What characterizes a neutral flame in oxyfuel cutting?

A neutral flame in oxyfuel cutting is characterized by the proper proportions of oxygen and fuel gas. This ideal mixture allows for complete combustion, which results in a flame that has a distinct inner cone that is neither oxidizing (too much oxygen) nor carburizing (too much fuel).

In the context of oxyfuel cutting, achieving a neutral flame is crucial for ensuring effective cutting. This flame type provides the necessary heat to melt the metal while creating a clean cut without excessive oxidation or contamination.

The properties of a neutral flame include a defined inner cone that is sharp and well-defined, and it typically does not produce soot. The flame color is usually a blue hue, indicating the balance of the gases. This characteristic is important for operators to recognize, as variations can lead to unsatisfactory cutting results and negatively affect the quality of the workpiece.