Product Code: ICAL07_1606

Laser Alloying of Aluminum using a Deep Penetration Process with Fiber Laser
Authors:
Knut Partes, BIAS; Bremen Germany
Frank Vollertsen, BIAS; Bremen Germany
G. Habedank,, BIAS; Bremen Germany
Thomas Seefeld, BIAS; Bremen Germany
Presented at ICALEO 2007

Today laser alloying of Aluminum is a well known technique in order to increase the wear resistance of parts. The process is typically limited in depth to about 1 mm. In this study it is shown that a deeper alloying is possible by using the deep penetration effect caused by a highly intensive laser beam. The laser beam is scanned in a circular motion in order to control the track profile. By this manner of alloying it is possible to realize nearly rectangular and comparable deep track geometries. For Aluminum the reflectivity of near infrared wavelengths is comparably high. This makes conventional laser alloying inefficient. The overall absorption of the laser power using the deep penetration effect is comparably high. The comparison of the conventional laser alloying process and the deep penetration alloying process is shown in this study.