1/2 position micro-organization chart；
Fig. 5 is 3 high-strength crossbeam steel 800L coil of strip thickness of embodiment, 1/4 position micro-organization chart；
Fig. 6 is 3 high-strength crossbeam steel 800L coil of strip thickness of embodiment, 1/2 position micro-organization chart；
Fig. 7 is 4 high-strength crossbeam steel 800L coil of strip thickness of embodiment, 1/4 position micro-organization chart；
Fig. 8 is 4 high-strength crossbeam steel 800L coil of strip thickness of embodiment, 1/2 position micro-organization chart；
Fig. 9 is 5 high-strength crossbeam steel 800L coil of strip thickness of embodiment, 1/4 position micro-organization chart；
Figure 10 is 5 high-strength crossbeam steel 800L coil of strip thickness of embodiment, 1/2 position micro-organization chart.
Specific embodiment
The present invention will be further described in detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
The present embodiment has favorable low-temperature impact toughness high-strength crossbeam steel 800L with a thickness of 2.5mm, chemical component composition and matter
Measure percentage composition are as follows: C:0.07%, Si:0.08%, Mn:1.30%, P:0.012%, S:0.003%, Nb:0.050%, Ti:0.100%,
Als:0.30%, N:0.0045%, surplus are impurity in Fe and allowed band.
Production method of the present embodiment with favorable low-temperature impact toughness high-strength crossbeam steel 800L includes molten iron pretreatment, smelting
Refining, continuous casting, slab heating, controlled rolling, section cooling process, specific process step are as described below:
(1) hot metal pre process procedures: pouring into ladle for molten iron after blast furnace process, and bull ladle carries out desulfurization process into desulfurization station, takes off
Molten iron S:0.035% before sulphur, using magnesium powder and lime blowing desulfurization, magnesium powder and lime ratio are controlled 2.6, and the blowing time controls
In 26min, the control of magnesium powder injection rate is controlled in 14kg/min, lime injection rate in 37kg/min, desulfurization station desulfurization process
Molten iron S:0.006% afterwards；
(2) smelting procedure: converter smelting+LF refining+RH refinery practice is used；
Converter smelting process, basicity of slag control is 3.2 in furnace, and oxygen blast speed control is in 11.2m3/s, total oxygen blow duration control
In 950s；To prevent molten steel from increasing N, blow whole bottom-blowing of converter argon gas 280Nm3/h；Sucking air is prevented, converting process guarantees to turn
Furnace fire door micro-positive pressure 15Pa；Converter terminal blows only 1640 DEG C of temperature, controls terminal C:0.025%, P:0.010%, O:600ppm；Out
Slide plate pushing off the slag is used when steel, the quantity of slag under strict control, tap time 5.5min, and electrolysis manganese alloy 12kg/t is added in when tapping 1/4
Steel, when tapping 1/2, are added lime, and lime adding amount is 0.5kg/t steel；
LF refining technique is added aluminum shot, lime, fluorite using double refinery practices, after entering the station and quickly makes white slag, the aluminium content that enters the station control
System sample examination ingredient after 320ppm, slagging, according to composition adjustment molten steel alloy content；LF power transmission molten steel heating time controls
In 17min, heating rate is 5.5 DEG C/min, and at 1620 DEG C, LF refining time 40min, refining terminates for refining out-station temperature control
Afterwards without Ca processing, Ar gas time 6min is blown only；
RH refinery practice, RH refine recycle stream and use Ar gas, and circulation tolerance is 2200NL/min, and refining process is using whole deep
Vacuum mode；Circulation vacuum degree 0.6mbar, be vacuum-treated 3min after start carry out alloy adjustment, vacuum processing time 22min,
Pure degassing time 6min；Vacuum terminates, and ladle opens argon bottom-blowing after being reduced to low level, and flow control is in 300NL/min；To feed
Ca processing, molten steel Ca content control soft blow time 8min after 22ppm, Ca are disposed are carried out when silk position；
(3) continuous casting working procedure: continuous casting process uses dynamic soft-reduction, increases solidification end drafts, and drafts is increased to by 1.5mm
2.0mm；Continuous casting uses pipe line steel covering slag, and coverture uses Ultra-low carbon coverture, and tensile speed control is used in 1.0m/min
Permanent pulling rate casting, each pours time every stream and takes one block check slab endoplasm situation of sufur printing sample, continuous casting duration 38min, slab is cut
Head 2.5m, tail base cut off 2m；Middle packet Metal Weight 55t, it is middle to wrap surplus steel amount 20t；
(4) slab heating process: 1250 DEG C of bringing-up section temperature, total heating time 210min；
(5) controlled rolling process: rolling is rolled using two-stage control, and the first stage is roughing, using 3+5 passes, slightly
Rolling finishing temperature is 1050 DEG C, and it is 46mm that roughing, which exports workpiece thickness,；Second stage is finish rolling, and entry temperature at finishing control exists
1000 DEG C, by 7 passes of F1-F7 mm finishing mill unit, de-scaling water standard-sized sheet between finishing rolling mill, final reduction rate 21%, second-order
The accumulative reduction ratio of section is 93%, and finish rolling finishing temperature is controlled at 910 DEG C, 600 DEG C of coiling temperature；
(6) section cooling process: 3/4 refrigerating mode is used in the layer cold stage, at 27 DEG C, cooling velocity is controlled for coolant water temperature control
In 40 DEG C/s, every volume water consumption is 4200m3.
The present embodiment has favorable low-temperature impact toughness high-strength crossbeam steel 800L mechanical property: yield strength 757MPa, resists
Tensile strength 817MPa, elongation percentage 18.5%, yield tensile ratio 0.93, -20 DEG C of ballistic works 160J, 164J, 157J, bend test are qualified；Steel
Volume 1/4 position microscopic structure of thickness is shown in Fig. 1, and 1/2 position microscopic structure of coil of strip thickness is shown in Fig. 2, the metallographic group known to Fig. 1 and Fig. 2
It is woven to quasi-polygonal ferrite+acicular ferrite+TiC precipitate, 12.0 grades of grain size.
Embodiment 2
The present embodiment has favorable low-temperature impact toughness high-strength crossbeam steel 800L with a thickness of 6mm, chemical component composition and quality
Percentage composition are as follows: C:0.075%, Si:0.10%, Mn:1.40%, P:0.010%, S:0.002%, Nb:0.055%, Ti:0.110%,
Als:0.035%, N:0.0048%, surplus are impurity in Fe and allowed band.
Production method of the present embodiment with favorable low-temperature impact toughness high-strength crossbeam steel 800L includes molten iron pretreatment, smelting
Refining, continuous casting, slab heating, controlled rolling, section cooling process, specific process step are as described below:
(1) hot metal pre process procedures: pouring into ladle for molten iron after blast furnace process, and bull ladle carries out desulfurization process into desulfurization station, takes off
Molten iron S:0.040% before sulphur, using magnesium powder and lime blowing desulfurization, magnesium powder and lime ratio are controlled 2.7, and the blowing time controls
In 27min, the control of magnesium powder injection rate controls at 39kg/min, desulfurization station desulfurization in 14.2kg/min, lime injection rate
Molten iron S:0.005% after reason；
(2) smelting procedure: converter smelting+LF refining+RH refinery practice is used；
Converter smelting process, basicity of slag control is 3.5 in furnace, and oxygen blast speed control is in 11.5m3/s, total oxygen blow duration control
In 1000s；To prevent molten steel from increasing N, blow whole bottom-blowing of converter argon gas 280Nm3/h；Sucking air is prevented, converting process guarantees
Converter mouth micro-positive pressure 15Pa；Converter terminal blows only 1650 DEG C of temperature, controls terminal C:0.03%, P:0.011%, O:700ppm；
Slide plate pushing off the slag is used when tapping, the quantity of slag under strict control, tap time 6.2min, and electrolytic manganese 12.1kg/t is added in when tapping 1/4
Steel, when tapping 1/2, are added lime, and lime adding amount is 0.7kg/t steel；
LF refining technique is added aluminum shot, lime, fluorite using double refinery practices, after entering the station and quickly makes white slag, the aluminium content that enters the station control
System sample examination ingredient after 350ppm, slagging, according to composition adjustment molten steel alloy content；LF power transmission molten steel heating time controls
In 17min, heating rate is 5.3 DEG C/min, and at 1625 DEG C, LF refining time 45min, refining terminates for refining out-station temperature control
Afterwards without Ca processing, Ar gas time 6min is blown only；
RH refinery practice, RH refine recycle stream and use Ar gas, and circulation tolerance is 2400NL/min, and refining process is using whole deep
Vacuum mode；Circulation vacuum degree 0.8mbar, be vacuum-treated 3min after start carry out alloy adjustment, vacuum processing time 23min,
Pure degassing time 6min；Vacuum terminates, and ladle opens argon bottom-blowing after being reduced to low level, and flow control is in 500NL/min；To feed
Ca processing, molten steel Ca content control soft blow time 8min after 25ppm, Ca are disposed are carried out when silk position；
(3) continuous casting working procedure: continuous casting process uses dynamic soft-reduction, increases solidification end drafts, and drafts is increased to by 1.5mm
2.0mm；Continuous casting uses pipe line steel covering slag, and coverture uses Ultra-low carbon coverture, and tensile speed control is used in 1.1m/min
Permanent pulling rate casting, each pours time every stream and takes one block check slab endoplasm situation of sufur printing sample, continuous casting duration 40min, slab is cut
Head 2.5m, tail base cut off 2m；Middle packet Metal Weight 50t, it is middle to wrap surplus steel amount 18t；
(4) slab heating process: 1250 DEG C of bringing-up section temperature, total heating time 210min；
(5) controlled rolling process: rolling is rolled using two-stage control, and the first stage is roughing, using 3+5 passes, slightly
Rolling finishing temperature is 1050 DEG C, and it is 46mm that roughing, which exports workpiece thickness,；Second stage is finish rolling, and entry temperature at finishing control exists
1050 DEG C, by 7 passes of F1-F7 mm finishing mill unit, de-scaling water standard-sized sheet between finishing rolling mill, final reduction rate 22%, second-order
The accumulative reduction ratio of section is 87%, and finish rolling finishing temperature is controlled at 900 DEG C, 605 DEG C of coiling temperature；
(6) section cooling process: 3/4 refrigerating mode is used in the layer cold stage, at 29 DEG C, cooling velocity is controlled for coolant water temperature control
In 32 DEG C/s, every volume water consumption is 4400m3.
The present embodiment has favorable low-temperature impact toughness high-strength crossbeam steel 800L mechanical property: yield strength 767MPa, resists
Tensile strength 836MPa, elongation percentage 17%, yield tensile ratio 0.92, -20 DEG C of ballistic works 150J, 154J, 157J, bend test are qualified；Coil of strip
1/4 position microscopic structure of thickness is shown in Fig. 3, and 1/2 position microscopic structure of coil of strip thickness is shown in Fig. 4, as can be seen from figs. 3 and 4 metallographic structure
For quasi-polygonal ferrite+acicular ferrite+TiC precipitate, 12.5 grades of grain size.
Embodiment 3
The present embodiment has favorable low-temperature impact toughness high-strength crossbeam steel 800L with a thickness of 8mm, chemical component composition and quality
Percentage composition are as follows: C:0.070%, Si:0.10%, Mn:1.50%, P:0.012%, S:0.002%, Nb:0.048%, Ti:0.120%,
Als:0.035%, N:0.0048%, surplus are impurity in Fe and allowed band.
Production method of the present embodiment with favorable low-temperature impact toughness high-strength crossbeam steel 800L includes molten iron pretreatment, smelting
Refining, continuous casting, slab heating, controlled rolling, section cooling process, specific process step are as described below:
(1) hot metal pre process procedures: pouring into ladle for molten iron after blast furnace process, and bull ladle carries out desulfurization process into desulfurization station, takes off
Molten iron S:0.045% before sulphur, using magnesium powder and lime blowing desulfurization, magnesium powder and lime ratio are controlled 2.8, and the blowing time controls
In 28min, the control of magnesium powder injection rate controls at 39kg/min, desulfurization station desulfurization in 14.7kg/min, lime injection rate
Molten iron S:0.006% after reason；
(2) smelting procedure: converter smelting+LF refining+RH refinery practice is used；
Converter smelting process, basicity of slag control is 4.2 in furnace, and oxygen blast speed control is in 11.7m3/s, total oxygen blow duration control
In 1050s；To prevent molten steel from increasing N, blow whole bottom-blowing of converter argon gas 280Nm3/h；Sucking air is prevented, converting process guarantees
Converter mouth micro-positive pressure 18Pa；Converter terminal blows only 1650 DEG C of temperature, controls terminal C:0.035%, P:0.009%, O:800ppm；
Slide plate pushing off the slag is used when tapping, the quantity of slag under strict control, tap time 5.5min, and electrolytic manganese 12.2kg/t is added in when tapping 1/4
Steel, when tapping 1/2, are added lime, and lime adding amount is 0.6kg/t steel；
LF refining technique is added aluminum shot, lime, fluorite using double refinery practices, after entering the station and quickly makes white slag, the aluminium content that enters the station control
System sample examination ingredient after 370ppm, slagging, according to composition adjustment molten steel alloy content；LF power transmission molten steel heating time controls
In 18min, heating rate is 5.8 DEG C/min, and at 1630 DEG C, LF refining time 50min, refining terminates for refining out-station temperature control
Afterwards without Ca processing, Ar gas time 6min is blown only；
RH refinery practice, RH refine recycle stream and use Ar gas, and circulation tolerance is 2800NL/min, and refining process is using whole deep
Vacuum mode；Circulation vacuum degree 0.7mbar, be vacuum-treated 3min after start carry out alloy adjustment, vacuum processing time 23min,
Pure degassing time 6min；Vacuum terminates, and ladle opens argon bottom-blowing after being reduced to low level, and flow control is in 600NL/min；To feed
Ca processing, molten steel Ca content control soft blow time 8min after 28ppm, Ca are disposed are carried out when silk position；
(3) continuous casting working procedure: continuous casting process uses dynamic soft-reduction, increases solidification end drafts, and drafts is increased to by 1.5mm
2.0mm；Continuous casting uses pipe line steel covering slag, and coverture uses Ultra-low carbon coverture, and tensile speed control is used in 1.2m/min
Permanent pulling rate casting, each pours time every stream and takes one block check slab endoplasm situation of sufur printing sample, continuous casting duration 38min, slab is cut
Head 2.5m, tail base cut off 2m；Middle packet Metal Weight 40t, it is middle to wrap surplus steel amount 19t；
(4) slab heating process: 1250 DEG C of bringing-up section temperature, total heating time 210min；
(5) controlled rolling process: rolling is rolled using two-stage control, and the first stage is roughing, using 3+5 passes, slightly
Rolling finishing temperature is 1050 DEG C, and it is 46mm that roughing, which exports workpiece thickness,；Second stage is finish rolling, and entry temperature at finishing control exists
1000 DEG C, by 7 passes of F1-F7 mm finishing mill unit, de-scaling water standard-sized sheet between finishing rolling mill, final reduction rate 20%, second-order
The accumulative reduction ratio of section is 82%, and finish rolling finishing temperature is controlled at 910 DEG C, 615 DEG C of coiling temperature；
(6) section cooling process: 3/4 refrigerating mode is used in the layer cold stage, coolant water temperature control is at 29.5 DEG C, cooling velocity control
For system in 30 DEG C/s, every volume water consumption is 4800m3.
The present embodiment has favorable low-temperature impact toughness high-strength crossbeam steel 800L mechanical property: yield strength 783MPa, resists
Tensile strength 845MPa, elongation percentage 16%, yield tensile ratio 0.93, -20 DEG C of ballistic works 178J, 180J, 175J, bend test are qualified；Coil of strip
1/4 position microscopic structure of thickness is shown in Fig. 5, and 1/2 position microscopic structure of coil of strip thickness is shown in Fig. 6, the metallographic structure known to Fig. 5 and Fig. 6
For quasi-polygonal ferrite+acicular ferrite+TiC precipitate, 12.5 grades of grain size.
Embodiment 4
The present embodiment has favorable low-temperature impact toughness high-strength crossbeam steel 800L with a thickness of 2.0mm, chemical component composition and matter
Measure percentage composition are as follows: C:0.065%, Si:0.15%, Mn:1.60%, P:0.014%, S:0.003%, Nb:0.045%, Ti:
0.120%, Als:0.025%, N:0.005%, surplus are impurity in Fe and allowed band.
Production method of the present embodiment with favorable low-temperature impact toughness high-strength crossbeam steel 800L includes molten iron pretreatment, smelting
Refining, continuous casting, slab heating, controlled rolling, section cooling process, specific process step are as described below:
(1) hot metal pre process procedures: pouring into ladle for molten iron after blast furnace process, and bull ladle carries out desulfurization process into desulfurization station, takes off
Molten iron S:0.030% before sulphur, using magnesium powder and lime blowing desulfurization, magnesium powder and lime ratio are controlled 2.5, and the blowing time controls
In 24min, the control of magnesium powder injection rate controls at 36kg/min, desulfurization station desulfurization in 13.5kg/min, lime injection rate
Molten iron S:0.008% after reason；
(2) smelting procedure: converter smelting+LF refining+RH refinery practice is used；
Converter smelting process, basicity of slag control is 3.0 in furnace, and oxygen blast speed control is in 11.0m3/s, total oxygen blow duration control
In 900s；To prevent molten steel from increasing N, blow whole bottom-blowing of converter argon gas 350Nm3/h；Sucking air is prevented, converting process guarantees to turn
Furnace fire door micro-positive pressure 10Pa；Converter terminal blows only 1630 DEG C of temperature, controls terminal C:0.040%, P:0.015%, O:500ppm；Out
Slide plate pushing off the slag is used when steel, the quantity of slag under strict control, tap time 5.0min, and electrolytic manganese 12.5kg/t steel is added in when tapping 1/4,
Tap 1/2 when be added lime, lime adding amount is 0.8kg/t steel；
LF refining technique is added aluminum shot, lime, fluorite using double refinery practices, after entering the station and quickly makes white slag, and enter the station Holo-Al content
Control sample examination ingredient after 300ppm, slagging, according to composition adjustment molten steel alloy content；LF power transmission molten steel heating time is controlled
System is in 15min, and heating rate is 5 DEG C/min, and at 1640 DEG C, LF refining time 35min, refining terminates for refining out-station temperature control
Afterwards without Ca processing, Ar gas time 10min is blown only；
RH refinery practice, RH refine recycle stream and use Ar gas, and circulation tolerance is 2000NL/min, and refining process is using whole deep
Vacuum mode；Circulation vacuum degree 1.0mbar, be vacuum-treated 3min after start carry out alloy adjustment, vacuum processing time 25min,
Pure degassing time 10min；Vacuum terminates, and ladle opens argon bottom-blowing after being reduced to low level, and flow control is in 300NL/min；It arrives
Ca processing, molten steel Ca content control soft blow time 6min after 20ppm, Ca are disposed are carried out when feeding silk position；
(3) continuous casting working procedure: continuous casting process uses dynamic soft-reduction, increases solidification end drafts, and drafts is increased to by 1.5mm
2.0mm；Continuous casting uses pipe line steel covering slag, and coverture uses Ultra-low carbon coverture, and tensile speed control is used in 0.9m/min
Permanent pulling rate casting, each pours time every stream and takes one block check slab endoplasm situation of sufur printing sample, continuous casting duration 38min, slab is cut
Head 2.0m, tail base cut off 1.5m；Middle packet Metal Weight 38t, it is middle to wrap surplus steel amount 18t；
(4) slab heating process: 1270 DEG C of bringing-up section temperature, total heating time 200min；
(5) controlled rolling process: rolling is rolled using two-stage control, and the first stage is roughing, using 3+5 passes, slightly
Rolling finishing temperature is 1060 DEG C, and it is 36mm that roughing, which exports workpiece thickness,；Second stage is finish rolling, and entry temperature at finishing control exists
1000 DEG C, by 7 passes of F1-F7 mm finishing mill unit, de-scaling water standard-sized sheet between finishing rolling mill, final reduction rate 23%, second-order
The accumulative reduction ratio of section is 67%, and finish rolling finishing temperature is controlled at 886 DEG C, 583 DEG C of coiling temperature；
(6) section cooling process: 3/4 refrigerating mode is used in the layer cold stage, at 25 DEG C, cooling velocity is controlled for coolant water temperature control
In 50 DEG C/s, every volume water consumption is 5600m3.
The present embodiment has favorable low-temperature impact toughness high-strength crossbeam steel 800L mechanical property: yield strength 785MPa, resists
Tensile strength 818MPa, elongation percentage 15%, yield tensile ratio 0.96, -20 DEG C of ballistic works 168J, 151J, 175J, bend test are qualified；Coil of strip
1/4 position microscopic structure of thickness is shown in Fig. 7, and 1/2 position microscopic structure of coil of strip thickness is shown in Fig. 8, the metallographic structure known to Fig. 7 and Fig. 8
For quasi-polygonal ferrite+acicular ferrite+TiC precipitate, 11.5 grades of grain size.
Embodiment 5
The present embodiment has favorable low-temperature impact toughness high-strength crossbeam steel 800L with a thickness of 16mm, chemical component composition and quality
Percentage composition are as follows: C:0.085%, Si:0.05%, Mn:1.35%, P:0.012%, S:0.002%, Nb:0.065%, Ti:0.105%,
Als:0.015%, N:0.0045%, surplus are impurity in Fe and allowed band.
Production method of the present embodiment with favorable low-temperature impact toughness high-strength crossbeam steel 800L includes molten iron pretreatment, smelting
Refining, continuous casting, slab heating, controlled rolling, section cooling process, specific process step are as described below:
(1) hot metal pre process procedures: pouring into ladle for molten iron after blast furnace process, and bull ladle carries out desulfurization process into desulfurization station, takes off
Molten iron S:0.050% before sulphur, using magnesium powder and lime blowing desulfurization, magnesium powder and lime ratio are controlled 3.0, and the blowing time controls
In 30min, the control of magnesium powder injection rate is controlled in 15kg/min, lime injection rate in 41kg/min, desulfurization station desulfurization process
Molten iron S:0.006% afterwards；
(2) smelting procedure: converter smelting+LF refining+RH refinery practice is used；
Converter smelting process, basicity of slag control is 4.5 in furnace, and oxygen blast speed control is in 12.0m3/s, total oxygen blow duration control
In 1100s；To prevent molten steel from increasing N, blow whole bottom-blowing of converter argon gas 200Nm3/h；Sucking air is prevented, converting process guarantees
Converter mouth micro-positive pressure 20Pa；Converter terminal blows only 1660 DEG C of temperature, controls terminal C:0.020%, P:0.010%, O:900ppm；
Slide plate pushing off the slag is used when tapping, the quantity of slag under strict control, tap time 7min, and electrolytic manganese 11.5kg/t steel is added in when tapping 1/4,
Tap 1/2 when be added lime, lime adding amount is 0.5kg/t steel；
LF refining technique is added aluminum shot, lime, fluorite using double refinery practices, after entering the station and quickly makes white slag, the aluminium content that enters the station control
System sample examination ingredient after 400ppm, slagging, according to composition adjustment molten steel alloy content；LF power transmission molten steel heating time controls
In 20min, heating rate is 6 DEG C/min, and the control of refining out-station temperature is at 1615 DEG C, LF refining time 55min, after refining
Without Ca processing, Ar gas time 8min is blown only；
RH refinery practice, RH refine recycle stream and use Ar gas, and circulation tolerance is 3000NL/min, and refining process is using whole deep
Vacuum mode；Circulation vacuum degree 0.5mbar starts to carry out alloy adjustment, vacuum processing time after being vacuum-treated 3.0min
20min, pure degassing time 8min；Vacuum terminates, and ladle opens argon bottom-blowing after being reduced to low level, and flow control is in 800NL/
min；To Ca processing is carried out when feeding silk position, molten steel Ca content controls the soft blow time 7min after 30ppm, Ca are disposed；
(3) continuous casting working procedure: continuous casting process uses dynamic soft-reduction, increases solidification end drafts, and drafts is increased to by 1.5mm
2.0mm；Continuous casting uses pipe line steel covering slag, and coverture uses Ultra-low carbon coverture, and tensile speed control is used in 1.4m/min
Permanent pulling rate casting, each pours time every stream and takes one block check slab endoplasm situation of sufur printing sample, continuous casting duration 45min, slab is cut
Head 2.0m, tail base cut off 1.8m；Middle packet Metal Weight 65t, it is middle to wrap surplus steel amount 25t；
(4) slab heating process: 1230 DEG C of bringing-up section temperature, total heating time 300min；
(5) controlled rolling process: rolling is rolled using two-stage control, and the first stage is roughing, using 3+5 passes, slightly
Rolling finishing temperature is 1010 DEG C, and it is 50mm that roughing, which exports workpiece thickness,；Second stage is finish rolling, and entry temperature at finishing control exists
1030 DEG C, by 7 passes of F1-F7 mm finishing mill unit, de-scaling water standard-sized sheet between finishing rolling mill, final reduction rate 20.5%, second
It is 80% that stage, which adds up reduction ratio, and finish rolling finishing temperature is controlled at 914 DEG C, 617 DEG C of coiling temperature；
(6) section cooling process: 3/4 refrigerating mode is used in the layer cold stage, at 33 DEG C, cooling velocity is controlled for coolant water temperature control
In 23 DEG C/s, every volume water consumption is 5000m3.
The present embodiment has favorable low-temperature impact toughness high-strength crossbeam steel 800L mechanical property: yield strength 766MPa, resists
Tensile strength 836MPa, elongation percentage 19%, yield tensile ratio 0.92, -20 DEG C of ballistic works 120J, 128J, 133J, bend test are qualified；Coil of strip
1/4 position microscopic structure of thickness is shown in Fig. 9, and 1/2 position microscopic structure of coil of strip thickness is shown in Figure 10, the metallographic group known to Fig. 9 and Figure 10
It is woven to quasi-polygonal ferrite+acicular ferrite+TiC precipitate, 13.0 grades of grain size.
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 (10)
1. one kind has favorable low-temperature impact toughness high-strength crossbeam steel 800L, which is characterized in that the high-strength crossbeam steel 800Lization
It studies and is grouped as and its mass percentage are as follows: C:0.065~0.085%, Si:0.05~0.15%, Mn:1.30~1.60%, P
≤ 0.014%, S≤0.003%, Nb:0.045~0.065%, Ti:0.100~0.120%, Als:0.015~0.035%, N≤
0.005%, surplus is impurity in Fe and allowed band.
2. according to claim 1 a kind of with favorable low-temperature impact toughness high-strength crossbeam steel 800L, which is characterized in that institute
Stating high-strength crossbeam steel 800L thickness specification is 2.0~16.0mm, and metallographic structure is quasi-polygonal ferrite+acicular ferrite+TiC
Precipitate, 11.5~13.0 grades of grain size.
3. according to claim 1 a kind of with favorable low-temperature impact toughness high-strength crossbeam steel 800L, which is characterized in that institute
State high-strength crossbeam steel 800L mechanical property: 720~790MPa of yield strength, 810~900MPa of tensile strength, elongation percentage 15~
19%, yield tensile ratio 0.92~0.96, -20 DEG C of 120~180J of full size bar ballistic work.
4. based on a kind of life with favorable low-temperature impact toughness high-strength crossbeam steel 800L described in claim 1-3 any one
Production method, which is characterized in that the production method includes molten iron pretreatment, smelting, continuous casting, slab heating, controlled rolling, laminar flow
Cooling process；The controlled rolling process, first stage are roughing, and roughing finishing temperature is 1010~1060 DEG C, second stage
For finish rolling, entry temperature at finishing control is at 1000~1050 DEG C, and finish rolling finishing temperature control is at 886~914 DEG C, coiling temperature
583~617 DEG C；The section cooling process uses 3/4 refrigerating mode of leading portion in the layer cold stage, coolant water temperature control 25~
33 DEG C, cooling velocity is controlled in 23~50 DEG C/s.
5. a kind of production method with favorable low-temperature impact toughness high-strength crossbeam steel 800L according to claim 4,
It is characterized in that, the controlled rolling process, rolling is rolled using two-stage control, and the first stage is roughing, is rolled using 3+5 passage
System, roughing finishing temperature are 1010~1060 DEG C, and it is 36~50mm that roughing, which exports workpiece thickness,；Second stage is finish rolling, essence
Roll inlet temperature control at 1000~1050 DEG C, by 7 passes of F1-F7 mm finishing mill unit, de-scaling water standard-sized sheet between finishing rolling mill,
Final reduction rate 20~23%, it is 67~93% that second stage, which adds up reduction ratio, and finish rolling finishing temperature is controlled at 886~914 DEG C,
583~617 DEG C of coiling temperature.
6. a kind of production method with favorable low-temperature impact toughness high-strength crossbeam steel 800L according to claim 4,
Be characterized in that, the section cooling process, the layer cold stage use 3/4 refrigerating mode of leading portion, i.e. one group of water, 4 collectors, every group
3 are opened, every volume water consumption is 4200~5600m3.
7. a kind of life with favorable low-temperature impact toughness high-strength crossbeam steel 800L according to claim 4-6 any one
Production method, which is characterized in that molten iron after blast furnace process is poured into ladle by the hot metal pre process procedures, and bull ladle is into desulfurization station
Carry out desulfurization process, molten iron S:0.030~0.050% before desulfurization, using magnesium powder and lime blowing desulfurization, desulfurization station desulfurization process
Molten iron S≤0.008% afterwards；The magnesium powder and lime ratio are controlled 2.5~3.0, and the control of blowing time is in 24~30min, magnesium powder
Injection rate control is controlled in 13.5~15.0kg/min, lime injection rate in 36~41kg/min.
8. a kind of life with favorable low-temperature impact toughness high-strength crossbeam steel 800L according to claim 4-6 any one
Production method, which is characterized in that the smelting procedure, using converter smelting+LF refining+RH refinery practice；
Converter smelting process, basicity of slag control is 3.0~4.5 in furnace, and oxygen blast speed control is in 11~12m3/s, total oxygen blast
Between control in 900~1100s；To prevent molten steel from increasing N, blow 200~350Nm3/h of whole bottom-blowing of converter argon gas；Prevent sucking empty
Gas, converting process guarantee 10~20Pa of converter mouth micro-positive pressure；Converter terminal blows only 1630~1660 DEG C of temperature, controls terminal C:
0.02~0.04%, P≤0.015%, O:500~900ppm；Slide plate pushing off the slag is used when tapping, the quantity of slag under strict control, when tapping
Between 5~7min, when tapping 1/4 is added electrolysis 11.5~12.5kg/t of manganese alloy steel, and when tapping 1/2 is added lime, and lime is added
Amount is 0.5~0.8kg/t steel；
LF refining technique is added aluminum shot, lime, fluorite using double refinery practices, after entering the station and quickly makes white slag, the aluminium content that enters the station control
System sample examination ingredient after 300~400ppm, slagging, according to composition adjustment molten steel alloy content；When LF power transmission molten steel heats
Between control in 15~20min, heating rate is 5~6 DEG C/min, and the control of refining out-station temperature is at 1615~1640 DEG C, LF refining
35~55min of time blows Ar 6~10min of gas time without Ca processing after refining only；
RH refinery practice, RH refine recycle stream and use Ar gas, and circulation tolerance is 2000~3000NL/min, and refining process uses
Whole depth vacuum mode；Vacuum tank vacuum degree≤1.0mbar starts to carry out alloy adjustment, be vacuum-treated after being vacuum-treated 3min
20~25min of time, pure 6~10min of degassing time；Vacuum terminates, and ladle opens argon bottom-blowing, flow control after being reduced to ground
System is in 300~800NL/min；To Ca processing is carried out when feeding silk position, the control of molten steel Ca content is disposed in 20~30ppm, Ca
6~8min of soft blow time afterwards.
9. a kind of life with favorable low-temperature impact toughness high-strength crossbeam steel 800L according to claim 4-6 any one
Production method, which is characterized in that the continuous casting working procedure, continuous casting process use dynamic soft-reduction, increase solidification end drafts, pressure
Amount increases to 2.0mm by 1.5mm；Continuous casting uses pipe line steel covering slag, and coverture uses Ultra-low carbon coverture, tensile speed control
It in 0.9~1.4m/min, is cast using permanent pulling rate, each pours time every stream and take one block check slab endoplasm situation of sufur printing sample, continuous casting
It is poured 38~45min of duration, 2.0~2.5m of plate blank top crop, tail base cuts off 1.5~2.0m；38~65t of middle packet Metal Weight, in
Wrap surplus 18~25t of steel amount.
10. a kind of with favorable low-temperature impact toughness high-strength crossbeam steel 800L's according to claim 4-6 any one
Production method, which is characterized in that the slab heating process, 1230~1270 DEG C of bringing-up section temperature, total heating time 200~
300min。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811015230.XA CN109161796B (en) | 2018-08-31 | 2018-08-31 | High-strength beam steel 800L with good low-temperature impact toughness and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811015230.XA CN109161796B (en) | 2018-08-31 | 2018-08-31 | High-strength beam steel 800L with good low-temperature impact toughness and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109161796A true CN109161796A (en) | 2019-01-08 |
| CN109161796B CN109161796B (en) | 2020-11-03 |
Family
ID=64893673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811015230.XA Active CN109161796B (en) | 2018-08-31 | 2018-08-31 | High-strength beam steel 800L with good low-temperature impact toughness and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109161796B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110303066A (en) * | 2019-07-31 | 2019-10-08 | 攀钢集团攀枝花钢铁研究院有限公司 | The oil casing pipe steel and its manufacturing method of high side knock function |
| CN110484815A (en) * | 2019-08-08 | 2019-11-22 | 邯郸钢铁集团有限责任公司 | 540Mpa grades of automobile spokes 540LF steel band and its production methods |
| CN110846564A (en) * | 2019-09-30 | 2020-02-28 | 邯郸钢铁集团有限责任公司 | Low-cost high-strength beam steel 750L and production method thereof |
| CN111979393A (en) * | 2019-05-22 | 2020-11-24 | 武汉科技大学 | Hot-rolled high-strength steel plate with excellent low-temperature toughness and preparation method thereof |
| CN112030075A (en) * | 2020-07-24 | 2020-12-04 | 邯郸钢铁集团有限责任公司 | 700 MPa-level automobile girder steel with stable impact toughness and production method thereof |
| CN112662933A (en) * | 2020-11-24 | 2021-04-16 | 莱芜钢铁集团银山型钢有限公司 | Preparation method of low-temperature impact toughness-resistant wind power steel |
| CN112725687A (en) * | 2020-11-18 | 2021-04-30 | 邯郸钢铁集团有限责任公司 | 750BL steel plate with excellent bending and collision resistance for boundary beam and production method thereof |
| CN112828036A (en) * | 2019-11-25 | 2021-05-25 | 上海梅山钢铁股份有限公司 | Method for improving low-temperature impact toughness of thick high-strength steel |
| CN113667897A (en) * | 2021-08-31 | 2021-11-19 | 重庆钢铁股份有限公司 | Low-temperature toughness steel and P, As matching process thereof |
| CN114231838A (en) * | 2021-11-17 | 2022-03-25 | 邯郸钢铁集团有限责任公司 | Low residual stress cold forming high-strength steel S700MC and production method thereof |
| CN114438407A (en) * | 2021-12-29 | 2022-05-06 | 安徽工业大学 | High-fatigue-strength girder steel thick plate and preparation method thereof |
| CN114480973A (en) * | 2022-01-28 | 2022-05-13 | 本钢板材股份有限公司 | Ultra-wide specification 800 MPa-level hot-rolled girder steel and production process thereof |
| CN116145042A (en) * | 2022-12-29 | 2023-05-23 | 邯郸钢铁集团有限责任公司 | Cold-formed high-strength steel S700MC with good rolling performance and production method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000017383A (en) * | 1998-07-03 | 2000-01-18 | Nippon Steel Corp | High atmosphere corrosion resisting steel |
| CN101565794A (en) * | 2008-04-22 | 2009-10-28 | 宝山钢铁股份有限公司 | High-strength hot rolling automotive frame steel plate and manufacturing method thereof |
| CN103757538A (en) * | 2013-12-28 | 2014-04-30 | 首钢总公司 | Wide-thick steel plate for high-Ti 700MPa-level engineering machine and production method |
-
2018
- 2018-08-31 CN CN201811015230.XA patent/CN109161796B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000017383A (en) * | 1998-07-03 | 2000-01-18 | Nippon Steel Corp | High atmosphere corrosion resisting steel |
| CN101565794A (en) * | 2008-04-22 | 2009-10-28 | 宝山钢铁股份有限公司 | High-strength hot rolling automotive frame steel plate and manufacturing method thereof |
| CN103757538A (en) * | 2013-12-28 | 2014-04-30 | 首钢总公司 | Wide-thick steel plate for high-Ti 700MPa-level engineering machine and production method |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111979393A (en) * | 2019-05-22 | 2020-11-24 | 武汉科技大学 | Hot-rolled high-strength steel plate with excellent low-temperature toughness and preparation method thereof |
| CN110303066A (en) * | 2019-07-31 | 2019-10-08 | 攀钢集团攀枝花钢铁研究院有限公司 | The oil casing pipe steel and its manufacturing method of high side knock function |
| CN110303066B (en) * | 2019-07-31 | 2021-01-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel for petroleum casing pipe with high transverse impact energy and manufacturing method thereof |
| CN110484815A (en) * | 2019-08-08 | 2019-11-22 | 邯郸钢铁集团有限责任公司 | 540Mpa grades of automobile spokes 540LF steel band and its production methods |
| CN110484815B (en) * | 2019-08-08 | 2021-08-20 | 邯郸钢铁集团有限责任公司 | 540LF steel strip for 540 MPa-grade automobile spoke and production method thereof |
| CN110846564A (en) * | 2019-09-30 | 2020-02-28 | 邯郸钢铁集团有限责任公司 | Low-cost high-strength beam steel 750L and production method thereof |
| CN112828036A (en) * | 2019-11-25 | 2021-05-25 | 上海梅山钢铁股份有限公司 | Method for improving low-temperature impact toughness of thick high-strength steel |
| CN112030075A (en) * | 2020-07-24 | 2020-12-04 | 邯郸钢铁集团有限责任公司 | 700 MPa-level automobile girder steel with stable impact toughness and production method thereof |
| CN112725687A (en) * | 2020-11-18 | 2021-04-30 | 邯郸钢铁集团有限责任公司 | 750BL steel plate with excellent bending and collision resistance for boundary beam and production method thereof |
| CN112662933A (en) * | 2020-11-24 | 2021-04-16 | 莱芜钢铁集团银山型钢有限公司 | Preparation method of low-temperature impact toughness-resistant wind power steel |
| CN113667897A (en) * | 2021-08-31 | 2021-11-19 | 重庆钢铁股份有限公司 | Low-temperature toughness steel and P, As matching process thereof |
| CN114231838A (en) * | 2021-11-17 | 2022-03-25 | 邯郸钢铁集团有限责任公司 | Low residual stress cold forming high-strength steel S700MC and production method thereof |
| CN114438407A (en) * | 2021-12-29 | 2022-05-06 | 安徽工业大学 | High-fatigue-strength girder steel thick plate and preparation method thereof |
| CN114438407B (en) * | 2021-12-29 | 2022-12-09 | 安徽工业大学 | High-fatigue-strength girder steel thick plate and preparation method thereof |
| CN114480973A (en) * | 2022-01-28 | 2022-05-13 | 本钢板材股份有限公司 | Ultra-wide specification 800 MPa-level hot-rolled girder steel and production process thereof |
| CN116145042A (en) * | 2022-12-29 | 2023-05-23 | 邯郸钢铁集团有限责任公司 | Cold-formed high-strength steel S700MC with good rolling performance and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109161796B (en) | 2020-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109161796A (en) | With favorable low-temperature impact toughness high-strength crossbeam steel 800L and its production method | |
| CN105018861B (en) | A kind of inexpensive normalizing rolling is hot rolled H-shaped and preparation method thereof | |
| CN102277534B (en) | Hot rolled steel section for gas cylinders and production method thereof | |
| CN109321847B (en) | Thick steel plate capable of being welded at high heat input for EH 420-grade ocean engineering and preparation method thereof | |
| CN102268608B (en) | Large capacity high pressure gas cylinder steel and production method thereof | |
| CN102618782A (en) | Large-specification Z-direction H-steel and preparation method thereof | |
| CN111979483A (en) | Method for producing Q345R steel plate by using conventional hot rolling production line | |
| CN109321815A (en) | A kind of manufacturing method of resistance to Large Heat Input Welding high-strength steel plate | |
| CN102703805A (en) | Normalized ship plate steel and production method thereof | |
| CN114645198A (en) | Low-cost and easily-welded pipeline steel hot-rolled coil and preparation method thereof | |
| CN110343940A (en) | The manufacturing method of high anti-corrosion weathering steel | |
| CN113403523B (en) | Production process for producing steel for automobile door hinge by converter | |
| CN112725687B (en) | 750BL steel plate with excellent bending and collision resistance for boundary beam and production method thereof | |
| CN110484825A (en) | A kind of low cost 355MPa is hot rolled H-shaped and preparation method thereof | |
| CN110331328A (en) | The ultra-thin anti-ammonia corrosion moving pressure container steel plate of one kind and its production method | |
| CN107675097B (en) | High-strength steel Q690D steel plate with good side bending performance and production method thereof | |
| CN113862559A (en) | 520 MPa-grade low-yield-ratio wind power steel and preparation method thereof | |
| CN114293101B (en) | Economical high-grade welding wire steel H04E and preparation method thereof | |
| CN107304458B (en) | A kind of hot-rolled steel and its manufacturing method, mooring cable and its manufacturing method | |
| CN105624556A (en) | Hot-rolled pole sheet steel and manufacturing method thereof | |
| CN113234988B (en) | Method for producing weathering steel with yield strength of 700MPa grade by online quenching and product thereof | |
| CN111286673B (en) | High-formability boron-containing steel with tensile strength of more than or equal to 320MPa and production method thereof | |
| CN113604734A (en) | Ultra-thick gauge low residual stress forklift steel and preparation method thereof | |
| CN113684412A (en) | Production method of plastic die steel ZW636 | |
| CN114480973B (en) | Ultra-wide specification 800 MPa-level hot-rolled girder steel and production process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |