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Weldable CMS Crossing
Presently weldable CMS crossings are not produced in India. At present CMS Crossings are connected by fish-plated machined joints, as the welding technology of Cast Manganese Steel crossing with normal rails of carbon steel is not available in our country. Fish plated machined constitutes the weak link in the track which leads to less safety and comfort in the track. It also attracts heavy wear and tear also of CMS Crossing. Hence, Railways needs to undertake increased maintenance and has additional down-time of the track.
VAE GmbH, Austria is one of the few that has developed this special welding technology and is in course of transferring this technology to VAE VKN in India.
Thus, we can offer this technology to our Indian customers and will serve them through not only by increasing the life of these costly assets but also providing much more safety in the track which will subsequently lead to considerable reduction in both tangible and intangible cost to Railways.
It is recommended to use the EDH-process especially also for weldable CMS which will further improve the lifespan and reduce the life-cycle costs
VAE GmbH, Austria is one of the few that has developed this special welding technology and is in course of transferring this technology to VAE VKN in India.
Thus, we can offer this technology to our Indian customers and will serve them through not only by increasing the life of these costly assets but also providing much more safety in the track which will subsequently lead to considerable reduction in both tangible and intangible cost to Railways.
It is recommended to use the EDH-process especially also for weldable CMS which will further improve the lifespan and reduce the life-cycle costs
Monoblock made of austenitic high-manganese steel (AMS) with welded-on legs
The complete central part of the crossing is cast in one high-manganese steel block. This part is similar to a monoblock crossing, with the exception of the fishing table lengths. At the four ends, closure rails (made from standard rail sections) are welded to the central block by the flash-butt welding process (intermediate piece welding) patented by VAE and proven worldwide. These weldings are subjected to ultrasonic tests. The supporting surfaces (plate bearings) as well as the complete running edges and surfaces are milled. Most importantly, The patented flash-butt welding process of VAE permits the connection of AMS high manganese steel with normal rail steel and thus it can be welded into the CWR track. Further Explosion Depth Hardening process can be applied on the AMS monoblock to increase hardness and thus further increase lifetime of the crossing
Advantages
- Can be thermit welded into the track
- Requires little maintenance because no bolts are used
- Excellent wear resistance due to work-hardening process of AMS
- Optimized wheel transfer conditions
- Guaranteed exchangeability
- Suitable for curved turnouts
- Built-up and repair welding possible without pre-heating
- Suitable for all types of rail fastenings
- Reduced maintenance, particularly for high axle loads because the running surface can be pre-hardened
Technical characteristics:
| Material grades: Crossing | High-manganese steel according to UIC 866 |
| Closure Rails | Either S900 according to UIC 860 and 260 as per CEN or S900A head-hardened (HSH) and 350HT as per CEN Special grades on request |
