Research on Laser Micro Welding of an Aluminum Alloy Pressure Sensor

Abstract

This paper presents in detail the laser welding of a new mechatronic component belonging to the pressure sensors made ​​by aluminum alloy AW2007. Due to very high reflectivity of aluminum alloys, fast oxidation, the absorption of gases from the surrounding medium, special difficulties arise at laser beam welding and most situations require appropriate surface pretreatment. Given these issues, the paper present an experimental study on the influence of welding parameters on the seam quality for the aluminum alloy AW2007. In addition of the study regarding the influence of welding parameters, such as, laser power, welding speed, we conducted an analysis on the influence of the initial temperature of the material on the quality of the weld. Besides these aspects the paper presents a constructive solution for a device used to optimize the laser welding process of the sensor.

A Review: Welding by Laser Beam of Dissimilar Metals

“…The most research works focused on the relationship between the welding parameters, the properties of the weldment, and metallurgical structure. In dissimilar laser welding, a general rule is that the mechanical and corrosion resistance of the joint has to be at least comparable to that of the metal characterized by the lower properties [16]. Laser welding of dissimilar metals has attracted attention of the researchers worldwide.…”