Microstructure and abrasive wear of cobalt-based laser coatings

Journal Article · Wed Jan 15 04:00:00 EST 1997 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(96)00346-6· OSTI ID:417909

De Hosson, J T.M. ^[1]

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1. Univ. of Groningen (Netherlands)

Cobalt-based alloys are used as wear-resistant materials for hardfacing cheap steel substrates. A substantial enhancement in mechanical properties of cobalt-based superalloys is attributed to the martensitic fcc {yields} hcp phase transformation. Alloying elements can be classified as phase modifiers (Ni and Fe stabilize fcc whereas W and Cr stabilize hcp), solid-solution strengtheners (W and Mo), which affect only the matrix, and elements that form carbides (Cr-rich M{sub 7}C{sub 3} and M{sub 23}C{sub 6}, M = metal). Of the different depositing techniques such as plasma spray, tungsten inert gas, oxyacetylene flame and laser cladding, the latter delivers coatings with a low dilution with the substrate material and no pores. Moreover, the laser cladding process has the advantage of being well controllable. This paper reports on the deposition of five different cobalt-based Stellite alloys on steel substrates by laser cladding.

• OSTI ID: 417909
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 2 Vol. 36; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON DIOXIDE LASERS
EXPERIMENTAL DATA
LIQUID METALS
MICROSTRUCTURE
POWDERS
PROTECTIVE COATINGS
STAINLESS STEEL-316
STELLITE
SURFACE COATING
WEAR RESISTANCE