The Influence of Chemical Composition on Residual Stresses in NiCoMo Alloy Deposits on 12 Ni Maraging Steel

Abstract:

The in-plane residual stresses in laser cladded specimens, made of 12-nickel precipitation hardening maraging hot-working tool steel 1.2799 (SIST EN 10027-2) are analyzed using the hole drilling method. The CO2 laser was used to deposit the alloy NiCoMo-1 with significantly higher content of nickel and cobalt with austenitic microstructure at room temperature. The Nd:YAG laser was used to deposit the maraging alloy designated NiCoMo-2, with similar chemical composition as the base material. The comparison of residual stress field showed the sign and the magnitude of residual stresses depends on the chemical composition of the clad being deposited. The high tensile residual stresses were found in NiCoMo-1 layers and favorable compressive residual stresses were found in NiCoMo-2 layers. The metallurgical aspects of residual stress generation are discussed.

• Periodical: Materials Science Forum (Volumes 768-769)
• Pages: 449-455
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.768-769.449
• Online since: September 2013
• Authors: Zoran Bergant, Janez Grum
• Keywords: Hole Drilling Method, Laser Cladding, Laser Repairing Cladding, Laser Surface Cladding, Maraging Steel, Residual Stress

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