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Proceedings Paper

Larger-area alloying of CSiB+NiMoCo on carbon steel by a 45-kW CO2 laser: effect of protection gas on process and microstructure
Author(s): Minlin Zhong; Wenjin Liu; Jean-Claude Goussain; Cecile Mayer; Jerome Fritz
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Paper Abstract

Laser alloying of CSiB+NiMoCo by a 45kW CO2 laser was investigated to achieve sound large functional layer with smooth surface, little oxidation and free of cracks on cheap and broadly used common carbon steel XC38. The protection gas has obvious influence on the alloying results. Compared with Ar and N2, He results in the best surface smooth, finest microstructure (second dendrite arm Ar:N2:He equals 1:1:0.6), highest cooling rate (Ar:N2:He equals 1:1.1:4),highest average hardness HV0.2(Ar:N2:He equals 1:1.14:1.15), most resolvability of alloying elements (about Ar:N2:He equals 1:1.1:1.5). These results can be properly explained by mainly the difference in physical properties of these three gases.

Paper Details

Date Published: 7 February 2000
PDF: 6 pages
Proc. SPIE 3888, High-Power Lasers in Manufacturing, (7 February 2000); doi: 10.1117/12.377036
Show Author Affiliations
Minlin Zhong, Tsinghua Univ. (China)
Wenjin Liu, Tsinghua Univ. (China)
Jean-Claude Goussain, Institut de Soudure (France)
Cecile Mayer, Institut de Soudure (France)
Jerome Fritz, Institut de Soudure (France)

Published in SPIE Proceedings Vol. 3888:
High-Power Lasers in Manufacturing
Xiangli Chen; Tomoo Fujioka; Akira Matsunawa, Editor(s)

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