Micro-Arc Nitriding of Titanium Surface

Kiyotaka Matsuura; Hiroshi Arita; Tatsuya Ohmi; Masayuki Kudoh; Yoshinari Miyamoto

doi:10.4028/www.scientific.net/MSF.492-493.225

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HomeMaterials Science ForumMaterials Science Forum Vols. 492-493Micro-Arc Nitriding of Titanium Surface

Micro-Arc Nitriding of Titanium Surface

Abstract:

When a surface of a titanium disk was melted in an atmosphere of pure nitrogen using a 3D Micro Welder which was designed by the present authors, the surface was nitrided to a depth of 90 to 260μm depending on the arc current of 6 to 24 A. The concentration of nitrogen in the nitrided layer was approximately 50 mol% at the surface, and the concentration decreased as the distance from the surface increased. A TiN layer was formed at the surface, and beneath the TiN layer, a dual phase layer of TiN and α-Ti was formed. Vickers hardness was approximately 1800 in the TiN layer and it varied from 900 to 200 in the dual phase layer as the distance from the surface increased.

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Materials Science Forum (Volumes 492-493)

Pages:

225-228

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.492-493.225

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Online since:

August 2005

Authors:

Kiyotaka Matsuura, Hiroshi Arita, Tatsuya Ohmi, Masayuki Kudoh, Yoshinari Miyamoto

Keywords:

Arc Welding, Surface Modification, Titanium Nitride TiN, Wear

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