DISTRIBUTION OF THE RADIAL MACROSTRESSES IN RAIL HEADS AFTER HIGH-TEMPERATURE THERMOMECHANICAL TREATMENT
X-ray strain measurement is used to study the radial macrostress distribution in R-65 type rail heads as a function of the high-temperature thermomechanical treatment parameters (austenitization temperature and amount of reduction). It is demonstrated that high-temperature thermomechanical treatment produces beneficial compressive stresses in the tread contact surface of the rail head, the overall level of which increases with decrease in hardening temperature after reduction. The rail used in the study was rolled in a special prefinishing pass on the Kuznets Iron and Steel Combine's Rail and structural mill and subsequently finished on a 4-high mill at the Siberian Metallurgical Institute. The experimental data are plotted and it shows that the residual stresses tend to decrease smoothly at the center of the head. It was also concluded that the work hardening of rails by hardening in a water-air mixture results in the formation of compressive stresses with a beneficial effect on the fatigue strength of the rails.
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Corporate Authors:
Metals Society
1 Carlton House Terrace
London SW1Y 5DB, England -
Authors:
- Chelyshev, N A
- Gossman, A A
- Tsvigun, V N
- Nekrasov, S G
- Publication Date: 1974
Media Info
- Features: Figures; References;
- Pagination: p. 97-99
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Serial:
- Steel in the USSR
- Issue Number: 6
Subject/Index Terms
- TRT Terms: Fatigue (Mechanics); Fatigue strength; Heat treated rail; Metal hardening; Rail (Railroads); Rail steel; Railhead; Strain measurement; Stresses; Structural tests
- Old TRIS Terms: Rail hardening; Rail steel metallurgy; Rail stress; Rail tests
- Subject Areas: Bridges and other structures; Railroads;
Filing Info
- Accession Number: 00172933
- Record Type: Publication
- Files: TRIS
- Created Date: Mar 29 1978 12:00AM