The joining of tubular (hollow, sectioned) parts to each other or for rods, sheet-like pieces and occasionally for pipe segments, is often achieved by using technology that uses a pressure welding process. These processes use mostly electrical, thermochemical or mechanical energy, and the implementation is butt, stud or projection welding. Most the pressure welding processes are suitable for the joining of different quality materials. This article summarizes the possible process variations.

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The geometry and microstructure of the seam can be influenced by changing technological parameters such as laser power, welding speed, focus distance and shielding gas. In this research we examine the effect of laser power and focus distance on the quality of the breaking torque value while the welding speed and the shielding gas is unchanged. From the test results, we found that changing the defocus has no effect; a change in laser power affects ~15 %, while a change in welding position significantly affects the breaking torque.

Joining of tubular (hollow, sectioned) parts to each other or for rods-and sheet-like pieces, occasionally for pipe segments, are often made using technology applying a pressure welding process. These processes are using mostly electrical, thermochemical or mechanical energy, and the implementation is butt, stud or projection welding. Most of the pressure welding processes are suitable for joining of different material qualities. This article summarizes the possible process variations.

No abstract