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The microstructure and high temperature wear performance of a nickel base hardfaced coating
Published in
2010
Volume: 204
   
Issue: 24
Pages: 4034 - 4043
Abstract
In the present study, influence of microstructure on high temperature dry sliding wear behavior of nickel base hardfaced coating is discussed in detail. Using plasma transferred arc (PTA) welding process, coating of nearly 4 to 5. mm thickness was deposited on 316 L (N) stainless steel substrate without any defects. The as-deposited coating contains large quantity of precipitates (range from 100nm to 20μm in size) in the γ-nickel matrix which increased the hardness significantly. Sliding wear tests were carried out on the coating for different sliding distances at room temperature (RT) and also higher temperature (573. K, and 823. K). Results showed that the wear resistance of coating improved significantly with increase in test temperature, and the high wear resistance was observed at 823. K. The coating exhibited different operating wear mechanisms depending on sliding distances and also test temperature. The wear mechanisms were identified based on friction and wear values along with worn surface analysis. The operating wear mechanisms at 823. K are adhesion at shorter sliding distance and tribo-oxidation at longer sliding distance. © 2010 Elsevier B.V.
About the journal
JournalSurface and Coatings Technology
ISSN02578972
Open AccessNo
Concepts (33)
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    316L
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    DEPOSITED COATINGS
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    DRY SLIDING WEAR
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    FRICTION AND WEAR
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    High temperature
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    HIGH TEMPERATURE WEAR
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    HIGH WEAR RESISTANCE
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    Higher temperatures
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    NICKEL MATRIX
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    PIN ON DISC
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    PIN-ON-DISC [B]
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    PLASMA TRANSFERRED ARC
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    Room temperature
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    SLIDING DISTANCES
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    SLIDING WEAR TESTS
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    Stainless steel substrates
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    Test temperatures
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    TRIBOOXIDATION
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    Wear mechanisms
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    Welding process
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    Worn surface
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    Coatings
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    HARD FACING
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    Microstructure
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    Nickel
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    Nickel alloys
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    Nickel coatings
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    PLASMA WELDING
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    Stainless steel
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    Surface analysis
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    Tribology
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    Wear of materials
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    Wear resistance