Direct laser cladding of Ni-based alloy powder for industrial applications

Rafal Jendrzejewski; Gerard Sliwinski; Ana Conde; Juan J. de Damborenea

doi:10.1117/12.515844

10 November 2003 Direct laser cladding of Ni-based alloy powder for industrial applications

Rafal Jendrzejewski, Gerard Sliwinski, Ana Conde, Juan J. de Damborenea

Proceedings Volume 5120, XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; (2003) https://doi.org/10.1117/12.515844
Event: XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2002, Wroclow, Poland

Abstract

Coatings of the nickel-based Metco 16C on the chromium steel substrate of a composition designed for the steam turbine blades are produced in a direct laser cladding process. A cw 1.2 kW CO₂ laser stand equipped with a multi-stream nozzle mounted co-axially with the focusing optics is applied. Experiments are performed for the non-preheated as well as the preheated base material. Differences in microstructure, chemical composition, and in the cracking susceptibility between coatings produced on preheated (800-900K) and non-preheated substrates are analyzed by means of scanning electron microscopy (SEM) and the Energy Dispersive X-ray Spectroscopy (XEDS). Results indicate a significant improvement of the clad quality with the increase of preheating temperature. The presence of Fe in the coating is ascribed to migration from substrate due to preheating.

Citation Download Citation

Rafal Jendrzejewski, Gerard Sliwinski, Ana Conde, and Juan J. de Damborenea "Direct laser cladding of Ni-based alloy powder for industrial applications", Proc. SPIE 5120, XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (10 November 2003); https://doi.org/10.1117/12.515844

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