Elaboration of metallic and composite fillings by plasma transferred arc. Process analysis and tribological study
Creators
- Rochette, Philippe
- Institut Superieur des Materiaux et de la Construction Mecanique - I.S.M.C.M., Laboratoire de tribologie, Saint Ouen (France)
- Agence Francaise pour la Maitrise de l'Energie - A.F.M.E. (France)
- Commissariat a l'Energie Atomique - CEA, Centre d'Etude Nucleaire de Grenoble - C.E.N.G., Departement de Metallurgie de Grenoble - DMG, Service de Developpement et de Transferts Technologiques - SDTT, Section de Genie des Materiaux - SGM, Laboratoire d'Etudes et de Caracterisation des Materiaux - LECM (France)
Description
The experimental part of this research thesis addresses the parametric study of two surface filling processes (by plasma transferred arc, and by plasma arc projection followed by a coating remelting by electron beam), the elaboration by plasma transferred arc and the metallurgical characterization of fillings of nickel base alloys and composite materials made of tungsten carbides dispersed in a nickel matrix, and the characterization of fretting wear of the so-elaborated fillings in aqueous environment. The results show that the plasma transferred arc filling technique allows coating quality and microstructure to be controlled by adjusting the mass energy of the transferred arc. Besides, this technique results in a very good control of nickel alloy coatings. The various studied composites show that it is better to use a matrix with very few alloying elements or pre-coated carbides in order to avoid any cracking phenomenon. The content of dispersed carbides must not be greater than 60 per cent in weight. The best wear behaviour is obtained with polyhedral tungsten carbides dispersed within a low alloyed nickel matrix
Abstract (French)
La partie experimentale de ce travail se rapporte: - a l'etude parametrique de deux procedes de rechargement de surface: - l'un par plasma d'arc transfere; - l'autre par projection d'arc plasma, suivie d'une refusion du revetement par faisceau d'electrons. - a l'elaboration par plasma d'arc transfere, puis a la caracterisation metallurgique de rechargements d'alliages a base nickel et de materiaux composites, formes d'une dispersion de carbures de tungstene dans une matrice nickel; - a la caracterisation a l'usure par frottement en milieu aqueux des rechargements elabores. Les resultats montrent que: - la technique de rechargement par plasma d'arc transfere permet de controler la qualite ou la microstructure des depots, essentiellement par reglage de l'energie massique de l'arc transfere; - cette meme technique assure une tres bonne maitrise des depots d'alliages nickel. Les differents composites elabores, a matrices et phases dispersees variables, indiquent qu'il est preferable d'utiliser une matrice tres peu chargee en elements d'alliages ou des carbures pre-enrobes, pour eviter tout phenomene de fissuration. Il ressort d'autre part, que la teneur limite en carbures disperses peut difficilement depasser 60 pc en poids; - de tous les rechargements d'alliage ou composites elabores, le comportement a l'usure le plus favorable correspond au couple forme d'une dispersion de carbures de tungstene polyedriques (40 pc en poids ) au sein d'une matrice nickel tres faiblement alliee. (auteur)Files
47066557.pdf
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Additional details
Additional titles
- Original title (French)
- Elaboration de rechargements metalliques et composites par plasma d'arc transfere, Analyse de procede et etude tribologique
Identifiers
Publishing Information
- Imprint Pagination
- 257 p.
- Report number
- FRCEA-TH--6987
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 47066557
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- CHEMICAL COMPOSITION; COMPARATIVE EVALUATIONS; COMPOSITE MATERIALS; FRETTING CORROSION; LINING PROCESSES; MECHANICAL PROPERTIES; METALLURGICAL EFFECTS; MICROSTRUCTURE; NICKEL BASE ALLOYS; PHYSICAL METALLURGY; PHYSICAL PROPERTIES; PLASMA ARC WELDING; SURFACE COATING; TUNGSTEN CARBIDES; WEAR RESISTANCE
- Descriptors DEC
- ALLOYS; ARC WELDING; CARBIDES; CARBON COMPOUNDS; CHEMICAL REACTIONS; CORROSION; DEPOSITION; EVALUATION; FABRICATION; JOINING; MATERIALS; MECHANICAL PROPERTIES; METALLURGY; NICKEL ALLOYS; REFRACTORY METAL COMPOUNDS; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENT COMPOUNDS; TUNGSTEN COMPOUNDS; WELDING
Optional Information
- Notes
- 44 refs.; Available from the INIS Liaison Officer for France, see the 'INIS contacts' section of the INIS website for current contact and E-mail addresses: http://www.iaea.org/inis/Contacts/