The high-speed sliding bed plate is an important part of the railway switch. The friction between the switch rail and the sliding bed plate can easily cause wear and tear. The traditional composite plating process has serious pollution, and the poor bonding force between the coating and the plate base can easily cause the coating to peel off. It cannot meet the hardness and anti-corrosion technical requirements of long life, safety, and reliability of high-speed railways. We use laser surface treatment technology to repair it.

The high-speed sliding bed plate is an important part of the railway switch. The friction between the switch rail and the sliding bed plate can easily cause wear and tear. The traditional composite plating process has serious pollution, and the poor bonding force between the coating and the plate base can easily cause the coating to peel off. It cannot meet the hardness and anti-corrosion technical requirements of long life, safety, and reliability of high-speed railways. We use laser surface treatment technology to repair it.

Repair name: High-speed sliding bed deck

Material Name: ZG230-450

basic situation:
During long-term use, high-speed turnout sliding beds frequently bear pressure and friction. Combined with various climatic environments on railway lines, they are prone to wear and corrosion.

Repair requirements:
1. Corrosion resistance
The protection level after 200 hours of neutral salt spray (NSS) test is not lower than the level 9 requirements in GB/T 10125-2012.
2. Wear resistance (temporarily refer to the hardness index)
The Rockwell hardness of the coating should be HRC ≥ 40 (hard chromium plating micro-Vickers hardness requirement ≥ HV800).
3. Bonding layer strength
In accordance with the requirements of GB/T 8165-2008, the shear strength is ≥210MPa; the inner and outer bending tests should ensure that there are no visible cracks in the bonding layer and cladding when the bending angle reaches 90°.