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Laser Strip Cladding for Large Area Metal Deposition

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Pages (from-to)208-216
Number of pages9
JournalAdditive Manufacturing
Volume27
DOIs
Publication statusPublished - 15 Mar 2019
Publication typeA1 Journal article-refereed

Abstract

Directed energy deposition (DED) processes frequently rely on metallic powder and wire feedstock materials. Several grades of metallic strips are, however, commercially available but not yet largely utilized in DED. This paper introduces a newly developed laser strip cladding process, which can be used for surfacing, repair and additive manufacturing. Cladding tests consisted of single-layer single- and multi-bead tests on planar and round bar type base materials using a 30 mm wide solid Alloy 625 strip. The results showed that with 8 kW laser power 34 mm wide and ˜2 mm thick single beads on steel could be produced with low dilution and fusion bond with high deposition (8 kg/h) rates. In multi-bead tests, coverage rates of 0.45 m2/h were reached. Corrosion performance of clad deposit was influenced by the inhomogeneous distribution of intermixed iron from the base material on a test surface. In addition to high productivity, the developed process takes advantage of large build volume (>1 m3) and full material utilization as well as clean process conditions.

Keywords

  • Additive manufacturing, Directed energy deposition, Laser cladding, Strip feedstock, Alloy 625, Corrosion

Publication forum classification

Field of science, Statistics Finland