Kerf evacuation efficiency
Kerf evacuation is the process of removing abraded particles and molten metal from the cut gap to prevent secondary reactions. Insufficient evacuation leads to hard slag deposits.
Physical-chemical mechanism of action
The kerf evacuation refers to the removal of removed particles and liquid metal from the gap between tool and workpiece during the welding process. These particles can contain oxygen, which can lead to secondary reactions, such as the formation of nitrogen gas or corrosion.
Metallurgical relevance & risks in welding
Insufficient evacuation of the gap can lead to hard slag deposits and secondary reactions. This can impair the quality of the weld seam by causing the formation of pores or a coarser grain structure. In addition, it can lead to increased hardness and lower toughness of the material, which poses risks to mechanical strength.
Workshop practice & instructions for action
To ensure effective kerf evacuation, the following measures should be taken:
• Use high-quality welding protection equipment with an efficient gap protection system.
• Make sure the tool and workpiece are clean and free of particles or slag.
• Keep the welding process under optimal temperature and pressure conditions to ensure effective evacuation.