Laser cladding using scanning optics: Effect of the powder feeding angle and gas flow on process stability

Joonas Pekkarinen, Antti Salminen, Veli Kujanpää, Jarmo Ilonen, Lasse Lensu, Heikki Kälviäinen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

2 Citations (Scopus)

Abstract

Powder feeding is one of the single most important factors which defines the qualitative outcome of the cladding process. If the powder feeding or a powder cloud suffers from any form of interference, it will directly affect the quality of the clad bead. This study thus focuses on the effect of the powder feeding angle and the flow rate of the powder carrying gas on powder cloud behavior under the scanned laser beam during the laser cladding process. In this study, powder feeding angles from 40 to 70 degrees were tested with powder feeding gas flow rates of 3 and 6 l/min and with laser scanning frequencies ranging from 80 to 150 Hz. Additive material used was 316L, and the substrate material was low alloyed steel. Powder cloud behavior was simultaneously monitored in situ with a highspeed camera and spectrometer. The results showed that the stability of the powder cloud was highly dependent on the tested parameters. Also, a direct correlation between the vaporization of the powder cloud and the increase of dilution was noticed
Original languageEnglish
Title of host publicationCongress Proceedings
Subtitle of host publication32nd International Congress on Applications of Lasers & Electro-Optics, ICALEO 2013
Place of PublicationMiami, Florida, U.S.A.
PublisherLaser Institute of America
Pages590-599
ISBN (Print)978-0-912035-98-7
Publication statusPublished - 2013
MoE publication typeNot Eligible
Event32nd International Congress on Applications of Lasers and Electro-Optics, ICALEO 2013 - Miami, United States
Duration: 6 Oct 201310 Oct 2013
Conference number: 32

Conference

Conference32nd International Congress on Applications of Lasers and Electro-Optics, ICALEO 2013
CountryUnited States
CityMiami
Period6/10/1310/10/13

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