CN109234620B - High magnetic flux density magnetic levitation track F fashioned iron and its production method - Google Patents
High magnetic flux density magnetic levitation track F fashioned iron and its production method Download PDFInfo
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- CN109234620B CN109234620B CN201811092935.1A CN201811092935A CN109234620B CN 109234620 B CN109234620 B CN 109234620B CN 201811092935 A CN201811092935 A CN 201811092935A CN 109234620 B CN109234620 B CN 109234620B
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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
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- 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
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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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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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Analytical Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of high magnetic flux density magnetic levitation track F fashioned iron and its production methods, including following components and its weight percent content: C:0.04~0.07%, Si:0.08~0.20%, Mn:0.5~0.8%, P≤0.015%, S≤0.015%, Nb:0.015~0.030%, Als:0.03~0.05%, remaining is Fe and impurity element.The present invention is by controlling inclusion particle number and size in steel grades design and steelmaking process, high temperature is equipped with simultaneously to roll fastly, reach alloying element to be solid-solution in steel and make crystal grain fast growth, obtain the magnetic levitation track F fashioned iron with high magnetic flux density and good mechanical performance, the magnetic flux density of F fashioned iron greatly improved in the present invention, and the magnetic flux density than existing F fashioned iron improves 15% or more.
Description
Technical field
The present invention relates to metallurgical technologies, in particular to a kind of high magnetic flux density magnetic levitation track F fashioned iron and its production method.
Background technique
Magnetic-levitation train is to realize to suspend generation gravitation between ferromagnetism track when being powered by the suspension magnet on car body
And guiding.The traction electric machine of train is short stator linear motor, electric motor primary i.e. stator, is mounted on car body, is led
The conversion and control for drawing power are onboard realized.On car body install linear motor stator, immediately below track on pacify
Equipped with tablet, a mobile magnetic field is generated after stator passes through three-phase current, this magnetic field induces electricity on tablet
Stream and Induced magnetic field, two magnetic field interactions just produce thrust.F type guide rail is a kind of receiving maglev vehicle suspending power, leads
The basic component of Xiang Li and tractive force are made of F fashioned iron and tablet.Current F fashioned iron is primarily present following problems: 1) magnetic flux
Density is low, and each position magnetic flux density difference is larger, and in changes of magnetic field, eddy current loss is larger；2) processability is to be improved；
3) production process control is complicated, high production cost.
Chinese Patent Application No. is the patent document of CN201410380062.X, discloses a kind of medium-and low-speed maglev train use
F shaped steel rail and suspension and propulsion system structure, wherein low-speed maglev train track F shaped steel rail, including F fashioned iron, aluminium tablet
And fastening bolt, the lower surface of the F fashioned iron are respectively equipped with outer magnetic pole leg and internal magnetic pole leg, the F fashioned iron further includes induction iron
Core；F fashioned iron cross section is F shape, and upper surface is a plane；The aluminium tablet is set to above inductive iron core, with induction
Iron core is mounted on the upper surface of F fashioned iron using same group of fastening bolt；The medium-and low-speed maglev train rail of the invention suspend and
Propulsion system structure further includes the U-shaped magnet of aerotrain including above-mentioned F shaped steel rail；The invention can reduce in low speed magnetic
The operation energy consumption of floating train, improves efficiency of energy utilization, energy-saving and emission-reduction.The shortcomings that invention first is that F shaped steel rail be not once at
Type, later period need to process installation, second is that each position magnetic flux density difference is larger, in changes of magnetic field, eddy current loss is larger.
In addition, Chinese patent application CN01126937 discloses a kind of high performance soft steel magnet for magnetic suspension train, ingredient
For C:0.010~0.070%, Si:1.0~2.0%, Mn:0.30~0.80%, P :≤0.020%, S :≤0.010%, AlT:
0.02~0.09%, Cr:0.6~1.0%, Cu:0.2~0.6%, Ti≤0.008%, N :≤0.01%, Ni :≤0.8%,
Ca :≤100ppm, remaining is iron and is inevitably mingled with.The control of steel plate normalizing temperature is at 930~970 DEG C, cooling velocity control
System is between 0.5~2/s, when steel billet temperature≤650 DEG C, steel plate natural air cooling to room temperature.Sheet metal one produced by the patent
It is the lamination steel for high-speed maglev train stator winding, complicated component, production process control is complicated, high production cost, second is that
It is processed into F type guide rail, is welded and is machined, production efficiency is low, it is difficult to realize mass production.
Summary of the invention
Present invention aim to provide a kind of high magnetic flux density magnetic levitation track F fashioned iron and its production method, the F type
Steel magnetic flux density is high, and mechanical property and processability are excellent.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of high magnetic flux density magnetic levitation track F fashioned iron,
Including following components and its weight percent content: C:0.04~0.07%, Si:0.08~0.20%, Mn:0.5~0.8%, P
≤ 0.015%, S≤0.015%, Nb:0.015~0.030%, Als:0.03~0.05%, remaining is Fe and impurity element.
Further, including following components and its weight percent content: C:0.045~0.057%, Si:0.095~
0.11%, Mn:0.57~0.62%, P:0.005~0.008%, S:0.003~0.005%, Nb:0.026~0.028%,
Als:0.0376~0.0427%, remaining is Fe and impurity element.
A kind of production method of high magnetic flux density magnetic levitation track F fashioned iron, including desulfurizing iron, converter smelting, LF furnace essence
Refining, RH application of vacuum, continuous casting, heating, roughing and finish rolling step, it is characterised in that: in the LF furnace refinement step, basicity of slag
Control is that 1.8~2.2, LF furnace handles time >=30min；In the heating stepses, control soaking section temperature is 1280~1300
DEG C, heating time > 180min；In the roughing step, its start rolling temperature >=1100 DEG C is controlled；In the finish rolling step, control
Its finishing temperature >=950 DEG C.
Further, it in the continuous casting step, using big tank long nozzle and crystallizer submersed nozzle molding casting, immerses
Depth is 75~85mm；Baogang's coolant-temperature gage is 10~20 DEG C more than its steel grade liquidus temperature line in control；Controlling Casting speed is
0.6~0.8m/min.
Further, in the converter smelting, control tapping temperature is 1650~1680 DEG C.
Further, in the RH application of vacuum step, using deep vacuum degree, pressure≤67Pa processing time >=
10min。
Further, in the roughing step, control start rolling temperature is 1156~1162 DEG C.
Further, in the finish rolling step, control finishing temperature is 959~971 DEG C.
Further, in the heating stepses, control soaking section temperature be 1283~1297 DEG C, heating time be 197~
213min。
Further, in the LF furnace refinement step, basicity of slag control is 1.85~1.97.
Compared with prior art, the invention has the following advantages that
First, the present invention by steel grades design and steelmaking process in control inclusion particle number and size, simultaneously
It is equipped with high temperature to roll fastly, reaches alloying element and be solid-solution in steel and make crystal grain fast growth, obtain with high magnetic flux density
And the magnetic flux density of F fashioned iron greatly improved in the magnetic levitation track of good mechanical performance F fashioned iron, the present invention, than existing F fashioned iron
Magnetic flux density improve 15% or more.
Second, the present invention controls basicity of slag 1.8~2.2, by low alkalinity and it is vacuum-treated control field trash
Numbers of particles and size；Steel processability of the present invention is good, and production process control is simple, reduces production cost.
Third, due to the particularity of F rolling of sectional iron, especially two leg points of F fashioned iron, cooling very fast, gold in the operation of rolling
Belong to poor fluidity, in order to guarantee metal fluidity, reduce mill load, guarantee that each angle is full of, control soaking temperature 1280 with
On, finishing temperature is not less than 950 DEG C, to guarantee leg tip temperature.Higher finishing temperature one can be completed in austenitic area simultaneously
Rolling, does not occur perfect recrystallization, transgranular there are recrystallization textures, are conducive to the raising of magnetic flux density, two can be in favor of crystal grain
Grow up, crystal boundary reduce, crystal boundary to the unique inhibition of neticdomain wall reduce, the process that crystal grain is grown up be also in crystal grain impurity with crystalline substance
Boundary's migration, and rest on crystal boundary, single crystal grain is purified, to reduce crystal grain to the obstruction of domain wall displacement, improves magnetic flux
Density.The present invention obtains unexpected effect to the raising degree of F fashioned iron magnetic flux density.
Detailed description of the invention
Fig. 1 is the metallurgical structure picture of 1 gained high magnetic flux density magnetic levitation track F fashioned iron of embodiment.
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments, convenient for more clearly understanding this
Invention, but they limiting the invention.
Embodiment 1
A kind of high magnetic flux density magnetic levitation track F fashioned iron, chemical component is by weight are as follows: C:0.045%, Si:0.11%,
Mn:0.58%, P:0.007%, S:0.005%, Nb:0.027%, Als:0.0376%, remaining is Fe and impurity element.It is given birth to
Production process is as follows:
1) conventional to carry out desulfurizing iron and converter smelting, and tapping temperature is controlled at 1667 DEG C；
2) active lime etc. is added, makes white slag, basicity of slag control handles time 42min in 1.93, LF furnace；
3) RH application of vacuum: using deep vacuum degree, the processing time of pressure 59Pa is 12min；
4) continuous casting is carried out, using big tank long nozzle and crystallizer submersed nozzle molding casting, immersion depth is in 79mm；In
Baogang's coolant-temperature gage is according to 13 DEG C of control more than its steel grade liquidus temperature line；Casting speed is controlled in 0.8m/min；
5) nature stacking is carried out to slab to be cooled to room temperature, forbid to water to casting billet surface；
6) to heating steel billet, soaking section temperature is controlled are as follows: 1288 DEG C, heating time 213min, and must not control and overheat, mistake
It burns；
7) roughing is carried out, and controls its start rolling temperature at 1162 DEG C；
8) finish rolling is carried out, 971 DEG C of its finishing temperature is controlled；
9) natural air cooling is stand-by to room temperature, and forbids to the steel water drenching after finish to gauge.
Embodiment 2
A kind of high magnetic flux density magnetic levitation track F fashioned iron, chemical component is by weight are as follows: C:0.047%, Si:
0.095%, Mn:0.62%, P:0.008%, S:0.003%, Nb:0.026%, Als:0.0412%, remaining is Fe and impurity
Element.Its production process is as follows:
1) conventional to carry out desulfurizing iron and converter smelting, and tapping temperature is controlled at 1671 DEG C；
2) active lime etc. is added, makes white slag, basicity of slag control handles time 37min in 1.85, LF furnace；
3) RH application of vacuum: using deep vacuum degree, the processing time 13min of pressure 63Pa；
4) continuous casting is carried out, using big tank long nozzle and crystallizer submersed nozzle molding casting, immersion depth is in 81mm；In
Baogang's coolant-temperature gage is according to 18 DEG C of control more than its steel grade liquidus temperature line；Casting speed is controlled in 0.6m/min；
5) nature stacking is carried out to slab to be cooled to room temperature, forbid to water to casting billet surface；
6) to heating steel billet, soaking section temperature is controlled are as follows: 1283 DEG C, heating time 200min, and must not control and overheat, mistake
It burns；
7) roughing is carried out, and controls its start rolling temperature at 1156 DEG C；
8) finish rolling is carried out, 959 DEG C of its finishing temperature is controlled；
9) natural air cooling is stand-by to room temperature, and forbids to the steel water drenching after finish to gauge.
Embodiment 3
A kind of high magnetic flux density magnetic levitation track F fashioned iron, chemical component is by weight are as follows: C:0.057%, Si:
0.105%, Mn:0.57%, P:0.005%, S≤0.005%, Nb:0.028%, Als:0.0427%, remaining is Fe and impurity
Element.Its production process is as follows:
1) conventional to carry out desulfurizing iron and converter smelting, and tapping temperature is controlled at 1655 DEG C；
2) active lime etc. is added, makes white slag, basicity of slag control handles time 57min in 1.97, LF furnace；
3) RH application of vacuum: using deep vacuum degree, the processing time 15min of pressure 61Pa；
4) continuous casting is carried out, using big tank long nozzle and crystallizer submersed nozzle molding casting, immersion depth is in 77mm；In
Baogang's coolant-temperature gage is according to 13 DEG C of control more than its steel grade liquidus temperature line；Casting speed is controlled in 0.8m/min；
5) nature stacking is carried out to slab to be cooled to room temperature, forbid to water to casting billet surface；
6) to heating steel billet, soaking section temperature is controlled are as follows: 1297 DEG C, heating time 197min, and must not control and overheat, mistake
It burns；
7) roughing is carried out, and controls its start rolling temperature at 1157 DEG C；
8) finish rolling is carried out, 967 DEG C of its finishing temperature is controlled；
9) natural air cooling is stand-by to room temperature, and forbids to the steel water drenching after finish to gauge.
Two comparison steel grades by the F fashioned iron of Examples 1 to 3 production and in the market, compared steel 1, ingredient 0.19%C,
0.57%Mn, 0.217%Si, 0.023%P, 0.003%S, 0.029%Cr, 0.012%Ni；Compared steel 2, ingredient 0.15%
C, 0.56%Mn, 0.265%Si, 0.010%P, 0.003%S, 0.03%Cr, 0.059%V, 0.014%Ni, 0.032%Nb,
0.04%AlS.Mechanical property is carried out to above-mentioned five kinds of component steels and magnetic flux density is examined.
Table 1
From table 1 it follows that the present invention at least improves (1.68-1.45)/1.45=than the magnetic induction intensity of comparative example
15.8%, and steel mechanical property of the present invention is excellent.In addition, impurity with crystal boundary migration and stops in crystal grain as can be seen from Figure 1
On crystal boundary, single crystal grain is purified, and grain structure structure is uniform.
Claims (10)
1. a kind of high magnetic flux density magnetic levitation track F fashioned iron, it is characterised in that: contain including following components and its weight percent
Amount: C:0.04~0.07%, Si:0.08~0.20%, Mn:0.5~0.8%, P≤0.015%, S≤0.015%, Nb:
0.015~0.030%, Als:0.03~0.05%, remaining is Fe and impurity element；
The production method of the high magnetic flux density magnetic levitation track F fashioned iron, including the refining of desulfurizing iron, converter smelting, LF furnace, RH
Vacuum processing, continuous casting, heating, roughing and finish rolling step, in the LF furnace refinement step, basicity of slag control is 1.8~2.2,
LF furnace handles time >=30min；In the heating stepses, control soaking section temperature is 1280~1300 DEG C, heating time >
180min；In the roughing step, its start rolling temperature >=1100 DEG C is controlled；In the finish rolling step, control its finishing temperature >=
950℃。
2. high magnetic flux density magnetic levitation track F fashioned iron according to claim 1, it is characterised in that: including following components and its
Weight percent content: C:0.045~0.057%, Si:0.095~0.11%, Mn:0.57~0.62%, P:0.005~
0.008%, S:0.003~0.005%, Nb:0.026~0.028%, Als:0.0376~0.0427%, remaining is Fe and miscellaneous
Prime element.
3. a kind of production method of high magnetic flux density magnetic levitation track F fashioned iron as claimed in claim 1 or 2, including desulfurizing iron,
Converter smelting, the refining of LF furnace, RH application of vacuum, continuous casting, heating, roughing and finish rolling step, it is characterised in that: the LF furnace refining
In step, basicity of slag control is that 1.8~2.2, LF furnace handles time >=30min；In the heating stepses, soaking zone temperature is controlled
Degree is 1280~1300 DEG C, heating time > 180min；In the roughing step, its start rolling temperature >=1100 DEG C is controlled；It is described
In finish rolling step, its finishing temperature >=950 DEG C is controlled.
4. the production method of high magnetic flux density magnetic levitation track F fashioned iron according to claim 3, it is characterised in that: the company
It casts in step, using big tank long nozzle and crystallizer submersed nozzle molding casting, immersion depth is 75~85mm；It is wrapped in control
Liquid steel temperature is 10~20 DEG C more than its steel grade liquidus temperature line；Control Casting speed is 0.6~0.8m/min.
5. according to the production method of the high magnetic flux density magnetic levitation track F fashioned iron of claim 3 or 4, it is characterised in that: described
In converter smelting, control tapping temperature is 1650~1680 DEG C.
6. according to the production method of the high magnetic flux density magnetic levitation track F fashioned iron of claim 3 or 4, it is characterised in that: described
In RH application of vacuum step, using deep vacuum degree, pressure≤67Pa processing time >=10min.
7. according to the production method of the high magnetic flux density magnetic levitation track F fashioned iron of claim 3 or 4, it is characterised in that: described
In roughing step, control start rolling temperature is 1156~1162 DEG C.
8. according to the production method of the high magnetic flux density magnetic levitation track F fashioned iron of claim 3 or 4, it is characterised in that: described
In finish rolling step, control finishing temperature is 959~971 DEG C.
9. according to the production method of the high magnetic flux density magnetic levitation track F fashioned iron of claim 3 or 4, it is characterised in that: described
In heating stepses, control soaking section temperature is 1283~1297 DEG C, and heating time is 197~213min.
10. according to the production method of the high magnetic flux density magnetic levitation track F fashioned iron of claim 3 or 4, it is characterised in that: institute
It states in LF furnace refinement step, basicity of slag control is 1.85~1.97.
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| CN113088814A (en) * | 2021-03-25 | 2021-07-09 | 武汉钢铁有限公司 | Economical low-temperature-resistant F-shaped steel and production method thereof |
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