F-shaped steel for magnetic levitation rails with high magnetic flux density and production method thereof

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 creates thrust. The F...

Examples

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 type; the casting speed is contro...

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 immersed 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 0.6m...

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; the casting speed is co...

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 creates thrust. The F...

Examples

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 type; the casting speed is contro...

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 immersed 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 0.6m...

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; the casting speed is co...

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