Why is cooling the metal after cutting important?

Cooling the metal after cutting is crucial primarily because it helps prevent warping and cracking. When metal is subjected to intense heat, such as during the oxyfuel cutting process, it expands. If this heated metal is allowed to cool too rapidly or unevenly, it can lead to internal stresses that manifest as warping or cracking. By controlling the cooling process, the structural integrity of the metal is maintained, ensuring that the finished cut pieces remain flat and usable for further applications.

This consideration is especially important for materials that are more susceptible to thermal distortion, such as steel. Cooling methods can include methods like using wet rags, fans, or controlled ambient cooling to dissipate heat evenly and gradually, thus minimizing the risk of any distortion. Maintaining the integrity of the cut is essential for the metal's usability in its intended applications, making this step a pivotal element in the overall cutting process.