The State of Differently Heat-Treated 12% Ni Maraging Steel after Laser Remelting


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The paper describes the results obtained in an investigation of laser remelting of specimens made of 12% Ni maraging steel suitable for the manufacture of highly thermomechanically loaded machine parts or tool parts. The aim of the investigation was to establish the state of differently heat treated maraging steel after a laser repair processes including melting of the material. An analysis of the specimens with an optical microscope after laser remelting showed, regardless of the initial condition, a cellular-dendritic microstructure in the remelted track. In the heat-affected zone surrounding the laser-remelted track the microstructure varied considerably also regardless of the initial condition. A microstructure analysis supported by microhardness measurements made it possible to define several microstructural zones or sub-zones in the heataffected zone. The measurement of residual stresses using the relaxation hole-drilling method close to the laser-remelted track was used to study the influence of the initial material state on the residual stresses after laser remelting.



Materials Science Forum (Volumes 537-538)

Edited by:

J. Gyulai and P.J. Szabó




J. Grum and J. M. Slabe, "The State of Differently Heat-Treated 12% Ni Maraging Steel after Laser Remelting", Materials Science Forum, Vols. 537-538, pp. 647-654, 2007

Online since:

February 2007




[1] R.F. Decker and S. Floreen: in R.K. Wilson (Ed. ), Maraging Steels: Recent Developments and Applications, TMS-AIME, Warrendale, PA, 1988, p.1.

[2] H.J. Becker, K.D. Fuchs and E. Haberling: Thyssen Edelstahl Technischer Bericht, 1990, p.53.

[3] B. Gehricke: in Proceedings of the Conference on the Die Casting Technology in Harmony with the Environment, Cleveland, 1993, p.209.

[4] J.D. Verhoeven: Fundamentals of Physical Metallurgy, John Wiley & Sons, New York, (1975).

[5] M. Schmidt and K. Rohrbach: in J.R. Davis (Ed. ), Heat Treating, Vol. 4, ASM Handbook, 1994, p.219.

[6] X. Li and Z. Yin: Materials Letters, 24 (1995) 239.

[7] W.M. Steen: Laser Material Processing, Springer-Verlag, London, (1991).

[8] C.E. Albright: in S.S. Charschan (Ed. ), Guide to Laser Materials Processing, Laser Institute of America, p.97.

[9] J. Grum and M. Zupančič: Z. Metallkd. 93 (2002) 171.

[10] J. Grum and M. Zupančič: Z. Metallkd. 93 (2002) 164.

[11] Annual Book of ASTM Standards, Designation E 837 - 94a: Standard Test Method for Determining Residual Stresses by the Hole-Drilling Strain-Gage Method, Vol. 03. 01, American Society for Testing and Materials, Philadelphia, (1994).


[12] Vishay Measurements Group, Inc., Measurements Group TECH NOTE, TN-503-5, Residual Stress Measurement, Measuring of Residual Stresses by the Hole-Drilling Strain Gage Method, (1993).

[13] J. Grum, J.M. Slabe: Surface and Coatings Technology, 180-181 (2004) 596.