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Graded layers for wear and corrosion protection produced by laser cladding

: Weisheit, A.; Wissenbach, K.


Fischer, A. ; Deutsche Gesellschaft für Materialkunde e.V. -DGM-, Oberursel:
Friction, wear and wear protection : International Symposium on Friction, Wear and Wear Protection 2008 Aachen, Germany, from April 9th to 11th, 2008
Weinheim: Wiley-VCH, 2009
ISBN: 978-3-527-32366-1
International Symposium on Friction, Wear and Wear Protection <2008, Aachen>
Fraunhofer ILT ()

Graded layers on the basis of Fe- and Ni-alloys were developed for applications in the tool making industry. The graded materials are formed layer by layer with a continuous change of the composition in each layer using the technology of laser beam cladding with powder feeding. The composition of the graded layers aims at the improvement of wear and corrosion resistance as well as thermal shock resistance. Depending on the composition a surface hardness up to 65 HRC can be achieved. The layers on steel substrates are crack free up to 60 HRC. The graded materials can also be clad on a Cu substrate using the bonding layer Fe33Ni. The hardness should be limited to values around 50 HRC to ensure crack free cladding. Machining of the materials using milling, grinding, EDM and polishing was proved. A thermal shock test and a wear test process have shown promising results regarding the applicability ofthe various graded layers for the injection moulding process.