FW4102-welded 
 18 ~ 22HRC 
 After cold hardening 
 50 ~ 55HRC mainly used to bear the strong impact of the stone machine parts, excavator parts, railway switches, and bullied the role of water erosion and other turbine components Surfacing. The coal mine in central groove scraper transport mechanical systems components - W sprocket repair of steel and the best surfacing material. For withstanding impact loads of the workpiece surface or hard surface surfacing surfacing surfacing before the transition layer.