The laser surface cladding technique was used to form in situ Fe-Cr-Mn-C alloys on AISI 1016 steel substrate. In this process mixed powders containing Cr, Mn, and C with a ratio of 10:1:1 were delivered using a screw feed, gravity flow carrier gas aided system into the melt pool generated by a 10 kW CO₂ laser. This technique produced ultrafine microstructure in the cladded alloy. The microstructure of the laser surface cladded region was investigated by optical, scanning and transmission electron microscopy and x-ray microanalysis techniques. Microstructural study showed a high degree of grain refinement and an increase in solid solubility of alloying elements which, in turn, produced a fine distribution of complex types of carbide precipitates in the ferrite matrix because of the high cooling rate. An alloy of this composition does not show any martensitic or retained austenite phase.

Date Published: 21 October 1986
PDF: 10 pages
Proc. SPIE 0650, High Power Lasers and Their Industrial Applications, (21 October 1986); doi: 10.1117/12.938105

Published in SPIE Proceedings Vol. 0650:
High Power Lasers and Their Industrial Applications
Dieter Schuoecker, Editor(s)