A. Wang et al., LASER CLADDING OF IRON-BASE ALLOY ON AL-SI ALLOY AND ITS RELATION TO CRACKING AT THE INTERFACE, Journal of materials engineering and performance, 5(6), 1996, pp. 775-783
The present study established the basic operating range and diagram fo
r cladding, by means of a laser, a cast Al-Si alloy substrate with an
iron-base material, Considering that the main difficulty was interface
cracking during this processing, the factors affecting the interface
cracking ratio (ICR) were investigated from two aspects: the laser pro
cessing parameters (e.g., laser power, traverse speed, powder-feed rat
e, preheating temperature of the substrate, tempering temperature) and
the material factor, including the composition of clad. The substrate
temperature and the tempering temperature were found to be important
for controlling ICR, and the content of Al and Ni in the clads also ha
d significant influence on ICR. The intermetallic compounds formed in
the interface region were analyzed to understand the effect of Ni cont
ent on ICR. Clads of thickness from 1.2 to 1.5 mm that were crack free
and had good fusion were achieved by controlling the substrate temper
ature or adjusting the Al content in the clads.