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F-shaped steel for high magnetic flux density maglev track and production method thereof

A technology of high magnetic flux density and magnetic levitation track, applied in the field of metallurgy, can solve the problems of complex composition, low magnetic flux density and high production cost, achieve the effects of simple production process control, increase magnetic flux density and reduce production cost

Active Publication Date: 2019-11-05
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current F-shaped steel mainly has the following problems: 1) The magnetic flux density is low, and the magnetic flux density at each position varies greatly, and the eddy current loss is large when the magnetic field changes; 2) The forming performance needs to be improved; 3) The production process control is complicated, and the production high cost
The disadvantage of this invention is that the F-shaped rail is not formed at one time, and needs to be processed and installed later, and the second is that the magnetic flux density at each position varies greatly, and the eddy current loss is relatively large when the magnetic field changes
The thin steel plate produced by this patent is the lamination steel used for the stator winding of high-speed maglev trains, which has complex composition, complicated production process control, and high production cost. , it is difficult to achieve mass production

Method used

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  • F-shaped steel for high magnetic flux density maglev track and production method thereof
  • F-shaped steel for high magnetic flux density maglev track and production method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An F-shaped steel for high magnetic flux density maglev track, the chemical composition is: C: 0.045%, Si: 0.11%, Mn: 0.58%, P: 0.007%, S: 0.005%, Nb: 0.027%, Als : 0.0376%, the rest is Fe and impurity elements. Its production process is as follows:

[0024] 1) Desulfurization of molten iron and converter smelting are carried out routinely, and the tapping temperature is controlled at 1667°C;

[0025] 2) Add active lime, etc. to make white slag, the slag basicity is controlled at 1.93, and the treatment time of LF furnace is 42 minutes;

[0026] 3) RH vacuum treatment: using deep vacuum, the treatment time is 12min at a pressure of 59Pa;

[0027] 4) For continuous casting, the long nozzle of the large tank and the submerged nozzle of the crystallizer are used to protect the pouring, and the immersion depth is 79mm; the temperature of the molten steel in the tundish is controlled at 13°C above the liquidus temperature line of the steel; the casting speed is controlled ...

Embodiment 2

[0034] An F-shaped steel for high magnetic flux density maglev track, the chemical composition is: C: 0.047%, Si: 0.095%, Mn: 0.62%, P: 0.008%, S: 0.003%, Nb: 0.026%, Als : 0.0412%, the rest is Fe and impurity elements. Its production process is as follows:

[0035] 1) Conduct molten iron desulfurization and converter smelting routinely, and control the tapping temperature at 1671°C;

[0036] 2) Add active lime, etc. to make white slag, the slag basicity is controlled at 1.85, and the treatment time of LF furnace is 37 minutes;

[0037] 3) RH vacuum treatment: using deep vacuum degree, the treatment time is 13min at a pressure of 63Pa;

[0038] 4) For continuous casting, the long nozzle of the large tank and the submerged nozzle of the crystallizer are used to protect the pouring, and the immersion depth is 81mm; the temperature of the molten steel in the tundish is controlled at 18°C ​​above the liquidus temperature line of the steel; the casting speed is controlled at 0.6...

Embodiment 3

[0045] An F-shaped steel for high magnetic flux density maglev track, the chemical composition is: C: 0.057%, Si: 0.105%, Mn: 0.57%, P: 0.005%, S≤0.005%, Nb: 0.028%, Als : 0.0427%, the rest is Fe and impurity elements. Its production process is as follows:

[0046] 1) Desulfurization of molten iron and converter smelting are carried out routinely, and the tapping temperature is controlled at 1655°C;

[0047] 2) Add active lime, etc. to make white slag, the slag alkalinity is controlled at 1.97, and the treatment time of LF furnace is 57 minutes;

[0048] 3) RH vacuum treatment: using deep vacuum degree, the treatment time is 15min at a pressure of 61Pa;

[0049] 4) For continuous casting, the long nozzle of the large tank and the submerged nozzle of the crystallizer are used to protect the pouring, and the immersion depth is 77mm; the temperature of the molten steel in the tundish is controlled at 13°C above the liquidus temperature line of the steel type; the casting speed ...

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Abstract

The invention discloses F-shaped steel for magnetic levitation rails with high magnetic flux density and a production method thereof. The F-shaped steel contains the following components by weight percent: 0.04-0.07% of C, 0.08-0.20% of Si, 0.5-0.8% of Mn, less than or equal to 0.015% of P, less than or equal to 0.015% of S, 0.015-0.030% of Nb, 0.03-0.05% of Als and the balance of Fe and impurityelements. According to the invention, the F-shaped steel for magnetic levitation rails with high magnetic flux density and excellent mechanical properties is acquired in the manner of designing steelcomponents, controlling quantity and size of impurity grains in the steel-making process and supplementing by high-temperature quick rolling so as to solidly dissolve alloying elements in steel and accelerate quick growth of crystal grains. According to the invention, the magnetic flux density of F-shaped steel is greatly increased and is 15% higher than that of present F-shaped steel.

Description

technical field [0001] The invention relates to metallurgical technology, in particular to an F-shaped steel for a high magnetic flux density maglev track and a production method thereof. Background technique [0002] The maglev train achieves levitation and guidance through the gravitational force generated between the levitation magnet on the car body and the ferromagnetic track when it is energized. The traction motor of the train is a short-stator linear motor. The primary part of the motor is the stator, which is installed on the car body. The conversion and control of traction power are realized on the car. The stator of the linear motor is installed on the car body, and an induction plate is installed on the track directly below it. When the stator passes a three-phase current, a moving magnetic field is generated. This magnetic field induces a current and an induced magnetic field on the induction plate. The two magnetic fields The interaction produces thrust. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/12C22C38/06C21D8/00C21C7/00C21C7/10
CPCC21C7/0087C21C7/10C21D8/005C22C38/02C22C38/04C22C38/06C22C38/12
Inventor 朱敏徐志东叶佳林周剑华费俊杰赵国知郑建国王瑞敏
Owner 武汉钢铁有限公司
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