What type of flame should be avoided during oxyfuel cutting?

During oxyfuel cutting, a carburizing or oxidizing flame should be avoided because it can lead to poor cutting results and damage to the metal being worked on. A carburizing flame, which has excess acetylene, introduces carbon into the metal being cut. This can weaken the material and create undesirable microstructures in the cut edge. An oxidizing flame, on the other hand, can result in the formation of oxides and excessive heat that may lead to warping or burning through the metal.

By maintaining a neutral flame, which has a balanced ratio of oxygen and acetylene, you ensure optimal cutting conditions. The neutral flame produces a clean, focused heat that is ideal for cutting most metals without introducing impurities or affecting the material structure negatively.