STRUCTURAL STUDIES OF THE PLASMASPRAYED LAYERS DEPOSITED ON THE STEAM TURBINE BLADES

C. Munteanu, G. L. Pintilei, C. Paulin, C. I. Barbînta

Abstract

The method of plasma spraying for obtaining superficial layers with special properties has begun to be increasingly used in industry. In this paper are described and presented a series of layers experimentally obtained, using powders of WC-Co type on different substrates (steel and Ni alloy) in order to observe the influence of the substrate on the interface and the characteristics of the deposited layer. The attention was paid to the layers that must meet the hardening requirements of the steam inlet borders in the rotor blades network of the low-pressure body of the steam turbines. The analyzed samples were obtained by thermal spraying, using an atmospheric plasma spray installation type SPRAYWIZARD - 9MCE. To highlight the results were performed analyses of scanning electron microscopy (electron microscope type QUANTA 200 3D DUAL BEAM) and X-Ray diffraction (diffractometer X’PERT PRO MRD) for determining the phases and constituents from the deposited layer.

Keywords

SEM, XRD, WC-Co

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IMEKO-YSESM-2012-48.pdf

DOI

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IMEKO TC

TC15 - Experimental Mechanics

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