THE CAUSE OF SCALING ON RAIL VEHICLE WHEELS FITTED WITH BRAKE SHOES, HOW TO RECOGNIZE IT

URSACHE DE RILLENBILDUNG UND DEREN VERMEIDUNG BEI RAEDERN KLOTZGEBREMSTER SCHINENFHRZEUGE

Scaling on the running surface of rail vehicle wheels fitted with brake shoes is caused by segregation through melting and upsetting of the steel of the wheel which is heated to the temperature limit for solids and softened during braking. Scaled steel gathers on the brake shoes's friction surface as the scales pile up. The reason for this phenomenon is the very high softening temperature of the brake shoe material. The scaling phenomenon can be stopped by using cast iron with structural elements that have a low fusion temperature. Phosphorus forms a eutectic in the Fe-C-P system which melts at 950 degrees C.

• Corporate Authors:

  Allianz Versicherungs AG

  28 Koeniginstrasse, Postfach 24
  8000 Munich,   Germany 
• Authors:
  • Pahl, E
• Publication Date: 1974

Language

• German

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 107-114
• Serial:
  • Maschinenschaden
  • Volume: 47
  • Issue Number: 3
  • Publisher: Allianz Versicherungs AG

Subject/Index Terms

• TRT Terms: Brake shoes; Braking performance; Thermal stresses; Tire treads; Wheels
• Old TRIS Terms: Tread braking; Wheel shelling; Wheel thermal stresses; Wheel tread damage
• Subject Areas: Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00096623
• Record Type: Publication
• Source Agency: International Union of Railways
• Files: TRIS
• Created Date: Aug 27 1975 12:00AM