CAUSE FOR THE FORMATION OF GROOVES ON THE WHEELS OF BLOCK-BRAKED RAILROAD ROLLING STOCK AND THEIR PREVENTION

URSACHE DER RILLENBILDUNG UND DEREN VERMEIDUNG BEI RAEDERN KLOTZGEBREMSTER SCHIENEFAHRZUEGE

Grooves on the friction surface of block-braked car and locomotive wheels are not formed as a result of hard structural consitituents in the cast-iron brake blocks, but rather as a result of partial melting and displacement of the wheel steel softened by heating in excess of the solids temperature during the friction process. The displaced steel collects for the most part on the braking surface of the block in the form of foil laminations. The cause for this phenomenon lies in an excessively high softening temperature of the brake block material. To prevent the occurrence of this defect, it is suggested to use cast iron containing low-melting structural constituents in adequate quantity and distribution.

• Corporate Authors:

  Allianz Versicherungs AG

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

Language

• German

Media Info

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

Subject/Index Terms

• TRT Terms: Brake shoes; Brakes; Defects; Thermal stresses; Tire treads; Vehicle design; Wear; Wheels
• Old TRIS Terms: Brake design; Tread braking; Wheel flaws; Wheel thermal stresses; Wheel tread damage; Wheel treads
• Subject Areas: Design; Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00095245
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Jul 15 1976 12:00AM