High speed pounding: A novel technique for the preparation of a thick surface layer with a hardness gradient distribution on Hadfield steel

A novel surface modifying technique, high speed pounding (HSP), has been developed to prepare a prehardened layer. By optimizing the HSP parameters an ideal prehardened layer 16 mm in depth, with a maximum surface hardness of ∼50 HRC and a gradual decrease in hardness from the surface to the matrix...

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Bibliographic Details
Published in:Scripta materialia 2011-03, Vol.64 (6), p.560-563
Main Authors: Zhang, F.C., Yang, Z.N., Qian, L.H., Liu, F.C., Lv, B., Zhang, M.
Format: Article
Language:English
Subjects:
Hadfield steel
Hardness
High speed
High speed pounding
Optimization
Pounding
Railroad crossings
Railway crossings
Railway engineering
Structural steels
Surface
Surface layer
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Summary:A novel surface modifying technique, high speed pounding (HSP), has been developed to prepare a prehardened layer. By optimizing the HSP parameters an ideal prehardened layer 16 mm in depth, with a maximum surface hardness of ∼50 HRC and a gradual decrease in hardness from the surface to the matrix was successfully fabricated on Hadfield steel. Practical service tests demonstrated that the service lifetime of Hadfield steel railway crossings prehardened by HSP is more than triple that without prehardened treatment.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2010.11.043