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Friction surfaced tool steel (H13) coatings on low carbon steel: A study on the effects of process parameters on coating characteristics and integrity
H. Khalid Rafi, , , K. Prasad Rao
Published in
2010
Volume: 205
   
Issue: 1
Pages: 232 - 242
Abstract
Tool steel H13 was friction surfaced on low carbon steel substrates. Mechtrode (consumable rod) rotational speed and substrate traverse speed were varied, keeping the axial force constant. The effects of process parameters on coating characteristics and integrity were evaluated. A process parameter window was developed for satisfactory deposition of tool steel coatings. Coating microstructures were examined using optical microscopy, scanning electron microscopy, and transmission electron microscopy. Microhardness tests, shear tests, and bend tests were conducted on coatings. The results show that coating width is a strong function of mechtrode rotational speed, while coating thickness is mainly dependent on substrate traverse speed. Lower mechtrode rotational speeds results in wider coatings, while higher substrate traverse speeds produce thinner coatings. Thinner coatings exhibit higher bond strength than thicker coatings. Coatings show no carbide particles, yet exhibit excellent hardness (above 600 HV) in as-deposited condition due to their martensitic microstructure. © 2010 Elsevier B.V.
About the journal
JournalSurface and Coatings Technology
ISSN02578972
Open AccessNo
Concepts (36)
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    AXIAL FORCES
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    BEND TEST
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    Bond strength
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    CARBIDE PARTICLES
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    Coating characteristics
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    COATING MICROSTRUCTURES
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    Coating thickness
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    FRICTION SURFACING
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    Low carbon
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    MARTENSITIC MICROSTRUCTURE
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    MICROHARDNESS TESTS
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    Process parameters
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    Rotational speed
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    SHEAR TESTING
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    Shear tests
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    THINNER COATINGS
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    TRAVERSE SPEED
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    Bond strength (materials)
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    Carbides
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    Coatings
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    Friction
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    Friction welding
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    Light transmission
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    Low carbon steel
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    Microstructure
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    Optical microscopy
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    Scanning electron microscopy
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    Speed
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    Steel testing
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    Substrates
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    Superconducting wire
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    Thickness measurement
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    Transmission electron microscopy
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    Tribology
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    ZINC PLATING
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    Tool steel