Soft magnetic structural steel resisting salt fog corrosion and its making process
A manufacturing method and technology for structural steel, applied in the direction of metal rolling, etc., can solve problems such as insufficient resistance to salt spray corrosion
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[0059] Example: The manufacturing process of the soft magnetic structural steel plate of the present invention is as follows: laboratory vacuum induction furnace smelting, after the molten steel composition reaches the target composition, the casting starts immediately, and the casting temperature of the molten steel is 15252-1550°C. Slab soaking time in the heating furnace = plate thickness (mm)×(0.5~1.0) min / mm, soaking temperature is 1050℃~1100℃, hot rolling adopts 9-pass rolling process, and the cumulative reduction ratio is 70 %~90%, the final rolling temperature is 800℃~850℃, the transfer time between the end of final rolling and the start of accelerated cooling is 15s~30s, the surface temperature of the steel ingot when the accelerated cooling starts is above 800℃, and the accelerated cooling rate is 10℃ / s~30℃ / s, stop cooling temperature is 500℃~600℃, then slowly cool to 300℃ (slow cooling rate≤1℃ / min), then naturally to room temperature.
[0060] The five comparative examp...
Example Embodiment
[0062] The metallographic structure of Example 3 of the invention C is shown in the attached drawings
[0063]
[0064] ◆Welding heat simulation parameters: single cycle, simulated peak temperature of 1350℃, t 8 / 5 = 50 seconds.
[0065]
[0066] The maglev rapid train system is a fast, safe, efficient and environmentally friendly means of transportation. At present, the fastest maglev train in the world has reached a speed of more than 560 km / h. As a fast, safe, efficient, and environmentally friendly means of transportation, the maglev rapid train system is becoming more and more popular. The construction of the maglev rapid train system will be set off at home and abroad; and as a side guide of the key component of the maglev rapid train system track beam Soft magnetic structural steel plates, especially high-performance soft magnetic structural steel plates used in coastal areas, will have broad market prospects.
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