What is the process of "tack welding"?

The process of tack welding involves quickly welding short sections to hold metal pieces in position temporarily. This technique is commonly used in various welding projects to secure parts during the assembly phase, ensuring they remain aligned and stable before the more extensive and permanent welding processes are applied. Tack welding allows for adjustments to be made more easily since the connections are not final. Typically, the tacks are small welds made at specific points, which can be easily ground off or reworked without affecting the overall integrity of the components being joined.

The other options do not accurately define tack welding. Permanent joints are established through full, continuous welds, while tackling surface flaws refers to preparative measures taken before actual welding occurs. Additionally, the manipulation of metals through heating and bending would pertain more to processes such as forging or bending rather than the specific technique of tack welding.