Lángvágásra

Lángvágásra, also known as flame cutting, is a thermal cutting process that uses the heat of a combustion flame to cut through metals. It is typically used for cutting steel, particularly carbon steel and low-alloy steel, and is not suitable for stainless steel or aluminum due to their high thermal conductivity and the formation of oxide layers that prevent effective cutting. The process involves preheating the metal to its ignition temperature using a torch with a mixture of fuel gas and oxygen. Once the metal reaches this temperature, a jet of pure oxygen is directed at the heated spot. This oxygen jet oxidizes the metal, and the heat generated by this exothermic reaction, along with the preheating flame, melts and blows away the molten oxide, creating the cut. The speed and quality of the cut depend on factors such as the oxygen pressure, the nozzle size, the cutting speed, and the material's composition and thickness. Lángvágásra is widely employed in heavy fabrication, shipbuilding, demolition, and scrap processing due to its ability to cut thick sections of steel relatively quickly and economically. It is a versatile process that can be performed manually or with automated cutting machines, allowing for precise shapes and intricate designs to be achieved.