Why Modern Trains are Silent: The Secret of 500-Foot Seamless Rails
How are the world's longest railroad rails made, and why don't we hear the "clickety-clack" sound on high-speed trains anymore? In this episode of Made on Earth, we go inside a massive steel mill to witness the incredible manufacturing process of 480-foot seamless rails.
By 2025, China's high-speed rail network has reached 28,000 miles, and it all starts here, in the heat of a 3,000-degree furnace. We’ll show you how a 15,000lb steel billet is transformed into a glowing "metal snake" through a high-precision rolling mill at speeds of 36 feet per second.
📌 Timestamps:
00:00 — Introduction: The world of silent high-speed trains
01:15 — The Secret Sauce: Cooking rail steel at 3,000°F
02:40 — From Billets to Serpents: The continuous casting process
04:05 — Drawing the Soul: Rolling mill and thousands of tons of force
05:50 — Head Hardening: Creating the pearlite structure
07:15 — The 500-foot Cooling Bed and Ultrasonic testing
08:30 — Logistical Circus: How to transport "The Metal Snake"
10:05 — Thermite Welding and Thermal Expansion secrets
11:40 — Conclusion: Steel highways that stitch continents
#howitsmade #railway #steelproduction #engineering #highspeedrail #manufacturing #industry #china #metallurgy #madeonearth
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