Metal-cored wire
Metal-cored wire is a tubular wire filled with metal powder. This welding wire enables high deposition rates and reduces slag formation by controlled powder combustion.
Physicochemical Mechanism of Action
The metal powder cored wire consists of a tubular wire filled with metal powder. During welding, the powder is burned in a controlled manner and the resulting liquid contributes to melting the workpiece. This process increases melting efficiency and reduces slag formation.
Metallurgical Relevance & Risks in Welding
Using metal powder cored wire leads to improved weld quality with less slag and higher deposition rates. However, incorrect powder feed or faulty burning can cause over-burning, excessive pressure in the weld, or uneven distortion. It is crucial to precisely control the powder amount and the burning ratio.
Workshop Practice & Instructions
To use metal powder cored wire effectively, follow these steps:
• Use a special powder welding machine with the correct settings for the chosen powder type.
• Ensure the wire and powder are clean and free of blockages.
• Adjust the powder amount and burning ratio according to the manufacturer's instructions and continuously check weld quality.