F type rail used for reducing frictional losses of magnetic-levitation train and preparing method thereof
A friction loss, maglev train technology, applied in tracks, buildings, roads, etc., can solve the problems of increasing the maintenance cost of maglev tracks, thinning of the outer legs of the F-rail, hidden dangers of vehicle safety, etc., so as to improve operation safety and reduce maintenance costs. , The effect of improving performance and service life
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[0035] The invention discloses a method for preparing the F-shaped rail for reducing friction loss of a maglev train, which includes the following processes:
[0036] Hot metal desulfurization: using magnesium powder desulfurization process;
[0037] Converter smelting: adopt top and bottom combined blowing process;
[0038] LF refining outside the furnace: the slag basicity is controlled in the range of 1.6 to 2.0;
[0039] Vacuum treatment: the vacuum treatment time is not less than 20min;
[0040] Continuous casting: During the continuous casting process, the temperature of the tundish is controlled at the liquidus 18~24℃, and the pulling speed is 0.6~1.0m / min. The continuous casting process should be carried out under the protection of the whole process to prevent contact with air. The billet should be slowly cooled;
[0041] Billet heating: use walking beam heating furnace to heat the billet, and conduct heat preservation treatment, the heating temperature is 1200~1260℃, and the he...
Embodiment 1
[0048] This embodiment discloses a method for preparing the above-mentioned F-shaped rail for reducing the friction loss of a maglev train, wherein each chemical component is calculated by mass percentage, including: C: 0.03%, Si: 0.25%, Mn: 1.5% , P: 0.002%, S: 0.002%, Cr: 0.10%, Ni: 0.10%, Nb: 0.02%, B: 0.002%; the balance is Fe and unavoidable impurities.
[0049] The specific accelerated cooling and heat treatment process for the F-shaped steel outer leg is shown in Table 1; the obtained length is 12.5 meters and the specification is F379×101mm.
Embodiment 2
[0051] This embodiment discloses a method for preparing the above-mentioned F-shaped rail for reducing the friction loss of a maglev train, wherein each chemical component is calculated by mass percentage, including: C: 0.09%, Si: 0.40%, and Mn: 2.0% , P: 0.002%, S: 0.002%, Cr: 0.30%, Ni: 0.25%, Nb: 0.06%, B: 0.006%; the balance is Fe and unavoidable impurities.
[0052] The specific accelerated cooling heat treatment process for the F-shaped steel outer leg is shown in Table 1.
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