CUED Publications database

Hardfacing using supersonic laser depostion of stellite-6

Lupoi, R and Cockburn, A and Sparkes, M and Bryan, C and Luo, F and O'Neill, W (2011) Hardfacing using supersonic laser depostion of stellite-6. 30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011. pp. 435-441.

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Abstract

The capability of manufacturing coatings is of central importance in engineering design. Many components require nowadays the application of additional layers, to enhance mechanical properties and protect against hostile environments. Supersonic Laser Deposition (SLD) is a novel coating method, based upon Cold Spray (CS) principles. In this technique the deposition velocities can be significantly lower than those required for effective bonding in CS applications. The addition of laser heat energy permits a change in the thermodynamic experience of impacting particles, thereby offering a greater opportunity for metallurgical bonding at lower velocities compared to the CS process technology. The work reported in this paper demonstrates the ability of the SLD process to deliver hard facing materials to engineering surfaces. Stellite-6 has been deposited on low carbon steel tubes over a range of process parameters, determining the appropriate target power and traverse speeds for coating deposition. Coating properties and parameters were examined to determine the main properties, micro-structure and processing cost. Their morphology was studied through optical microscopy, SEM and X-Ray Diffraction. The results have shown that SLD is capable of depositing Stellite-6, with enhanced properties compared to laser clad counterparts.

Item Type: Article
Uncontrolled Keywords: Cold Spray Deposition Laser Metal SLD Supersonic
Subjects: UNSPECIFIED
Divisions: Div E > Production Processes
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:25
Last Modified: 28 Nov 2014 19:06
DOI: