Structural and Mechanical Characterization of Hard Layers Obtained by Plasma Jet Thermal Spraying

Romulus Pascu; Dragos Buzdugan; Sorin Dragoi

doi:10.4028/www.scientific.net/AMR.814.41

Paper Titles

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Brazing of Aluminum Bimetallic Sheets in the Design of Heat Exchangers
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Investigation of the Repair Welding Technology Using Ni Base Electrode
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Modeling of Heat Transfer in Pipeline Steel Joint Performed by Submerged Double-Arc Welding Procedure
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Structural and Mechanical Characterization of Hard Layers Obtained by Plasma Jet Thermal Spraying
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Experimental Results on Micrometric Profile of Substrate and Thickness and Roughness of Deposited Layers through Thermal Spraying
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Technological Development Perspectives and Experimental Results of MIG Welding Soldering
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 814Structural and Mechanical Characterization of Hard...

Structural and Mechanical Characterization of Hard Layers Obtained by Plasma Jet Thermal Spraying

Abstract:

In many countries, in the industrial practice, the hard layers deposition is used to increase the hardness of the components active zones. A viable solution to increase the imposed properties consists in the deposition of amorphous layers by thermal spraying. Ferroalloy powders were deposited by plasma jet thermal spraying on aluminium substrates in order to increase the hardness. By plasma jet thermal spraying of Fe-B, Fe-Ni-B and Fe-Cr-Mn-Mo-W-B-P-Si powders on aluminum supports, have been obtained hard layers having the thickness between 72 μm and 86 μm, and granular structures made from α solid solutions, fine particles of specific oxides and complex particles of Fe-B, Fe-B-Si, Fe-Cr, Fe-W-Mo and Fe-P. The measured hardness had the values between 383 and 391 HV1 for the deposited layers made from powders type Fe-B, the values between 410 and 420 HV1 for the deposited layers made from powders type Fe-Ni-B, and the values between 448 and 475 HV1 for the deposited layers made from powders type Fe-Cr-Mn-Mo-W-B-P-Si. No defects, such as cracks or microcracks, have been observed on the hard layers surfaces deposited by plasma jet thermal spraying.

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Periodical:

Advanced Materials Research (Volume 814)

Pages:

41-48

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.814.41

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Online since:

September 2013

Authors:

Romulus Pascu, Dragos Buzdugan, Sorin Dragoi

Keywords:

Aluminum (Al), Hard Coatings, Microhardness, Plasma Jet Thermal Spraying, Structure

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