Nozzle type selection
General laser cutting nozzle is divided into single-layer nozzle and double-layer nozzle. Single-layer nozzle is usually used for cutting stainless steel, aluminum alloy, copper alloy, etc., and generally uses nitrogen as the auxiliary gas. Double-layer nozzle is generally used for high-speed cutting because of its high gas flow rate, and is usually used for cutting carbon steel with oxygen, but its cutting surface will be blackened by oxidation.