High-strength, damage-resistant rail

Details High-strength, damage-resistant rail High-strength, damage-resistant rail

1992-04-07

1993-05-11

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148660, 148320, 148333, 148334, 148335, 148336, C21D 118

Patent

active

052097927

ABSTRACT:
A high-strength, damage-resistant rail characterized by essentially consists of 0.60 to 0.85 wt. % of C, 0.1 to 1.0 wt. % of Si, 0.5 to 1.5 wt. % of Mn, not more than 0.035 wt. % of P, not more than 0.040 wt. % of S, and not more than 0.05 wt. % of Al, a balance being Fe and indispensable impurity. The rail comprises corner and head side portions having a Brinell hardness H.sub.B of 341 to 405 and a head top portion having a hardness which is not more than 0.9 of the Brinell hardness of the corner and head side portions.

REFERENCES:
patent: 4575397 (1986-03-01), Heller
patent: 4767475 (1988-08-01), Fukuda et al.
patent: 4913747 (1990-04-01), Fukuda et al.
Davis, H. E., Troxell, G. E., and Wiskocil, C. T., The Testing and Inspection of Engineering Materials, Third Edition, McGraw-Hill Book Company, 1964, pp. 211-212.

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