METALLOGRAPHIC OBSERVATION OF THE TREAD OF WHEELS SUBJECTED TO VARIOUS SERVICE CONDITIONS

The present paper reports the results of the metallographic observation of the tread of wheels subjected to various service conditions. Wheels in the present investigation are classified into those with on-tread brake and those without it, and the former is further divided into two groups according to the brake shoe, either castiron or composition (synthetic resin base). Work hardening of the tread region due to rolling contact with rail is observed. Heavily deformed cementile lamella in pearlite is frequently observed in the surface region. When using an on-tread brake, heat affected layers develop. There are many varieties in the heat-affected microstructure; martensite, tempered martensite, various incompletely hardened structures, and spheroidized carbide structures. Defects observed on the tread are heat-checks, spalling, flaky surface, skidding marks, fused deposits, thermal cracks, shelling, and growing.

• Corporate Authors:

  Iron and Steel Institute of Japan

  Keidanren Kaiken (3rd f1), 9-4 otemachi 1-chome, Chiyoda-ku
  Tokyo 100,   Japan 
• Authors:
  • Kunikake, T
  • Nishimura, S
  • Tagashira, H
• Publication Date: 1970

Media Info

• Pagination: p. 476-489
• Serial:
  • Iron and Steel Institute of Japan Transactions
  • Volume: 10
  • Issue Number: 6
  • Publisher: Iron and Steel Institute of Japan

Subject/Index Terms

• TRT Terms: Dynamics; Metallography; Rail (Railroads); Train track dynamics; Wheels
• Uncontrolled Terms: Observations
• Old TRIS Terms: Wheel treads
• Subject Areas: Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00046926
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Nov 14 1976 12:00AM