Journal of the Southern African Institute of Mining and Metallurgy
versão On-line ISSN 2411-9717
versão impressa ISSN 0038-223X
OLIVARES, R. Ordóñez; GARCIA, C.I. e HENRANDEZ, F.C. Robles. Metallurgy of high-carbon steels for railroad applications. J. S. Afr. Inst. Min. Metall. [online]. 2013, vol.113, n.2, pp.155-162. ISSN 2411-9717.
This manuscript focuses on the design and development of steels for the railroad industry and methods of testing them. Here are summarized the results of research focusing on alloy development and design, with particular focus on advanced rails and wheels. The high-performance steels are characterized for their mechanical and service characteristics. The relationship between properties and cleanliness is discussed and compared to the regular railroad steel. Some of the tests presented are standard tests that are complemented with the nonstandard test recommended by the Association of American Railroads (AAR) and recommended modifications of this. The paper presents the results of metallurgical analysis, mechanical, and residual stress tests. The laboratory methods include microstructure, residual stresses, tensile, hardness, fracture toughness, and microcleanliness tests.
Palavras-chave : alloy design; steel; railroads; thermomechanical processing.