Aluminium-silicon alloys surfaces have been modified by LASER-irradiation. A 5 kW CO2 LASER has been used to melt the surface of casting alloys. The quenching speed is high and reach 104 to 105 K/s; the size of the silicon pirticles in hypereutectic alloy can be controlled by LASER treatment.
The wear resistance of these alloys increases after LASER treatment. Silicon content appears to be a dominant factor in resistance.
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© 1987 Laser Institute of America.
1987
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