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Investigation on microstructure and wear characteristic of laser cladding Fe-based alloy on wheel/rail materials
- Source :
- Wear. :592-599
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- The aim of this study is to investigate the influence of laser cladding Fe-based alloy on microstructure and wear characteristic of wheel/rail materials using a rolling–sliding wear testing apparatus. Especially, the effect of lanthanum oxide on the properties of laser cladding coating was explored in detail. The results show that the laser cladding Fe-based alloy coating consists of dendrites and eutectic and is composed of (Fe, Ni) solid solution and Cr 7 C 3 carbide. The hardness and wear-resistance of wheel/rail materials are enhanced using laser cladding. The wear and surface damage of wheel/rail rollers dramatically alleviate owing to the refinement of the microstructure when adding lanthanum oxide into laser cladding coating. The wear mechanism of wheel/rail rollers turns from severe spalling and delamination wear (untreated specimens) to slight peeling (with 1.2% La 2 O 3 ). Furthermore, the plastic deformation of wheel/rail rollers undergoing laser cladding is significantly thinner than that of untreated rollers. In summary, laser cladding Fe-based alloy coating can be used to prolong the wear life of wheel and rail materials.
- Subjects :
- Materials science
Alloy
Metallurgy
Delamination
Surfaces and Interfaces
engineering.material
Condensed Matter Physics
Microstructure
Spall
Surfaces, Coatings and Films
Carbide
chemistry.chemical_compound
Coating
Lanthanum oxide
chemistry
Mechanics of Materials
Materials Chemistry
engineering
Composite material
Eutectic system
Subjects
Details
- ISSN :
- 00431648
- Database :
- OpenAIRE
- Journal :
- Wear
- Accession number :
- edsair.doi...........e9383b8d73899a83fc64a7138b9be69d