World’s first application of new in-line rail hardening goes commercial at Baotou

Weltweit erste Inline-Schienenkopfhärtung beginnt kommerzielle Produktion bei Baotou / World's first application of new in-line rail hardening goes commercial at BaotouSiemens Metals Technologies has received notice from Baotou Iron & Steel (Group) Co. Ltd. that the in-line “Injector Dual-phase Rail Hardening” (Idrha+) achieved the expected performances for the rail R60 U75V gr.340 according to TB/T2344-2012 norm and has therefore entered the regular commercial production. The system, contracted to Siemens in December 2012, is capable to improve the rail resistance to both wear and rolling contact fatigue, and was designed by Siemens Metals Technologies and Centro Sviluppo Materiali S.p.A. (RINA-CSM).
The grade U75V is one of the most widely produced rails for high-speed application. After head-hardening treatment with Idrha+ process, all the obtained mechanical and metallurgical characteristics of the rails exceed the values required by the applicable standards
With a rail production capacity up to 1.36 million tons (record reached in 2009), Baotou is the largest rail manufacturer in the world. The first in-line Idrha+ system is installed in the rail rolling mill nr. 2, which has a yearly capacity of 400,000 metric tons and produces various sizes and grades of rails for domestic and export markets, according to the main international standards.

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