Optimization of Disk Laser Welding Parameters in Pure Ti Using Taguchi Method

Abstract

The stability of industry market is also diversifying and being demanded with the concept of selecting lightweight and high strength materials. The titanium materials have been come into the spotlight as materials that meet these needs. Primarily, it affects the improvement in performance of industrial energy products such as plate heat exchangers. Therefore, It is necessary to use disk laser welding, which has the best beam characteristic among industrial lasers to contribute in the production. However, the researches of titanium materials have only been limited to achieve optimal results in implementing to the industry. In this study, an experimental method was established by using the orthogonal array table in the Taguchi method, and the SNR is output to the tensile strength. The experimental results has been employed for the influence of laser welding parameters on the weld shape, quality and mechanical properties of 0.6 mm thick lap joints of titanium alloy Ti (ASTM-B265 Grade 1) welded with a new generation disk laser TRUMPF TRUDISK 3302, emitting at 1030 nm, with maximum output power 3.3 kW at circular laser beam spot. As a result, the optimal welding parameters for the lap welding of pure titanium material were predicted as the welding speed of 2m/min, the laser power of 1.5 kW, the top shielding gas flow rate of 30ℓ/min and the bottom shielding gas flow rate of 10ℓ/min.

Laser Welding of ASTM A553-1 (9% Nickel Steel) (PART I: Penetration Shape by Bead on Plate)

“…Laser is the abbreviation of "Light Amplification by Stimulated Emission of Radiation" and refers to the welding method applying the output of the laser beam. Laser welding has been studied for application to various materials due to its low welding deformation, easy automation and its deep, narrow heat-affected part [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. The purpose of this study was to analyze the penetration characteristics of A553-1, according to the welding speed and power among the laser-welding parameters, and to improve the price competitiveness, by securing the weldability with good mechanical strength in the future.…”