CN106282800B - A kind of 345MPa grades of refractory steel plates of surrender and its production method - Google Patents
A kind of 345MPa grades of refractory steel plates of surrender and its production method Download PDFInfo
- Publication number
- CN106282800B CN106282800B CN201610807258.1A CN201610807258A CN106282800B CN 106282800 B CN106282800 B CN 106282800B CN 201610807258 A CN201610807258 A CN 201610807258A CN 106282800 B CN106282800 B CN 106282800B
- Authority
- CN
- China
- Prior art keywords
- temperature
- rolling
- steel
- steel plates
- surrender
- 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.)
- Active
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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- 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
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C21D2211/002—Bainite
-
- 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
Landscapes
- 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 invention discloses a kind of 345MPa grades of refractory steel plates of surrender and its production methods comprising heating, rolling and tempering process；The rolling process uses recrystallization zone+Unhydrated cement two benches controlled rolling process；The weight percentage of the steel plate chemical composition is：C 0.10~0.12%, Si 0.20~0.40%, Mn 1.43~1.53%, P≤0.008%, S≤0.003%, Mo 0.15~0.25%, Nb 0.020~0.030%, Al 0.020~0.050%, V 0.020~0.030%, surplus are Fe and inevitable impurity.The Design of Chemical Composition of this method light plate uses low C, ensures the good weldability of steel plate；It is designed using Nb, V microalloying, being aided with the alloying elements such as Mo ensures armor plate strength, toughness matching and high temperature resistance；Bainite, ferritic complex tissue are obtained using TMCP+ tempering process.The method of the present invention produces steel plate by controlled rolling and controlled cooling+tempering process, and gained, which surrenders 345MPa grades of TMCP+ tempering type refractory steel plates, has the characteristics that low carbon equivalent and crack-sensitivity type index, low yield strength ratio, that low temperature rushes good-toughness, weldability is good.
Description
Technical field
The present invention relates to a kind of refractory steel plates and its production method, especially a kind of 345MPa grades of refractory steel plates of surrender and its
Production method.
Background technology
As the heavy construction of domestic and international steel construction, skyscraper continue to bring out, the anti-ignition technique of steel construction is set in the world
Meter attracts widespread attention, the fire prevention technological design of construction steel structure have become ensure building safety requisite measure it
One.Its intensity and bearing capacity reduce rapidly when common building is heated with steel, cannot meet design requirement.In order to improve using general
The building that logical construction(al)steel is built resists the ability of fire, it is necessary to the measures such as spray refractory coating or covering fire-proof plate are taken,
And refractory coating or fire-proof plate can be thinned or saved using refractory steel, and can guarantee that steel keep higher intensity water at high temperature
It is flat, it can also shorten construction period, mitigate structural quality, increase the safety of building, reduce construction cost, there is significant warp
Benefit of helping and social benefit.
Refractory steel requires good high-temperature behavior, but it is different from the long-term heat resisting steel being on active service at high temperature again, resistance to
Hot steel requires good elevated temperature strength and high-temperature stability, generally uses high-alloy steel.And refractory steel is to hold at normal temperatures
It carries, only requires encountering fire in short-term（Usually 1~3h）Higher yield strength can be kept under hot conditions,
Thus belong to low-alloy structural steel.It is provided in Japanese steel construction safe design specification：2/3 phase of steel yield strength under room temperature
When in the long-term allowable stress value of the material, when a fire, if fire resisting yield of steel still can keep this value, building
Object would not collapse.Therefore, with reference to the regulation in Japanese architecture standard, it is desirable that its yield strength is not under certain high temperature for refractory steel
Less than the 2/3 of room-temperature yield strength.To improve the shock resistance of steel construction, it is always desirable to improve steel as possible and absorb seismic energy
Ability just will produce stress raisers and local large deformation, at this time steel construction when an earthquake occurs if the yield tensile ratio of steel is higher
Less energy can be absorbed, therefore low yield strength ratio is conducive to improve the energy absorbed when building structure earthquake；Generally require antidetonation
Yield tensile ratio≤0.8 of refractory steel.In addition, the yield strength fluctuation range of control construction(al)steel is also extremely important, work as yield strength
When fluctuation is smaller, steel construction is a kind of whole failure mechanism, and whole plastic deformation ability is very high, excellent earthquake resistance, because
This, for Aseismic Design, it is desirable that the steel using narrow surrender section are also very necessary.
Invention content
The technical problem to be solved in the present invention is to provide a kind of 345MPa grades of refractory steel plates of surrender of good performance；The present invention
Additionally provide a kind of production method of 345MPa grades of refractory steel plates of surrender.
In order to solve the above technical problems, the weight percentage of chemical composition of the present invention is：C 0.10~0.12%, Si
0.20~0.40%, Mn 1.43~1.53%, P≤0.008%, S≤0.003%, Mo 0.15~0.25%, Nb 0.020~
0.030%, Al 0.020~0.050%, V 0.020~0.030%, surplus are Fe and inevitable impurity.
Steel plate of the present invention is organized as bainite and ferritic complex tissue.
The method of the present invention includes heating, rolling and tempering process；The rolling process uses recrystallization zone+non-recrystallization
Area's two benches controlled rolling process；The weight percentage of the steel plate chemical composition is as described above.
Rolling process described in the method for the present invention：First stage rolling temperature is 1000~1100 DEG C, and single pass rolling reduction is
10~20%, it is 30~50% to add up reduction ratio；Second stage rolling temperature be 840~910 DEG C, add up reduction ratio be 30~
50%；ACC water coolings are carried out after rolling.The coolant-temperature gage that enters of the ACC water coolings is 760~780 DEG C, 600~650 DEG C of red temperature.
Tempering process described in the method for the present invention：350~400 DEG C of heating temperature, soaking time coefficient 1min/mm.
Heating process described in the method for the present invention：1240~1250 DEG C of the maximum heating temperature of steel billet, soaking temperature 1200~
1220 DEG C, soaking zone time inside furnace >=1h.Total heating time >=1min/mm steel billet thickness.
The mentality of designing of the present invention and method is as follows：Carbon, manganese solution strengthening；A small amount of Nb, V, Mo crystal grain thinning is added,
Carbonitride plays dispersion-strengthened action；By subsequently accurately cooling controlling and rolling controlling process, make steel plate that there is good mechanical property.
Wherein, the effect of each component and content in the present invention is：
C：Carbon makes a significant impact the surrender of steel, tensile strength, welding performance.Carbon can be significantly improved by gap solid solution
Armor plate strength, but carbon content is excessively high, and the welding performance and toughness of steel can be influenced.
Si：It is used as reducing agent and deoxidier in steelmaking process, while Si can also play solution strengthening effect, but is more than
When 0.5%, the toughness of steel can be caused to decline, reduce the welding performance of steel.
Mn：Manganese is of low cost, can increase the toughness, intensity and hardness of steel, improve the quenching degree of steel, the heat for improving steel adds
Work performance；Manganese amount is excessively high, center segregation easily occurs for big thickness steel plate.
P、S：Under normal circumstances, p and s are all harmful elements in steel, increase the brittleness of steel.Phosphorus makes welding performance become
It is bad, reduce plasticity；Sulphur reduces the ductility and toughness of steel, and crackle is caused in rolling；Therefore p and s should be reduced to the greatest extent in steel
In content.
Al：Aluminium is common deoxidier in steel.A small amount of aluminium is added in steel, can crystal grain thinning, improve impact flexibility.Aluminium is also
It is excessively high with inoxidizability and corrosion resistance, influence hot-working character, the welding performance and cutting performance of steel.
Nb：The crystal grain refinement for being added to promote steel rolling microscopic structure of niobium, can improve intensity and toughness, niobium simultaneously
Can be in During Controlled Rolling by inhibiting austenite recrystallization, effective refinement microstructure, and pass through precipitation strength matrix.Welding
In the process, the roughening of austenite grain when the segregation of niobium atom and precipitation can hinder to heat, and compared after ensureing welding
Tiny heat affected zone organization, improving welding property.
V：The main function of V is the alternate precipitation in γ-α transition processes and the precipitation strength in ferrite.
Mo：The main function of Mo improves high tempering stability, significantly improves the elevated temperature strength of steel.
It is using advantageous effect caused by above-mentioned technical proposal：Design of Chemical Composition of the present invention uses low C, ensures steel
The good weldability of plate；Using Nb, V microalloying design, be aided with the alloying elements such as Mo, it is ensured that armor plate strength, toughness matching and
High temperature resistance；The present invention has good fire resistance, is organized as bainite, ferritic complex tissue, has antidetonation effect
Fruit is good, heat safe feature；Present invention drawing >=230MPa 600 DEG C high, yield strength >=345MPa, tensile strength >=490MPa,
Yield tensile ratio≤0.83,0 DEG C ballistic work >=34J, steel plate maximum gauge can reach 20mm.
The Design of Chemical Composition of the method for the present invention light plate uses low C, ensures the good weldability of steel plate；It is micro- using Nb, V
Alloying Design, being aided with the alloying elements such as Mo ensures armor plate strength, toughness matching and high temperature resistance；Using TMCP+ Temperers
Skill obtains bainite, ferritic complex tissue.The method of the present invention produces steel plate by controlled rolling and controlled cooling+tempering process, and gained is bent
Take 345MPa grades of TMCP+ tempering type refractory steel plates（Q345FRC）With good weldability, low weld crack sensitivity coefficient
（Pcm）0.19~0.21%；Yield strength is in 400~460MPa, and tensile strength between 570~590MPa, bend by 600 DEG C of high temperature
Take 250~270MPa, 0 DEG C of ballistic work >=150J；Steel plate maximum gauge can reach 20mm；With bainite, ferritic compound
Tissue.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the micro-organization chart of the steel plate of embodiment 1；
Fig. 2 is the micro-organization chart of the steel plate of embodiment 2；
Fig. 3 is the micro-organization chart of the steel plate of embodiment 3；
Fig. 4 is the micro-organization chart of the steel plate of embodiment 4.
Specific implementation mode
345MPa grades of refractory steel plates of this surrender are produced using following methods：
（1）Smelting procedure：Molten steel is sent into LF refining furnace refining first through electric furnace smelting, and when refining feeds Al lines；Liquid steel temperature
It meets or exceeds 1540 ± 10 DEG C and is transferred to VD stove Fruit storages, CaSi blocks >=100kg or Fe- is added before Fruit storage
400~450m of Ca lines changes inclusion morphology, vacuum degree≤66.6Pa of Fruit storage, vacuum retention time >=20min.
Tapping ladle chemistry weight percentage be：C 0.10~0.12%, Si 0.20~0.40%, Mn 1.43~1.53%,
P≤0.008%, S≤0.003%, Mo 0.15~0.25%, Nb 0.020~0.030%, Al 0.020~0.050%, V 0.020
~0.030%, surplus is Fe and inevitable impurity.
（2）Continuous casting working procedure：It is become a useful person using 200mm thickness continuous casting billets.
（3）Heating process：1240~1250 DEG C of the maximum heating temperature of steel billet, 1200~1220 DEG C of soaking temperature are total to add
Hot time >=1min/mm steel billet thickness, soaking zone time inside furnace >=60min.
（4）Rolling process：It is rolled using recrystallization zone+Unhydrated cement two benches controlled rolling process, obtains semi-finished product
Steel plate；First stage rolling temperature is 1000~1100 DEG C, this stage single pass rolling reduction is 10~20%, and accumulative reduction ratio is
30~50%；Second stage rolling temperature is 840~910 DEG C, and it is 30~50% to add up reduction ratio；ACC water coolings are carried out after rolling, and are entered
760~780 DEG C of coolant-temperature gage, 600~650 DEG C of red temperature.
（5）Tempering process：Semi-finished product steel plate is tempered；350~400 DEG C of heating temperature, soaking time coefficient 1min/
mm；It can be obtained the refractory steel plates that maximum gauge can reach 20mm.
Embodiment 1：The specific production technology of 345MPa grades of refractory steel plates of this surrender is as described below.
（1）It smelts：Molten steel first through electric furnace smelting, is sent into LF refining furnace refining, and liquid steel temperature reaches 1540 DEG C and is transferred to VD stoves
CaSi blocks 100kg is added before VD for Fruit storage；The vacuum degree 66.6Pa of Fruit storage, vacuum retention time
20min；The weight percentage of tapping ladle chemistry is shown in Table 1.
（2）Continuous casting：It is casting continuously to form the continuous casting billet of 200mm thickness.
（3）Heating：1250 DEG C of maximum heating temperature, 1220 DEG C of soaking temperature, total heating time 204min, soaking zone is in stove
Time 1h.
（4）Rolling：First stage rolling temperature is 1030 DEG C, single pass rolling reduction 20%, and it is 50% to add up reduction ratio；
Second stage rolling temperature is 840 DEG C, and it is 30% to add up reduction ratio；ACC water coolings are carried out after rolling, and are entered 780 DEG C of coolant-temperature gage, are returned red temperature
650 DEG C of degree.
（5）Tempering：381 DEG C of heating temperature, soaking time coefficient 1min/mm.
The mechanical property of 10mm thickness refractory steel plates obtained by the present embodiment：Yield strength 422MPa, tensile strength 572MPa,
0.73,600 DEG C of yield tensile ratio is high to draw 289MPa, and 0 DEG C of ballistic work is averaged 210J；Macrograph is shown in Fig. 1, it is organized as seen from Figure 1
Bainite and ferritic complex tissue.
Embodiment 2：The specific production technology of 345MPa grades of refractory steel plates of this surrender is as described below.
（1）It smelts：Molten steel first through electric furnace smelting, is sent into LF refining furnace refining, and 1550 DEG C of liquid steel temperature is transferred to VD stove vacuum
Fe-Ca lines 400m is added before VD and changes inclusion morphology for degassing process；The vacuum degree 66Pa of Fruit storage, vacuum are kept
Time 24min；The weight percentage of tapping ladle chemistry is shown in Table 1.
（2）Continuous casting：It is casting continuously to form the continuous casting billet of 200mm thickness.
（3）Heating：1245 DEG C of billet heating temperature highest, 1218 DEG C of soaking temperature, total heating time 210min, soaking zone
Time inside furnace 61min.
（4）Rolling：First stage rolling temperature is 1100 DEG C, single pass rolling reduction 10%, and it is 30% to add up reduction ratio；
Second stage rolling temperature is 910 DEG C, and it is 30% to add up reduction ratio, and ACC water coolings are carried out after rolling, enters 780 DEG C of coolant-temperature gage, returns red temperature
600 DEG C of degree.
（5）Tempering：389 DEG C of heating temperature, soaking time coefficient 1min/mm.
The mechanical property of 10mm thickness refractory steel plates obtained by the present embodiment：Yield strength 410MPa, tensile strength 571MPa,
0.72,600 DEG C of yield tensile ratio is high to draw 280MPa, and 0 DEG C of ballistic work is averaged 100J；Macrograph is shown in Fig. 2, it is organized as seen from Figure 2
Bainite and ferritic complex tissue.
Embodiment 3：The specific production technology of 345MPa grades of refractory steel plates of this surrender is as described below.
（1）It smelts：Molten steel first through electric furnace smelting, is sent into LF refining furnace refining, and 1530 DEG C of liquid steel temperature is transferred to VD stove vacuum
CaSi blocks 110kg is added before VD and changes inclusion morphology for degassing process；The vacuum degree 60Pa of Fruit storage, vacuum are kept
Time 25min；The weight percentage of tapping ladle chemistry is shown in Table 1.
（2）Continuous casting：It is casting continuously to form the continuous casting billet of 200mm thickness.
（3）Heating：1240 DEG C of maximum heating temperature, 1220 DEG C of soaking temperature, total heating time 220min, soaking zone is in stove
Time 1.5h.
（4）Rolling：First stage rolling temperature is 1050 DEG C, single pass rolling reduction 15%, and it is 38% to add up reduction ratio；
Second stage rolling temperature is 880 DEG C, and it is 40% to add up reduction ratio；ACC water coolings are carried out after rolling, and are entered 780 DEG C of coolant-temperature gage, are returned red temperature
650 DEG C of degree.
（5）Tempering：400 DEG C of heating temperature, soaking time coefficient 1min/mm.
The mechanical property of 20mm thickness refractory steel plates obtained by the present embodiment：434 MPa of yield strength, tensile strength 582
MPa, 0.75,600 DEG C of yield tensile ratio is high to draw 266MPa, and 0 DEG C of ballistic work is averaged 123J；Macrograph is shown in Fig. 3, as seen from Figure 3 its group
It is woven to bainite and ferritic complex tissue.
Embodiment 4：The specific production technology of 345MPa grades of refractory steel plates of this surrender is as described below.
（1）It smelts：Molten steel first through electric furnace smelting, is sent into LF refining furnace refining, and 1535 DEG C of liquid steel temperature is transferred to VD stove vacuum
Fe-Ca lines 450m is added before VD and changes inclusion morphology for degassing process；The vacuum degree 62Pa of Fruit storage, vacuum are kept
Time 26min；The weight percentage of tapping ladle chemistry is shown in Table 1.
（2）Continuous casting：It is casting continuously to form the continuous casting billet of 200mm thickness.
（3）Heating：1250 DEG C of maximum heating temperature, 1220 DEG C of soaking temperature, total heating time 220min, soaking zone is in stove
Time 1.2h.
（4）Rolling：First stage rolling temperature is 1000 DEG C, this stage single pass rolling reduction is 18%, and accumulative reduction ratio is
40%；Second stage rolling temperature is 900 DEG C, and it is 42% to add up reduction ratio, and ACC water coolings are carried out after rolling, enter 770 DEG C of coolant-temperature gage,
650 DEG C of red temperature.
（5）Tempering：350 DEG C of heating temperature, soaking time coefficient 1min/mm.
The mechanical property of 15mm thickness refractory steel plates obtained by the present embodiment：Yield strength 455MPa, tensile strength
589MPa, 0.77,600 DEG C of yield tensile ratio is high to draw 260MPa, and 0 DEG C of ballistic work is averaged 132J；Macrograph is shown in Fig. 4, as seen from Figure 4 its
It is organized as bainite and ferritic complex tissue.
Embodiment 5：The specific production technology of 345MPa grades of refractory steel plates of this surrender is as described below.
（1）It smelts：Molten steel first through electric furnace smelting, is sent into LF refining furnace refining, and liquid steel temperature reaches 1545 DEG C and is transferred to VD stoves
CaSi blocks 120kg is added before VD for Fruit storage；The vacuum degree 65Pa of Fruit storage, vacuum retention time 30min；
The weight percentage of tapping ladle chemistry is shown in Table 1.
（2）Continuous casting：It is casting continuously to form the continuous casting billet of 200mm thickness.
（3）Heating：1248 DEG C of maximum heating temperature, 1220 DEG C of soaking temperature, total heating time 200min, soaking zone is in stove
Time 65min.
（4）Rolling：First stage rolling temperature is 1080 DEG C, single pass rolling reduction 12%, and it is 32% to add up reduction ratio；
Second stage rolling temperature is 860 DEG C, and it is 50% to add up reduction ratio；ACC water coolings are carried out after rolling, and are entered 780 DEG C of coolant-temperature gage, are returned red temperature
620 DEG C of degree.
（5）Tempering：370 DEG C of heating temperature, soaking time coefficient 1min/mm.
The mechanical property of 15mm thickness refractory steel plates obtained by the present embodiment：Yield strength 402MPa, tensile strength 559MPa,
0.72,600 DEG C of yield tensile ratio is high to draw 281MPa, and 0 DEG C of ballistic work is averaged 223J.
Embodiment 6：The specific production technology of 345MPa grades of refractory steel plates of this surrender is as described below.
（1）It smelts：Molten steel first through electric furnace smelting, is sent into LF refining furnace refining, and liquid steel temperature reaches 1540 DEG C and is transferred to VD stoves
Fe-Ca lines 420m is added before VD for Fruit storage；The vacuum degree 64Pa of Fruit storage, vacuum retention time 25min；
The weight percentage of tapping ladle chemistry is shown in Table 1.
（2）Continuous casting：It is casting continuously to form the continuous casting billet of 200mm thickness.
（3）Heating：1243 DEG C of maximum heating temperature, 1220 DEG C of soaking temperature, total heating time 208min, soaking zone is in stove
Time 80min.
（4）Rolling：First stage rolling temperature is 1040 DEG C, single pass rolling reduction 14%, and it is 45% to add up reduction ratio；
Second stage rolling temperature is 870 DEG C, and it is 36% to add up reduction ratio；ACC water coolings are carried out after rolling, and are entered 760 DEG C of coolant-temperature gage, are returned red temperature
630 DEG C of degree.
（5）Tempering：360 DEG C of heating temperature, soaking time coefficient 1min/mm.
The mechanical property of 20mm thickness refractory steel plates obtained by the present embodiment：Yield strength 431MPa, tensile strength 569MPa,
0.76,600 DEG C of yield tensile ratio is high to draw 299MPa, and 0 DEG C of ballistic work is averaged 231J.
Table 1：The weight percentage of each embodiment light plate chemical composition（wt%）
In table 1, the surplus of chemical composition is Fe and inevitable impurity.
By above-described embodiment it is found that 345MPa grades of TMCP+ tempering type refractory steel plates steel plates of surrender of this method production have
Low carbon equivalent and crack-sensitivity type index, low yield strength ratio, the features such as low temperature rushes good-toughness, weldability is good.
Claims (3)
1. a kind of production method of 345MPa grades of refractory steel plates of surrender, it is characterised in that：It includes heating, rolling and Temperer
Sequence；The rolling process uses recrystallization zone+Unhydrated cement two benches controlled rolling process；The weight of the steel plate chemical composition
Percentage composition is：C 0.10~0.12%, Si 0.20~0.40%, Mn 1.43~1.53%, P≤0.008%, S≤0.003%, Mo
0.15~0.25%, Nb 0.020~0.030%, Al 0.020~0.050%, V 0.020~0.030%, surplus are Fe and can not
The impurity avoided；
The rolling process：First stage rolling temperature is 1000~1100 DEG C, and single pass rolling reduction is 10~20%, adds up pressure
Lower rate is 30~50%；Second stage rolling temperature is 840~910 DEG C, and it is 30~50% to add up reduction ratio；ACC is carried out after rolling
Water cooling；The coolant-temperature gage that enters of the ACC water coolings is 760~780 DEG C, 600~650 DEG C of red temperature；
The tempering process：350~400 DEG C of heating temperature, soaking time coefficient 1min/mm.
2. a kind of production method of 345MPa grades of refractory steel plates of surrender according to claim 1, which is characterized in that described to add
Thermal process：1240~1250 DEG C of the maximum heating temperature of steel billet, 1200~1220 DEG C of soaking temperature, soaking zone time inside furnace >=
1h。
3. a kind of production method of 345MPa grades of refractory steel plates of surrender according to claim 2, it is characterised in that：Total heating
Time >=1min/m steel billet thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610807258.1A CN106282800B (en) | 2016-09-07 | 2016-09-07 | A kind of 345MPa grades of refractory steel plates of surrender and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610807258.1A CN106282800B (en) | 2016-09-07 | 2016-09-07 | A kind of 345MPa grades of refractory steel plates of surrender and its production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106282800A CN106282800A (en) | 2017-01-04 |
| CN106282800B true CN106282800B (en) | 2018-10-09 |
Family
ID=57710894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610807258.1A Active CN106282800B (en) | 2016-09-07 | 2016-09-07 | A kind of 345MPa grades of refractory steel plates of surrender and its production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106282800B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108728730B (en) * | 2017-04-24 | 2020-01-07 | 鞍钢股份有限公司 | 315MPa high-performance building structure mild steel and manufacturing method thereof |
| CN107739992A (en) * | 2017-09-29 | 2018-02-27 | 舞阳钢铁有限责任公司 | Normalizing type surrenders 345MPa levels weather-resistant steel plate and its production method |
| CN108486495B (en) * | 2018-06-01 | 2019-08-23 | 钢铁研究总院 | A kind of high-strength fireproof steel and preparation method thereof for steel building |
| CN109136740A (en) * | 2018-07-03 | 2019-01-04 | 舞阳钢铁有限责任公司 | Low cost 485MPa grades of pipe fitting steel plates of surrender and its production method |
| CN115323271B (en) * | 2022-07-31 | 2023-09-26 | 包头钢铁（集团）有限责任公司 | Low-yield-ratio high-low-temperature-toughness fire-resistant hot rolled steel plate with yield strength of 390MPa and preparation method thereof |
| CN115572913B (en) * | 2022-09-08 | 2023-07-25 | 舞阳钢铁有限责任公司 | Fireproof high-strength steel and production method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101691643A (en) * | 2009-10-15 | 2010-04-07 | 武汉钢铁(集团)公司 | Refractory anti-seismic construction steel for high-toughness welding structures, and production method thereof |
| CN102952994A (en) * | 2011-08-25 | 2013-03-06 | 宝山钢铁股份有限公司 | Fire-resistant and earthquake-resistant steel for construction and production method thereof |
-
2016
- 2016-09-07 CN CN201610807258.1A patent/CN106282800B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101691643A (en) * | 2009-10-15 | 2010-04-07 | 武汉钢铁(集团)公司 | Refractory anti-seismic construction steel for high-toughness welding structures, and production method thereof |
| CN102952994A (en) * | 2011-08-25 | 2013-03-06 | 宝山钢铁股份有限公司 | Fire-resistant and earthquake-resistant steel for construction and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106282800A (en) | 2017-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106282800B (en) | A kind of 345MPa grades of refractory steel plates of surrender and its production method | |
| CN100494451C (en) | Superhigh strength steel plate with yield strength more than 960Mpa and method for producing same | |
| CN104711488B (en) | Big 690 grades of ocean engineering high strength steel plates of thickness F and its production method | |
| CN103014554B (en) | Low-yield-ratio high-tenacity steel plate and manufacture method thereof | |
| CN104911503B (en) | A kind of special thick quenched ocean engineering EH40 steel and preparation method thereof | |
| CN108914006B (en) | Ultrahigh-strength quenched and tempered steel plate with excellent performance in thickness direction and manufacturing method thereof | |
| CN107475620B (en) | Low-temperature pressure container quenching and tempering type A537Cl2 steel plate and its production method | |
| CN109182919B (en) | Production method of multiphase structure high-toughness ship plate steel EH47 | |
| CN104789866B (en) | 630MPa level quenching and tempering type low temperature spherical tank high-strength and high-ductility steel plate and its manufacture method | |
| CN101928885B (en) | Hydrothion corrosion resistant pipe steel and production method thereof | |
| CN105779883A (en) | 485MPa level TMCP+ tempering weather-proof bridge steel plate and production method | |
| CN103898418B (en) | Large thickness Ni is low-temperature (low temperature) vessel steel plate and production method thereof | |
| CN102400043B (en) | Large-thickness steel plate for oceaneering | |
| CN104357742B (en) | 420MPa high-thickness hot-rolled steel sheet for ocean engineering and production method thereof | |
| US20220411907A1 (en) | 690 mpa-grade medium manganese steel medium thick steel with high strength and low yield ratio and manufacturing method therefor | |
| CN108728743A (en) | The good Marine Engineering Steel of low temperature fracture toughness and its manufacturing method | |
| CN105925904B (en) | The excellent steel plate containing Mo of a kind of high-temp and high-strength, low-temperature impact toughness and its manufacture method | |
| CN106498296A (en) | A kind of manufacture method of yield strength 1100MPa level high-strength steel | |
| CN102653845A (en) | Steel plate for LPG (Liquefied Petroleum Gas) ship storage tank and production method of steel plate | |
| CN104372257A (en) | Low-alloy high-strength middle-thickness plate capable of utilizing self-tempering waste heat to improve toughness and preparation method of low-alloy high-strength middle-thickness plate | |
| CN102676920A (en) | Large-thickness steel plate for low-temperature pressure container and production method thereof | |
| CN109161671A (en) | A kind of Large Heat Input Welding high intensity EH36 steel plate and its manufacturing method | |
| CN102653846B (en) | Large-thickness easy-to-weld quenched and tempered high-strength steel plate for hydroelectricity and manufacturing method thereof | |
| CN106591718A (en) | High-toughness antiacid quenched and tempered pipe steel plate with yield strength being 420 MPa grade and production method | |
| CN107326304A (en) | A kind of TMCP types surrender 500MPa grades of bridge steel plates and production method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |