CN108220778A - A kind of high-strength vehicle bridge steel of niobium vanadium complex intensifying and its production method - Google Patents
A kind of high-strength vehicle bridge steel of niobium vanadium complex intensifying and its production method Download PDFInfo
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- CN108220778A CN108220778A CN201810055218.5A CN201810055218A CN108220778A CN 108220778 A CN108220778 A CN 108220778A CN 201810055218 A CN201810055218 A CN 201810055218A CN 108220778 A CN108220778 A CN 108220778A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
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Abstract
The invention discloses a kind of high-strength vehicle bridge steel of niobium vanadium complex intensifying and its production method, the vehicle bridge is formed with steel chemical composition and its mass percentage is：C：0.15~0.20%, Si：0.20~0.40%, Mn：1.40~1.60%, P≤0.015%, S≤0.010%, V >=0.04%, Nb >=0.04%, Ti >=0.01%, Als≤0.045%, surplus are Fe and inevitable impurity element；Production method includes vanadium extraction by converter blowing, converter smelting, LF refining, sheet billet continuous casting, heating of plate blank, high-pressure water descaling, controlled rolling, control section cooling, coiling process.The present invention forms stable carbide and nitride in steel by vanadium, niobium micro-alloy element with carbon, generate refined crystalline strengthening and precipitation strength, and controlled rolling and control is coordinated to be cooled into pearlite+ferritic structure, obtain high-strength, high tenacity, thermoforming axle housing steel.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of high-strength vehicle bridge steel of niobium vanadium complex intensifying and its producer
Method.
Background technology
Axle housing, is the basic part for installing main reducing gear, differential mechanism, semiaxis, wheel hub and suspension, and main function is to support and protect
Protect main reducing gear, differential mechanism and semiaxis etc..Meanwhile axle housing is one of main component parts of running gear again.Country axle housing master at present
It is divided into 3 kinds of monoblock type, releasable and combined type, product of the present invention is mainly used for making banjo axle.
The present invention adds microalloy element vanadium, niobium on the basis of carbon, manganese systems low-alloy steel, passes through vanadium, niobium micro-alloy member
Element forms stable carbide and nitride in steel with carbon, and refined crystalline strengthening and precipitation strength are generated, and control is coordinated to roll to steel
System and control are cooled into pearlite and ferritic structure, obtain high-strength, high tenacity, thermoforming axle housing steel.Realize height
By force, high tenacity, thermoforming axle housing steel, tensile strength >=670MPa, elongation percentage >=18%, yield strength >=500MPa are low
The minus 20 degree of impact >=47J of temperature.
Invention content
The technical problem to be solved in the present invention is to provide a kind of high-strength vehicle bridge steel of niobium vanadium complex intensifying and its production methods.
In order to solve the above technical problems, the technical solution adopted by the present invention is that：A kind of high-strength vehicle bridge of niobium vanadium complex intensifying is used
Steel, the vehicle bridge is formed with steel chemical composition and its mass percentage is：C：0.15~0.20%, Si：0.20~0.40%,
Mn：1.40~1.60%, P≤0.015%, S≤0.010%, V >=0.04%, Nb >=0.04%, Ti >=0.01%, Als≤0.045%,
Surplus is Fe and inevitable impurity element.
Vehicle bridge steel thickness 10-14mm of the present invention, width 1250-1600mm.
Vehicle bridge of the present invention Steel Properties index：Tensile strength >=670MPa, elongation percentage >=18%, yield strength >=
500MPa, -20 DEG C of ballistic work >=47J of low temperature.
Vehicle bridge of the present invention is pearlite+ferrite with structure of steel, and medium pearlite accounts for 10-30%.
The present invention also provides a kind of production method of the high-strength vehicle bridge steel of niobium vanadium complex intensifying, the production method includes
Vanadium extraction by converter blowing, converter smelting, LF refining, sheet billet continuous casting, heating of plate blank, high-pressure water descaling, controlled rolling, control section cooling,
Coiling process；The controlled rolling process includes roughing rolling, Coil Box, finish rolling rolling mill practice.
Controlled rolling process of the present invention, roughing are 5 passes, and workpiece thickness >=55mm, outlet temperature is
1020~1060 DEG C.
Controlled rolling process of the present invention, 7 rolling mill of finish rolling, F5-F7 racks total reduction are more than 30%, outlet temperature
It is 840~880 DEG C.
Control laminar flow cooling process of the present invention, refrigerating mode is concentrated using above and below leading portion 100%.
Heating of plate blank process of the present invention, using straight dress heating of plate blank, steel slab is heated to 1160~1200 DEG C, adds
Hot time control is in≤160min.
Coiling process of the present invention, 560-600 DEG C of coiling temperature batch offline stacking slow cooling.
Converter smelting process of the present invention is according to set component smelting molten steel, and molten steel is through LF refining, continuous casting protective casting
Obtain slab.
A kind of niobium vanadium complex intensifying high-strength vehicle bridge steel product standard of the present invention and method for testing performance refer to GB/
T33166-2016。
It is using advantageous effect caused by above-mentioned technical proposal：1st, the present invention is on the basis of carbon, manganese systems low-alloy steel
Upper addition microalloy element vanadium, niobium, stable carbide and nitride are formed by vanadium, niobium micro-alloy element in steel with carbon,
Refined crystalline strengthening and precipitation strength are generated, and controlled rolling and control is coordinated to be cooled into pearlite+ferritic structure, is obtained high
By force, high tenacity, thermoforming axle housing steel.2nd, vehicle bridge steel tensile strength >=670MPa produced by the invention, elongation percentage >=
18%, yield strength >=500MPa, -20 DEG C of ballistic work >=47J of low temperature.
Specific embodiment
With reference to specific embodiment, the present invention will be further described in detail.
Embodiment 1
The high-strength vehicle bridge steel thickness 10mm of the present embodiment niobium vanadium complex intensifying, width 1400mm, the high-strength vehicle bridge of niobium vanadium complex intensifying
It is with steel chemical composition composition and its mass percentage：C：0.17%, Si：0.26%, Mn：1.45%, P：0.013%, S：
0.004%, V：0.046%, Ti：0.012%, Nb：0.045%, Als：0.021%, surplus is Fe and inevitable impurity element.
The high-strength vehicle bridge steel production method of the present embodiment niobium vanadium complex intensifying include vanadium extraction by converter blowing, converter smelting, LF refining,
Sheet billet continuous casting, heating of plate blank, high-pressure water descaling, controlled rolling, control section cooling, coiling process, specific process step are as follows
It is described：
（1）Smelting molten steel is formed according to set component, molten steel obtains slab through LF refining, continuous casting protective casting；
（2）Heating of plate blank：Using straight dress heating of plate blank, steel slab is heated to 1190 DEG C, heating time 122min；
（3）Controlled rolling：Roughing is 5 passes, and workpiece thickness 55.8mm, outlet temperature is 1026 DEG C；7 frame of finish rolling rolls
Machine, F5-F7 rack reduction ratios are respectively F5：15.6%、F6：16.2%、F7：16.8%；Outlet temperature is 858 DEG C；
（4）Control section cooling：Refrigerating mode is concentrated using above and below leading portion 100%；
（5）It batches：578 DEG C of coiling temperature, batches offline stacking slow cooling.
The high-strength vehicle bridge of the present embodiment niobium vanadium complex intensifying is pearlite+ferrite with structure of steel, and medium pearlite accounts for 15%,
Microscopic structure composition is shown in Table 1；Mechanical performance index is shown in Table 2.
Embodiment 2
The high-strength vehicle bridge steel thickness 12mm of the present embodiment niobium vanadium complex intensifying, width 1500mm, the high-strength vehicle bridge of niobium vanadium complex intensifying
It is with steel chemical composition composition and its mass percentage：C：0.18%, Si：0.32%, Mn：1.44%, P：0.012%, S：
0.005%, V：0.047%, Ti：0.012%, Nb：0.046%, Als：0.023%, surplus is Fe and inevitable impurity element.
The high-strength vehicle bridge steel production method of the present embodiment niobium vanadium complex intensifying include vanadium extraction by converter blowing, converter smelting, LF refining,
Sheet billet continuous casting, heating of plate blank, high-pressure water descaling, controlled rolling, control section cooling, coiling process, specific process step are as follows
It is described：
（1）Smelting molten steel is formed according to set component, molten steel obtains slab through LF refining, continuous casting protective casting；
（2）Heating of plate blank：Using straight dress heating of plate blank, steel slab is heated to 1180 DEG C, heating time 128min；
（3）Controlled rolling：Roughing is 5 passes, and workpiece thickness 55.8mm, outlet temperature is 1032 DEG C；7 frame of finish rolling rolls
Machine, F5-F7 rack reduction ratios are respectively F5：15.6%、F6：16.7%、F7：17.6%；Outlet temperature is 864 DEG C；
（4）Control section cooling：Refrigerating mode is concentrated using above and below leading portion 100%；
（5）It batches：573 DEG C of coiling temperature, batches offline stacking slow cooling.
The high-strength vehicle bridge of the present embodiment niobium vanadium complex intensifying is pearlite+ferrite with structure of steel, and medium pearlite accounts for 22%,
Microscopic structure composition is shown in Table 1；Mechanical performance index is shown in Table 2.
Embodiment 3
The high-strength vehicle bridge steel thickness 14mm of the present embodiment niobium vanadium complex intensifying, width 1500mm, the high-strength vehicle bridge of niobium vanadium complex intensifying
It is with steel chemical composition composition and its mass percentage：C：0.18%, Si：0.32%, Mn：1.44%, P：0.012%, S：
0.005%, V：0.047%, Ti：0.012%, Nb：0.046%, Als：0.023%, surplus is Fe and inevitable impurity element.
The high-strength vehicle bridge steel production method of the present embodiment niobium vanadium complex intensifying include vanadium extraction by converter blowing, converter smelting, LF refining,
Sheet billet continuous casting, heating of plate blank, high-pressure water descaling, controlled rolling, control section cooling, coiling process, specific process step are as follows
It is described：
（1）Smelting molten steel is formed according to set component, molten steel obtains slab through LF refining, continuous casting protective casting；
（2）Heating of plate blank：Using straight dress heating of plate blank, steel slab is heated to 1190 DEG C, heating time 120min；
（3）Controlled rolling：Roughing is 5 passes, and workpiece thickness 55.8mm, outlet temperature is 1036 DEG C；7 frame of finish rolling rolls
Machine, F5-F7 rack reduction ratios are respectively F5：15.8%、F6：17.9%、F7：20.1%；Outlet temperature is 860 DEG C；
（4）Control section cooling：Refrigerating mode is concentrated using above and below leading portion 100%；
（5）It batches：570 DEG C of coiling temperature, batches offline stacking slow cooling.
The high-strength vehicle bridge of the present embodiment niobium vanadium complex intensifying is pearlite+ferrite with structure of steel, and medium pearlite accounts for 20%,
Microscopic structure composition is shown in Table 1；Mechanical performance index is shown in Table 2.
Embodiment 4
The high-strength vehicle bridge steel thickness 14mm of the present embodiment niobium vanadium complex intensifying, width 1600mm, the high-strength vehicle bridge of niobium vanadium complex intensifying
It is with steel chemical composition composition and its mass percentage：C：0.16%, Si：0.29%, Mn：1.43%, P：0.010%, S：
0.003%, V：0.048%, Ti：0.015%, Nb：0.043%, Als：0.026%, surplus is Fe and inevitable impurity element.
The high-strength vehicle bridge steel production method of the present embodiment niobium vanadium complex intensifying include vanadium extraction by converter blowing, converter smelting, LF refining,
Sheet billet continuous casting, heating of plate blank, high-pressure water descaling, controlled rolling, control section cooling, coiling process, specific process step are as follows
It is described：
（1）Smelting molten steel is formed according to set component, molten steel obtains slab through LF refining, continuous casting protective casting；
（2）Heating of plate blank：Using straight dress heating of plate blank, steel slab is heated to 1195 DEG C, heating time 130min；
（3）Controlled rolling：Roughing is 5 passes, and workpiece thickness 55.8mm, outlet temperature is 1035 DEG C；7 frame of finish rolling rolls
Machine, F5-F7 rack reduction ratios are respectively F5：15.8%、F6：17.9%、F7：20.1%；Outlet temperature is 865 DEG C；
（4）Control section cooling：Refrigerating mode is concentrated using above and below leading portion 100%；
（5）It batches：570 DEG C of coiling temperature, batches offline stacking slow cooling.
The high-strength vehicle bridge of the present embodiment niobium vanadium complex intensifying is pearlite+ferrite with structure of steel, and medium pearlite accounts for 25%,
Microscopic structure composition is shown in Table 1；Mechanical performance index is shown in Table 2.
Embodiment 5
The high-strength vehicle bridge steel thickness 10mm of the present embodiment niobium vanadium complex intensifying, width 1400mm, the high-strength vehicle bridge of niobium vanadium complex intensifying
It is with steel chemical composition composition and its mass percentage：C：0.16%, Si：0.28%, Mn：1.44%, P：0.011%, S：
0.005%, V：0.048%, Ti：0.015%, Nb：0.047%, Als：0.026%, surplus is Fe and inevitable impurity element.
The high-strength vehicle bridge steel production method of the present embodiment niobium vanadium complex intensifying include vanadium extraction by converter blowing, converter smelting, LF refining,
Sheet billet continuous casting, heating of plate blank, high-pressure water descaling, controlled rolling, control section cooling, coiling process, specific process step are as follows
It is described：
（1）Smelting molten steel is formed according to set component, molten steel obtains slab through LF refining, continuous casting protective casting；
（2）Heating of plate blank：Using straight dress heating of plate blank, steel slab is heated to 1200 DEG C, heating time 130min；
（3）Controlled rolling：Roughing is 5 passes, and workpiece thickness 55.8mm, outlet temperature is 1025 DEG C；7 frame of finish rolling rolls
Machine, F5-F7 rack reduction ratios are respectively F5：15.6%、F6：16.2%、F7：16.8%；Outlet temperature is 855 DEG C；
（4）Control section cooling：Refrigerating mode is concentrated using above and below leading portion 100%；
（5）It batches：560 DEG C of coiling temperature, batches offline stacking slow cooling.
The high-strength vehicle bridge of the present embodiment niobium vanadium complex intensifying is pearlite+ferrite with structure of steel, and medium pearlite accounts for 25%,
Microscopic structure composition is shown in Table 1；Mechanical performance index is shown in Table 2.
Embodiment 6
The high-strength vehicle bridge steel thickness 10mm of the present embodiment niobium vanadium complex intensifying, width 1250mm, the high-strength vehicle bridge of niobium vanadium complex intensifying
It is with steel chemical composition composition and its mass percentage：C：0.15%, Si：0.20%, Mn：1.40%, P：0.015%, S：
0.010%, V：0.040%, Ti：0.010%, Nb：0.040%, Als：0.045%, surplus is Fe and inevitable impurity element.
The high-strength vehicle bridge steel production method of the present embodiment niobium vanadium complex intensifying include vanadium extraction by converter blowing, converter smelting, LF refining,
Sheet billet continuous casting, heating of plate blank, high-pressure water descaling, controlled rolling, control section cooling, coiling process, specific process step are as follows
It is described：
（1）Smelting molten steel is formed according to set component, molten steel obtains slab through LF refining, continuous casting protective casting；
（2）Heating of plate blank：Using straight dress heating of plate blank, steel slab is heated to 1160 DEG C, heating time 160min；
（3）Controlled rolling：Roughing is 5 passes, and workpiece thickness 60mm, outlet temperature is 1020 DEG C；7 rolling mill of finish rolling,
F5-F7 rack reduction ratios are respectively F5：15.6%、F6：17.2%、F7：17.8%；Outlet temperature is 840 DEG C；
（4）Control section cooling：Refrigerating mode is concentrated using above and below leading portion 100%；
（5）It batches：560 DEG C of coiling temperature, batches offline stacking slow cooling.
The high-strength vehicle bridge of the present embodiment niobium vanadium complex intensifying is pearlite+ferrite with structure of steel, and medium pearlite accounts for 10%,
Microscopic structure composition is shown in Table 1；Mechanical performance index is shown in Table 2.
Embodiment 7
The high-strength vehicle bridge steel thickness 14mm of the present embodiment niobium vanadium complex intensifying, width 1600mm, the high-strength vehicle bridge of niobium vanadium complex intensifying
It is with steel chemical composition composition and its mass percentage：C：0.20%, Si：0.40%, Mn：1.60%, P：0.010%, S：
0.007%, V：0.050%, Ti：0.012%, Nb：0.045%, Als：0.030%, surplus is Fe and inevitable impurity element.
The high-strength vehicle bridge steel production method of the present embodiment niobium vanadium complex intensifying include vanadium extraction by converter blowing, converter smelting, LF refining,
Sheet billet continuous casting, heating of plate blank, high-pressure water descaling, controlled rolling, control section cooling, coiling process, specific process step are as follows
It is described：
（1）Smelting molten steel is formed according to set component, molten steel obtains slab through LF refining, continuous casting protective casting；
（2）Heating of plate blank：Using straight dress heating of plate blank, steel slab is heated to 1160 DEG C, heating time 150min；
（3）Controlled rolling：Roughing is 5 passes, and workpiece thickness 55mm, outlet temperature is 1060 DEG C；7 rolling mill of finish rolling,
F5-F7 rack reduction ratios are respectively F5：15.1%、F6：16.5%、F7：16.9%；Outlet temperature is 880 DEG C；
（4）Control section cooling：Refrigerating mode is concentrated using above and below leading portion 100%；
（5）It batches：600 DEG C of coiling temperature, batches offline stacking slow cooling.
The high-strength vehicle bridge of the present embodiment niobium vanadium complex intensifying is pearlite+ferrite with structure of steel, and medium pearlite accounts for 30%,
Microscopic structure composition is shown in Table 1；Mechanical performance index is shown in Table 2.
The 1 high-strength vehicle bridge steel microscopic structure of embodiment 1-7 niobium vanadium complex intensifyings of table
2 embodiment 1-7 niobium vanadium complex intensifying high-strength vehicle bridge Steel Properties detection datas of table
The thickness 10-14mm produced using the method for the present invention, the axle housing steel production and sales of width 1250-1600mm specifications are reached
2000 tons, the property indices such as mechanical performance, low temperature impact properties, hot formability, template are satisfied by user's requirement.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that：Still can the present invention be modified or be waited
With replacing, without departing from the spirit or scope of the invention, or any substitutions, the power in the present invention should all be covered
In sharp claimed range.
Claims (10)
1. a kind of high-strength vehicle bridge steel of niobium vanadium complex intensifying, which is characterized in that the vehicle bridge is formed with steel chemical composition and its matter
Measuring percentage composition is：C：0.15~0.20%, Si：0.20~0.40%, Mn：1.40~1.60%, P≤0.015%, S≤0.010%,
V >=0.04%, Nb >=0.04%, Ti >=0.01%, Als≤0.045%, surplus are Fe and inevitable impurity element.
A kind of 2. high-strength vehicle bridge steel of niobium vanadium complex intensifying according to claim 1, which is characterized in that the vehicle bridge steel
Thickness 10-14mm, width 1250-1600mm.
A kind of 3. high-strength vehicle bridge steel of niobium vanadium complex intensifying according to claim 1, which is characterized in that the vehicle bridge steel
Performance indicator：Tensile strength >=670MPa, elongation percentage >=18%, yield strength >=500MPa, -20 DEG C of ballistic work >=47J of low temperature.
A kind of 4. high-strength vehicle bridge steel of niobium vanadium complex intensifying according to claim 1, which is characterized in that the vehicle bridge steel
Pearlite+ferrite is organized as, medium pearlite accounts for 10-30%.
5. a kind of production method of the high-strength vehicle bridge steel of niobium vanadium complex intensifying described in based on claim 1-4 any one,
It is characterized in that, the production method includes vanadium extraction by converter blowing, converter smelting, LF refining, sheet billet continuous casting, heating of plate blank, high pressure water and removes
Squama, controlled rolling, control section cooling, coiling process；The controlled rolling process is rolled including roughing rolling, Coil Box, finish rolling
Technique processed.
A kind of 6. production method of the high-strength vehicle bridge steel of niobium vanadium complex intensifying according to claim 5, which is characterized in that institute
Controlled rolling process is stated, roughing is 5 passes, and workpiece thickness >=55mm, outlet temperature is 1020~1060 DEG C.
A kind of 7. production method of the high-strength vehicle bridge steel of niobium vanadium complex intensifying according to claim 5, which is characterized in that institute
Controlled rolling process, 7 rolling mill of finish rolling are stated, F5-F7 racks total reduction is more than 30%, and outlet temperature is 840~880 DEG C.
8. a kind of production method of the high-strength vehicle bridge steel of niobium vanadium complex intensifying according to claim 5-7 any one,
It is characterized in that, the control laminar flow cooling process concentrates refrigerating mode using above and below leading portion 100%.
9. a kind of production method of the high-strength vehicle bridge steel of niobium vanadium complex intensifying according to claim 5-7 any one,
It is characterized in that, the heating of plate blank process, using straight dress heating of plate blank, steel slab is heated to 1160~1200 DEG C, during heating
Between control in≤160min.
10. a kind of production method of the high-strength vehicle bridge steel of niobium vanadium complex intensifying according to claim 5-7 any one,
It is characterized in that, the coiling process, 560-600 DEG C of coiling temperature batches offline stacking slow cooling.
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| CN111074165A (en) * | 2019-12-31 | 2020-04-28 | 河钢股份有限公司承德分公司 | 700 MPa-grade high-strength hot-rolled pickled automobile steel and production method thereof |
| CN112126847A (en) * | 2020-07-31 | 2020-12-25 | 天津钢铁集团有限公司 | Large-thickness Q420FTE high-strength steel plate for wind tower structure and production method thereof |
| CN113862565A (en) * | 2021-09-17 | 2021-12-31 | 北京首钢股份有限公司 | High-fatigue high-strength steel for axle housing of axle and preparation method of steel |
| CN113957347A (en) * | 2021-10-25 | 2022-01-21 | 攀钢集团攀枝花钢铁研究院有限公司 | 590 MPa-grade thick-specification axle housing steel for cold stamping and preparation method thereof |
| CN113981320A (en) * | 2021-10-28 | 2022-01-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Axle housing steel for 510MPa grade cold stamping and preparation method thereof |
| CN116288019A (en) * | 2022-12-19 | 2023-06-23 | 本钢板材股份有限公司 | Steel with yield strength of more than or equal to 500MPa for automobile axle housing and manufacturing method thereof |
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| CN113862565A (en) * | 2021-09-17 | 2021-12-31 | 北京首钢股份有限公司 | High-fatigue high-strength steel for axle housing of axle and preparation method of steel |
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| CN113981320A (en) * | 2021-10-28 | 2022-01-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Axle housing steel for 510MPa grade cold stamping and preparation method thereof |
| CN116288019A (en) * | 2022-12-19 | 2023-06-23 | 本钢板材股份有限公司 | Steel with yield strength of more than or equal to 500MPa for automobile axle housing and manufacturing method thereof |
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Application publication date: 20180629 |